459 FZUS63 KMQT 170201 GLFLS Open Lake Forecast for Lake Superior National Weather Service Marquette MI 1001 PM EDT Fri Oct 16 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... A 30.6 inch high over the Plains extends 30.3 to 30.4 inch ridging over Lake Superior tonight. The high then slides south of the Great Lakes at 30.5 inches by Saturday night as a 29.2 inch Alberta Clipper moves through the northern Canadian Prairie Provinces towards Hudson Bay, deepening to 29.0 inches by the time it arrives at Hudson Bay on Sunday. This brings weak 30.0 inch troughing to northern Lake Superior on Sunday. As the low continues east over Hudson Bay and weakens with time Sunday night into Monday afternoon, high pressure ridging of 30.3 inches returns to the Upper Great Lakes by Monday. The high pressure ridging strengthens to 30.4 inches over Lake Superior by Tuesday as the now 30.5 inch parent high over northern Ontario continues east into northern Quebec. As the high continues to retreat eastward, the ridging over Lake Superior may potentially weaken to 30.2 inches by Wednesday. LSZ162-170800- Lake Superior west of a line from Saxon Harbor WI to Grand Portage MN beyond 5NM- 1001 PM EDT Fri Oct 16 2026 /901 PM CDT Fri Oct 16 2026/ .REST OF TONIGHT...Northwest winds 10 to 20 knots backing west after midnight, then becoming southwest 15 to 25 knots late. Waves 1 to 3 feet subsiding to calm to 2 feet, then building to 3 to 5 feet occasionally to 7 feet. .SATURDAY...Southwest winds 20 to 30 knots increasing to 30 knots with a few gale force gusts to 35 knots possible in the afternoon, then diminishing to 20 to 30 knots late. Waves building to 7 to 10 feet occasionally to 13 feet, then subsiding to 4 to 7 feet occasionally to 9 feet. .SATURDAY NIGHT...Southwest winds to 30 knots with a few gale force gusts to 40 knots possible. Waves building to 8 to 11 feet occasionally to 14 feet. .SUNDAY...Southwest gales to 40 knots. Waves subsiding to 4 to 7 feet occasionally to 9 feet. .SUNDAY NIGHT...Southwest winds 15 to 25 knots becoming west 5 to 15 knots after midnight. Waves subsiding to calm to 2 feet. .MONDAY...Northwest winds 5 to 15 knots veering east by mid afternoon. Waves calm to 2 feet. .MONDAY NIGHT...Northeast winds less than 10 knots increasing to 5 to 15 knots after midnight. Waves calm to 2 feet. .TUESDAY...East winds 5 to 15 knots veering south. Waves calm to 2 feet. .WEDNESDAY...South winds 5 to 15 knots veering southwest. Waves calm to 2 feet. $$ LSZ263-170800- Lake Superior from Saxon Harbor WI to Upper Entrance to Portage Canal MI 5NM off shore to the US/Canadian border including Isle Royale National Park- 1001 PM EDT Fri Oct 16 2026 .REST OF TONIGHT...Northwest winds 5 to 15 knots backing west after midnight, then increasing to 15 to 25 knots late. Waves 2 to 4 feet subsiding to calm to 2 feet, then building to 3 to 6 feet occasionally to 8 feet. .SATURDAY...Southwest winds 20 to 30 knots increasing to 30 knots with a few gale force gusts to 35 knots possible in the afternoon. Waves building to 8 to 11 feet occasionally to 14 feet, then subsiding to 6 to 9 feet occasionally to 11 feet. .SATURDAY NIGHT...Southwest winds to 30 knots with a few gale force gusts to 40 knots possible. Waves subsiding to 5 to 8 feet occasionally to 10 feet, then building to 9 to 12 feet occasionally to 15 feet. .SUNDAY...Southwest gales to 40 knots. Waves building to 10 to 14 feet occasionally to 18 feet, then subsiding to 5 to 8 feet occasionally to 10 feet. .SUNDAY NIGHT...Southwest winds 15 to 25 knots becoming west 10 to 20 knots after midnight.Waves subsiding to 1 to 3 feet. .MONDAY...Northwest winds 5 to 15 knots becoming east less than 10 knots by mid afternoon. Waves subsiding to calm to 2 feet. .MONDAY NIGHT...East winds less than 10 knots. Waves calm to 2 feet. .TUESDAY...East winds 5 to 15 