725 FZUS61 KBUF 150202 GLFLO Open Lake Forecast for Lake Ontario National Weather Service Buffalo NY 1002 PM EDT Wed Oct 14 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 30.4 inch high, centered just north of the Great Lakes tonight, will move east across Quebec and New England Thursday through Thursday night. A 29.6 inch low will then move to southern lower Michigan Thursday night before passing over or just north of the lake Friday. This low will deepen to 29.1 inches as it moves from the Saint Lawrence Valley Friday night to the Canadian Maritimes Saturday. A strong and broad 30.6 inch surface high is then forecast to build from the Ohio Valley Saturday night to the Mid Atlantic and southern New England areas by Sunday night, and across southern Atlantic Canada Monday. LOZ062-150900- Lake Ontario open waters from the Niagara River to Hamlin Beach- 1002 PM EDT Wed Oct 14 2026 .OVERNIGHT...North winds 15 to 20 knots becoming northeast 10 to 15 knots. Waves 1 to 3 feet. .THURSDAY...Northeast winds 10 to 15 knots becoming east 15 to 20 knots. Waves 2 to 4 feet. .THURSDAY NIGHT...East winds 15 to 20 knots diminishing to 10 to 15 knots. Showers likely in the evening, then showers overnight. Waves 3 to 5 feet subsiding to 2 to 4 feet. .FRIDAY...East winds around 10 knots becoming northwest and increasing to 15 to 25 knots in the afternoon. Showers. Waves 2 to 4 feet building to 3 to 5 feet. .FRIDAY NIGHT...Northwest winds to 30 knots becoming north. A chance of showers in the evening. Waves 4 to 7 feet. Waves occasionally around 9 feet. .SATURDAY...Northwest winds 15 to 25 knots becoming west. Waves 4 to 7 feet subsiding to 3 to 5 feet. Waves occasionally around 9 feet. .SUNDAY...Southwest winds 15 to 20 knots. Waves 3 to 5 feet. .MONDAY...Southwest winds 15 to 20 knots diminishing to 5 to 15 knots. Waves 2 to 4 feet subsiding to 1 to 3 feet. $$ LOZ063>065-150900- Lake Ontario open waters from Hamlin Beach to the Saint Lawrence River- 1002 PM EDT Wed Oct 14 2026 .OVERNIGHT...North winds 15 to 20 knots. Waves 2 to 4 feet subsiding to 1 to 3 feet. .THURSDAY...Northeast winds 15 to 20 knots diminishing to 5 to 15 knots. Waves 2 to 4 feet subsiding to 1 to 3 feet. .THURSDAY NIGHT...East winds 10 to 15 knots becoming southeast and increasing to 15 to 25 knots. A chance of showers in the evening, then showers overnight. Waves 1 to 3 feet building to 3 to 5 feet. .FRIDAY...Southeast winds 15 to 25 knots becoming northwest. Showers. Waves 3 to 6 feet. .FRIDAY NIGHT...Northwest winds to 30 knots becoming north. Showers likely in the evening, then a chance of showers overnight. Waves 5 to 8 feet. Waves occasionally around 10 feet. .SATURDAY...Northwest winds to 30 knots becoming west and diminishing to 15 to 20 knots. Waves 5 to 8 feet subsiding to 3 to 6 feet. Waves occasionally around 10 feet. .SUNDAY...Southwest winds 15 to 20 knots. Waves 3 to 5 feet subsiding to 2 to 4 feet. .MONDAY...Southwest winds 15 to 20 knots diminishing to 5 to 10 knots. Waves 2 to 4 feet subsiding to 1 to 3 feet. $$ LOZ061-150900- MAFOR 1503/ ONTARIO WEST 1/2 12810 12110 11210 13220. Waves 1 to 3 feet overnight. Waves 2 to 4 feet Thursday. Waves 3 to 5 feet Thursday evening. ONTARIO EAST 1/2 12810 12110 12100 11110 11210. Waves 2 to 4 feet subsiding to 1 to 3 feet overnight and Thursday. Waves 1 to 3 feet Thursday evening. $$  764 FZUS61 KBUF 150203 GLFSL Forecast for the Saint Lawrence River including the Thousand Islands Region National Weather Service Buffalo NY 1003 PM EDT Wed Oct 14 2026 SLZ022-024-150900- Saint Lawrence River from Cape Vincent to Saint Regis 1003 PM EDT Wed Oct 14 2026 .OVERNIGHT...Northwest winds 5 to 10 knots becoming north. Partly to mostly cloudy. .THURSDAY...North winds 10 knots or less becoming northeast. Partly to mostly sunny. .THURSDAY NIGHT...Northeast winds 10 knots or less becoming east. Rain showers overnight. .FRIDAY...East winds 5 to 15 knots becoming northwest. Showers. .FRIDAY NIGHT...Northwest winds 10 to 15 knots increasing to 15 to 20 knots. Rain showers in the evening, then a chance of rain showers overnight. .SATURDAY...Northwest winds 5 to 15 knots becoming west less than 10 knots. Partly cloudy. .SUNDAY...Southwest winds 5 to 15 knots. Mainly clear. .MONDAY...Southwest winds 5 to 15 knots diminishing to less than 10 knots. Mainly clear, then becoming partly cloudy. $$  732 FZUS63 KMKX 150202 GLFLM OPEN LAKE FORECAST for Lake Michigan National Weather Service Milwaukee/Sullivan WI 902 PM CDT Wed Oct 14 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... Winds