fzus61 kbuf 272003
glflo 
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open lake forecast for lake ontario
national weather service buffalo ny
403 pm edt mon jul 27 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 29.5 inch low over the western central great lakes 
this evening will strengthen to 29.3 inches while moving southeast 
into the lower great lakes tonight 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, before entering the 
northern atlantic thursday and friday. meanwhile a 30.0 inch high 
will slide across the great lakes thursday and friday.


loz062-280300-
lake ontario open waters from the niagara river to hamlin beach-
403 pm edt mon jul 27 2026

.tonight...southeast winds 5 to 15 knots becoming south. a chance
of showers and thunderstorms early, then showers with a chance of
thunderstorms from late evening on. waves 2 feet or less. 
.tuesday...southeast winds 10 to 15 knots becoming north 15 to
20 knots. showers with a chance of thunderstorms through early
afternoon, then a chance of showers and thunderstorms late. waves
1 to 3 feet building to 2 to 4 feet. 
.tuesday night...north winds 15 to 25 knots. showers likely with
a chance of thunderstorms in the evening, then showers likely
overnight. waves 2 to 4 feet building to 3 to 6 feet. 
.wednesday...north winds 15 to 25 knots. showers in the morning,
then showers with a chance of thunderstorms in the afternoon.
waves 3 to 6 feet. 
.wednesday night...north winds 15 to 20 knots. showers with a
chance of thunderstorms in the evening, then showers likely
overnight. waves 2 to 4 feet. 
.thursday...north winds 5 to 15 knots becoming northwest. a
chance of showers during the day. waves 1 to 3 feet subsiding to
1 foot or less. 
.friday...northwest winds less than 10 knots becoming southwest.
waves 1 foot or less. 
.saturday...south winds less than 10 knots. a chance of showers
saturday night. waves 1 foot or less. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kbuf 272003
glflo 
expires:202607280300;;711346

open lake forecast for lake ontario
national weather service buffalo ny
403 pm edt mon jul 27 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 29.5 inch low over the western central great lakes 
this evening will strengthen to 29.3 inches while moving southeast 
into the lower great lakes tonight 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, before entering the 
northern atlantic thursday and friday. meanwhile a 30.0 inch high 
will slide across the great lakes thursday and friday.


loz063>065-280300-
lake ontario open waters from hamlin beach to the saint lawrence
river-
403 pm edt mon jul 27 2026

.tonight...southeast winds 5 to 15 knots becoming south. a chance
of showers and thunderstorms. showers with a chance of
thunderstorms late. waves 2 feet or less. 
.tuesday...south winds 15 to 20 knots becoming northeast. showers
with a chance of thunderstorms. waves 1 to 3 feet building to
2 to 4 feet, then subsiding to 1 to 3 feet. 
.tuesday night...north winds 15 to 25 knots. showers with a
chance of thunderstorms. waves 2 to 4 feet building to 3 to
6 feet. 
.wednesday...north winds 15 to 25 knots. showers in the morning,
then showers with a chance of thunderstorms in the afternoon.
waves 3 to 6 feet. 
.wednesday night...north winds 15 to 20 knots. showers with a
chance of thunderstorms in the evening, then showers overnight.
waves 3 to 5 feet subsiding to 2 to 4 feet. 
.thursday...north winds 15 to 20 knots diminishing to 5 to
15 knots. a chance of showers during the day. waves 2 to 4 feet
subsiding to 1 foot or less. 
.friday...north winds 10 knots or less becoming southwest. waves
1 foot or less. 
.saturday...south winds less than 10 knots. waves 1 foot or less.

winds and waves higher in and near thunderstorms.

$$

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glfsl 
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forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
403 pm edt mon jul 27 2026


slz022-024-280300-
saint lawrence river from cape vincent to saint regis
403 pm edt mon jul 27 2026

.tonight...south winds less than 10 knots. patchy fog after
midnight. 
.tuesday...southeast winds less than 10 knots becoming east. a
chance of showers early, then showers with a chance of
thunderstorms from late morning on. 
.tuesday night...east winds 5 to 15 knots becoming northeast.
showers with a chance of thunderstorms. 
.wednesday...northeast winds 5 to 15 knots. showers in the
morning, then showers with a chance of thunderstorms in the
afternoon. 
.wednesday night...northeast winds 5 to 15 knots. showers with a
chance of thunderstorms in the evening, then showers likely
overnight. 
.thursday...north winds 10 knots or less. a chance of showers. 
.friday...northeast winds less than 10 knots. becoming mainly
clear. 
.saturday...south winds less than 10 knots. a chance of showers
saturday night. 

winds and waves higher in and near thunderstorms.

$$