736
FZUS61 KBUF 210803
GLFSL

Forecast for the Saint Lawrence River
including the Thousand Islands Region
National Weather Service Buffalo NY
403 AM EDT Tue Jul 21 2026

SLZ022-024-211500-
Saint Lawrence River from Cape Vincent to Saint Regis
403 AM EDT Tue Jul 21 2026

.TODAY...South winds 10 to 15 knots. A chance of showers late
this morning. Showers with a chance of thunderstorms this
afternoon. Some thunderstorms may produce gusty winds from late
morning on.
.TONIGHT...South winds 5 to 15 knots becoming southwest. Showers
likely with a chance of thunderstorms through the early
overnight, then a chance of showers late. Some thunderstorms may
produce gusty winds in the evening.
.WEDNESDAY...Southwest winds 5 to 15 knots becoming west. A
chance of showers.
.WEDNESDAY NIGHT...West winds 5 to 10 knots. A chance of showers
in the evening.
.THURSDAY...Southwest winds 10 knots or less. Mainly clear.
.FRIDAY...Southwest winds less than 10 knots. Mainly clear, then
becoming partly cloudy.
.SATURDAY...South winds less than 10 knots. Mainly clear, then
becoming partly cloudy.

Winds and waves higher in and near thunderstorms.

$$