FZUS61 KBUF 160203 GLFSL Forecast for the Saint Lawrence River including the Thousand Islands Region National Weather Service Buffalo NY 1003 PM EDT Thu Oct 15 2026 SLZ022-024-160900- Saint Lawrence River from Cape Vincent to Saint Regis 1003 PM EDT Thu Oct 15 2026 .OVERNIGHT...East winds 5 to 10 knots. Rain. .FRIDAY...Southeast winds 10 to 15 knots becoming west 15 to 20 knots. Rain. .FRIDAY NIGHT...Northwest winds 15 to 20 knots. A chance of rain in the evening. .SATURDAY...Northwest winds 15 to 20 knots becoming west 5 to 15 knots. Sunny. .SATURDAY NIGHT...West winds 10 knots or less becoming southwest. Mainly clear in the evening, then becoming partly cloudy. .SUNDAY...Southwest winds 5 to 15 knots. Mainly clear. .MONDAY...Southwest winds 5 to 15 knots diminishing to less than 10 knots. Mainly clear, then becoming partly cloudy. .TUESDAY...Light and variable winds. Becoming mainly clear. $$