


Great Lakes Forecast
Issued by NWS
Issued by NWS
871 FZUS61 KBUF 092003 GLFSL Forecast for the Saint Lawrence River including the Thousand Islands Region National Weather Service Buffalo NY 403 PM EDT Sat Aug 9 2025 SLZ022-024-100300- Saint Lawrence River from Cape Vincent to Saint Regis 403 PM EDT Sat Aug 9 2025 .TONIGHT...Southwest winds 10 knots or less becoming south. Partly cloudy. .SUNDAY...South winds 5 to 10 knots becoming southwest. Sunny. .SUNDAY NIGHT...Southwest winds 10 knots or less becoming south. Mainly clear. .MONDAY...South winds 10 knots or less becoming southwest. Sunny. .MONDAY NIGHT...Southwest winds less than 10 knots becoming south. Mainly clear. .TUESDAY...Southwest winds 10 knots or less. A chance of showers and thunderstorms Tuesday night. .WEDNESDAY...Southwest winds 10 knots or less becoming northwest. A chance of showers and thunderstorms. .THURSDAY...North winds less than 10 knots becoming northeast. Partly cloudy. Winds and waves higher in and near thunderstorms. $$