fzus61 kbuf 190204
glfsl 
expires:202607190900;;207899

forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
1004 pm edt sat jul 18 2026


slz022-024-190900-
saint lawrence river from cape vincent to saint regis
1004 pm edt sat jul 18 2026

.overnight...northwest winds 5 to 15 knots. patchy smoke. 
.sunday...northwest winds 5 to 10 knots. patchy smoke early. 
.sunday night...northwest winds 5 to 10 knots becoming light and
variable. mainly clear. 
.monday...light and variable winds becoming southwest 5 to
10 knots. mostly sunny. 
.monday night...southwest winds 10 knots or less becoming south.
mostly cloudy. 
.tuesday...south winds 5 to 15 knots. showers with a chance of
thunderstorms. 
.wednesday...southwest winds 5 to 15 knots becoming west. showers
likely during the day, then a chance of showers wednesday night. 
.thursday...west winds 5 to 10 knots becoming light and variable.
becoming mainly clear. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kbuf 190203
glflo 
expires:202607190900;;207882

open lake forecast for lake ontario
national weather service buffalo ny
1003 pm edt sat jul 18 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 secondary cold front will cross lake ontario tonight. a 30.0 
inch area of high pressure will build across the great lakes 
from west to east sunday into monday, followed by a warm front 
crossing the lake monday night and another cold front tuesday 
night, with these fronts attached to a 29.4 inch area of low 
pressure near james bay. a secondary cold front will cross the 
lake wednesday, with a 30.1 inch high building across the lower 
great lakes region wednesday night through friday.


loz062-190900-
lake ontario open waters from the niagara river to hamlin beach-
1003 pm edt sat jul 18 2026

.overnight...northwest winds 15 to 20 knots becoming north.
patchy smoke. waves 3 to 5 feet subsiding to 2 to 4 feet. 
.sunday...north winds 5 to 15 knots becoming west. patchy smoke
early. waves 1 to 3 feet subsiding to 1 foot or less. 
.sunday night...west winds 10 knots or less becoming northwest.
waves 1 foot or less. 
.monday...southwest winds 10 knots or less becoming south. waves
1 foot or less. 
.monday night...southeast winds 5 to 15 knots becoming south.
waves 2 feet or less. 
.tuesday...south winds 15 to 20 knots becoming west. showers with
a chance of thunderstorms. waves 2 to 4 feet. 
.wednesday...west winds 15 to 25 knots becoming northwest. a
chance of showers during the day. waves 3 to 6 feet building to
4 to 7 feet, then subsiding to 3 to 5 feet. waves occasionally
around 9 feet. 
.thursday...northwest winds 5 to 15 knots becoming southwest.
waves 1 to 3 feet subsiding to 1 foot or less. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kbuf 190203
glflo 
expires:202607190900;;207883

open lake forecast for lake ontario
national weather service buffalo ny
1003 pm edt sat jul 18 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 secondary cold front will cross lake ontario tonight. a 30.0 
inch area of high pressure will build across the great lakes 
from west to east sunday into monday, followed by a warm front 
crossing the lake monday night and another cold front tuesday 
night, with these fronts attached to a 29.4 inch area of low 
pressure near james bay. a secondary cold front will cross the 
lake wednesday, with a 30.1 inch high building across the lower 
great lakes region wednesday night through friday.


loz063>065-190900-
lake ontario open waters from hamlin beach to the saint lawrence
river-
1003 pm edt sat jul 18 2026

.overnight...northwest winds 15 to 20 knots becoming north.
patchy smoke. waves 4 to 7 feet subsiding to 3 to 6 feet. waves
occasionally around 9 feet. 
.sunday...north winds 15 to 20 knots becoming west 5 to 15 knots.
patchy smoke early. waves 2 to 4 feet subsiding to 1 to 3 feet. 
.sunday night...west winds 5 to 15 knots. waves 1 to 3 feet. 
.monday...west winds 10 knots or less becoming southeast. waves
1 foot or less. 
.monday night...southeast winds 10 knots or less becoming south
and increasing to 15 to 20 knots overnight. waves 1 to 3 feet. 
.tuesday...south winds 15 to 20 knots becoming southwest. showers
with a chance of thunderstorms. waves 2 to 4 feet. 
.wednesday...west winds 15 to 25 knots. showers likely during the
day, then a chance of showers wednesday night. waves 3 to 6 feet
building to 5 to 8 feet, then subsiding to 3 to 6 feet. waves
occasionally around 10 feet. 
.thursday...northwest winds 5 to 15 knots becoming west. waves
2 to 4 feet subsiding to 1 foot or less. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kbuf 182307
glflo 
expires:202607190915;;201711

