fzus61 kbuf 191404
glfsl 
expires:202607192100;;234264

forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
1004 am edt sun jul 19 2026


slz022-024-192100-
saint lawrence river from cape vincent to saint regis
1004 am edt sun jul 19 2026

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

winds and waves higher in and near thunderstorms.

$$

fzus61 kbuf 191403
glflo 
expires:202607192100;;234251

open lake forecast for lake ontario
national weather service buffalo ny
1003 am edt sun jul 19 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 30.0 inch area of high pressure will build across the great lakes 
from west to east through 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.


loz062-192100-
lake ontario open waters from the niagara river to hamlin beach-
1003 am edt sun jul 19 2026

.this afternoon...northwest winds 5 to 15 knots becoming west.
waves 2 feet or less. 
.tonight...west winds 5 to 15 knots becoming north less than
10 knots. waves 2 feet or less. 
.monday...light and variable winds becoming southeast 5 to
10 knots. 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 building to 3 to
5 feet. 
.wednesday...northwest winds 15 to 25 knots. 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 191403
glflo 
expires:202607192100;;234252

open lake forecast for lake ontario
national weather service buffalo ny
1003 am edt sun jul 19 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 30.0 inch area of high pressure will build across the great lakes 
from west to east through 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>065-192100-
lake ontario open waters from hamlin beach to the saint lawrence
river-
1003 am edt sun jul 19 2026

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

winds and waves higher in and near thunderstorms.

$$