


Great Lakes Forecast
Issued by NWS
Issued by NWS
477 FZUS61 KBUF 150802 GLFSL Forecast for the Saint Lawrence River including the Thousand Islands Region National Weather Service Buffalo NY 402 AM EDT Sun Jun 15 2025 SLZ022-024-151500- Saint Lawrence River from Cape Vincent to Saint Regis 402 AM EDT Sun Jun 15 2025 .TODAY...Light and variable winds. Mostly sunny. .TONIGHT...Light and variable winds. Mainly clear through the early overnight, then becoming partly cloudy. .MONDAY...Light and variable winds. Mostly sunny. .MONDAY NIGHT...Southwest winds less than 10 knots. Partly to mostly cloudy. .TUESDAY...South winds 5 to 10 knots. A chance of showers. .WEDNESDAY...Southwest winds 10 knots or less. A chance of showers and thunderstorms during the day, then showers likely with a chance of thunderstorms Wednesday night. .THURSDAY...Southwest winds 10 knots or less becoming northwest. Showers likely with a chance of thunderstorms. Winds and waves higher in and near thunderstorms. $$