knots veering south. Waves calm to 2 feet. .WEDNESDAY...South winds 5 to 15 knots becoming southwest 10 to 20 knots. Waves building to 1 to 3 feet, then subsiding to calm to 2 feet. $$ LSZ264-170800- Lake Superior from Upper Entrance to Portage Canal to Manitou Island MI 5NM off shore to the US/Canadian Border- 1001 PM EDT Fri Oct 16 2026 .REST OF TONIGHT...Northwest winds 10 to 20 knots diminishing to 5 to 15 knots after midnight, then becoming west 15 to 25 knots late. Waves 3 to 6 feet occasionally to 8 feet subsiding to 1 to 3 feet, then building to 3 to 5 feet occasionally to 7 feet. .SATURDAY...West winds 20 to 30 knots increasing to 30 knots with a few gale force gusts to 35 knots possible in the afternoon, then diminishing to 20 to 30 knots late. Waves building to 8 to 11 feet occasionally to 14 feet, then subsiding to 6 to 9 feet occasionally to 11 feet. .SATURDAY NIGHT...Southwest winds 20 to 30 knots increasing to 30 knots with a few gale force gusts to 40 knots possible after midnight. Waves subsiding to 5 to 8 feet occasionally to 10 feet, then building to 9 to 12 feet occasionally to 15 feet. .SUNDAY...Southwest gales to 40 knots. Waves building to 10 to 14 feet occasionally to 18 feet, then subsiding to 7 to 10 feet occasionally to 13 feet. .SUNDAY NIGHT...Southwest winds 15 to 25 knots becoming west 10 to 20 knots after midnight. Waves subsiding to 2 to 4 feet. .MONDAY...Northwest winds 5 to 15 knots diminishing to less than 10 knots by mid afternoon. Waves subsiding to calm to 2 feet. .MONDAY NIGHT...South winds less than 10 knots backing east after midnight. Waves calm to 2 feet. .TUESDAY...East winds 5 to 15 knots veering south. Waves calm to 2 feet. .WEDNESDAY...South winds 5 to 15 knots becoming southwest 10 to 20 knots. Waves building to 1 to 3 feet. $$ LSZ265-170800- Lake Superior West of Line from Manitou Island to Marquette MI Beyond 5NM from shore- 1001 PM EDT Fri Oct 16 2026 .REST OF TONIGHT...Northwest winds 15 to 25 knots diminishing to 10 to 20 knots after midnight, then becoming west 15 to 25 knots late. Waves 5 to 8 feet occasionally to 10 feet subsiding to 1 to 3 feet, then building to 2 to 4 feet. .SATURDAY...West winds 20 to 30 knots becoming southwest 15 to 25 knots late. Waves building to 3 to 6 feet occasionally to 8 feet, then subsiding to 2 to 4 feet. .SATURDAY NIGHT...Southwest winds 20 to 30 knots increasing to 30 knots with a few gale force gusts to 35 knots possible late. Waves building to 3 to 6 feet occasionally to 8 feet. .SUNDAY...Southwest gales to 35 knots diminishing to 20 to 30 knots by mid afternoon. Waves building to 4 to 7 feet occasionally to 9 feet, then subsiding to 1 to 3 feet. .SUNDAY NIGHT...Southwest winds 15 to 25 knots becoming west 10 to 20 knots after midnight. Waves subsiding to calm to 2 feet. .MONDAY...West winds 5 to 15 knots veering northeast by mid afternoon. Waves calm to 2 feet. .MONDAY NIGHT...East winds 5 to 15 knots veering southeast after midnight. Waves calm to 2 feet. .TUESDAY...Southeast winds 5 to 15 knots becoming south 10 to 20 knots. Waves calm to 2 feet. .WEDNESDAY...South winds 10 to 20 knots increasing to 15 to 25 knots. Waves building to 1 to 3 feet, then subsiding to calm to 2 feet. $$ LSZ266-170800- 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 Fri Oct 16 2026 .REST OF TONIGHT...North winds 20 to 30 knots becoming northwest 10 to 20 knots after midnight, then backingwest late. Waves 7 to 10 feet occasionally to 13 feet subsiding to 2 to 4 feet. .SATURDAY...West winds 20 to 30 knots backing southwest late. Waves building to 8 to 11 feet occasionally to 14 feet, then subsiding to 6 to 9 feet occasionally to 11 feet. .SATURDAY NIGHT...Southwest winds 15 to 25 knots increasing to 20 to 30 knots after midnight. Waves subsiding to 4 to 7 feet occasionally to 9 feet, then building to 7 to 10 feet