461
FZUS61 KBUF 211403
GLFSL

Forecast for the Saint Lawrence River
including the Thousand Islands Region
National Weather Service Buffalo NY
1003 AM EDT Fri Aug 21 2026

SLZ022-024-212100-
Saint Lawrence River from Cape Vincent to Saint Regis
1003 AM EDT Fri Aug 21 2026

.THIS AFTERNOON...Northeast winds less than 10 knots. Sunny.
.TONIGHT...Northeast winds less than 10 knots. Mainly clear
through the early overnight, then becoming partly cloudy.
.SATURDAY...Light and variable winds. Sunny.
.SATURDAY NIGHT...Southeast winds 10 knots or less. A chance of
showers in the evening, then showers overnight.
.SUNDAY...Southeast winds 5 to 10 knots becoming southwest.
Showers with a chance of thunderstorms.
.MONDAY...Southwest winds 5 to 10 knots. Showers likely with a
chance of thunderstorms.
.TUESDAY...West winds 10 knots or less becoming southwest. Partly
to mostly cloudy.

Winds and waves higher in and near thunderstorms.

$$