Great Lakes Forecast
Issued by NWS
Issued by NWS
949 FZUS61 KBUF 120203 GLFSL Forecast for the Saint Lawrence River including the Thousand Islands Region National Weather Service Buffalo NY 1003 PM EDT Thu Jun 11 2026 SLZ022-024-120900- Saint Lawrence River from Cape Vincent to Saint Regis 1003 PM EDT Thu Jun 11 2026 .OVERNIGHT...Southwest winds 10 knots or less. Mostly cloudy. .FRIDAY...South winds 5 to 15 knots becoming southwest. A chance of showers and thunderstorms in the afternoon. .FRIDAY NIGHT...Southwest winds 5 to 15 knots diminishing to less than 10 knots. Mainly clear. .SATURDAY...Southwest winds 10 knots or less. Sunny. .SATURDAY NIGHT...Southwest winds 5 to 10 knots. Partly cloudy. .SUNDAY...Southwest winds 5 to 15 knots. Showers with a chance of thunderstorms. .MONDAY...West winds 5 to 15 knots becoming southwest less than 10 knots. Partly cloudy. .TUESDAY...Southwest winds 10 knots or less. Partly cloudy. Winds and waves higher in and near thunderstorms. $$