FZUS61 KBUF 102011 GLFSL Forecast for the Saint Lawrence River including the Thousand Islands Region National Weather Service Buffalo NY 411 PM EDT Fri Apr 10 2026 SLZ022-024-110300- Saint Lawrence River from Cape Vincent to Saint Regis 411 PM EDT Fri Apr 10 2026 .TONIGHT...North winds less than 10 knots becoming northwest. A chance of rain showers this evening. .SATURDAY...Northwest winds 5 to 10 knots. Mostly sunny. .SATURDAY NIGHT...West winds 5 to 10 knots becoming light and variable. Becoming mainly clear. .SUNDAY...South winds 10 knots or less. Rain showers likely in the afternoon. .SUNDAY NIGHT...South winds 5 to 15 knots becoming southwest 15 to 20 knots. Showers. .MONDAY...Southwest winds 15 to 20 knots becoming northwest 5 to 15 knots. Showers during the day, then a chance of showers Monday night. .TUESDAY...Northeast winds 5 to 10 knots becoming south. A chance of showers during the day, then showers likely Tuesday night. .WEDNESDAY...South winds 5 to 10 knots becoming southwest. Showers likely. $$