fzus61 kbuf 252003
glflo 
expires:202607260300;;595470

open lake forecast for lake ontario
national weather service buffalo ny
402 pm edt sat jul 25 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 high off the new england coast will
slowly weaken as it drifts to the gulf of saint lawrence sunday. a 
29.5 inch low will develop over the western great lakes sunday night 
into monday, before strengthening to 29.3 inches while moving 
southeast into the lower great lakes monday night and tuesday. a 
cold front associated with this low will swing across the lake late 
tuesday and tuesday night. the low will then weaken to 29.6 inches 
while drifting east into new england by wednesday.


loz063>065-260300-
lake ontario open waters from hamlin beach to the saint lawrence
river-
402 pm edt sat jul 25 2026

.tonight...northeast winds 10 to 15 knots becoming southwest
10 knots or less. a chance of showers late this evening. waves
2 feet or less. 
.sunday...southwest winds 10 knots or less. waves 1 foot or less.
.sunday night...south winds 10 knots or less becoming southwest.
a chance of showers. waves 1 foot or less. 
.monday...southwest winds 10 knots or less becoming east. a
chance of showers in the afternoon. waves 1 foot or less. 
.monday night...southeast winds 10 knots or less. a chance of
showers in the evening, then showers likely with a chance of
thunderstorms overnight. waves 1 foot or less. 
.tuesday...southeast winds 5 to 15 knots becoming northeast 15 to
20 knots. showers with a chance of thunderstorms. waves 2 feet or
less building to 2 to 4 feet. 
.wednesday...northeast winds 15 to 20 knots becoming north 10 to
15 knots. a chance of showers and thunderstorms. waves 2 to
4 feet subsiding to 1 to 3 feet. 
.thursday...north winds 5 to 15 knots becoming northwest. waves
2 feet or less. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kbuf 252003
glfsl 
expires:202607260300;;595559

forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
403 pm edt sat jul 25 2026


slz022-024-260300-
saint lawrence river from cape vincent to saint regis
403 pm edt sat jul 25 2026

.tonight...west winds 10 knots or less becoming south. partly
cloudy early, then becoming mostly cloudy. 
.sunday...south winds 10 knots or less becoming southwest. a
chance of showers and thunderstorms in the afternoon. 
.sunday night...southwest winds less than 10 knots. a chance of
showers overnight. 
.monday...south winds less than 10 knots becoming southwest. a
chance of showers in the morning, then showers likely with a
chance of thunderstorms in the afternoon. 
.monday night...light and variable winds. showers likely with a
chance of thunderstorms in the evening, then a chance of showers
overnight. 
.tuesday...southeast winds 10 knots or less becoming northeast.
showers with a chance of thunderstorms. 
.wednesday...northeast winds 5 to 10 knots becoming north.
showers likely with a chance of thunderstorms. 
.thursday...north winds 5 to 10 knots becoming light and
variable. a chance of showers. 

winds and waves higher in and near thunderstorms.

$$