FZUS61 KBUF 160802 GLFLO Open Lake Forecast for Lake Ontario National Weather Service Buffalo NY 402 AM EDT Tue Jun 16 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 high nosing in over the region will exit off to the east today. A 29.4 inch low will then track north of the lake on Wednesday, with its front moving through late in the day. A deepening surface low will then track across the Great Lakes to southern Quebec Wednesday night and Thursday, while pushing a cold front through the region. The low will then make its way to the Canadian Maritimes Friday, while a 29.9 inch high builds across the upper Great Lakes. LOZ062-161500- Lake Ontario open waters from the Niagara River to Hamlin Beach- 402 AM EDT Tue Jun 16 2026 .TODAY...Southwest winds 10 to 15 knots. Waves 1 to 3 feet. .TONIGHT...South winds 5 to 10 knots. A chance of showers late. Waves 1 to 2 feet. .WEDNESDAY...South winds 5 to 15 knots. A chance of showers. Waves 1 to 2 feet. .WEDNESDAY NIGHT...South winds 5 to 10 knots becoming southeast and increasing to 15 to 20 knots. Showers likely in the evening, then showers overnight. Waves 1 to 2 feet building to 2 to 4 feet. .THURSDAY...Southwest winds to 30 knots becoming west. Showers during the day. Waves 6 to 10 feet subsiding to 4 to 7 feet. Waves occasionally around 13 feet. .FRIDAY...West winds 15 to 25 knots. Waves 4 to 7 feet subsiding to 3 to 6 feet. Waves occasionally around 9 feet. .SATURDAY...West winds 15 to 20 knots diminishing to 10 to 15 knots. Waves 3 to 5 feet subsiding to 2 to 3 feet. $$ LOZ063>065-161500- Lake Ontario open waters from Hamlin Beach to the Saint Lawrence River- 402 AM EDT Tue Jun 16 2026 .TODAY...Southwest winds 5 to 15 knots becoming south. Waves 2 feet or less. .TONIGHT...South winds 5 to 15 knots. A chance of showers late. Waves 2 feet or less. .WEDNESDAY...South winds 5 to 15 knots becoming southeast. A chance of showers in the morning, then showers likely in the afternoon. Waves 2 feet or less. .WEDNESDAY NIGHT...Southeast winds 5 to 15 knots increasing to 15 to 25 knots. Showers likely in the evening, then showers overnight. Waves 2 feet or less building to 3 to 5 feet. .THURSDAY...South winds to 30 knots becoming west. Showers during the day, then a chance of showers Thursday night. Waves 6 to 9 feet building to 8 to 11 feet, then subsiding to 6 to 9 feet. Waves occasionally around 14 feet. .FRIDAY...West winds 20 to 25 knots. Waves 5 to 9 feet subsiding to 4 to 7 feet. Waves occasionally around 11 feet. .SATURDAY...West winds to 30 knots diminishing to 15 to 20 knots. A chance of showers. Waves 5 to 8 feet subsiding to 3 to 5 feet. Waves occasionally around 10 feet. $$ LOZ061-161500- MAFOR 1609/ ONTARIO WEST 1/2 14510 11500 12300 11400. Waves 1 to 3 feet today. Waves 2 feet or less tonight. ONTARIO EAST 1/2 13510 11500 11400 12300 11410. Waves 2 feet or less. $$