fzus61 kbuf 062003
glflo 
expires:202608070300;;731200

open lake forecast for lake ontario
national weather service buffalo ny
403 pm edt thu aug 6 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 30.3 inch high off the mid-alantic will drift south 
and southeast while weakening to 30.2 inches through saturday. 
meanwhile, a 29.4 inch low over northeastern manitoba will slowly 
track east over the hudson bay and weaken to 29.6 inches by saturday 
while sending its cold front through the region. a 30.1 inch high 
over the southeast will then nose in over lake ontario sunday 
followed by a 29.7 inch low that will pass by to the north of the 
lake monday through tuesday.


loz062-070300-
lake ontario open waters from the niagara river to hamlin beach-
403 pm edt thu aug 6 2026

.tonight...southwest winds 10 knots or less. waves 1 foot or
less. 
.friday...light and variable winds. a chance of showers in the
morning, then showers likely early in the afternoon. showers
likely with a chance of thunderstorms late. waves 1 foot or less.
.friday night...southeast winds 10 knots or less becoming
southwest. a chance of showers. waves 1 foot or less. 
.saturday...southwest winds 5 to 15 knots. a chance of showers in
the morning, then a chance of showers and thunderstorms in the
afternoon. waves 1 to 2 feet. 
.saturday night...southwest winds 10 to 15 knots becoming west. a
chance of showers and thunderstorms in the evening, then a chance
of showers overnight. waves 1 to 2 feet. 
.sunday...west winds 5 to 10 knots becoming southwest. a chance
of showers sunday night. waves 2 feet or less. 
.monday...southwest winds 5 to 10 knots. a chance of showers and
thunderstorms during the day, then showers likely with a chance
of thunderstorms monday night. waves 1 to 2 feet. 
.tuesday...west winds 5 to 10 knots. showers likely with a chance
of thunderstorms during the day, then a chance of showers tuesday
night. waves 1 to 3 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kbuf 062003
glflo 
expires:202608070300;;731201

open lake forecast for lake ontario
national weather service buffalo ny
403 pm edt thu aug 6 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 30.3 inch high off the mid-alantic will drift south 
and southeast while weakening to 30.2 inches through saturday. 
meanwhile, a 29.4 inch low over northeastern manitoba will slowly 
track east over the hudson bay and weaken to 29.6 inches by saturday 
while sending its cold front through the region. a 30.1 inch high 
over the southeast will then nose in over lake ontario sunday 
followed by a 29.7 inch low that will pass by to the north of the 
lake monday through tuesday.


loz063>065-070300-
lake ontario open waters from hamlin beach to the saint lawrence
river-
403 pm edt thu aug 6 2026

.tonight...southwest winds 10 knots or less. waves 1 foot or
less. 
.friday...southwest winds less than 10 knots becoming east. a
chance of showers early in the afternoon. showers likely with a
chance of thunderstorms late. waves 1 foot or less. 
.friday night...light and variable winds becoming south 5 to
10 knots. a chance of showers and thunderstorms in the evening,
then a chance of showers overnight. waves 1 foot or less. 
.saturday...southwest winds 5 to 15 knots. a chance of showers in
the morning, then a chance of showers and thunderstorms in the
afternoon. waves 2 feet or less. 
.saturday night...southwest winds 10 to 15 knots becoming west. a
chance of showers and thunderstorms in the evening, then a chance
of showers overnight. waves 1 to 3 feet. 
.sunday...west winds 5 to 15 knots becoming southwest. waves 1 to
3 feet. 
.monday...southwest winds 5 to 10 knots. a chance of showers and
thunderstorms during the day, then showers likely with a chance
of thunderstorms monday night. waves 1 to 2 feet. 
.tuesday...west winds 5 to 10 knots. showers likely with a chance
of thunderstorms during the day, then a chance of showers tuesday
night. waves 1 to 3 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kbuf 062003
glfsl 
expires:202608070300;;731268

forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
403 pm edt thu aug 6 2026


slz022-024-070300-
saint lawrence river from cape vincent to saint regis
403 pm edt thu aug 6 2026

.tonight...southwest winds 5 to 10 knots becoming light and
variable. partly cloudy. 
.friday...light and variable winds. partly to mostly sunny. 
.friday night...light and variable winds. a chance of showers in
the evening, then showers likely overnight. 
.saturday...south winds 10 knots or less becoming southwest.
showers likely in the morning, then showers likely with a chance
of thunderstorms in the afternoon. 
.saturday night...southwest winds 5 to 10 knots. showers likely
with a chance of thunderstorms. 
.sunday...west winds 10 knots or less becoming southwest. mainly
clear, then becoming partly cloudy. 
.monday...southwest winds 10 knots or less. showers likely with a
chance of thunderstorms. 
.tuesday...west winds less than 10 knots. showers likely with a
chance of thunderstorms during the day, then a chance of showers
and thunderstorms tuesday night. 

winds and waves higher in and near thunderstorms.

$$