Great Lakes Forecast
Issued by NWS
Issued by NWS
947 FZUS61 KBUF 122003 GLFSL Forecast for the Saint Lawrence River including the Thousand Islands Region National Weather Service Buffalo NY 403 PM EDT Sat Sep 12 2026 SLZ022-024-130300- Saint Lawrence River from Cape Vincent to Saint Regis 403 PM EDT Sat Sep 12 2026 .TONIGHT...South winds 5 to 15 knots. A chance of showers late this evening. Showers likely after midnight, then a chance of showers late. .SUNDAY...Southwest winds 5 to 10 knots. A chance of showers. .SUNDAY NIGHT...Southwest winds 5 to 15 knots becoming northwest. A chance of showers. .MONDAY...Northwest winds 5 to 10 knots. Sunny. .MONDAY NIGHT...North winds less than 10 knots. Mainly clear. .TUESDAY...South winds 5 to 15 knots increasing to 15 to 20 knots. A chance of showers Tuesday night. .WEDNESDAY...Southwest winds 5 to 10 knots becoming light and variable. A chance of showers. .THURSDAY...East winds 10 knots or less becoming north. Showers likely. $$