occasionally to 13 feet. .SUNDAY...Southwest winds 20 to 30 knots. Waves building to 9 to 12 feet occasionally to 15 feet, then subsiding to 7 to 10 feet occasionally to 13 feet. .SUNDAY NIGHT...Southwest winds 15 to 25 knots diminishing to 10 to 20 knots after midnight. Waves subsiding to 2 to 4 feet. .MONDAY...West winds 5 to 15 knots veering north by mid afternoon. Waves subsiding to calm to 2 feet. .MONDAY NIGHT...East winds less than 10 knots increasing to 5 to 15 knots after midnight. Waves calm to 2 feet. .TUESDAY...Southeast winds 5 to 15 knots veering south. Waves calm to 2 feet. .WEDNESDAY...South winds 10 to 20 knots increasing to 15 to 25 knots. Waves building to 2 to 4 feet, then subsiding to 1 to 3 feet. $$ LSZ267-170800- Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off shore to the US/Canadian border- 1001 PM EDT Fri Oct 16 2026 .REST OF TONIGHT...North winds 20 to 30 knots diminishing to 15 to 25 knots after midnight, then becoming west 10 to 20 knots late. Waves 6 to 9 feet occasionally to 11 feet subsiding to 2 to 4 feet. .SATURDAY...West winds 15 to 25 knots becoming southwest 20 to 30 knots in the afternoon, then diminishing to 15 to 25 knots late. Waves building to 4 to 7 feet occasionally to 9 feet, then subsiding to 3 to 6 feet occasionally to 8 feet. .SATURDAY NIGHT...Southwest winds 15 to 25 knots increasing to 30 knots with a few gale force gusts to 35 knots possible. Waves building to 5 to 8 feet occasionally to 10 feet. .SUNDAY...Southwest gales to 35 knots diminishing to 20 to 30 knots by mid afternoon. Waves building to 6 to 9 feet occasionally to 11 feet, then subsiding to 3 to 6 feet occasionally to 8 feet. .SUNDAY NIGHT...Southwest winds 20 to 30 knots diminishing to 15 to 25 knots after midnight. Waves subsiding to 2 to 4 feet. .MONDAY...Southwest winds 5 to 15 knots veering west by mid afternoon. Waves subsiding to calm to 2 feet. .MONDAY NIGHT...Northwest winds 5 to 15 knots veering east after midnight. Waves calm to 2 feet. .TUESDAY...East winds 5 to 15 knots veering southeast. Waves calm to 2 feet. .WEDNESDAY...South winds 10 to 20 knots increasing to 15 to 25 knots. Waves building to 1 to 3 feet. $$ LSZ261-170800- MAFOR 1703/ Superior West 11710 11620 12540 11550 13540. Waves 1 to 3 feet overnight. Waves 3 to 6 feet building to 6 to 10 feet Saturday. Waves 4 to 7 feet subsiding to 3 to 6 feet Saturday evening. Superior North Central 11720 11610 11630 11640 12650 11640 11540. Waves 3 to 5 feet subsiding to 2 to 3 feet overnight. Waves 3 to 6 feet building to 8 to 11 feet Saturday. Waves 7 to 10 feet subsiding to 5 to 8 feet Saturday evening. Superior South Central 11730 11710 11630 13640 12530. Waves 5 to 8 feet subsiding to 3 to 5 feet overnight. Waves 2 to 4 feet building to 3 to 6 feet Saturday. Waves 2 to 4 feet Saturday evening. Superior East 11830 11710 11620 12630 13530. Waves 5 to 8 feet subsiding to 3 to 5 feet overnight. Waves 3 to 6 feet building to 5 to 7 feet Saturday. Waves 4 to 7 feet Saturday evening. $$ 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  490 FZUS63 KMKX 170251 GLFLM OPEN LAKE FORECAST for Lake Michigan National Weather Service Milwaukee/Sullivan WI 951 PM CDT Fri Oct 16 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... Low pressure around 29.4 inches will continue to move well east of the region tonight, as strong high pressure around 30.6 inches remains over the Central Plains. North gales are expected to linger over the next few hours over the southern half of Lake Michigan, quickly tapering off into early Saturday morning. A Gale Warning remains in effect for all of the open waters of Lake Michigan until 1 AM CDT Saturday morning. Scattered showers will linger into early Saturday morning over the southern half of Lake Michigan. A few rumbles of thunder and some isolated waterspout potential will