


Great Lakes Forecast
Issued by NWS
Issued by NWS
876 FZUS61 KBUF 050802 GLFSL Forecast for the Saint Lawrence River including the Thousand Islands Region National Weather Service Buffalo NY 402 AM EDT Sat Jul 5 2025 SLZ022-024-051500- Saint Lawrence River from Cape Vincent to Saint Regis 402 AM EDT Sat Jul 5 2025 .TODAY...South winds 10 knots or less becoming southwest. Partly to mostly sunny. .TONIGHT...Southwest winds 5 to 10 knots. Partly to mostly cloudy. .SUNDAY...Southwest winds 5 to 15 knots. A chance of showers in the afternoon. .SUNDAY NIGHT...Southwest winds 10 knots or less becoming west. Showers likely. .MONDAY...West winds 10 knots or less becoming north. A chance of showers and thunderstorms. .TUESDAY...North winds less than 10 knots. Mostly cloudy, then clearing. .WEDNESDAY...North winds less than 10 knots. Partly cloudy. Winds and waves higher in and near thunderstorms. $$