255 FZUS63 KMKX 100201 GLFLM OPEN LAKE FORECAST for Lake Michigan National Weather Service Milwaukee/Sullivan WI 901 PM CDT Thu Jul 9 2026 FOR WATERS BEYOND FIVE NAUTICAL MILES OF SHORE ON Lake Michigan. Waves are provided as a range of significant wave heights, which is the average of the highest 1/3 of the wave, along with the average height of the highest 10% of the waves which will occasionally be encountered. .SYNOPSIS... Northwesterly winds will gradually shift northerly and diminish tonight, with fog developing across the majority of the lake as winds diminish. Patchy dense fog is possible, especially in the southern half of the Lake. Winds will remain north to northeast on Friday, as high pressure around 30.0 inches builds into the the region from the north. The high should shift southeast over the weekend. Light and variable winds are expected through the weekend. High pressure exits to the east into early next week, allowing for winds to shift to southwesterly into Tuesday. LMZ261-362-364-366-563-565-567-868-100930- Lake Michigan from Seul Choix Point to Rock Island Passage 5 NM offshore to Mid Lake- Lake Michigan South of a line from Seul Choix Point to the Mackinac Bridge and north of a line from Charlevoix MI to South Fox Island 5 NM offshore- Lake Michigan from Charlevoix to Point Betsie MI 5 NM offshore to Mid Lake- Lake Michigan from Point Betsie to Manistee MI 5 NM offshore to Mid Lake- Lake Michigan from Rock Island Passage to Sturgeon Bay WI- Lake Michigan from Sturgeon Bay to Two Rivers WI 5 NM offshore to Mid Lake- Lake Michigan from Two Rivers to Sheboygan WI 5 NM offshore to Mid Lake- Lake Michigan from Pentwater to Manistee MI 5 NM offshore to Mid Lake- 901 PM CDT Thu Jul 9 2026 SHEBOYGAN WI TO PENTWATER MI NORTH... .REST OF TONIGHT...North winds 10 to 15 kt diminishing to 5 to 10 kt. Waves 1 to 2 ft. .FRIDAY...Northeast winds 5 to 10 kt becoming north 10 to 20 kt. Waves 1 to 3 ft. .FRIDAY NIGHT...North winds 10 to 20 kt diminishing to 10 to 15 kt late in the evening, then becoming northeast after midnight becoming northeast 5 to 10 kt late. Waves 1 to 3 ft subsiding to 1 to 2 ft. .SATURDAY...East winds 5 to 10 kt becoming northeast 10 to 20 kt in the afternoon. Waves 1 to 2 ft. .SATURDAY NIGHT...East winds 10 to 15 kt veering to south 5 to 10 kt. Waves 1 to 2 ft. .SUNDAY...South winds 10 to 15 kt becoming southwest 10 to 20 kt. Waves 1 to 2 ft. .SUNDAY NIGHT...Southwest winds 10 to 20 kt. Waves 1 to 3 ft. .MONDAY...Southwest winds 10 to 20 kt increasing to 15 to 25 kt. Waves 2 to 4 ft. .TUESDAY...Southwest winds 15 to 25 kt increasing to 30 kt. Waves 3 to 5 ft. $$ LMZ080-669-671-673-675-777-779-870-872-874-876-878-100930- Lake Michigan from Michigan City IN to St. Joseph MI 5 NM offshore to Mid Lake- Lake Michigan from Sheboygan to Port Washington WI 5 NM offshore to Mid Lake- Lake Michigan from Port Washington to North Point Light WI 5 NM offshore to Mid Lake- Lake Michigan from North Point Light to Wind Point WI 5 NM offshore to Mid Lake- Lake Michigan from Wind Point WI to Winthrop Harbor IL 5 NM offshore to Mid Lake- Lake Michigan from Winthrop Harbor to Wilmette Harbor IL 5 NM offshore to Mid Lake- Lake Michigan from Wilmette Harbor IL to Michigan City IN 5 NM offshore to Mid Lake- Lake Michigan from Whitehall to Pentwater MI 5 NM offshore to Mid Lake- Lake Michigan from Grand Haven to Whitehall MI 5 NM offshore to Mid Lake- Lake Michigan from Holland to Grand Haven MI 5 NM offshore to Mid Lake- Lake Michigan from South Haven to Holland MI 5 NM offshore to Mid Lake- Lake Michigan from St. Joseph to South Haven MI 5 NM offshore to Mid Lake- 901 PM CDT Thu Jul 9 2026 SHEBOYGAN WI TO PENTWATER MI SOUTH... .REST OF TONIGHT...North winds 10 to 15 kt diminishing to 5 to 10 kt. Chance of showers and slight chance of thunderstorms through early evening. Patchy fog overnight. Waves 1 to 2 ft. .FRIDAY...Northeast winds 5 to 10 kt becoming north 10 to 20 kt. Waves 1 to 3 ft. .FRIDAY NIGHT...North winds 10 to 20 kt becoming northeast 5 to 