FZUS61 KBUF 070203 GLFSL Forecast for the Saint Lawrence River including the Thousand Islands Region National Weather Service Buffalo NY 1003 PM EDT Sat Jun 6 2026 SLZ022-024-070900- Saint Lawrence River from Cape Vincent to Saint Regis 1003 PM EDT Sat Jun 6 2026 .REST OF TONIGHT...West winds 10 to 15 knots. Showers likely late this evening, then a chance of showers after midnight. .SUNDAY...Northwest winds 5 to 15 knots becoming north. A chance of showers in the morning. .SUNDAY NIGHT...North winds less than 10 knots. Partly cloudy. .MONDAY...East winds less than 10 knots. Sunny. .MONDAY NIGHT...Light and variable winds. Clear. .TUESDAY...South winds less than 10 knots. Mainly clear, then becoming partly cloudy. .WEDNESDAY...South winds 10 knots or less. Showers likely with a chance of thunderstorms. .THURSDAY...Southwest winds 10 knots or less. A chance of showers. Winds and waves higher in and near thunderstorms. $$