FZUS61 KBUF 010811 GLFSL Forecast for the Saint Lawrence River including the Thousand Islands Region National Weather Service Buffalo NY 411 AM EDT Wed Apr 1 2026 SLZ022-024-011500- Saint Lawrence River from Cape Vincent to Saint Regis 411 AM EDT Wed Apr 1 2026 .TODAY...Northwest winds 10 knots or less becoming north. Mostly cloudy through early afternoon, then becoming partly sunny. .TONIGHT...North winds 5 to 10 knots becoming northeast. Mostly cloudy. .THURSDAY...Northeast winds 5 to 15 knots. A chance of rain showers in the morning, then rain showers likely in the afternoon. .THURSDAY NIGHT...East winds 5 to 15 knots becoming south 15 to 20 knots. Rain showers. .FRIDAY...South winds 15 to 20 knots becoming northwest and diminishing to 5 to 10 knots. Showers during the day. .SATURDAY...Northeast winds 5 to 15 knots becoming south. A chance of rain showers during the day, then rain showers Saturday night. .SUNDAY...Southwest winds 10 to 15 knots becoming west. Rain showers during the day, then a chance of rain showers Sunday night. $$