10 kt. Waves 2 to 4 ft subsiding to 1 to 3 ft. .SATURDAY...Northeast winds 5 to 10 kt becoming north 10 to 20 kt in the afternoon. Waves 1 to 2 ft. .SATURDAY NIGHT...Northeast winds 10 to 15 kt becoming east 5 to 10 kt. Waves 1 to 3 ft. .SUNDAY...East winds 5 to 10 kt becoming northeast. Waves 1 ft or less. .SUNDAY NIGHT...Northeast winds 5 to 10 kt veering to south. Waves 1 ft or less. .MONDAY...South winds 10 to 15 kt increasing to 10 to 20 kt. Waves 1 to 2 ft. .TUESDAY...West winds 10 to 15 kt becoming southwest 10 to 20 kt. Waves 1 to 3 ft. $$ LMZ761-100930- MAFOR 1004/ MICHIGAN NORTH 12800 11100 11110 13820 11810. Waves 2 feet or less. MICHIGAN SOUTH 13800 11810 14820. A chance of showers late this evening. Waves 1 foot or less overnight. Waves 1 to 3 feet Friday and Friday evening. $$ MH Experimental modernized open lake forecast is available online at weather.gov/mkx/glftable Graphical marine forecasts are available online at: weather.gov/greatlakes  227 FZUS63 KMQT 100201 GLFLS Open Lake Forecast for Lake Superior National Weather Service Marquette MI 1001 PM EDT Thu Jul 9 2026 For waters beyond 5 nautical miles of shore on Lake Superior. Waves are the significant wave height - the average of the highest 1/3 of the wave spectrum. Occasional wave height is the average of the highest 1/10 of the wave spectrum. .SYNOPSIS... Weak high pressure of 30.0 inches extends over Lake Superior from Hudson Bay and northern Ontario tonight into Friday. High pressure builds to 30.1 to 30.2 inches over the lake this weekend as the high shifts south to the Lower Great Lakes through Sunday. A strong low of around 29.3 inches looks to cross into Hudson Bay early next week. LSZ162-100800- Lake Superior west of a line from Saxon Harbor WI to Grand Portage MN beyond 5NM- 1001 PM EDT Thu Jul 9 2026 /901 PM CDT Thu Jul 9 2026/ .REST OF TONIGHT...North winds less than 10 knots. Patchy fog. Waves calm to 2 feet. .FRIDAY...North winds less than 10 knots becoming northeast 5 to 15 knots in the afternoon, then veering east late. Waves calm to 2 feet. .FRIDAY NIGHT...Northeast winds 5 to 15 knots diminishing to less than 10 knots after midnight, then backing north late. A slight chance of showers and thunderstorms after midnight. Waves calm to 2 feet. .SATURDAY...South winds 5 to 15 knots backing east by mid afternoon. Waves calm to 2 feet. .SATURDAY NIGHT...East winds less than 10 knots becoming southwest 5 to 15 knots after midnight. Waves calm to 2 feet. .SUNDAY...Southwest winds 5 to 15 knots increasing to 10 to 20 knots by mid afternoon. Waves calm to 2 feet. .SUNDAY NIGHT...Southwest winds 10 to 20 knots. Waves building to 1 to 3 feet. .MONDAY...Southwest winds 20 to 30 knots. Waves building to 3 to 5 feet occasionally to 7 feet, then subsiding to 2 to 4 feet. .TUESDAY...Southwest winds 15 to 25 knots becoming north 10 to 20 knots. Waves subsiding to calm to 2 feet. $$ LSZ263-100800- Lake Superior from Saxon Harbor WI to Upper Entrance to Portage Canal MI 5NM off shore to the US/Canadian border including Isle Royale National Park- 1001 PM EDT Thu Jul 9 2026 .REST OF TONIGHT...North winds less than 10 knots backing west after midnight, then backing east late. Patchy fog. Waves calm to 2 feet. .FRIDAY...East winds less than 10 knots backing northeast in the afternoon, then veering east late. Patchy dense fog through early afternoon. Waves calm to 2 feet. .FRIDAY NIGHT...East winds 5 to 15 knots veering southeast after midnight, then backing east late. A slight chance of showers and thunderstorms after midnight. Waves calm to 2 feet. .SATURDAY...Southwest winds 5 to 15 knots backing southeast by mid afternoon. Waves calm to 2 feet. .SATURDAY NIGHT...Southeast winds 5 to 15 knots veering southwest after midnight. Waves calm to 2 feet. .SUNDAY...Southwest winds 5 to 15 knots increasing to 10 to 20 knots by mid afternoon. Waves building to 1 to 3 feet. .SUNDAY NIGHT...Southwest winds 15 to 25 knots. Waves building to 2 to 4 feet. .MONDAY...Southwest winds 20 to 30 knots. Waves