Great Lakes Forecast
Issued by NWS
Issued by NWS
634 FZUS61 KBUF 122003 GLFSL Forecast for the Saint Lawrence River including the Thousand Islands Region National Weather Service Buffalo NY 403 PM EDT Tue May 12 2026 SLZ022-024-130300- Saint Lawrence River from Cape Vincent to Saint Regis 403 PM EDT Tue May 12 2026 .TONIGHT...Southwest winds 5 to 10 knots becoming southeast. Showers likely late. .WEDNESDAY...Southeast winds 5 to 15 knots becoming south. Showers through early afternoon, then showers likely late. .WEDNESDAY NIGHT...South winds 10 knots or less becoming southwest. Showers. .THURSDAY...Southwest winds less than 10 knots becoming northwest. Showers. .THURSDAY NIGHT...North winds less than 10 knots. A chance of showers in the evening. .FRIDAY...North winds 10 knots or less becoming southwest. Mostly cloudy. .SATURDAY...Southwest winds 5 to 15 knots becoming west. A chance of showers. .SUNDAY...West winds 5 to 10 knots becoming light and variable. Partly cloudy. $$