Great Lakes Forecast
Issued by NWS
Issued by NWS
559 FZUS61 KBUF 292003 GLFSL Forecast for the Saint Lawrence River including the Thousand Islands Region National Weather Service Buffalo NY 403 PM EDT Tue Sep 29 2026 SLZ022-024-300300- Saint Lawrence River from Cape Vincent to Saint Regis 403 PM EDT Tue Sep 29 2026 .TONIGHT...Southeast winds less than 10 knots becoming south. Partly cloudy. .WEDNESDAY...South winds 10 knots or less becoming southwest. Mostly cloudy. .WEDNESDAY NIGHT...Southwest winds 10 knots or less. Mostly cloudy. .THURSDAY...Southwest winds 5 to 15 knots. Mostly sunny in the morning, then becoming mostly cloudy. .THURSDAY NIGHT...Southwest winds 10 knots or less. A chance of showers in the evening, then showers likely overnight. .FRIDAY...West winds less than 10 knots becoming northwest. Showers likely during the day, then a chance of showers Friday night. .SATURDAY...Northwest winds less than 10 knots. Mainly clear, then becoming partly cloudy. .SUNDAY...Southeast winds 10 knots or less becoming west. A chance of rain showers Sunday night. $$