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open lake forecast for lake ontario
national weather service buffalo ny
258 pm 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 front through the lower 
great lakes this afternoon. following the passage of the front, a 
29.9 inch high 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>065-142115-
lake ontario open waters from hamlin beach to the saint lawrence
river-
258 pm edt sun jun 14 2026

...severe thunderstorm watch 334 in effect until 10 pm edt this
evening...

.this afternoon...east winds 5 to 10 knots becoming north and
increasing to 15 to 20 knots. showers with a chance of
thunderstorms. some thunderstorms may be severe with strong winds
and large hail. waves 1 foot or less. 
.tonight...southeast winds 15 to 25 knots becoming northwest.
showers with a chance of thunderstorms early, then a chance of
showers late in the evening. some thunderstorms may be severe
with strong winds and large hail. 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 5 to
15 knots. waves 3 to 5 feet subsiding to 1 to 3 feet. 
.tuesday...south winds 5 to 15 knots. waves 2 feet or less. 
.wednesday...south winds 5 to 15 knots becoming southeast 15 to
20 knots. showers likely with a chance of thunderstorms. waves
2 feet or less building to 2 to 4 feet. 
.thursday...southeast winds to 30 knots becoming west. showers
with a chance of thunderstorms 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.

$$

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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
1003 am edt sun jun 14 2026


slz022-024-142100-
saint lawrence river from cape vincent to saint regis
1003 am edt sun jun 14 2026

.rest of today...southwest winds 10 knots or less becoming
southeast. showers late this morning, then 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.

$$