FZUS61 KBUF 070203 GLFSL Forecast for the Saint Lawrence River including the Thousand Islands Region National Weather Service Buffalo NY 1003 PM EDT Wed May 6 2026 SLZ022-024-070900- Saint Lawrence River from Cape Vincent to Saint Regis 1003 PM EDT Wed May 6 2026 .OVERNIGHT...Southwest winds 5 to 10 knots. Mostly cloudy. .THURSDAY...West winds 5 to 15 knots becoming southwest. Sunny through early afternoon, then becoming partly sunny. .THURSDAY NIGHT...Southwest winds 10 knots or less becoming west. Partly cloudy. .FRIDAY...Southwest winds 10 knots or less. Mostly sunny. .FRIDAY NIGHT...Southwest winds 10 knots or less becoming south. Partly cloudy. .SATURDAY...South winds 5 to 10 knots becoming southwest. A chance of rain showers. .SUNDAY...Southwest winds 10 knots or less becoming north. Showers likely. .MONDAY...North winds 5 to 10 knots becoming northwest. A chance of rain showers. $$