


Great Lakes Forecast
Issued by NWS
Issued by NWS
248 FZUS61 KBUF 130802 GLFLO Open Lake Forecast for Lake Ontario National Weather Service Buffalo NY 402 AM 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 30.2 inch high will drift slowly east off the New England coast through this afternoon. A frontal boundary will remain stalled south of the lower Great Lakes today through Monday. Meanwhile, a 30.3 inch high will build from northern Ontario province today, 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. LOZ062-131500- Lake Ontario open waters from the Niagara River to Hamlin Beach- 402 AM EDT Fri Jun 13 2025 .TODAY...East winds 10 to 15 knots increasing to 15 to 20 knots. Waves 2 to 4 feet. .TONIGHT...East winds 10 to 15 knots. Waves 1 to 3 feet. .SATURDAY...East winds 10 to 15 knots. Waves 1 to 3 feet. .SATURDAY NIGHT...East winds 5 to 10 knots becoming northeast. Waves 1 to 2 feet. .SUNDAY...East winds 5 to 10 knots. Waves 1 to 3 feet. .MONDAY...East winds 5 to 10 knots becoming southwest. Waves around 1 foot. .TUESDAY...South winds 5 to 10 knots. A chance of showers Tuesday night. Waves 2 feet or less. $$ LOZ063>065-131500- Lake Ontario open waters from Hamlin Beach to the Saint Lawrence River- 402 AM EDT Fri Jun 13 2025 .TODAY...Northeast winds 5 to 15 knots. Waves 1 to 3 feet. .TONIGHT...Northeast winds 5 to 15 knots. A chance of showers late. Waves 1 to 3 feet. .SATURDAY...Northeast winds 5 to 15 knots. Waves 1 to 3 feet. .SATURDAY NIGHT...Northeast winds 5 to 10 knots becoming east. Waves 2 feet or less. .SUNDAY...East winds 5 to 10 knots becoming southeast. Waves 2 feet or less. .MONDAY...Southeast winds 5 to 10 knots becoming south. Waves 1 foot or less. .TUESDAY...South winds 5 to 10 knots. A chance of showers Tuesday night. Waves 2 feet or less. $$ LOZ061-131500- MAFOR 1309/ ONTARIO WEST 1/2 11110 15210 11110. Waves 2 to 4 feet today. Waves 1 to 3 feet tonight. ONTARIO EAST 1/2 12110 14100 12110. Waves 1 to 3 feet. $$