Great Lakes Forecast
Issued by NWS
Issued by NWS
103 FZUS61 KBUF 050803 GLFSL Forecast for the Saint Lawrence River including the Thousand Islands Region National Weather Service Buffalo NY 403 AM EDT Sat Sep 5 2026 SLZ022-024-051500- Saint Lawrence River from Cape Vincent to Saint Regis 403 AM EDT Sat Sep 5 2026 .TODAY...North winds 10 knots or less becoming northeast. A chance of showers this afternoon. .TONIGHT...Northeast winds 10 knots or less. Partly cloudy in the evening, then becoming mainly clear. .SUNDAY...Northeast winds 5 to 10 knots becoming north. Mostly sunny. .SUNDAY NIGHT...Northwest winds less than 10 knots. Patchy fog overnight. .MONDAY...Light and variable winds. Mainly clear, then becoming partly cloudy. .TUESDAY...Northwest winds 10 knots or less becoming south. A chance of showers Tuesday night. .WEDNESDAY...South winds 10 to 15 knots becoming southwest. Showers likely. $$