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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
403 am edt thu jul 2 2026


slz022-024-021500-
saint lawrence river from cape vincent to saint regis
403 am edt thu jul 2 2026

.today...southwest winds 5 to 15 knots. a chance of showers and
thunderstorms this afternoon. 
.tonight...southwest winds 10 knots or less. a chance of showers
and thunderstorms early. 
.friday...southwest winds 10 knots or less. a chance of showers
and thunderstorms in the afternoon. 
.friday night...southwest winds 10 knots or less. a chance of
showers and thunderstorms in the evening, then a chance of
showers overnight. 
.saturday...west winds less than 10 knots. a chance of showers. 
.sunday...northeast winds less than 10 knots becoming east. a
chance of showers sunday night. 
.monday...east winds less than 10 knots. a chance of showers. 

winds and waves higher in and near thunderstorms.

$$

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open lake forecast for lake ontario
national weather service buffalo ny
402 am edt thu jul 2 2026

for waters beyond five nautical miles of shore on lake ontario

waves are the significant wave height - the average of the highest
1/3 of the wave spectrum. occasional wave height is the average of
the highest 1/10 of the wave spectrum.

.synopsis...a 30.1 inch high will remain anchored from the ohio 
valley to the mid atlantic through friday. a weak cold front will 
move slowly southward across the lake saturday and saturday night. 
behind the front, a 30.2 inch high will build from near james bay 
sunday to quebec and northern new england by monday.


loz063>065-021500-
lake ontario open waters from hamlin beach to the saint lawrence
river-
402 am edt thu jul 2 2026

.today...southwest winds 5 to 15 knots becoming west. waves 1 to
3 feet. 
.tonight...west winds 5 to 15 knots. a chance of showers and
thunderstorms in the evening. waves 1 to 3 feet. 
.friday...west winds 5 to 15 knots. a chance of showers in the
morning, then a chance of showers and thunderstorms in the
afternoon. waves 1 to 2 feet. 
.friday night...west winds 5 to 15 knots. showers likely with a
chance of thunderstorms. waves 1 to 2 feet. 
.saturday...west winds 10 knots or less becoming north. showers
likely during the day, then a chance of showers saturday night.
waves 2 feet or less. 
.sunday...northeast winds 10 knots or less becoming east. a
chance of showers sunday night. waves 1 foot or less. 
.monday...east winds 5 to 10 knots. a chance of showers. waves
1 foot or less. 

winds and waves higher in and near thunderstorms.

$$