Great Lakes Forecast
Issued by NWS
Issued by NWS
377 FZUS61 KBUF 310803 GLFSL Forecast for the Saint Lawrence River including the Thousand Islands Region National Weather Service Buffalo NY 403 AM EDT Sun May 31 2026 SLZ022-024-311500- Saint Lawrence River from Cape Vincent to Saint Regis 403 AM EDT Sun May 31 2026 .TODAY...Southwest winds 10 knots or less becoming northwest. A chance of showers this afternoon. .TONIGHT...Northwest winds less than 10 knots. Showers likely early, then a chance of showers late in the evening. .MONDAY...North winds less than 10 knots becoming northeast. Sunny. .MONDAY NIGHT...Northeast winds less than 10 knots. Mainly clear. .TUESDAY...Northwest winds less than 10 knots. Partly cloudy. .WEDNESDAY...Light and variable winds. Mainly clear. .THURSDAY...Southwest winds 10 knots or less. Mainly clear, then becoming partly cloudy. $$