Great Lakes Forecast
Issued by NWS
Issued by NWS
404 FZUS61 KBUF 090802 GLFSL Forecast for the Saint Lawrence River including the Thousand Islands Region National Weather Service Buffalo NY 402 AM EDT Tue Jun 9 2026 SLZ022-024-091500- Saint Lawrence River from Cape Vincent to Saint Regis 402 AM EDT Tue Jun 9 2026 .TODAY...Light and variable winds becoming west 5 to 10 knots. Mostly sunny. .TONIGHT...West winds 10 knots or less becoming south. A chance of showers after midnight. .WEDNESDAY...South winds 5 to 10 knots. Showers likely in the morning, then showers with a chance of thunderstorms in the afternoon. .WEDNESDAY NIGHT...South winds 10 knots or less becoming southwest. Showers with a chance of thunderstorms in the evening, then showers overnight. .THURSDAY...Southwest winds 10 knots or less. A chance of showers. .FRIDAY...Southwest winds 5 to 10 knots. Showers likely with a chance of thunderstorms. .SATURDAY...Southwest winds 10 knots or less. Mainly clear, then becoming partly cloudy. Winds and waves higher in and near thunderstorms. $$