FZUS61 KBUF 110211 GLFLO Open Lake Forecast for Lake Ontario National Weather Service Buffalo NY 1010 PM EDT Fri Apr 10 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 30.0 inch surface low over New England this evening will carry a cold front farther east of the Lake, and off the New England coastline tomorrow. A 30.5 inch high will then build over the Great Lakes Saturday, and then drift east to New England by Sunday. A 29.4 inch low will then move from near Lake Superior Sunday night to northern Quebec Monday, with a trailing cold front stalling near the Lake Monday through Tuesday. A 29.6 inch surface low advancing through the Central Great Lakes Wednesday will lift this frontal boundary northward, into Canada, with a trailing cold front from the surface low crossing the Lake Wednesday evening. LOZ062-110900- Lake Ontario open waters from the Niagara River to Hamlin Beach- 1010 PM EDT Fri Apr 10 2026 .REST OF TONIGHT...Northwest winds 10 to 15 knots. Waves 1 to 3 feet. .SATURDAY...Northwest winds 5 to 15 knots becoming southwest. Waves 1 to 3 feet. .SATURDAY NIGHT...Southwest winds 10 knots or less becoming southeast. Waves 2 feet or less. .SUNDAY...Southeast winds 5 to 10 knots becoming east. Rain showers likely. Waves 2 feet or less. .SUNDAY NIGHT...Southeast winds around 10 knots becoming southwest and increasing to 15 to 25 knots overnight. Showers likely in the evening, then a chance of showers overnight. Waves 1 to 3 feet building to 3 to 6 feet. .MONDAY...Southwest winds 15 to 25 knots diminishing to 10 to 15 knots. Showers likely during the day, then a chance of showers Monday night. Waves 4 to 7 feet subsiding to 2 to 3 feet. Waves occasionally around 9 feet. .TUESDAY...Southeast winds 10 to 15 knots becoming southwest 15 to 20 knots. A chance of showers during the day, then showers likely Tuesday night. Waves 1 to 3 feet building to 2 to 4 feet. .WEDNESDAY...Southwest winds 15 to 25 knots. Showers likely. Waves 3 to 5 feet. $$ LOZ063>065-110900- Lake Ontario open waters from Hamlin Beach to the Saint Lawrence River- 1010 PM EDT Fri Apr 10 2026 .REST OF TONIGHT...Northwest winds 10 to 15 knots. A chance of rain showers late this evening. Waves 1 to 3 feet. .SATURDAY...Northwest winds 10 to 15 knots becoming west. Waves 1 to 3 feet. .SATURDAY NIGHT...West winds 5 to 15 knots becoming south less than 10 knots. Waves 1 to 3 feet subsiding to 1 foot or less. .SUNDAY...Southeast winds 5 to 15 knots. A chance of rain showers in the morning, then rain showers likely in the afternoon. Waves 2 feet or less. .SUNDAY NIGHT...Southeast winds 15 to 25 knots becoming south. Showers likely. Waves 2 to 4 feet building to 3 to 6 feet. .MONDAY...Southwest winds 15 to 25 knots becoming west and diminishing to 10 to 15 knots. Showers likely during the day, then a chance of showers Monday night. Waves 3 to 6 feet building to 4 to 7 feet, then subsiding to 2 to 4 feet. Waves occasionally around 9 feet. .TUESDAY...East winds 10 to 15 knots becoming south 15 to 20 knots. A chance of showers during the day, then showers likely with a chance of thunderstorms Tuesday night. Waves 1 to 3 feet. .WEDNESDAY...South winds 15 to 20 knots becoming southwest. Showers likely. Waves 2 to 4 feet building to 3 to 5 feet. Winds and waves higher in and near thunderstorms. $$ LOZ061-110900- MAFOR 1103/ ONTARIO WEST 1/2 14710 12610 11500 11600. Waves 1 to 3 feet overnight and Saturday. Waves 2 feet or less Saturday evening. ONTARIO EAST 1/2 14710 13610 11600. Waves 1 to 3 feet. $$