FZUS61 KBUF 161403 GLFLO Open Lake Forecast for Lake Ontario National Weather Service Buffalo NY 1003 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 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. LOZ062-162100- Lake Ontario open waters from the Niagara River to Hamlin Beach- 1003 AM EDT Fri Oct 16 2026 .REST OF TODAY...West winds 15 to 20 knots becoming northwest and increasing to 30 knots. Periods of rain late this morning, then a chance of showers this afternoon. Waves 3 to 5 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. $$ LOZ063>065-162100- Lake Ontario open waters from Hamlin Beach to the Saint Lawrence River- 1003 AM EDT Fri Oct 16 2026 .REST OF TODAY...Southwest winds 15 to 25 knots becoming west to 30 knots. Periods of rain, then a chance of showers late. Waves 5 to 8 feet. Waves occasionally around 10 feet. .TONIGHT...Northwest winds 20 to 25 knots becoming north. A chance of showers early. Waves 5 to 8 feet. Waves occasionally around 10 feet. .SATURDAY...North winds 15 to 25 knots becoming northwest and diminishing to 10 to 15 knots. Waves 5 to 8 feet subsiding to 1 to 3 feet. Waves occasionally around 10 feet. .SATURDAY NIGHT...Northwest winds 10 to 15 knots becoming southwest. Waves 1 to 3 feet. .SUNDAY...Southwest winds 10 to 15 knots becoming south. Waves 2 to 4 feet subsiding to 1 to 3 feet. .MONDAY...South winds 5 to 15 knots becoming west less than 10 knots. Waves 1 to 3 feet subsiding to 1 foot or less. .TUESDAY...North winds 10 knots or less becoming northeast. Waves 1 foot or less. $$ LOZ061-162100- MAFOR 1615/ ONTARIO WEST 1/2 11636 11640 12730 13830 11820. A chance of showers this afternoon. Waves 3 to 5 feet building to 5 to 8 feet, and occasionally around 10 feet this afternoon. Waves 5 to 8 feet, and occasionally around 10 feet tonight. Waves 4 to 7 feet subsiding to 3 to 6 feet, and occasionally around 9 feet Saturday morning. ONTARIO EAST 1/2 11536 11630 12730 14830. Waves 5 to 8 feet, and occasionally around 8 feet. $$