FZUS61 KBUF 071503 GLFLO Open Lake Forecast for Lake Ontario National Weather Service Buffalo NY 1003 AM EST Sat Mar 7 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 29.6 inch low will lift across the upper Great Lakes today, with its trailing cold front crossing the lake tonight. A large 30.1 inch high will then move from the lower Ohio Valley to the Mid Atlantic region Sunday and Monday while ridging north across the lake. A 28.9 inch low may move across James Bay Monday while pressure averages 30.0 inches across the lake Tuesday. LOZ062-063-072200- Lake Ontario open waters from the Niagara River to Sodus Bay- 1003 AM EST Sat Mar 7 2026 .REST OF TODAY...South winds 15 to 25 knots becoming southwest. Patchy fog. A chance of showers late this morning, then showers with a chance of thunderstorms this afternoon. Waves 3 to 6 feet building to 4 to 7 feet. Waves occasionally around 9 feet. .TONIGHT...Southwest winds 15 to 25 knots becoming west. Patchy fog in the evening. Rain showers with a chance of thunderstorms early, then a chance of rain showers late in the evening. Waves 4 to 7 feet subsiding to 3 to 6 feet. Waves occasionally around 9 feet. .SUNDAY...West winds 15 to 25 knots becoming southwest. Waves 3 to 6 feet. .SUNDAY NIGHT...Southwest winds 15 to 25 knots. Waves 3 to 6 feet. .MONDAY...Southwest winds 15 to 25 knots becoming west and diminishing to 10 to 15 knots. Waves 3 to 6 feet subsiding to 1 to 3 feet. .TUESDAY...Northwest winds 5 to 15 knots becoming east and increasing to 15 to 25 knots. Rain showers Tuesday night. Waves 1 to 2 feet building to 4 to 7 feet. Waves occasionally around 9 feet. .WEDNESDAY...East winds to 30 knots becoming northwest. Rain showers during the day, then rain showers with snow showers likely Wednesday night. Waves 5 to 8 feet building to 8 to 11 feet. Waves occasionally around 14 feet. Winds and waves higher in and near thunderstorms. $$ LOZ064-065-072200- Lake Ontario open waters from Sodus Bay to the Saint Lawrence River- 1003 AM EST Sat Mar 7 2026 .REST OF TODAY...South winds 15 to 25 knots. A chance of showers, then showers with a chance of thunderstorms late. Patchy fog late. Waves 3 to 6 feet. .TONIGHT...Southwest winds 15 to 20 knots becoming west. Patchy fog in the evening. Rain showers with a chance of thunderstorms early, then rain showers likely late in the evening. A chance of rain showers after midnight. Waves 3 to 6 feet. .SUNDAY...West winds 15 to 20 knots becoming southwest. Waves 3 to 6 feet subsiding to 2 to 4 feet. .SUNDAY NIGHT...Southwest winds 15 to 20 knots becoming south. Waves 3 to 6 feet subsiding to 2 to 4 feet. .MONDAY...South winds 15 to 20 knots becoming southwest 5 to 15 knots. Waves 2 to 4 feet subsiding to 1 to 3 feet. .TUESDAY...West winds 5 to 10 knots becoming northeast and increasing to 15 to 25 knots. Rain showers Tuesday night. Waves 1 to 3 feet building to 3 to 6 feet. .WEDNESDAY...East winds to 30 knots becoming northwest. Rain showers during the day, then rain showers with snow showers likely Wednesday night. Waves 4 to 7 feet building to 8 to 11 feet. Waves occasionally around 14 feet. Winds and waves higher in and near thunderstorms. $$ LOZ061-072200- MAFOR 0716/ ONTARIO WEST 1/2 11530 11536 11530 11520 14620. A chance of thunderstorms this afternoon. Waves 3 to 6 feet building to 4 to 7 feet, and occasionally around 9 feet this afternoon. Waves 4 to 7 feet subsiding to 3 to 6 feet, and occasionally around 9 feet tonight. Waves 3 to 5 feet Sunday morning. ONTARIO EAST 1/2 11430 11436 12526 11520 13620. A chance of thunderstorms this afternoon and evening. Waves 3 to 6 feet. $$