open lake forecast for lake ontario
national weather service buffalo ny
707 pm edt sat jul 18 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 secondary cold front will cross lake ontario tonight. a 30.0 
inch area of high pressure will build across the great lakes 
from west to east sunday into monday, followed by a warm front 
crossing the lake monday night and another cold front tuesday 
night, with these fronts attached to a 29.4 inch area of low 
pressure near james bay. a secondary cold front will cross the 
lake wednesday, with a 30.1 inch high building across the lower 
great lakes region wednesday night through friday.


loz064-190915-
lake ontario open waters from sodus bay to mexico bay-
707 pm edt sat jul 18 2026

...severe thunderstorm watch 494 in effect until 9 pm edt this
evening...

.rest of tonight...west winds 15 to 20 knots becoming north. a
chance of showers this evening. waves 4 to 7 feet subsiding to
3 to 5 feet. waves occasionally around 9 feet. 
.sunday...north winds 15 to 20 knots becoming west 10 to
15 knots. waves 2 to 4 feet subsiding to 1 to 3 feet. 
.sunday night...west winds 5 to 15 knots. waves 1 to 3 feet. 
.monday...west winds 5 to 10 knots becoming south. waves 1 foot
or less. 
.monday night...southeast winds 10 knots or less becoming south
and increasing to 15 to 20 knots overnight. waves 1 to 3 feet. 
.tuesday...south winds 15 to 20 knots becoming southwest. showers
with a chance of thunderstorms. waves 2 to 4 feet. 
.wednesday...west winds 15 to 25 knots. showers likely during the
day, then a chance of showers wednesday night. waves 3 to 6 feet
building to 4 to 7 feet, then subsiding to 3 to 6 feet. waves
occasionally around 9 feet. 
.thursday...northwest winds 5 to 15 knots becoming west. waves
2 to 4 feet subsiding to 1 to 2 feet. 

winds and waves higher in and near thunderstorms.

$$

fzus61 kbuf 182307
glflo 
expires:202607190915;;201710

open lake forecast for lake ontario
national weather service buffalo ny
707 pm edt sat jul 18 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 secondary cold front will cross lake ontario tonight. a 30.0 
inch area of high pressure will build across the great lakes 
from west to east sunday into monday, followed by a warm front 
crossing the lake monday night and another cold front tuesday 
night, with these fronts attached to a 29.4 inch area of low 
pressure near james bay. a secondary cold front will cross the 
lake wednesday, with a 30.1 inch high building across the lower 
great lakes region wednesday night through friday.


loz063-065-190915-
lake ontario open waters from hamlin beach to sodus bay-
lake ontario open waters from mexico bay to the saint lawrence
river-
707 pm edt sat jul 18 2026

.rest of tonight...west winds 15 to 20 knots becoming north. a
chance of showers early. waves 4 to 7 feet subsiding to 3 to
6 feet. waves occasionally around 9 feet. 
.sunday...north winds 15 to 20 knots becoming west 5 to 15 knots.
waves 2 to 4 feet subsiding to 1 to 3 feet. 
.sunday night...west winds 5 to 15 knots. waves 1 to 3 feet. 
.monday...west winds 10 knots or less becoming southeast. waves
1 foot or less. 
.monday night...southeast winds 10 knots or less becoming south
and increasing to 15 to 20 knots overnight. waves 1 to 3 feet. 
.tuesday...south winds 15 to 20 knots becoming southwest. showers
with a chance of thunderstorms. waves 2 to 4 feet. 
.wednesday...west winds 15 to 25 knots becoming northwest.
showers likely during the day, then a chance of showers wednesday
night. waves 3 to 6 feet building to 5 to 8 feet, then subsiding
to 3 to 6 feet. waves occasionally around 10 feet. 
.thursday...northwest winds 5 to 15 knots becoming west. waves
2 to 4 feet subsiding to 1 foot or less. 

winds and waves higher in and near thunderstorms.

$$