479
FZUS61 KBUF 202003
GLFSL

Forecast for the Saint Lawrence River
including the Thousand Islands Region
National Weather Service Buffalo NY
403 PM EDT Mon Jul 20 2026

SLZ022-024-210300-
Saint Lawrence River from Cape Vincent to Saint Regis
403 PM EDT Mon Jul 20 2026

.TONIGHT...Southwest winds 10 knots or less becoming south 10 to
15 knots. Partly to mostly cloudy.
.TUESDAY...South winds 10 to 15 knots. A chance of showers late
in the morning. Showers with thunderstorms likely in the
afternoon. Some thunderstorms may produce gusty winds in the
afternoon.
.TUESDAY NIGHT...South winds 5 to 15 knots becoming southwest.
Showers with a chance of thunderstorms in the evening, then
showers overnight.
.WEDNESDAY...Southwest winds 10 to 15 knots becoming west 15 to
20 knots. A chance of showers in the morning, then showers likely
in the afternoon.
.WEDNESDAY NIGHT...West winds 5 to 15 knots. Showers likely in
the evening.
.THURSDAY...Southwest winds 10 knots or less. Becoming mainly
clear.
.FRIDAY...Southwest winds less than 10 knots. Mainly clear, then
becoming partly cloudy.
.SATURDAY...Southwest winds less than 10 knots becoming south.
Mainly clear, then becoming partly cloudy.

Winds and waves higher in and near thunderstorms.

$$