building to 4 to 7 feet occasionally to 9 feet, then subsiding to 3 to 6 feet occasionally to 8 feet. .TUESDAY...West winds 15 to 25 knots diminishing to 10 to 20 knots. Waves subsiding to calm to 2 feet. $$ LSZ264-100800- Lake Superior from Upper Entrance to Portage Canal to Manitou Island MI 5NM off shore to the US/Canadian Border- 1001 PM EDT Thu Jul 9 2026 .REST OF TONIGHT...West winds less than 10 knots veering northwest after midnight, then veering northeast late. Patchy fog after midnight. Waves calm to 2 feet. .FRIDAY...East winds less than 10 knots veering southeast in the afternoon, then increasing to 5 to 15 knots late. Patchy fog through early afternoon. Waves calm to 2 feet. .FRIDAY NIGHT...Southeast winds 5 to 15 knots. A chance of showers. A slight chance of thunderstorms after midnight. Waves calm to 2 feet. .SATURDAY...Southeast winds less than 10 knots. Waves calm to 2 feet. .SATURDAY NIGHT...Southeast winds less than 10 knots becoming southwest 5 to 15 knots after midnight. Waves calm to 2 feet. .SUNDAY...Southwest winds 5 to 15 knots. Waves calm to 2 feet. .SUNDAY NIGHT...Southwest winds 10 to 20 knots increasing to 15 to 25 knots after midnight. Waves building to 2 to 4 feet. .MONDAY...Southwest winds 15 to 25 knots becoming west 20 to 30 knots. Waves building to 4 to 7 feet occasionally to 9 feet, then subsiding to 3 to 6 feet occasionally to 8 feet. .TUESDAY...West winds 20 to 30 knots diminishing to 10 to 20 knots. Waves subsiding to calm to 2 feet. $$ LSZ265-100800- Lake Superior West of Line from Manitou Island to Marquette MI Beyond 5NM from shore- 1001 PM EDT Thu Jul 9 2026 ...DENSE FOG ADVISORY IN EFFECT UNTIL 8 AM EDT FRIDAY... .REST OF TONIGHT...Southwest winds 5 to 15 knots veering west after midnight, then veering north late. Patchy fog. Waves calm to 2 feet. .FRIDAY...East winds 5 to 15 knots veering southeast late. Waves calm to 2 feet. .FRIDAY NIGHT...Southeast winds 5 to 15 knots increasing to 10 to 20 knots after midnight. A slight chance of showers and thunderstorms after midnight. Waves calm to 2 feet. .SATURDAY...Southeast winds 5 to 15 knots becoming east 10 to 20 knots by mid afternoon. Waves calm to 2 feet. .SATURDAY NIGHT...Southeast winds 5 to 15 knots veering south after midnight. Waves calm to 2 feet. .SUNDAY...Southwest winds 10 to 20 knots backing southeast by mid afternoon. Waves calm to 2 feet. .SUNDAY NIGHT...South winds 10 to 20 knots becoming southwest 15 to 25 knots after midnight. Waves building to 1 to 3 feet. .MONDAY...Southwest winds 10 to 20 knots increasing to 20 to 30 knots. Waves subsiding to calm to 2 feet, then building to 3 to 5 feet occasionally to 7 feet. .TUESDAY...West winds 15 to 25 knots diminishing to 10 to 20 knots. Waves subsiding to calm to 2 feet. $$ LSZ266-100800- Lake Superior East of a line from Manitou Island to Marquette MI and West of a line from Grand Marais MI to the US/Canadian Border Beyond 5NM from shore- 1001 PM EDT Thu Jul 9 2026 ...DENSE FOG ADVISORY IN EFFECT UNTIL 8 AM EDT FRIDAY... .REST OF TONIGHT...Northwest winds 5 to 15 knots veering north late. Patchy fog by midnight. Areas of dense fog after midnight. Waves calm to 2 feet. .FRIDAY...Northeast winds 5 to 15 knots veering southeast in the afternoon. Areas of dense fog through early afternoon. Waves calm to 2 feet. .FRIDAY NIGHT...Southeast winds 5 to 15 knots. A slight chance of showers after midnight. Waves calm to 2 feet. .SATURDAY...Southeast winds 5 to 15 knots. Waves calm to 2 feet. .SATURDAY NIGHT...Southeast winds 5 to 15 knots becoming south 10 to 20 knots after midnight. Waves calm to 2 feet. .SUNDAY...South winds 5 to 15 knots. Waves calm to 2 feet. .SUNDAY NIGHT...South winds 10 to 20 knots becoming southwest 15 to 25 knots after midnight. Waves building to 2 to 4 feet. .MONDAY...Southwest winds 10 to 20 knots increasing to 20 to 30 knots. Waves building to 4 to 7 feet occasionally to 9 feet. .TUESDAY...West winds 15 to 25 knots becoming northwest 10 to 20 knots. Waves subsiding to calm to 2 feet. $$ LSZ267-100800- Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off shore to the US/Canadian border- 1001 PM EDT Thu Jul 9 2026 ...DENSE FOG ADVISORY IN EFFECT UNTIL 8 AM EDT FRIDAY... .REST OF TONIGHT...Northwest winds 5 to 15 knots. Patchy fog by midnight, then areas of dense fog after midnight. Waves calm to 2 feet. .FRIDAY...North winds 5 to 15 knots backing northwest in the afternoon. Areas of dense fog through early afternoon. Waves calm to 2 feet. .FRIDAY NIGHT...North winds 5 to 15 knots veering south after midnight, then backing southeast late. Waves calm to 2 feet. .SATURDAY...Southeast winds 5 to 15 knots backing east by mid afternoon. Waves calm to 2 feet. .SATURDAY NIGHT...Southeast winds 5 to 15 knots becoming south 10 to 20 knots after midnight. Waves calm to 2 feet. .SUNDAY...South winds 5 to 15 knots backing southeast by mid afternoon. Waves calm to 2 feet. .SUNDAY NIGHT...South winds 5 to 15 knots becoming southwest 10 to 20 knots after midnight. Waves building to 1 to 3 feet. .MONDAY...Southwest winds 5 to 15 knots increasing to 10 to 20 knots. Waves subsiding to calm to 2 feet, then building to 2 to 4 feet. .TUESDAY...West winds 10 to 20 knots becoming northwest 5 to 15 knots. Waves building to 3 to 5 feet occasionally to 7 feet, then subsiding to calm to 2 feet. $$ LSZ261-100800- MAFOR 1003/ Superior West 12800 11100 12200 11100 12200. Waves 1 foot or less. Superior North Central 11700 11700 19704 11100 11200 14300. Waves 1 foot or less. Superior South Central 11600 11800 19804 11804 11100 19104 11200 11300 12310. Waves 1 foot or less. Superior East 11700 11704 12804 11700 11600 11700 11800. Waves 1 foot or less. $$ WFO MQT Experimental modernized open lake forecast is available online at weather.gov/mqt/glftable Graphical marine forecasts are available online at: weather.gov/greatlakes  312 FZUS61 KBUF 100202 GLFLO Open Lake Forecast for Lake Ontario National Weather Service Buffalo NY 1002 PM EDT Thu Jul 9 2026 For waters beyond five nautical miles of shore on Lake Ontario Waves are the significant wave height - the average of the highest 1/3 of the wave spectrum. Occasional wave height is the average of the highest 1/10 of the wave spectrum. .SYNOPSIS...A weak cold front will cross the Lake tonight through early Friday. Another 30.0 inch high will then build across the upper Great Lakes Friday and the lower Great Lakes over the weekend, expanding east into New England Monday, then drifting south into the Mid-Atlantic Tuesday. This will allow for a warm front to pass across the lake Tuesday. LOZ062-100900- Lake Ontario open waters from the Niagara River to Hamlin Beach- 1002 PM EDT Thu Jul 9 2026 .OVERNIGHT...Southwest winds 10 knots or less becoming northwest. A chance of showers. Waves 1 foot or less. .FRIDAY...North winds less than 10 knots. Waves 1 foot or less. .FRIDAY NIGHT...Light and variable winds becoming northeast 5 to 10 knots. Waves 1 foot or less. .SATURDAY...Northeast winds 10 knots or less becoming east. Waves 2 feet or less. .SATURDAY NIGHT...Northeast winds less than 10 knots. Waves 1 foot or less. .SUNDAY...Light and variable winds. Waves 1 foot or less. .MONDAY...Southwest winds 10 knots or less. Waves 2 feet or less. .TUESDAY...Southwest winds 10 to 15 knots becoming west 15 to 20 knots. Waves 1 to 3 feet building to 3 to 5 feet. $$ LOZ063>065-100900- Lake Ontario open waters from Hamlin Beach to the Saint Lawrence River- 1002 PM EDT Thu Jul 9 2026 .OVERNIGHT...West winds 5 to 10 knots becoming northwest. A chance of showers late. Waves 1 foot or less. .FRIDAY...Northwest winds less than 10 knots. A chance of showers early. Waves 1 foot or less. .FRIDAY NIGHT...Northwest winds 10 knots or less becoming northeast 10 to 15 knots. Waves 2 feet or less. .SATURDAY...Northeast winds 5 to 15 knots. Waves 2 feet or less. .SATURDAY NIGHT...North winds 10 knots or less becoming northeast. Waves 1 foot or less. .SUNDAY...Northeast winds 10 knots or less becoming south. Waves 1 foot or less. .MONDAY...South winds 5 to 