Great Lakes Forecast
Issued by NWS
Issued by NWS
715 FZUS61 KBUF 260803 GLFSL Forecast for the Saint Lawrence River including the Thousand Islands Region National Weather Service Buffalo NY 403 AM EDT Sat Sep 26 2026 SLZ022-024-261500- Saint Lawrence River from Cape Vincent to Saint Regis 403 AM EDT Sat Sep 26 2026 .TODAY...North winds 5 to 15 knots becoming northeast. Mostly sunny. .TONIGHT...Northeast winds 10 to 15 knots increasing to 15 to 20 knots. Mostly cloudy. .SUNDAY...Northeast winds 15 to 20 knots diminishing to 10 to 15 knots. A chance of showers. .SUNDAY NIGHT...Northeast winds 5 to 15 knots. A chance of showers in the evening. .MONDAY...Northeast winds 10 knots or less. Mostly cloudy. .TUESDAY...Light and variable winds. Partly to mostly cloudy. .WEDNESDAY...South winds 10 knots or less becoming southwest. Mostly cloudy. $$