Great Lakes Forecast
Issued by NWS
Issued by NWS
625 FZUS61 KBUF 090203 GLFSL Forecast for the Saint Lawrence River including the Thousand Islands Region National Weather Service Buffalo NY 1003 PM EDT Tue Sep 8 2026 SLZ022-024-090900- Saint Lawrence River from Cape Vincent to Saint Regis 1003 PM EDT Tue Sep 8 2026 .OVERNIGHT...East winds less than 10 knots. Mostly cloudy. .WEDNESDAY...Southeast winds 5 to 15 knots becoming south. A chance of showers late in the morning. Showers early in the afternoon, then showers with a chance of thunderstorms late. .WEDNESDAY NIGHT...South winds 10 to 15 knots becoming southwest. Showers with a chance of thunderstorms in the evening, then a chance of showers overnight. .THURSDAY...West winds 5 to 15 knots. Partly to mostly sunny. .THURSDAY NIGHT...Northwest winds 10 knots or less. Partly cloudy in the evening, then becoming mainly clear. .FRIDAY...Northwest winds less than 10 knots becoming south. Mainly clear. .SATURDAY...South winds 5 to 15 knots. Mainly clear, then becoming partly cloudy. .SUNDAY...Southwest winds 5 to 15 knots becoming west. A chance of showers. Winds and waves higher in and near thunderstorms. $$