Great Lakes Forecast
Issued by NWS
Issued by NWS
145 FZUS61 KBUF 210803 GLFSL Forecast for the Saint Lawrence River including the Thousand Islands Region National Weather Service Buffalo NY 403 AM EDT Mon Sep 21 2026 SLZ022-024-211500- Saint Lawrence River from Cape Vincent to Saint Regis 403 AM EDT Mon Sep 21 2026 .TODAY...North winds 5 to 15 knots becoming northeast. Partly sunny. .TONIGHT...Northeast winds 5 to 10 knots. Partly to mostly cloudy. .TUESDAY...Northeast winds 5 to 10 knots. Sunny. .TUESDAY NIGHT...Northeast winds 5 to 10 knots. Mainly clear. .WEDNESDAY...Northeast winds 10 knots or less. Mainly clear. .THURSDAY...Northeast winds 10 knots or less. Mainly clear, then becoming partly cloudy. .FRIDAY...Northeast winds 5 to 10 knots becoming north. Partly cloudy. $$