10 knots becoming southwest. Waves 2 feet or less. .TUESDAY...Southwest winds 10 to 15 knots becoming west 15 to 20 knots. Waves 1 to 3 feet building to 3 to 5 feet. $$ LOZ061-100900- MAFOR 1003/ ONTARIO WEST 1/2 12600 13800 11100 11600 11700. A chance of showers overnight. Waves 1 foot or less. ONTARIO EAST 1/2 12600 11700 11800 14700. Waves 1 foot or less. $$  347 FZUS61 KBUF 100203 GLFSL Forecast for the Saint Lawrence River including the Thousand Islands Region National Weather Service Buffalo NY 1003 PM EDT Thu Jul 9 2026 SLZ022-024-100900- Saint Lawrence River from Cape Vincent to Saint Regis 1003 PM EDT Thu Jul 9 2026 .REST OF TONIGHT...Light and variable winds. A chance of showers late this evening. .FRIDAY...Light and variable winds. Becoming mostly sunny. .FRIDAY NIGHT...North winds less than 10 knots. Mainly clear in the evening, then becoming partly cloudy. .SATURDAY...Northeast winds 10 knots or less becoming north. Sunny. .SATURDAY NIGHT...North winds less than 10 knots. Clear. .SUNDAY...Light and variable winds. Mainly clear. .MONDAY...Southwest winds 5 to 10 knots. Mainly clear, then becoming partly cloudy. .TUESDAY...Southwest winds 5 to 15 knots becoming west. A chance of showers Tuesday night. $$  490 FZUS63 KDTX 100206 GLFLH Open Lake Forecast for Lake Huron National Weather Service Detroit/Pontiac MI 1006 PM EDT Thu Jul 9 2026 For waters beyond five nautical miles off shore on Lake Huron Waves are the significant wave height - the average of the highest 1/3 of the wave spectrum. Occasional wave height is the average of the highest 1/10 of the wave spectrum. .SYNOPSIS...A cold front stalls across the southern Great Lakes Friday morning, maintaining a chance for showers and thunderstorms near Lake St. Clair and western Lake Erie. Meanwhile, high pressure develops over the northern Great Lakes. This high migrates southward into the central Great Lakes through this weekend, strengthening slightly to 30.20 inches while offering benign conditions. LHZ361-101015- Lake Huron from 5NM east of Mackinac Bridge to Presque Isle Lt beyond 5 NM off shore- 1006 PM EDT Thu Jul 9 2026 .REST OF TONIGHT...Northwest winds 5 to 10 knots. Waves 2 feet or less. .FRIDAY...North winds 5 to 10 knots in the morning becoming light and variable. Waves 2 feet or less. .FRIDAY NIGHT...Light and variable winds. Waves 2 feet or less. .SATURDAY...Light and variable winds becoming east 5 to 10 knots early in the afternoon. Waves 2 feet or less. .SATURDAY NIGHT...Light and variable winds becoming south 5 to 10 knots in the late evening and overnight. Waves 2 feet or less. .SUNDAY...South winds 5 to 10 knots backing to the east late in the afternoon...then veering to the southwest late in the evening. Waves 2 feet or less. .MONDAY...Southwest winds 10 to 15 knots. Waves 1 to 3 feet building to 3 to 5 feet by midnight. .TUESDAY...West winds 15 to 20 knots decreasing to 10 to 15 knots by midnight. Waves 3 to 5 feet. $$ LHZ362-363-101015- Lake Huron from Presque Isle Light to Sturgeon Point MI beyond 5NM off shore- Lake Huron from Sturgeon Point to Alabaster MI beyond 5NM off shore- 1006 PM EDT Thu Jul 9 2026 .REST OF TONIGHT...Light and variable winds. Waves 2 feet or less. .FRIDAY...Light and variable winds. Waves 2 feet or less. .FRIDAY NIGHT...Light and variable winds. Waves 2 feet or less. .SATURDAY...Light and variable winds. Waves 2 feet or less. .SATURDAY NIGHT...Light and variable winds. Waves 2 feet or less. .SUNDAY...Light and variable winds becoming southeast 5 to 10 knots. Waves 2 feet or less. .MONDAY...Southwest winds 5 to 10 knots. Waves 1 to 3 feet. .TUESDAY...Southwest winds 10 to 15 knots. Waves 2 to 4 feet. $$ LHZ462>464-101015- Lake Huron from Port Austin to Harbor Beach beyond 5NM Off Shore- Lake Huron from Harbor Beach to Port Sanilac beyond 5NM Off Shore- Lake Huron from Port Sanilac to Port Huron beyond 5NM Off Shore- 1006 PM EDT Thu Jul 9 2026 .REST OF TONIGHT...Light and variable winds becoming north 5 to 10 knots early in the morning. Scattered