Great Lakes Forecast
Issued by NWS
Issued by NWS
200 FZUS61 KBUF 312003 GLFSL Forecast for the Saint Lawrence River including the Thousand Islands Region National Weather Service Buffalo NY 403 PM EDT Sat Oct 31 2026 SLZ022-024-010300- Saint Lawrence River from Cape Vincent to Saint Regis 403 PM EDT Sat Oct 31 2026 .TONIGHT...West winds less than 10 knots. Mainly clear. .SUNDAY...Southwest winds 10 knots or less. Mostly sunny. .SUNDAY NIGHT...Southwest winds 5 to 10 knots. Mostly cloudy. .MONDAY...Southwest winds 5 to 10 knots. Partly to mostly sunny. .MONDAY NIGHT...Southwest winds less than 10 knots. Mostly cloudy. .TUESDAY...South winds 10 knots or less. A chance of showers. .WEDNESDAY...South winds 5 to 15 knots becoming southwest. A chance of showers Wednesday night. .THURSDAY...South winds 10 knots or less becoming east. A chance of showers during the day, then showers likely Thursday night. $$