FZUS61 KBUF 140802 GLFLO Open Lake Forecast for Lake Ontario National Weather Service Buffalo NY 402 AM EDT Sun Jun 14 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 29.4 inch low will send a cold through the Lower Lakes today. Following the passage of the front, a 29.9 inch high which will build across the region through Monday, then exit off to our northeast Tuesday while weakening to 29.8 inches. A 29.4 inch low will then track north of the lake on Wednesday, with its trailing cold front approaching the lake late in the day on Wednesday. A second 29.4 inch surface low will pass across the upper Great Lakes Thursday, with a warm front, followed by a cold front to sweep across the lake throughout the day. LOZ062-141500- Lake Ontario open waters from the Niagara River to Hamlin Beach- 402 AM EDT Sun Jun 14 2026 .TODAY...Southwest winds 5 to 15 knots becoming west. A chance of showers early, then showers with a chance of thunderstorms from late morning on. Waves 1 to 2 feet. .TONIGHT...West winds 10 to 15 knots increasing to 15 to 20 knots. A chance of showers early. Waves 2 feet or less building to 3 to 5 feet. .MONDAY...West winds 15 to 20 knots becoming southwest 10 to 15 knots. Waves 3 to 5 feet subsiding to 1 to 3 feet. .MONDAY NIGHT...Southwest winds 10 to 15 knots. Waves 1 to 2 feet. .TUESDAY...Southwest winds 10 to 15 knots becoming south. A chance of showers Tuesday night. Waves 1 to 3 feet. .WEDNESDAY...South winds 10 to 15 knots becoming southeast 15 to 20 knots. A chance of showers during the day, then showers Wednesday night. Waves 1 to 3 feet. .THURSDAY...South winds to 30 knots becoming west. Showers during the day, then a chance of showers Thursday night. Waves 5 to 8 feet building to 7 to 10 feet, then subsiding to 5 to 8 feet. Waves occasionally around 13 feet. Winds and waves higher in and near thunderstorms. $$ LOZ063>065-141500- Lake Ontario open waters from Hamlin Beach to the Saint Lawrence River- 402 AM EDT Sun Jun 14 2026 .TODAY...Southwest winds 5 to 15 knots becoming northeast. A chance of showers and thunderstorms late this morning. Showers with a chance of thunderstorms this afternoon. Waves 2 feet or less. .TONIGHT...Northwest winds 10 to 15 knots becoming west 15 to 20 knots. Showers with a chance of thunderstorms early, then a chance of showers late in the evening. Waves 1 to 3 feet building to 3 to 6 feet. .MONDAY...West winds 15 to 20 knots. Waves 3 to 6 feet. .MONDAY NIGHT...West winds 15 to 20 knots becoming southwest 10 to 15 knots. Waves 3 to 5 feet subsiding to 1 to 3 feet. .TUESDAY...Southwest winds 5 to 15 knots becoming south. Waves 2 feet or less. .WEDNESDAY...South winds 5 to 15 knots increasing to 15 to 20 knots. Showers likely. Waves 2 feet or less building to 2 to 4 feet. .THURSDAY...South winds to 30 knots becoming west. Showers during the day, then a chance of showers Thursday night. Waves 5 to 8 feet building to 7 to 10 feet. Waves occasionally around 13 feet. Winds and waves higher in and near thunderstorms. $$ LOZ061-141500- MAFOR 1409/ ONTARIO WEST 1/2 12500 11616 11716 11500 11710 11720 11620. A chance of thunderstorms today. Waves 1 to 3 feet subsiding to 1 foot or less today. Waves 1 foot or less building to 3 to 5 feet tonight. ONTARIO EAST 1/2 11510 11500 11600 11106 11816 11610 12620. A chance of thunderstorms this afternoon and evening. Waves 2 feet or less today. Waves 1 to 3 feet building to 3 to 5 feet tonight. $$