FZUS61 KBUF 252004 GLFSL Forecast for the Saint Lawrence River including the Thousand Islands Region National Weather Service Buffalo NY 404 PM EDT Wed Mar 25 2026 SLZ022-024-260300- Saint Lawrence River from Cape Vincent to Saint Regis 404 PM EDT Wed Mar 25 2026 .TONIGHT...East winds less than 10 knots becoming south and increasing to 15 to 20 knots after midnight. A chance of rain showers, snow showers and freezing rain this evening, then rain showers likely with a chance of freezing rain after midnight. .THURSDAY...Southwest winds 5 to 15 knots becoming west. A chance of rain showers early. A chance of rain showers late. .THURSDAY NIGHT...Northwest winds 5 to 15 knots becoming north. Rain showers likely with a chance of snow showers in the evening, then a chance of rain and snow showers overnight. .FRIDAY...North winds 5 to 15 knots. Sunny. .FRIDAY NIGHT...North winds 10 knots or less. Partly to mostly cloudy. .SATURDAY...Northwest winds 10 knots or less becoming southwest. Partly cloudy. .SUNDAY...Southwest winds 5 to 10 knots becoming south. Partly cloudy, then becoming mostly cloudy. .MONDAY...Southwest winds 5 to 10 knots becoming northwest. A chance of rain and snow showers during the day. $$