Great Lakes Forecast 
Issued by NWS
        
        
                
        
            
        Issued by NWS
155 FZUS61 KBUF 040302 GLFSL Forecast for the Saint Lawrence River including the Thousand Islands Region National Weather Service Buffalo NY 1002 PM EST Mon Nov 3 2025 SLZ022-024-041000- Saint Lawrence River from Cape Vincent to Saint Regis 1002 PM EST Mon Nov 3 2025 .OVERNIGHT...West winds 15 to 20 knots diminishing to 10 to 15 knots. A chance of rain showers. .TUESDAY...West winds 10 to 15 knots. Sunny. .TUESDAY NIGHT...West winds 10 knots or less becoming southwest. A chance of rain showers overnight. .WEDNESDAY...South winds 5 to 10 knots. Rain showers. .WEDNESDAY NIGHT...Northwest winds 10 to 15 knots. Rain showers. .THURSDAY...Northwest winds 10 knots or less becoming south. A chance of rain showers during the day. .FRIDAY...South winds 10 to 15 knots becoming west. Rain showers. .SATURDAY...Northwest winds 10 knots or less becoming east. Rain showers likely during the day, then a chance of rain and snow showers Saturday night. $$