FZUS61 KBUF 021410 GLFLO Open Lake Forecast for Lake Ontario National Weather Service Buffalo NY 1010 AM EDT Thu Apr 2 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 30.7 inch high will build east across Quebec today. A 29.6 inch low will move across the central Great Lakes tonight and to southern Quebec Friday afternoon, while lifting a warm front northward across the lake tonight. A 29.4 inch surface low will track through the central Great Lakes Saturday, then into Quebec Saturday night and Sunday, while dragging a cold front across the lake Saturday night, with a secondary cold front then following Sunday night and Monday. A 30.5 inch high will then build across the Great Lakes Tuesday and Tuesday night, before sliding east and off the New England coast Wednesday. LOZ062-022100- Lake Ontario open waters from the Niagara River to Hamlin Beach- 1010 AM EDT Thu Apr 2 2026 .REST OF TODAY...East winds 20 to 25 knots. A chance of rain showers late this morning, then rain showers likely this afternoon. Waves 5 to 8 feet. Waves occasionally around 10 feet. .TONIGHT...East winds 15 to 20 knots becoming southwest. A chance of rain showers in the evening, then rain showers after midnight. Waves 4 to 7 feet subsiding to 3 to 5 feet. Waves occasionally around 9 feet. .FRIDAY...South winds 15 to 25 knots becoming west. A chance of showers in the morning. Waves 3 to 6 feet building to 4 to 7 feet. Waves occasionally around 9 feet. .FRIDAY NIGHT...West winds 15 to 20 knots becoming northeast 5 to 15 knots. Waves 3 to 6 feet subsiding to 1 to 3 feet. .SATURDAY...East winds 15 to 20 knots becoming southwest. Rain showers. Waves 2 to 4 feet building to 3 to 5 feet. .SUNDAY...West winds 20 to 25 knots. Rain showers likely during the day. Waves 5 to 8 feet. Waves occasionally around 10 feet. .MONDAY...West winds 15 to 25 knots becoming north 15 to 20 knots. Waves 4 to 7 feet subsiding to 1 to 3 feet. Waves occasionally around 9 feet. $$ LOZ063>065-022100- Lake Ontario open waters from Hamlin Beach to the Saint Lawrence River- 1010 AM EDT Thu Apr 2 2026 .REST OF TODAY...East winds 15 to 20 knots. Rain showers likely this afternoon. Waves 3 to 6 feet. .TONIGHT...East winds 15 to 25 knots becoming south to 30 knots. A chance of showers through the early overnight, then showers likely late. Waves 3 to 5 feet building to 5 to 8 feet. Waves occasionally around 10 feet. .FRIDAY...South winds to 30 knots becoming southwest. Showers likely in the morning, then a chance of showers in the afternoon. Waves 5 to 8 feet subsiding to 3 to 6 feet. Waves occasionally around 10 feet. .FRIDAY NIGHT...West winds 15 to 20 knots becoming north 5 to 15 knots. Waves 3 to 6 feet subsiding to 1 to 3 feet. .SATURDAY...Northeast winds 10 to 15 knots becoming southwest and increasing to 15 to 25 knots. Rain showers likely during the day, then rain showers with a chance of thunderstorms Saturday night. Waves 1 to 3 feet building to 3 to 6 feet. .SUNDAY...West winds to 30 knots. Rain showers during the day. Waves 4 to 7 feet building to 6 to 10 feet. Waves occasionally around 13 feet. .MONDAY...West winds 15 to 25 knots becoming north. Waves 6 to 9 feet subsiding to 2 to 4 feet. Waves occasionally around 11 feet. Winds and waves higher in and near thunderstorms. $$ LOZ061-022100- MAFOR 0215/ ONTARIO WEST 1/2 12236 11230 11220 11420 11526 11430 11530. Waves 5 to 8 feet, and occasionally around 10 feet this afternoon. Waves 4 to 7 feet subsiding to 3 to 5 feet, and occasionally around 9 feet tonight. Waves 3 to 6 feet Friday morning. ONTARIO EAST 1/2 11220 11226 11220 11330 11340 12440 11430. Waves 3 to 5 feet this afternoon. Waves 3 to 5 feet building to 5 to 8 feet, and occasionally around 10 feet tonight. Waves 5 to 8 feet, and occasionally around 10 feet Friday morning. $$