


Great Lakes Forecast
Issued by NWS
Issued by NWS
956 FZUS61 KBUF 030802 GLFSL Forecast for the Saint Lawrence River including the Thousand Islands Region National Weather Service Buffalo NY 402 AM EDT Wed Sep 3 2025 SLZ022-024-031500- Saint Lawrence River from Cape Vincent to Saint Regis 402 AM EDT Wed Sep 3 2025 .TODAY...South winds 10 knots or less becoming southwest. Sunny. .TONIGHT...South winds 10 knots or less. Mainly clear in the evening, then becoming partly cloudy. .THURSDAY...South winds 10 to 15 knots becoming southwest. Showers with a chance of thunderstorms in the afternoon. .THURSDAY NIGHT...Southwest winds 5 to 10 knots becoming light and variable. Showers with a chance of thunderstorms in the evening, then showers likely overnight. .FRIDAY...South winds 10 to 15 knots becoming southwest. A chance of showers Friday night. .SATURDAY...Southwest winds 10 knots or less. A chance of showers during the day. .SUNDAY...Southwest winds 10 knots or less becoming west. Partly cloudy. Winds and waves higher in and near thunderstorms. $$