539
FZUS61 KBUF 220202
GLFSL

Forecast for the Saint Lawrence River
including the Thousand Islands Region
National Weather Service Buffalo NY
1002 PM EDT Thu Aug 21 2025

SLZ022-024-220900-
Saint Lawrence River from Cape Vincent to Saint Regis
1002 PM EDT Thu Aug 21 2025

.OVERNIGHT...Northeast winds less than 10 knots. Clear.
.FRIDAY...Light and variable winds. Sunny.
.FRIDAY NIGHT...Southwest winds less than 10 knots becoming
south. Mainly clear in the evening, then becoming partly cloudy.
.SATURDAY...South winds 5 to 10 knots becoming southwest. Partly
to mostly sunny.
.SATURDAY NIGHT...South winds 5 to 15 knots. Showers with a
chance of thunderstorms.
.SUNDAY...South winds 5 to 15 knots diminishing to less than
10 knots. Showers with a chance of thunderstorms.
.MONDAY...Southwest winds 5 to 10 knots. Showers likely.
.TUESDAY...West winds 10 knots or less. A chance of showers.

Winds and waves higher in and near thunderstorms.

$$