


Great Lakes Forecast
Issued by NWS
Issued by NWS
098 FZUS61 KBUF 052002 GLFSL Forecast for the Saint Lawrence River including the Thousand Islands Region National Weather Service Buffalo NY 402 PM EDT Sun Oct 5 2025 SLZ022-024-060300- Saint Lawrence River from Cape Vincent to Saint Regis 402 PM EDT Sun Oct 5 2025 .TONIGHT...Southwest winds 10 knots or less becoming south. Mainly clear through the early overnight, then becoming partly cloudy. .MONDAY...South winds 5 to 15 knots becoming southwest. Sunny. .MONDAY NIGHT...Southwest winds 5 to 10 knots becoming south. A chance of showers overnight. .TUESDAY...South winds 5 to 10 knots becoming southwest. Showers with a chance of thunderstorms. .TUESDAY NIGHT...West winds 5 to 10 knots becoming northwest. Showers. .WEDNESDAY...Northwest winds 5 to 10 knots becoming north. A chance of rain showers during the day. .THURSDAY...North winds less than 10 knots. Mainly clear. .FRIDAY...South winds 5 to 10 knots becoming southwest. Mainly clear, then becoming partly cloudy. Winds and waves higher in and near thunderstorms. $$