Great Lakes Forecast
Issued by NWS
Issued by NWS
129 FZUS61 KBUF 132003 GLFSL Forecast for the Saint Lawrence River including the Thousand Islands Region National Weather Service Buffalo NY 403 PM EDT Sun Sep 13 2026 SLZ022-024-140300- Saint Lawrence River from Cape Vincent to Saint Regis 403 PM EDT Sun Sep 13 2026 .TONIGHT...West winds 10 knots or less becoming northwest. Mostly cloudy. .MONDAY...Northwest winds 5 to 10 knots. Sunny. .MONDAY NIGHT...North winds less than 10 knots. Mainly clear. .TUESDAY...Southeast winds 10 knots or less becoming south 10 to 15 knots. Partly sunny. .TUESDAY NIGHT...South winds 10 to 15 knots increasing to 15 to 20 knots. A chance of showers. .WEDNESDAY...Southwest winds 5 to 10 knots becoming light and variable. A chance of showers during the day. .THURSDAY...Northeast winds less than 10 knots becoming northwest. A chance of showers. .FRIDAY...North winds less than 10 knots becoming east. A chance of showers Friday night. $$