FZUS61 KBUF 272002 GLFSL Forecast for the Saint Lawrence River including the Thousand Islands Region National Weather Service Buffalo NY 402 PM EDT Mon Oct 27 2025 SLZ022-024-280300- Saint Lawrence River from Cape Vincent to Saint Regis 402 PM EDT Mon Oct 27 2025 .TONIGHT...Northeast winds 10 knots or less. Mainly clear through the early overnight, then becoming partly cloudy. .TUESDAY...Northeast winds 10 knots or less. Mostly sunny. .TUESDAY NIGHT...Northeast winds 10 knots or less. Mainly clear. .WEDNESDAY...Northeast winds 10 knots or less. Sunny. .WEDNESDAY NIGHT...Northeast winds 10 knots or less. A chance of rain showers overnight. .THURSDAY...Northeast winds 5 to 15 knots. Rain showers. .FRIDAY...East winds 5 to 15 knots becoming west. Rain showers. .SATURDAY...West winds 5 to 15 knots. Rain showers during the day, then a chance of rain showers Saturday night. $$