Great Lakes Forecast
Issued by NWS
Issued by NWS
431 FZUS61 KBUF 301403 GLFSL Forecast for the Saint Lawrence River including the Thousand Islands Region National Weather Service Buffalo NY 1003 AM EDT Tue Jun 30 2026 SLZ022-024-302100- Saint Lawrence River from Cape Vincent to Saint Regis 1003 AM EDT Tue Jun 30 2026 .THIS AFTERNOON...Southwest winds 5 to 15 knots. A chance of showers and thunderstorms. .TONIGHT...Southwest winds 5 to 10 knots. A chance of showers and thunderstorms in the evening. A chance of showers and thunderstorms late. .WEDNESDAY...Southwest winds 5 to 10 knots. A chance of showers and thunderstorms. .WEDNESDAY NIGHT...Southwest winds 10 knots or less. A chance of showers and thunderstorms in the evening. .THURSDAY...Southwest winds 5 to 15 knots. A chance of showers and thunderstorms. .FRIDAY...West winds 10 knots or less becoming southwest. Partly cloudy. .SATURDAY...West winds less than 10 knots. A chance of showers and thunderstorms. Winds and waves higher in and near thunderstorms. $$