Great Lakes Forecast
Issued by NWS
Issued by NWS
074 FZUS61 KBUF 081402 GLFLO Open Lake Forecast for Lake Ontario National Weather Service Buffalo NY 1002 AM EDT Tue Sep 8 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 30.2 inch high extending over the region will drift to the eastern seaboard today. Meanwhile, a 29.3 inch low over far northwest Ontario province will move to Hudson Bay by late Wednesday, then to northern Quebec by Thursday while deepening to 29.0 inches. A trailing cold front will cross the lower Great Lakes Wednesday night, followed by a 30.0 inch high building east across the eastern Great Lakes region Thursday through Friday, before sliding east into New England by Saturday. LOZ062-082100- Lake Ontario open waters from the Niagara River to Hamlin Beach- 1002 AM EDT Tue Sep 8 2026 .THIS AFTERNOON...Light and variable winds. Waves 1 foot or less. .TONIGHT...East winds 5 to 10 knots becoming south. Waves 1 foot or less. .WEDNESDAY...South winds 5 to 15 knots becoming southwest 15 to 20 knots. A chance of showers in the morning, then showers with a chance of thunderstorms in the afternoon. Waves 1 to 3 feet building to 3 to 5 feet. .WEDNESDAY NIGHT...Southwest winds 15 to 25 knots becoming west and diminishing to 10 to 15 knots. Showers with a chance of thunderstorms in the evening, then showers likely overnight. Waves 3 to 6 feet. .THURSDAY...West winds 10 to 15 knots becoming northwest. Waves 2 to 4 feet subsiding to 1 to 3 feet. .FRIDAY...North winds 10 knots or less becoming south. Waves 2 feet or less. .SATURDAY...South winds 5 to 10 knots becoming southwest. Waves 1 foot or less. Winds and waves higher in and near thunderstorms. $$ LOZ063>065-082100- Lake Ontario open waters from Hamlin Beach to the Saint Lawrence River- 1002 AM EDT Tue Sep 8 2026 .THIS AFTERNOON...West winds less than 10 knots becoming southwest. Waves 1 foot or less. .TONIGHT...Southeast winds 10 knots or less becoming south 10 to 15 knots. Waves 2 feet or less. .WEDNESDAY...South winds 15 to 20 knots becoming southwest. A chance of showers in the morning, then showers with a chance of thunderstorms in the afternoon. Waves 1 to 3 feet. .WEDNESDAY NIGHT...Southwest winds 15 to 25 knots becoming west. Showers with a chance of thunderstorms in the evening, then showers overnight. Waves 3 to 6 feet. .THURSDAY...West winds 15 to 20 knots becoming north. Waves 3 to 6 feet. .FRIDAY...North winds 10 knots or less becoming south. Waves 1 to 3 feet subsiding to 1 foot or less. .SATURDAY...South winds 10 to 15 knots becoming southwest 15 to 20 knots. Waves 1 to 3 feet. Winds and waves higher in and near thunderstorms. $$ LOZ061-082100- MAFOR 0815/ ONTARIO WEST 1/2 11600 12200 12300 12400 11510. A chance of showers Wednesday morning. Waves 2 feet or less. ONTARIO EAST 1/2 12600 11400 12300 13410. A chance of showers Wednesday morning. Waves 2 feet or less this afternoon and tonight. Waves 1 to 3 feet Wednesday morning. $$