Great Lakes Forecast
Issued by NWS
Issued by NWS
037 FZUS61 KBUF 272003 GLFSL Forecast for the Saint Lawrence River including the Thousand Islands Region National Weather Service Buffalo NY 403 PM EDT Sun Sep 27 2026 SLZ022-024-280300- Saint Lawrence River from Cape Vincent to Saint Regis 403 PM EDT Sun Sep 27 2026 .TONIGHT...Northeast winds 5 to 15 knots. Showers likely early, then a chance of showers late this evening. .MONDAY...Northeast winds 5 to 10 knots. A chance of showers early. .MONDAY NIGHT...Northeast winds 10 knots or less. Cloudy. .TUESDAY...North winds less than 10 knots. Mostly cloudy in the morning, then becoming mostly sunny. .TUESDAY NIGHT...Light and variable winds. Mainly clear in the evening, then becoming partly cloudy. .WEDNESDAY...South winds 10 knots or less. Mostly cloudy. .THURSDAY...South winds 5 to 15 knots becoming southwest. A chance of showers Thursday night. .FRIDAY...West winds 10 knots or less. A chance of showers during the day. $$