


Great Lakes Forecast
Issued by NWS
Issued by NWS
342 FZUS61 KBUF 162002 GLFLO Open Lake Forecast for Lake Ontario National Weather Service Buffalo NY 402 PM EDT Mon Jun 16 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 today as a weak 29.9 inch low moves from the Ohio Valley to the Mid Atlantic. Another 29.6 inch low will then push northeast across the upper Great Lakes Tuesday, followed by a 29.5 inch low forecast to track across the central Great Lakes and Quebec Wednesday through Thursday. A 30.2 inch high will move into the Great Lakes region Friday. LOZ062-170300- Lake Ontario open waters from the Niagara River to Hamlin Beach- 402 PM EDT Mon Jun 16 2025 .TONIGHT...East winds 5 to 10 knots becoming southeast. Waves around 1 foot. .TUESDAY...Southeast winds 5 to 10 knots becoming east. A chance of showers in the afternoon. Waves 1 foot or less. .TUESDAY NIGHT...Southeast winds 5 to 15 knots becoming southwest. A chance of showers and thunderstorms overnight. Waves 1 to 2 feet. .WEDNESDAY...Southwest winds 5 to 10 knots. A chance of showers and thunderstorms. Waves 1 to 2 feet. .WEDNESDAY NIGHT...Southwest winds 5 to 15 knots. Showers likely with a chance of thunderstorms. Waves 1 to 3 feet. .THURSDAY...Southwest winds 15 to 20 knots becoming west 10 to 15 knots. Showers likely with a chance of thunderstorms during the day, then a chance of showers and thunderstorms Thursday night. Waves 2 to 4 feet building to 3 to 5 feet, then subsiding to 2 to 4 feet. .FRIDAY...West winds 5 to 10 knots. Waves 1 to 2 feet. .SATURDAY...Southwest winds 5 to 15 knots. A chance of showers during the day, then a chance of showers and thunderstorms Saturday night. Waves 1 to 2 feet. Winds and waves higher in and near thunderstorms. $$ LOZ063>065-170300- Lake Ontario open waters from Hamlin Beach to the Saint Lawrence River- 402 PM EDT Mon Jun 16 2025 .TONIGHT...East winds 5 to 15 knots becoming southeast. Waves 2 feet or less. .TUESDAY...Southeast winds 5 to 15 knots. A chance of showers in the afternoon. Waves 2 feet or less. .TUESDAY NIGHT...Southeast winds 10 to 15 knots becoming south. A chance of showers and thunderstorms overnight. Waves 1 to 2 feet. .WEDNESDAY...Southwest winds 5 to 10 knots. A chance of showers and thunderstorms. Waves 2 feet or less. .WEDNESDAY NIGHT...South winds 5 to 15 knots. A chance of showers and thunderstorms in the evening, then showers likely with a chance of thunderstorms overnight. Waves 2 feet or less. .THURSDAY...South winds 15 to 20 knots becoming west 10 to 15 knots. Showers likely with a chance of thunderstorms during the day, then a chance of showers and thunderstorms Thursday night. Waves 1 to 3 feet building to 3 to 5 feet, then subsiding to 2 to 4 feet. .FRIDAY...West winds 5 to 15 knots. Waves 1 to 3 feet. .SATURDAY...Southwest winds 5 to 10 knots becoming south. A chance of showers during the day, then a chance of showers and thunderstorms Saturday night. Waves 1 to 2 feet. Winds and waves higher in and near thunderstorms. $$ LOZ061-170300- MAFOR 1621/ ONTARIO WEST 1/2 12200 14300 12200. Waves 2 feet or less. ONTARIO EAST 1/2 11210 13300 12310 12300. Waves 2 feet or less. $$