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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
1002 am edt sun jul 5 2026


slz022-024-052100-
saint lawrence river from cape vincent to saint regis
1002 am edt sun jul 5 2026

.this afternoon...north winds 10 knots or less becoming northeast.
mostly sunny. 
.tonight...northeast winds 10 knots or less. mostly cloudy. 
.monday...northeast winds 10 knots or less becoming east. partly
sunny. 
.monday night...east winds less than 10 knots. partly cloudy. 
.tuesday...east winds less than 10 knots. partly cloudy. 
.wednesday...southwest winds 10 knots or less. partly cloudy. 
.thursday...southwest winds 10 knots or less. showers likely. 

$$

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open lake forecast for lake ontario
national weather service buffalo ny
1002 am edt sun jul 5 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 30.2 inch surface will build from hudson bay today to 
quebec and northern new england monday, then east of the canadian 
maritimes by tuesday. meanwhile, a weak 29.9 inch low will develop 
over ohio today and move to the mid atlantic by late monday. a 
broad 30.1 inch high is then forecast to build into the great lakes 
tuesday through wednesday, then drift off the east coast thursday.


loz062-052100-
lake ontario open waters from the niagara river to hamlin beach-
1002 am edt sun jul 5 2026

.this afternoon...east winds 10 to 15 knots. waves 1 foot or less.
.tonight...northeast winds 5 to 15 knots. waves 2 feet or less. 
.monday...northeast winds 10 to 15 knots becoming east 15 to
20 knots. a chance of showers. waves 2 to 4 feet. 
.monday night...east winds 15 to 20 knots diminishing to 10 to
15 knots. a chance of showers. waves 2 to 4 feet. 
.tuesday...east winds 5 to 15 knots becoming northeast less than
10 knots. waves 1 to 3 feet subsiding to 1 foot or less. 
.wednesday...east winds 10 knots or less becoming southwest.
waves 1 foot or less. 
.thursday...southwest winds 5 to 15 knots becoming west. a chance
of showers and thunderstorms. waves 1 to 2 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kbuf 051402
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open lake forecast for lake ontario
national weather service buffalo ny
1002 am edt sun jul 5 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 30.2 inch surface will build from hudson bay today to 
quebec and northern new england monday, then east of the canadian 
maritimes by tuesday. meanwhile, a weak 29.9 inch low will develop 
over ohio today and move to the mid atlantic by late monday. a 
broad 30.1 inch high is then forecast to build into the great lakes 
tuesday through wednesday, then drift off the east coast thursday.


loz063>065-052100-
lake ontario open waters from hamlin beach to the saint lawrence
river-
1002 am edt sun jul 5 2026

.this afternoon...northeast winds 5 to 10 knots. waves 1 foot or
less. 
.tonight...northeast winds 5 to 15 knots becoming east. waves
2 feet or less. 
.monday...east winds 5 to 15 knots. a chance of showers. waves
1 to 3 feet. 
.monday night...east winds 10 to 15 knots. a chance of showers.
waves 1 to 3 feet. 
.tuesday...east winds 5 to 15 knots becoming southeast. a chance
of showers during the day. waves 2 feet or less. 
.wednesday...southeast winds 5 to 10 knots becoming southwest.
waves 1 foot or less. 
.thursday...southwest winds 5 to 10 knots becoming west. a chance
of showers and thunderstorms during the day, then showers likely
with a chance of thunderstorms thursday night. waves 1 foot or
less. 

winds and waves higher in and near thunderstorms.

$$

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open lake forecast for lake erie
national weather service cleveland oh
957 am edt sun jul 5 2026

for waters beyond five nautical miles of shore on lake erie

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...
low pressure 29.90 inches will slowly drift east across the upper
ohio valley through monday night, before exiting on tuesday. high
pressure 30.10 inches builds in by wednesday. a cold front 
approaches the lake from the northwest on thursday.


lez061-168-169-052015-
ripley to buffalo ny extending from 5nm off shoreline to us-
canadian border-geneva-on-the-
lake to conneaut oh beyond 5 nm off shoreline to us-
canadian border-
conneaut oh to ripley ny beyond 5 nm off shoreline to us-
canadian border-
957 am edt sun jul 5 2026

.this afternoon...northeast winds 5 to 15 knots. a chance of
showers with a slight chance of thunderstorms. waves 2 feet or
less. 
.tonight...northeast winds 10 to 15 knots increasing to 15 to
20 knots. a chance of showers with a slight chance of
thunderstorms. waves 1 to 3 feet building to 3 to 5 feet. 
.monday...northeast winds 15 to 20 knots. a chance of showers in
the morning, then a chance of showers and thunderstorms in the
afternoon. waves 3 to 5 feet subsiding to 2 to 4 feet. 
.monday night...northeast winds 15 to 20 knots becoming east
10 to 15 knots. a chance of showers and thunderstorms. waves 2 to
4 feet subsiding to 1 to 3 feet. 
.tuesday...northeast winds 10 knots or less. a chance of showers
and thunderstorms during the day. waves 2 feet or less. 
.wednesday...north winds 10 knots or less becoming south. waves
1 foot or less. 
.thursday...southwest winds 5 to 15 knots becoming west. a chance
of showers and thunderstorms during the day, then showers likely
with a chance of thunderstorms thursday night. waves 1 to 2 feet.

winds and waves higher in and near thunderstorms.

$$