Great Lakes Forecast
Issued by NWS
Issued by NWS
381 FZUS61 KBUF 250803 GLFSL Forecast for the Saint Lawrence River including the Thousand Islands Region National Weather Service Buffalo NY 403 AM EDT Sun Oct 25 2026 SLZ022-024-251500- Saint Lawrence River from Cape Vincent to Saint Regis 403 AM EDT Sun Oct 25 2026 .TODAY...South winds 10 knots or less becoming southwest. Sunny. .TONIGHT...Southwest winds 5 to 10 knots. Partly to mostly cloudy. .MONDAY...Southwest winds 10 knots or less becoming northwest. A chance of showers. .MONDAY NIGHT...Northwest winds 5 to 10 knots becoming north. Becoming mainly clear. .TUESDAY...North winds 5 to 10 knots becoming light and variable. Mainly clear. .WEDNESDAY...Light and variable winds becoming south 10 to 15 knots. Partly cloudy. .THURSDAY...South winds 5 to 15 knots becoming west less than 10 knots. A chance of showers. $$