Great Lakes Forecast
Issued by NWS
Issued by NWS
185 FZUS61 KBUF 200803 GLFSL Forecast for the Saint Lawrence River including the Thousand Islands Region National Weather Service Buffalo NY 403 AM EDT Sun Sep 20 2026 SLZ022-024-201500- Saint Lawrence River from Cape Vincent to Saint Regis 403 AM EDT Sun Sep 20 2026 .TODAY...Northeast winds 10 knots or less. Showers likely early, then a chance of showers. .TONIGHT...Northeast winds 10 knots or less becoming north 10 to 15 knots. Partly to mostly cloudy. .MONDAY...North winds 5 to 15 knots becoming northeast. Partly sunny. .MONDAY NIGHT...Northeast winds 5 to 15 knots. Mostly cloudy. .TUESDAY...Northeast winds 5 to 15 knots. Partly cloudy. .WEDNESDAY...Northeast winds 10 knots or less. Partly cloudy. .THURSDAY...Northeast winds 10 knots or less. Partly cloudy. $$