FZUS61 KBUF 160802 GLFLO Open Lake Forecast for Lake Ontario National Weather Service Buffalo NY 402 AM EDT Fri Oct 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 29.5 inch low will move across southern Ontario province this morning, then continue to move northeast across the Saint Lawrence Valley this afternoon before reaching the Canadian Maritimes by Saturday while deepening to 29.1 inches. A 30.5 inch high will then build into the Ohio Valley Saturday night before expanding across the lower Great Lakes and New England Sunday through Monday. A broad ridge of high pressure averaging 30.4 inches will remain in place across the Ohio Valley and Great Lakes much of next week. LOZ062-161500- Lake Ontario open waters from the Niagara River to Hamlin Beach- 402 AM EDT Fri Oct 16 2026 .TODAY...Southwest winds 15 to 20 knots becoming northwest and increasing to 30 knots. Periods of rain this morning, then a chance of showers this afternoon. Waves 2 to 4 feet building to 5 to 8 feet. Waves occasionally around 10 feet. .TONIGHT...Northwest winds 20 to 25 knots becoming north. A chance of showers early. Waves 4 to 7 feet. Waves occasionally around 9 feet. .SATURDAY...North winds 15 to 25 knots becoming northwest and diminishing to 10 to 15 knots. Waves 3 to 6 feet subsiding to 1 to 2 feet. .SATURDAY NIGHT...West winds 10 to 15 knots becoming southwest. Waves 1 to 3 feet. .SUNDAY...Southwest winds 10 to 15 knots. Waves 2 to 4 feet subsiding to 1 to 3 feet. .MONDAY...Southwest winds 10 knots or less becoming west. Waves 2 feet or less. .TUESDAY...North winds 10 knots or less becoming northeast. Waves 1 foot or less. $$ LOZ063>065-161500- Lake Ontario open waters from Hamlin Beach to the Saint Lawrence River- 402 AM EDT Fri Oct 16 2026 .TODAY...South winds to 30 knots becoming west. Periods of rain through early afternoon, then a chance of showers late. Waves 5 to 8 feet. Waves occasionally around 10 feet. .TONIGHT...Northwest winds 20 to 25 knots becoming north. A chance of showers early. Waves 5 to 8 feet. Waves occasionally around 10 feet. .SATURDAY...North winds 15 to 25 knots becoming northwest and diminishing to 10 to 15 knots. Waves 5 to 8 feet subsiding to 1 to 3 feet. Waves occasionally around 10 feet. .SATURDAY NIGHT...Northwest winds 10 to 15 knots becoming southwest. Waves 1 to 3 feet. .SUNDAY...Southwest winds 10 to 15 knots becoming south. Waves 2 to 4 feet subsiding to 1 to 3 feet. .MONDAY...South winds 5 to 15 knots becoming west less than 10 knots. Waves 1 to 3 feet subsiding to 1 foot or less. .TUESDAY...North winds 10 knots or less becoming northeast. Waves 1 foot or less. $$ LOZ061-161500- MAFOR 1609/ ONTARIO WEST 1/2 12526 11636 11640 12730 12830. A chance of showers this afternoon. Waves 2 to 4 feet building to 5 to 8 feet, and occasionally around 10 feet today. Waves 5 to 8 feet, and occasionally around 10 feet tonight. ONTARIO EAST 1/2 12436 11536 11630 12730 12830. Waves 3 to 6 feet building to 5 to 8 feet, and occasionally around 10 feet today. Waves 5 to 8 feet, and occasionally around 10 feet tonight. $$