


Great Lakes Forecast
Issued by NWS
Issued by NWS
946 FZUS61 KBUF 040202 GLFSL Forecast for the Saint Lawrence River including the Thousand Islands Region National Weather Service Buffalo NY 1002 PM EDT Wed Sep 3 2025 SLZ022-024-040900- Saint Lawrence River from Cape Vincent to Saint Regis 1002 PM EDT Wed Sep 3 2025 .REST OF TONIGHT...South winds 5 to 15 knots. Mainly clear late this evening, then becoming partly cloudy. .THURSDAY...South winds 10 to 15 knots becoming southwest. A chance of showers early. Showers with a chance of thunderstorms in the afternoon. .THURSDAY NIGHT...Southwest winds 10 knots or less. Showers with a chance of thunderstorms in the evening, then a chance of showers overnight. .FRIDAY...South winds 10 knots or less becoming southwest 10 to 15 knots. Mostly sunny. .FRIDAY NIGHT...Southwest winds 5 to 15 knots. Scattered showers. .SATURDAY...Southwest winds 10 knots or less. Scattered showers during the day. .SUNDAY...Southwest winds 10 knots or less becoming west. Partly cloudy. .MONDAY...West winds less than 10 knots. Becoming mainly clear. Winds and waves higher in and near thunderstorms. $$