FZUS61 KBUF 280805 GLFSL Forecast for the Saint Lawrence River including the Thousand Islands Region National Weather Service Buffalo NY 404 AM EDT Sat Mar 28 2026 SLZ022-024-281500- Saint Lawrence River from Cape Vincent to Saint Regis 404 AM EDT Sat Mar 28 2026 .TODAY...Southwest winds 10 knots or less becoming west 10 to 15 knots. Partly to mostly sunny. .TONIGHT...West winds 5 to 15 knots becoming southwest. A chance of snow showers after midnight. .SUNDAY...Southwest winds 5 to 15 knots. A chance of snow showers in the morning. .SUNDAY NIGHT...Southwest winds 5 to 10 knots. Mostly cloudy. .MONDAY...Southwest winds 5 to 10 knots becoming east. A chance of rain showers Monday night. .TUESDAY...East winds 10 to 15 knots becoming southwest. Rain showers. .WEDNESDAY...West winds 5 to 10 knots becoming north. Rain showers during the day. $$