FZUS61 KBUF 270202 GLFSL Forecast for the Saint Lawrence River including the Thousand Islands Region National Weather Service Buffalo NY 1002 PM EDT Sun Oct 26 2025 SLZ022-024-270900- Saint Lawrence River from Cape Vincent to Saint Regis 1002 PM EDT Sun Oct 26 2025 .OVERNIGHT...North winds 10 knots or less. Partly cloudy. .MONDAY...North winds 10 knots or less becoming northeast. Mostly sunny. .MONDAY NIGHT...Northeast winds less than 10 knots. 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. Mainly clear, then becoming partly cloudy. .THURSDAY...Northeast winds 10 knots or less. A chance of rain showers during the day, then rain showers likely Thursday night. .FRIDAY...Northeast winds 5 to 10 knots becoming southwest. Rain showers. $$