Great Lakes Forecast
Issued by NWS
Issued by NWS
173 FZUS61 KBUF 181502 GLFSL Forecast for the Saint Lawrence River including the Thousand Islands Region National Weather Service Buffalo NY 1002 AM EST Tue Nov 18 2025 SLZ022-182200- Saint Lawrence River from Cape Vincent to Ogdensburg- 1002 AM EST Tue Nov 18 2025 .THIS AFTERNOON...West winds 5 to 10 knots. Mostly sunny. .TONIGHT...West winds 10 knots or less becoming north. Mainly clear through the early overnight, then becoming partly cloudy. .WEDNESDAY...Light and variable winds. Sunny. .WEDNESDAY NIGHT...Light and variable winds. Partly cloudy in the evening, then becoming mostly cloudy. .THURSDAY...Light and variable winds becoming south 5 to 10 knots. Rain showers likely Thursday night. .FRIDAY...Southwest winds 10 knots or less becoming west. Rain showers during the day, then a chance of rain showers Friday night. .SATURDAY...West winds less than 10 knots becoming southwest. Mostly cloudy. $$ SLZ024-182200- Saint Lawrence River from Ogdensburg to Saint Regis- 1002 AM EST Tue Nov 18 2025 .THIS AFTERNOON...West winds 5 to 10 knots. Mostly cloudy, then becoming partly sunny. .TONIGHT...West winds less than 10 knots becoming northwest. Partly cloudy. .WEDNESDAY...Northwest winds less than 10 knots becoming west. Mostly sunny. .WEDNESDAY NIGHT...Light and variable winds. Partly cloudy in the evening, then becoming mostly cloudy. .THURSDAY...Light and variable winds becoming south 5 to 10 knots. Rain showers likely Thursday night. .FRIDAY...South winds 10 knots or less becoming west. Rain showers during the day, then a chance of rain showers Friday night. .SATURDAY...West winds less than 10 knots. Mostly cloudy. $$