FZUS61 KBUF 010810 GLFLO Open Lake Forecast for Lake Ontario National Weather Service Buffalo NY 409 AM EDT Wed Apr 1 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 29.9 inch area of low pressure near northern New England this morning will continue to drift eastward, with its associated frontal boundary stalling near the Mason Dixon line. A 30.6 inch high will then build east across Ontario and Quebec today through Thursday. A 29.6 inch low is then forecast to move into the central Great Lakes Thursday night before reaching southern Quebec late Friday, lifting the frontal boundary to the south back northward over the Lake Thursday evening. A 29.4 inch surface low will then track through the Central Great Lakes Saturday. LOZ062-011500- Lake Ontario open waters from the Niagara River to Hamlin Beach- 409 AM EDT Wed Apr 1 2026 .TODAY...Northwest winds 5 to 15 knots becoming north. Waves 2 feet or less. .TONIGHT...Northeast winds 5 to 15 knots becoming east 15 to 20 knots. A chance of rain showers late. Waves 2 feet or less building to 4 to 6 feet. .THURSDAY...East winds 15 to 25 knots. Rain showers likely. Waves 5 to 7 feet. Waves occasionally around 9 feet. .THURSDAY NIGHT...East winds 15 to 20 knots becoming south. Rain showers likely. Waves 3 to 6 feet subsiding to 2 to 4 feet. .FRIDAY...Southwest winds 15 to 25 knots becoming north and diminishing to 5 to 10 knots. Rain showers likely during the day, then a chance of rain showers Friday night. Waves 3 to 6 feet subsiding to 1 to 3 feet. .SATURDAY...East winds 10 to 15 knots becoming southwest 15 to 20 knots. Rain showers. Waves 1 to 3 feet building to 3 to 6 feet. .SUNDAY...West winds 20 to 25 knots. Rain showers during the day. Waves 5 to 8 feet. Waves occasionally around 10 feet. $$ LOZ063>065-011500- Lake Ontario open waters from Hamlin Beach to the Saint Lawrence River- 409 AM EDT Wed Apr 1 2026 .TODAY...Northwest winds 5 to 15 knots becoming northeast. Waves 2 feet or less. .TONIGHT...Northeast winds 5 to 15 knots increasing to 15 to 20 knots. A chance of rain showers late. Waves 2 feet or less building to 3 to 5 feet. .THURSDAY...Northeast winds 15 to 20 knots becoming east. A chance of rain showers in the morning, then rain showers likely in the afternoon. Waves 3 to 6 feet. .THURSDAY NIGHT...Southeast winds 15 to 25 knots becoming south to 30 knots. Showers likely. Waves 3 to 5 feet building to 4 to 7 feet. Waves occasionally around 9 feet. .FRIDAY...South winds to 30 knots becoming north and diminishing to 5 to 10 knots. Rain showers likely during the day, then a chance of rain showers Friday night. Waves 4 to 7 feet subsiding to 2 to 4 feet. Waves occasionally around 9 feet. .SATURDAY...Northeast winds 5 to 15 knots becoming southwest and increasing to 30 knots. A chance of rain showers during the day, then rain showers with a chance of thunderstorms Saturday night. Waves 1 to 3 feet building to 4 to 7 feet. Waves occasionally around 9 feet. .SUNDAY...West winds to 30 knots. Rain showers during the day, then a chance of rain showers Sunday night. Waves 5 to 8 feet building to 7 to 10 feet. Waves occasionally around 13 feet. Winds and waves higher in and near thunderstorms. $$ LOZ061-011500- MAFOR 0109/ ONTARIO WEST 1/2 12710 12800 11100 11210 12120. Waves 2 feet or less today. Waves 2 feet or less building to 3 to 5 feet tonight. ONTARIO EAST 1/2 12710 12800 12100 12120. Waves 2 feet or less today. Waves 2 feet or less building to 2 to 4 feet tonight. $$