showers and thunderstorms this evening. Waves 2 feet or less. .FRIDAY...North winds 5 to 10 knots increasing to 10 to 15 knots late in the afternoon. Waves 2 feet or less. .FRIDAY NIGHT...North winds 10 to 15 knots becoming northeast 5 to 10 knots in the late evening and overnight. Waves 1 to 3 feet. .SATURDAY...North winds 5 to 10 knots. Waves 2 feet or less. .SATURDAY NIGHT...Northeast winds 5 to 10 knots becoming light and variable. Waves 1 to 3 feet. .SUNDAY...Light and variable winds becoming southeast 5 to 10 knots late in the evening. Waves 2 feet or less. .MONDAY...South winds 5 to 10 knots. Waves 2 feet or less. .TUESDAY...Southwest winds 5 to 10 knots becoming west 10 to 15 knots . Waves 1 to 3 feet building to 2 to 4 feet . $$ LHZ461-101015- MAFOR 1003/ HURON NORTH 13700 12800 11700 11600 11800. Waves nearly calm. HURON SOUTH 16800. Waves 2 feet or less. $$ AA Experimental modernized open lake forecast is available online at weather.gov/dtx/glftable (all lower case) Graphical marine forecasts are available online at weather.gov/greatlakes (all lower case)  388 FZUS63 KDTX 100222 GLFSC Lake St Clair Forecast National Weather Service Detroit/Pontiac MI 1022 PM EDT Thu Jul 9 2026 Waves are the significant wave height - the average of the highest 1/3 of the wave spectrum. Occasional wave height is the average of the highest 1/10 of the wave spectrum. .SYNOPSIS...A cold front stalls across the southern Great Lakes Friday morning, maintaining a chance for showers and thunderstorms near Lake St. Clair and western Lake Erie. Meanwhile, high pressure develops over the northern Great Lakes. This high migrates southward into the central Great Lakes through this weekend, strengthening slightly to 30.20 inches while offering benign conditions. LCZ460-101030- Lake St Clair- 1022 PM EDT Thu Jul 9 2026 .REST OF TONIGHT...Southwest winds 5 to 10 knots veering to the northwest after midnight. Mostly cloudy becoming partly cloudy after midnight becoming mostly cloudy. Scattered showers and thunderstorms this evening. Waves 2 feet or less. .FRIDAY...Northeast winds 5 to 10 knots. Partly sunny. A chance of light showers late in the afternoon. Waves 2 feet or less. .FRIDAY NIGHT...Northeast winds 10 to 15 knots becoming north 5 to 10 knots after midnight. Partly cloudy. Waves 2 feet or less. .SATURDAY...North winds 10 to 15 knots becoming northeast 5 to 10 knots in the late morning and afternoon. Partly sunny. Waves 2 feet or less. .SATURDAY NIGHT...Northeast winds 10 to 15 knots diminishing to 5 to 10 knots after midnight. Mostly clear. Waves 2 feet or less. .SUNDAY...East winds 5 to 10 knots. Clear. Waves 2 feet or less. .MONDAY...South winds 5 to 10 knots. Clear. Waves 2 feet or less. .TUESDAY...Southwest winds 10 to 15 knots. Clear. Waves 2 feet or less. $$ AA Experimental modernized open lake forecast is available online at weather.gov/dtx/glftablesc Graphical marine forecasts are available at weather.gov/greatlakes  575 FZUS63 KMQT 100251 GLFLS Open Lake Forecast for Lake Superior National Weather Service Marquette MI 1051 PM EDT Thu Jul 9 2026 For waters beyond 5 nautical miles of shore on Lake Superior. Waves are the significant wave height - the average of the highest 1/3 of the wave spectrum. Occasional wave height is the average of the highest 1/10 of the wave spectrum. .SYNOPSIS... Weak high pressure of 30.0 inches extends over Lake Superior from Hudson Bay and northern Ontario tonight into Friday. High pressure builds to 30.1 to 30.2 inches over the lake this weekend as the high shifts south to the Lower Great Lakes through Sunday. A strong low of around 29.3 inches looks to cross into Hudson Bay early next week. LSZ162-101100- Lake Superior west of a line from Saxon Harbor WI to Grand Portage MN beyond 5NM- 1051 PM EDT Thu Jul 9 2026 /951 PM CDT Thu Jul 9 2026/ ...DENSE FOG ADVISORY IN EFFECT UNTIL 11 AM EDT /10 AM CDT/ FRIDAY... .REST OF TONIGHT...North winds less than 10 knots. Areas of dense fog. Waves calm to 2 feet. .FRIDAY...North winds less than 10 