Great Lakes Forecast
Issued by NWS
Issued by NWS
855 FZUS61 KBUF 260203 GLFSL Forecast for the Saint Lawrence River including the Thousand Islands Region National Weather Service Buffalo NY 1003 PM EDT Fri Sep 25 2026 SLZ022-024-260900- Saint Lawrence River from Cape Vincent to Saint Regis 1003 PM EDT Fri Sep 25 2026 .OVERNIGHT...North winds 10 knots or less. Mainly clear. .SATURDAY...North winds 5 to 10 knots becoming northeast. Mostly sunny through early afternoon, then becoming mostly cloudy. .SATURDAY NIGHT...Northeast winds 5 to 15 knots. Partly to mostly cloudy. .SUNDAY...Northeast winds 10 to 15 knots. A chance of rain in the afternoon. .SUNDAY NIGHT...Northeast winds 5 to 15 knots. A chance of rain. .MONDAY...Northeast winds 10 knots or less. A chance of showers during the day. .TUESDAY...Light and variable winds. Mostly cloudy, then becoming partly cloudy. .WEDNESDAY...South winds 10 knots or less. Partly to mostly cloudy. $$