will gradually become easterly tonight into Thursday as high pressure around 30.3 inches slides through the region. The stronger winds are expected across the southern half of the lake during this time. Then two areas of low pressure are progged to merge over the Great Lakes region into a single low pressure for Thursday and deepen to around 29.5 inches as it shifts into the eastern Great Lakes later Thursday through Friday. Expect a northwesterly wind shift to ramp up and increase to gales and nearing storm force at times on the backside of the departing low pressure while a strong high pressure around 30.7 inches builds to the west. Thus will maintain a Gale Watch for all the open waters of Lake Michigan Friday morning into Friday night. As the high sinks toward the Ohio River Valley on Saturday, strong low pressure around 29.1 inches will develop in northern Manitoba. The tight pressure gradient may bring southwest gales to Lake Michigan on Sunday. LMZ261-362-364-366-563-565-567-868-150930- 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- 902 PM CDT Wed Oct 14 2026 SHEBOYGAN WI TO PENTWATER MI NORTH... ...GALE WATCH IN EFFECT FROM FRIDAY MORNING THROUGH LATE FRIDAY NIGHT... .REST OF TONIGHT...North winds 10 to 20 kt becoming east. Waves 2 to 4 ft. .THURSDAY...Southeast winds 10 to 15 kt. Chance of showers in the afternoon. Waves 2 to 4 ft. .THURSDAY NIGHT...East winds 10 to 15 kt becoming northeast late in the evening, then becoming north 15 to 25 kt after midnight and increasing to 30 kt late. Showers. Waves 3 to 5 ft building to 4 to 7 ft occasionally to 9 ft. .FRIDAY...North gales to 35 kt increasing to gales to 45 kt in the afternoon. Rain showers. Waves 7 to 10 ft occasionally to 13 ft building to 12 to 16 ft occasionally to 21 ft. .FRIDAY NIGHT...North gales to 45 kt diminishing to 30 kt overnight. Waves 12 to 16 ft occasionally to 21 ft subsiding to 8 to 12 ft occasionally to 16 ft. .SATURDAY...West winds 15 to 25 kt becoming southwest to 30 kt. Waves 4 to 6 ft occasionally to 8 ft. .SATURDAY NIGHT...Southwest winds to 30 kt increasing to gales to 35 kt. Waves 5 to 8 ft occasionally to 10 ft building to 7 to 10 ft occasionally to 13 ft. .SUNDAY...Southwest gales to 40 kt. Waves 8 to 12 ft occasionally to 16 ft. .MONDAY...Southwest winds 15 to 25 kt diminishing to 10 to 20 kt. Waves 4 to 7 ft occasionally to 9 ft subsiding to 3 to 5 ft. $$ LMZ080-669-671-673-675-777-779-870-872-874-876-878-150930- 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 toWind 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- 902 PM CDT Wed Oct 14 2026 SHEBOYGAN WI TO PENTWATER MI SOUTH... ...GALE WATCH IN EFFECT FROM FRIDAY MORNING THROUGH LATE FRIDAY NIGHT... .REST OF TONIGHT...Northeast winds 10 to 20 kt becoming east. Waves 4 to 6 ft occasionally to 8 ft. .THURSDAY...East winds 10 to 20 kt. Chance of showers in the morning, then showers in the afternoon. Waves 4 to 6 ft occasionally to 8 ft. .THURSDAY NIGHT...East winds 10 to 20 kt backing to northwest 15 to 25 kt after midnight, then increasing to 30 kt late. Showers in the evening, then showers likely overnight. Waves 3 to 5 ft building to 6 to 9 ft occasionally to 12 ft. .FRIDAY...Northwest gales to 35 kt becoming north gales to 45 kt in the afternoon. Showers. Waves 10 to 14 ft occasionally to 18 ft building to 14 to 18 ft occasionally to 23 ft. .FRIDAY NIGHT...North gales to 45 kt diminishing to gales to 35 kt overnight. Chance of rain showers in the evening. Waves 15 to 20 ft occasionally to 26 ft. .SATURDAY...North winds 10 to 20 kt backing to southwest 15 to 25 kt. Waves 7 to 10 ft occasionally to 13 ft subsiding to 4 to 6 ft occasionally to 8 ft. .SATURDAY NIGHT...Southwest winds 15 to 25 kt increasing to 30 kt. Waves 6 to 9 ft occasionally to 12 ft. .SUNDAY...Southwest winds to 30 kt increasing to gales to 40 kt. Waves 8 to 11 ft occasionally to 14 ft building to 8 to 12 ft occasionally to 16 ft. .MONDAY...Southwest winds 10 to 20 kt. Waves 4 to 6 ft occasionally to 8 ft subsiding to 3 to 5 ft. $$ LMZ761-150930- MAFOR 1504/ MICHIGAN NORTH 11120 12210 13310 12216. Waves 1 to 3 feet building to 2 to 4 feet overnight. Waves 1 to 3 feet Thursday and Thursday evening. MICHIGAN SOUTH 11120 13220 11320 12226 11316. Waves 3 to 5 feet overnight and Thursday. Waves 3 to 5 feet subsiding to 2 to 4 feet Thursday evening. $$ Cronce Experimental modernized open lake forecast is available online at weather.gov/mkx/glftable Graphical marine forecasts are available online at: weather.gov/greatlakes