Expires:202506140315;;187391 FZUS61 KBUF 132012 GLFLO Open Lake Forecast for Lake Ontario National Weather Service Buffalo NY 412 PM EDT Fri Jun 13 2025 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 frontal boundary will remain stalled south of the lower Great Lakes tonight through Monday. Meanwhile, a 30.3 inch high will build from northern Ontario province tonight, to southern Quebec Saturday, then into the Canadian Maritimes by late Sunday. A weak 29.9 inch low will move from the Ohio Valley Sunday to the Mid Atlantic Monday, then another weak 29.8 inch low will slide east across the upper Great Lakes Tuesday. Another 29.5 inch may move across the Upper Great Lakes Wednesday. LOZ062-140315- Lake Ontario open waters from the Niagara River to Hamlin Beach- 412 PM EDT Fri Jun 13 2025 .TONIGHT...East winds 10 to 15 knots. Waves 1 to 3 feet. .SATURDAY...Northeast winds 10 to 15 knots becoming east. Waves 2 to 4 feet. .SATURDAY NIGHT...East winds 5 to 15 knots becoming northeast. Waves 1 to 3 feet. .SUNDAY...Northeast winds 5 to 15 knots becoming east. Waves 1 to 2 feet. .SUNDAY NIGHT...East winds 5 to 10 knots. Waves 2 feet or less. .MONDAY...East winds 5 to 10 knots becoming south. Waves 1 foot or less. .TUESDAY...South winds 5 to 10 knots becoming southwest. Scattered showers. Waves 2 feet or less. .WEDNESDAY...Southwest winds 10 to 15 knots increasing to 15 to 20 knots. A chance of showers and thunderstorms during the day, then showers likely with a chance of thunderstorms Wednesday night. Waves 1 to 3 feet. Winds and waves higher in and near thunderstorms. $$