


Great Lakes Forecast
Issued by NWS
Issued by NWS
290 FZUS61 KBUF 312003 GLFSL Forecast for the Saint Lawrence River including the Thousand Islands Region National Weather Service Buffalo NY 403 PM EDT Thu Jul 31 2025 SLZ022-024-010300- Saint Lawrence River from Cape Vincent to Saint Regis 403 PM EDT Thu Jul 31 2025 .TONIGHT...Northeast winds 5 to 10 knots. Mostly cloudy early, then clearing. .FRIDAY...Northeast winds 5 to 10 knots becoming north. Sunny. .FRIDAY NIGHT...North winds 5 to 10 knots becoming light and variable. Mainly clear. .SATURDAY...Light and variable winds becoming southwest 5 to 10 knots. Sunny. .SATURDAY NIGHT...Southwest winds 10 knots or less. Mainly clear. .SUNDAY...Southwest winds 10 knots or less. Mainly clear. .MONDAY...Southwest winds less than 10 knots. Mainly clear, then becoming partly cloudy. .TUESDAY...East winds less than 10 knots. Partly cloudy. $$