FZUS61 KBUF 182003
GLFSL 

Forecast for the Saint Lawrence River
including the Thousand Islands Region
National Weather Service Buffalo NY
403 PM EDT Mon May 18 2026

SLZ022-024-190300-
Saint Lawrence River from Cape Vincent to Saint Regis
403 PM EDT Mon May 18 2026

.TONIGHT...Southwest winds 5 to 10 knots. A chance of showers
late. 
.TUESDAY...Southwest winds 5 to 15 knots. A chance of showers
early. 
.TUESDAY NIGHT...Southwest winds 10 to 15 knots. Showers likely. 
.WEDNESDAY...Southwest winds 10 to 15 knots becoming west. A
chance of showers in the morning. 
.WEDNESDAY NIGHT...Northwest winds 5 to 15 knots becoming north.
Mainly clear in the evening, then becoming partly cloudy. 
.THURSDAY...North winds 5 to 10 knots becoming light and
variable. Mainly clear. 
.FRIDAY...Light and variable winds. A chance of showers Friday
night. 
.SATURDAY...East winds 10 knots or less becoming southeast. A
chance of showers. 

$$