FZUS61 KBUF 091403 GLFSL Forecast for the Saint Lawrence River including the Thousand Islands Region National Weather Service Buffalo NY 1003 AM EDT Thu Jul 9 2026 SLZ022-024-092100- Saint Lawrence River from Cape Vincent to Saint Regis 1003 AM EDT Thu Jul 9 2026 .REST OF TODAY...West winds 5 to 10 knots becoming north. A chance of showers late this morning, then showers with a chance of thunderstorms this afternoon. .TONIGHT...Northeast winds 5 to 10 knots becoming light and variable. Showers with a chance of thunderstorms through the early overnight, then a chance of showers late. .FRIDAY...Light and variable winds. Partly to mostly sunny. .FRIDAY NIGHT...North winds less than 10 knots. Mainly clear in the evening, then becoming partly cloudy. .SATURDAY...Northeast winds less than 10 knots. Mainly clear. .SUNDAY...Light and variable winds. Mainly clear. .MONDAY...Southwest winds 5 to 10 knots. Mainly clear, then becoming partly cloudy. Winds and waves higher in and near thunderstorms. $$