Great Lakes Forecast
Issued by NWS
Issued by NWS
968 FZUS61 KBUF 070803 GLFSL Forecast for the Saint Lawrence River including the Thousand Islands Region National Weather Service Buffalo NY 403 AM EDT Mon Sep 7 2026 SLZ022-024-071500- Saint Lawrence River from Cape Vincent to Saint Regis 403 AM EDT Mon Sep 7 2026 .TODAY...Light and variable winds becoming northwest 5 to 10 knots. Sunny. .TONIGHT...West winds less than 10 knots becoming northwest. Partly cloudy through the early overnight, then becoming mostly cloudy. .TUESDAY...North winds less than 10 knots. Partly sunny in the morning, then becoming mostly cloudy. .TUESDAY NIGHT...Light and variable winds becoming south 5 to 10 knots. Cloudy. .WEDNESDAY...South winds 10 to 15 knots becoming southwest 15 to 20 knots. Showers. .THURSDAY...West winds 5 to 15 knots becoming northwest. Partly to mostly cloudy. .FRIDAY...West winds 10 knots or less becoming south. Mainly clear. $$