Great Lakes Forecast
Issued by NWS
Issued by NWS
486 FZUS61 KBUF 250902 GLFSL Forecast for the Saint Lawrence River including the Thousand Islands Region National Weather Service Buffalo NY 402 AM EST Tue Nov 25 2025 SLZ022-251600- Saint Lawrence River from Cape Vincent to Ogdensburg- 402 AM EST Tue Nov 25 2025 .TODAY...South winds 5 to 15 knots. A chance of rain showers late. .TONIGHT...Southeast winds less than 10 knots. Showers. .WEDNESDAY...Southeast winds 10 knots or less becoming southwest and increasing to 15 to 20 knots in the afternoon. Showers. .WEDNESDAY NIGHT...Southwest winds 15 to 25 knots. Rain showers in the evening, then rain and snow showers likely overnight. .THURSDAY...Southwest winds to 30 knots becoming west and diminishing to 10 to 15 knots. Rain and snow showers likely during the day, then snow showers likely Thursday night. .FRIDAY...West winds 5 to 15 knots. A chance of snow showers during the day. .SATURDAY...West winds 10 knots or less becoming southeast. A chance of snow showers Saturday night. $$ SLZ024-251600- Saint Lawrence River from Ogdensburg to Saint Regis- 402 AM EST Tue Nov 25 2025 .TODAY...Southwest winds 5 to 15 knots becoming south less than 10 knots. Mostly cloudy. .TONIGHT...Light and variable winds. Rain showers. .WEDNESDAY...East winds 10 knots or less becoming south and increasing to 15 to 20 knots in the afternoon. Rain showers. .WEDNESDAY NIGHT...Southwest winds 15 to 25 knots increasing to 30 knots. Rain showers in the evening, then rain showers likely with a chance of snow showers overnight. .THURSDAY...Southwest winds to 30 knots becoming west and diminishing to 15 to 20 knots. Rain and snow showers likely during the day, then snow showers likely Thursday night. .FRIDAY...West winds 15 to 20 knots diminishing to 10 to 15 knots. Snow showers likely during the day. .SATURDAY...West winds 10 knots or less becoming southeast. A chance of snow showers Saturday night. $$