reamin over the south half of Lake Michigan. As the high shifts toward the Ohio River Valley on Saturday, strong low pressure around 29.0 inches will develop in south central Canada, shifting toward and into Hudson Bay on Sunday. This may bring southwest gales to far northern portions of Lake Michigan Saturday night into Sunday night. High pressure around 30.5 inches should develop east northeast of the region next week, bringing dry conditions and light to modest winds. LMZ261-362-364-366-563-565-567-868-170930- 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- 951 PM CDT Fri Oct 16 2026 SHEBOYGAN WI TO PENTWATER MI NORTH... ...GALE WARNING IN EFFECT UNTIL 1 AM CDT SATURDAY... .REST OF TONIGHT...North gales to 35 kt becoming northwest 10 to 20 kt. Waves 10 to 14 ft occasionally to 18 ft subsiding to 4 to 7 ft occasionally to 9 ft. .SATURDAY...West winds 10 to 20 kt increasing to 15 to 25 kt late in the morning, then becoming southwest to 30 kt in the afternoon. Waves 3 to 5 ft building to 5 to 8 ft occasionally to 10 ft. .SATURDAY NIGHT...Southwest gales to 35 kt. Waves 6 to 9 ft occasionally to 12 ft building to 8 to 11 ft occasionally to 14 ft. .SUNDAY...Southwest gales to 40 kt. Waves 10 to 14 ft occasionally to 18 ft. .SUNDAY NIGHT...Southwest gales to 40 kt diminishing to gales to 35 kt. Waves 8 to 12 ft occasionally to 16 ft subsiding to 7 to 10 ft occasionally to 13 ft. .MONDAY...Southwest winds 15 to 25 kt diminishing to 10 to 20 kt. Waves 4 to 6 ft occasionally to 8 ft subsiding to 2 to 4 ft. .MONDAY NIGHT...Southwest winds 10 to 15 kt diminishing to less than 10 kt. Waves 1 to 3 ft. .TUESDAY...Southeast winds 5 to 10 kt. Waves 1 ft or less. .WEDNESDAY...South winds 10 to 15 kt. Waves 1 to 2 ft. $$ LMZ080-669-671-673-675-777-779-870-872-874-876-878-170930- 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 WindPoint 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- 951 PM CDT Fri Oct 16 2026 SHEBOYGAN WI TO PENTWATER MI SOUTH... ...GALE WARNING IN EFFECT UNTIL 1 AM CDT SATURDAY... .REST OF TONIGHT...North gales to 40 kt diminishing to 15 to 25 kt. Slight chance of waterspouts. Scattered rain showers late this evening, then isolated rain showers overnight. Waves 15 to 20 ft occasionally to 26 ft subsiding to 8 to 12 ft occasionally to 16 ft. .SATURDAY...North winds 10 to 20 kt backing to southwest 15 to 25 kt. Waves 6 to 9 ft occasionally to 12 ft subsiding to 3 to 5 ft. .SATURDAY NIGHT...Southwest winds 15 to 25 kt increasing to 30 kt. Waves 4 to 7 ft occasionally to 9 ft building to 6 to 9 ft occasionally to 12 ft. .SUNDAY...Southwest winds to 30 kt increasing to gales to 35 kt. Waves 8 to 12 ft occasionally to 16 ft. .SUNDAY NIGHT...South winds to 30 kt becoming southwest 15 to 25 kt. Waves 8 to 11 ft occasionally to 14 ft subsiding to 5 to 8 ft occasionally to 10 ft. .MONDAY...Southwest winds 10 to 20 kt becoming south. Waves 3 to 5 ft subsiding to 2 to 4 ft. .MONDAY NIGHT...South winds 10 to 15 kt diminishing to less than 10 kt. Waves 1 to 2 ft. .TUESDAY...East winds 5 to 10 kt diminishing to less than 10 kt. Waves 1 ft or less. .WEDNESDAY...Southeast winds 10 to 15 kt. Waves 1 to 2 ft. $$ LMZ761-170930- MAFOR 1704/ MICHIGAN NORTH...GALE WARNING IN EFFECT...11840 11720 11710 11630 12540 11550 11540. Waves 7 to 11 feet subsiding to 4 to 7 feet overnight. Waves 2 to 4 feet building to 4 to 7 feet Saturday. Waves 5 to 8 feet Saturday evening. MICHIGAN SOUTH...GALE WARNING IN EFFECT...11840 11830 11820 11810 11520 13530. Waves 12 to 17 feet subsiding to 9 to 12 feet overnight. Waves 5 to 8 feet subsiding to 3 to 5 feet Saturday. Waves 3 to 6 feet building to 4 to 7 feet Saturday evening. $$ CMiller Experimental modernized open lake forecast is available online at weather.gov/mkx/glftable Graphical marine forecasts are available online at: weather.gov/greatlakes