FZUS61 KBUF 022010 GLFSL Forecast for the Saint Lawrence River including the Thousand Islands Region National Weather Service Buffalo NY 410 PM EDT Thu Apr 2 2026 SLZ022-024-030300- Saint Lawrence River from Cape Vincent to Saint Regis 410 PM EDT Thu Apr 2 2026 .TONIGHT...East winds 5 to 15 knots becoming south 15 to 20 knots. Rain showers. .FRIDAY...South winds 15 to 20 knots becoming southwest. Showers early, then showers likely late in the morning. A chance of showers early in the afternoon. .FRIDAY NIGHT...West winds 15 to 20 knots becoming north and diminishing to less than 10 knots overnight. Partly to mostly cloudy. .SATURDAY...Northeast winds 5 to 10 knots. Rain showers likely in the afternoon. .SATURDAY NIGHT...East winds 5 to 15 knots becoming south 15 to 20 knots. Showers. .SUNDAY...Southwest winds 15 to 20 knots becoming west 10 to 15 knots. Rain showers during the day, then a chance of snow showers Sunday night. .MONDAY...West winds 5 to 10 knots becoming northwest. A chance of snow showers during the day. .TUESDAY...North winds 10 knots or less becoming northwest. Mostly cloudy, then clearing. $$