


Great Lakes Forecast
Issued by NWS
Issued by NWS
993 FZUS61 KBUF 312002 GLFSL Forecast for the Saint Lawrence River including the Thousand Islands Region National Weather Service Buffalo NY 402 PM EDT Sun Aug 31 2025 SLZ022-024-010300- Saint Lawrence River from Cape Vincent to Saint Regis 402 PM EDT Sun Aug 31 2025 .TONIGHT...Light and variable winds. Patchy fog after midnight. .MONDAY...Light and variable winds. Patchy fog early. .MONDAY NIGHT...Light and variable winds. Mostly cloudy. .TUESDAY...Light and variable winds. Mostly sunny. .TUESDAY NIGHT...Southwest winds less than 10 knots. Partly cloudy. .WEDNESDAY...Southwest winds 10 knots or less becoming south. Mainly clear. .THURSDAY...South winds 5 to 15 knots. A chance of showers during the day, then showers Thursday night. .FRIDAY...South winds 5 to 15 knots becoming southwest. Showers during the day, then a chance of showers Friday night. $$