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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
403 am edt sun jun 14 2026


slz022-024-141500-
saint lawrence river from cape vincent to saint regis
403 am edt sun jun 14 2026

.today...southwest winds 10 knots or less becoming southeast.
showers with a chance of thunderstorms early, then showers late
this morning. showers with a chance of thunderstorms this
afternoon. 
.tonight...southwest winds 10 knots or less becoming west.
showers with a chance of thunderstorms early, then a chance of
showers late in the evening. 
.monday...west winds 5 to 10 knots becoming southwest. a chance
of showers. 
.monday night...southwest winds 5 to 10 knots. becoming mainly
clear. 
.tuesday...southwest winds 5 to 10 knots becoming south. partly
cloudy. 
.wednesday...south winds 5 to 10 knots. showers likely with a
chance of thunderstorms. 
.thursday...southeast winds 15 to 20 knots becoming southwest.
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 sun jun 14 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 29.4 inch low will send a cold through the lower lakes 
today. following the passage of the front, a 29.9 inch high which will 
build across the region through monday, then exit off to our 
northeast tuesday while weakening to 29.8 inches. a 29.4 inch low 
will then track north of the lake on wednesday, with its trailing 
cold front approaching the lake late in the day on wednesday. a 
second 29.4 inch surface low will pass across the upper great lakes 
thursday, with a warm front, followed by a cold front to sweep 
across the lake throughout the day.


loz062-141500-
lake ontario open waters from the niagara river to hamlin beach-
402 am edt sun jun 14 2026

.today...southwest winds 5 to 15 knots becoming west. a chance of
showers early, then showers with a chance of thunderstorms from
late morning on. waves 1 to 2 feet. 
.tonight...west winds 10 to 15 knots increasing to 15 to
20 knots. a chance of showers early. waves 2 feet or less
building to 3 to 5 feet. 
.monday...west winds 15 to 20 knots becoming southwest 10 to
15 knots. waves 3 to 5 feet subsiding to 1 to 3 feet. 
.monday night...southwest winds 10 to 15 knots. waves 1 to
2 feet. 
.tuesday...southwest winds 10 to 15 knots becoming south. a
chance of showers tuesday night. waves 1 to 3 feet. 
.wednesday...south winds 10 to 15 knots becoming southeast 15 to
20 knots. a chance of showers during the day, then showers
wednesday night. waves 1 to 3 feet. 
.thursday...south winds to 30 knots becoming west. showers during
the day, then a chance of showers thursday night. waves 5 to
8 feet building to 7 to 10 feet, then subsiding to 5 to 8 feet.
waves occasionally around 13 feet. 

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 sun jun 14 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 29.4 inch low will send a cold through the lower lakes 
today. following the passage of the front, a 29.9 inch high which will 
build across the region through monday, then exit off to our 
northeast tuesday while weakening to 29.8 inches. a 29.4 inch low 
will then track north of the lake on wednesday, with its trailing 
cold front approaching the lake late in the day on wednesday. a 
second 29.4 inch surface low will pass across the upper great lakes 
thursday, with a warm front, followed by a cold front to sweep 
across the lake throughout the day.


loz063>065-141500-
lake ontario open waters from hamlin beach to the saint lawrence
river-
402 am edt sun jun 14 2026

.today...southwest winds 5 to 15 knots becoming northeast. a
chance of showers and thunderstorms late this morning. showers
with a chance of thunderstorms this afternoon. waves 2 feet or
less. 
.tonight...northwest winds 10 to 15 knots becoming west 15 to
20 knots. showers with a chance of thunderstorms early, then a
chance of showers late in the evening. waves 1 to 3 feet building
to 3 to 6 feet. 
.monday...west winds 15 to 20 knots. waves 3 to 6 feet. 
.monday night...west winds 15 to 20 knots becoming southwest
10 to 15 knots. waves 3 to 5 feet subsiding to 1 to 3 feet. 
.tuesday...southwest winds 5 to 15 knots becoming south. waves
2 feet or less. 
.wednesday...south winds 5 to 15 knots increasing to 15 to
20 knots. showers likely. waves 2 feet or less building to 2 to
4 feet. 
.thursday...south winds to 30 knots becoming west. showers during
the day, then a chance of showers thursday night. waves 5 to
8 feet building to 7 to 10 feet. waves occasionally around
13 feet. 

winds and waves higher in and near thunderstorms.

$$