FZUS61 KBUF 092001 GLFSL Forecast for the Saint Lawrence River including the Thousand Islands Region National Weather Service Buffalo NY 401 PM EDT Fri May 9 2025 SLZ022-024-100300- Saint Lawrence River from Cape Vincent to Saint Regis 401 PM EDT Fri May 9 2025 .TONIGHT...North winds 10 knots or less. Rain this evening, then a chance of rain after midnight. Rain likely late. .SATURDAY...Northwest winds 5 to 10 knots. A chance of rain early. .SATURDAY NIGHT...Northwest winds 5 to 10 knots becoming north. Becoming mainly clear. .SUNDAY...North winds 5 to 10 knots becoming northwest. Sunny. .SUNDAY NIGHT...West winds less than 10 knots becoming south. Mainly clear in the evening, then becoming partly cloudy. .MONDAY...Southwest winds 5 to 10 knots. Mainly clear. .TUESDAY...Southwest winds less than 10 knots becoming south. Partly cloudy, then becoming mostly cloudy. .WEDNESDAY...South winds less than 10 knots. A chance of showers. $$