knots becoming northeast 5 to 15 knots in the afternoon, then veering east late. Patchy dense fog through early afternoon. Waves calm to 2 feet. .FRIDAY NIGHT...Northeast winds 5 to 15 knots diminishing to less than 10 knots after midnight, then backing north late. A slight chance of showers and thunderstorms after midnight. Waves calm to 2 feet. .SATURDAY...South winds 5 to 15 knots backing east by mid afternoon. Waves calm to 2 feet. .SATURDAY NIGHT...East winds less than 10 knots becoming southwest 5 to 15 knots after midnight. Waves calm to 2 feet. .SUNDAY...Southwest winds 5 to 15 knots increasing to 10 to 20 knots by mid afternoon. Waves calm to 2 feet. .SUNDAY NIGHT...Southwest winds 10 to 20 knots. Waves building to 1 to 3 feet. .MONDAY...Southwest winds 20 to 30 knots. Waves building to 3 to 5 feet occasionally to 7 feet, then subsiding to 2 to 4 feet. .TUESDAY...Southwest winds 15 to 25 knots becoming north 10 to 20 knots. Waves subsiding to calm to 2 feet. $$ LSZ263-101100- Lake Superior from Saxon Harbor WI to Upper Entrance to Portage Canal MI 5NM off shore to the US/Canadian border including Isle Royale National Park- 1051 PM EDT Thu Jul 9 2026 ...DENSE FOG ADVISORY IN EFFECT UNTIL 11 AM EDT FRIDAY... .REST OF TONIGHT...North winds less than 10 knots backing west after midnight, then backing east late. Areas of dense fog. Waves calm to 2 feet. .FRIDAY...East winds less than 10 knots backing northeast in the afternoon, then veering east late. Areas of dense fog through early afternoon. Waves calm to 2 feet. .FRIDAY NIGHT...East winds 5 to 15 knots veering southeast after midnight, then backing east late. A slight chance of showers and thunderstorms after midnight. Waves calm to 2 feet. .SATURDAY...Southwest winds 5 to 15 knots backing southeast by mid afternoon. Waves calm to 2 feet. .SATURDAY NIGHT...Southeast winds 5 to 15 knots veering southwest after midnight. Waves calm to 2 feet. .SUNDAY...Southwest winds 5 to 15 knots increasing to 10 to 20 knots by mid afternoon. Waves building to 1 to 3 feet. .SUNDAY NIGHT...Southwest winds 15 to 25 knots. Waves building to 2 to 4 feet. .MONDAY...Southwest winds 20 to 30 knots. Waves building to 4 to 7 feet occasionally to 9 feet, then subsiding to 3 to 6 feet occasionally to 8 feet. .TUESDAY...West winds 15 to 25 knots diminishing to 10 to 20 knots. Waves subsiding to calm to 2 feet. $$ LSZ264-101100- Lake Superior from Upper Entrance to Portage Canal to Manitou Island MI 5NM off shore to the US/Canadian Border- 1051 PM EDT Thu Jul 9 2026 ...DENSE FOG ADVISORY IN EFFECT UNTIL 11 AM EDT FRIDAY... .REST OF TONIGHT...West winds less than 10 knots veering northwest after midnight, then veering northeast late. Areas of dense fog. Waves calm to 2 feet. .FRIDAY...East winds less than 10 knots veering southeast in the afternoon, then increasing to 5 to 15 knots late. Areas of dense fog through early afternoon. Waves calm to 2 feet. .FRIDAY NIGHT...Southeast winds 5 to 15 knots. A chance of showers. A slight chance of thunderstorms after midnight. Waves calm to 2 feet. .SATURDAY...Southeast winds less than 10 knots. Waves calm to 2 feet. .SATURDAY NIGHT...Southeast winds less than 10 knots becoming southwest 5 to 15 knots after midnight. Waves calm to 2 feet. .SUNDAY...Southwest winds 5 to 15 knots. Waves calm to 2 feet. .SUNDAY NIGHT...Southwest winds 10 to 20 knots increasing to 15 to 25 knots after midnight. Waves building to 2 to 4 feet. .MONDAY...Southwest winds 15 to 25 knots becoming west 20 to 30 knots. Waves building to 4 to 7 feet occasionally to 9 feet, then subsiding to 3 to 6 feet occasionally to 8 feet. .TUESDAY...West winds 20 to 30 knots diminishing to 10 to 20 knots. Waves subsiding to calm to 2 feet. $$ LSZ265-101100- Lake Superior West of Line from Manitou Island to Marquette MI Beyond 5NM from shore- 1051 PM EDT Thu Jul 9 2026 ...DENSE FOG ADVISORY IN EFFECT UNTIL 11 AM EDT FRIDAY... .REST OF TONIGHT...Southwest winds 5 to 15 knots veering west after midnight, then veering north late. Patchy