FZUS61 KBUF 162003 GLFSL Forecast for the Saint Lawrence River including the Thousand Islands Region National Weather Service Buffalo NY 403 PM EDT Fri Oct 16 2026 SLZ022-024-170300- Saint Lawrence River from Cape Vincent to Saint Regis 403 PM EDT Fri Oct 16 2026 .TONIGHT...Northwest winds 15 to 20 knots. A chance of rain showers early. .SATURDAY...Northwest winds 5 to 15 knots. Sunny. .SATURDAY NIGHT...West winds less than 10 knots becoming south. Mainly clear in the evening, then becoming partly cloudy. .SUNDAY...South winds 10 knots or less becoming southwest 10 to 15 knots. Sunny. .SUNDAY NIGHT...Southwest winds 5 to 10 knots becoming south. Mainly clear. .MONDAY...Southwest winds 5 to 10 knots becoming light and variable. Mainly clear. .TUESDAY...Light and variable winds becoming northeast 5 to 10 knots. Mainly clear. .WEDNESDAY...Northeast winds 5 to 10 knots becoming light and variable. Mainly clear. $$