dense fog. Waves calm to 2 feet. .FRIDAY...East winds 5 to 15 knots veering southeast late. Areas of dense fog through early afternoon. Waves calm to 2 feet. .FRIDAY NIGHT...Southeast winds 5 to 15 knots increasing to 10 to 20 knots after midnight. A slight chance of showers and thunderstorms after midnight. Waves calm to 2 feet. .SATURDAY...Southeast winds 5 to 15 knots becoming east 10 to 20 knots by mid afternoon. Waves calm to 2 feet. .SATURDAY NIGHT...Southeast winds 5 to 15 knots veering south after midnight. Waves calm to 2 feet. .SUNDAY...Southwest winds 10 to 20 knots backing southeast by mid afternoon. Waves calm to 2 feet. .SUNDAY NIGHT...South winds 10 to 20 knots becoming southwest 15 to 25 knots after midnight. Waves building to 1 to 3 feet. .MONDAY...Southwest winds 10 to 20 knots increasing to 20 to 30 knots. Waves subsiding to calm to 2 feet, then building to 3 to 5 feet occasionally to 7 feet. .TUESDAY...West winds 15 to 25 knots diminishing to 10 to 20 knots. Waves subsiding to calm to 2 feet. $$ LSZ266-101100- Lake Superior East of a line from Manitou Island to Marquette MI and West of a line from Grand Marais MI to the US/Canadian Border Beyond 5NM from shore- 1051 PM EDT Thu Jul 9 2026 ...DENSE FOG ADVISORY IN EFFECT UNTIL 11 AM EDT FRIDAY... .REST OF TONIGHT...Northwest winds 5 to 15 knots veering north late. Areas of dense fog. Waves calm to 2 feet. .FRIDAY...Northeast winds 5 to 15 knots veering southeast in the afternoon. Areas of dense fog through early afternoon. Waves calm to 2 feet. .FRIDAY NIGHT...Southeast winds 5 to 15 knots. A slight chance of showers after midnight. Waves calm to 2 feet. .SATURDAY...Southeast winds 5 to 15 knots. Waves calm to 2 feet. .SATURDAY NIGHT...Southeast winds 5 to 15 knots becoming south 10 to 20 knots after midnight. Waves calm to 2 feet. .SUNDAY...South winds 5 to 15 knots. Waves calm to 2 feet. .SUNDAY NIGHT...South winds 10 to 20 knots becoming southwest 15 to 25 knots after midnight. Waves building to 2 to 4 feet. .MONDAY...Southwest winds 10 to 20 knots increasing to 20 to 30 knots. Waves building to 4 to 7 feet occasionally to 9 feet. .TUESDAY...West winds 15 to 25 knots becoming northwest 10 to 20 knots. Waves subsiding to calm to 2 feet. $$ LSZ267-101100- Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off shore to the US/Canadian border- 1051 PM EDT Thu Jul 9 2026 ...DENSE FOG ADVISORY IN EFFECT UNTIL 11 AM EDT FRIDAY... .RESTOF TONIGHT...Northwest winds 5 to 15 knots. Areas of dense fog. Waves calm to 2 feet. .FRIDAY...North winds 5 to 15 knots backing northwest in the afternoon. Patchy dense fog through early afternoon. Waves calm to 2 feet. .FRIDAY NIGHT...North winds 5 to 15 knots veering south after midnight, then backing southeast late. Waves calm to 2 feet. .SATURDAY...Southeast winds 5 to 15 knots backing east by mid afternoon. Waves calm to 2 feet. .SATURDAY NIGHT...Southeast winds 5 to 15 knots becoming south 10 to 20 knots after midnight. Waves calm to 2 feet. .SUNDAY...South winds 5 to 15 knots backing southeast by mid afternoon. Waves calm to 2 feet. .SUNDAY NIGHT...South winds 5 to 15 knots becoming southwest 10 to 20 knots after midnight. Waves building to 1 to 3 feet. .MONDAY...Southwest winds 5 to 15 knots increasing to 10 to 20 knots. Waves subsiding to calm to 2 feet, then building to 2 to 4 feet. .TUESDAY...West winds 10 to 20 knots becoming northwest 5 to 15 knots. Waves building to 3 to 5 feet occasionally to 7 feet, then subsiding to calm to 2 feet. $$ LSZ261-101100- MAFOR 1003/ Superior West 12804 11104 11200 19204 11200 11100 12200. Waves 1 foot or less. Superior North Central 12704 11104 11204 11304 13300. Waves 1 foot or less. Superior South Central 11600 19604 12804 11104 11204 11300 12310. Waves 1 foot or less. Superior East 12704 12804 11700 11600 11700 11800. Waves 1 foot or less. $$ NJL Experimental modernized open lake forecast is available online at weather.gov/mqt/glftable Graphical marine forecasts are available online at: weather.gov/greatlakes