fzus61 kbuf 202003
glfsl 
expires:202606210300;;087241

forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
403 pm edt sat jun 20 2026


slz022-024-210300-
saint lawrence river from cape vincent to saint regis
403 pm edt sat jun 20 2026

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

winds and waves higher in and near thunderstorms.

$$

fzus61 kbuf 202002
glflo 
expires:202606210300;;087214

open lake forecast for lake ontario
national weather service buffalo ny
402 pm edt sat jun 20 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...an unseasonably strong 29.2 inch low will linger over 
the canadian maritimes through this evening before exiting eastward 
over the atlantic. a weak ridge of high pressure averaging 29.9 
inches will then build over the great lakes tonight through 
tomorrow. a 29.7 inch low is then forecast to move south of the 
lower great lakes monday and monday night, before moving off the new 
england coast by tuesday. a broad area of high pressure averaging 
30.1 inches will advance over the eastern great lakes region 
wednesday and thursday of next week.


loz062-210300-
lake ontario open waters from the niagara river to hamlin beach-
402 pm edt sat jun 20 2026

.tonight...west winds 5 to 15 knots becoming northwest 10 knots
or less. a chance of showers after midnight. waves 1 to 3 feet
subsiding to 1 foot or less. 
.sunday...west winds 5 to 10 knots becoming southwest. waves
1 foot or less. 
.sunday night...west winds less than 10 knots becoming southeast.
waves 1 foot or less. 
.monday...east winds 10 knots or less increasing to 10 to
15 knots. a chance of showers. waves 2 feet or less. 
.monday night...east winds 5 to 15 knots becoming north. a chance
of showers in the evening. waves 1 to 2 feet. 
.tuesday...northwest winds 5 to 10 knots. waves 1 foot or less. 
.wednesday...west winds less than 10 knots becoming south. a
chance of showers wednesday night. waves 1 foot or less. 
.thursday...east winds 10 knots or less becoming southwest. a
chance of showers. waves 1 foot or less. 

$$

fzus61 kbuf 202002
glflo 
expires:202606210300;;087215

open lake forecast for lake ontario
national weather service buffalo ny
402 pm edt sat jun 20 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...an unseasonably strong 29.2 inch low will linger over 
the canadian maritimes through this evening before exiting eastward 
over the atlantic. a weak ridge of high pressure averaging 29.9 
inches will then build over the great lakes tonight through 
tomorrow. a 29.7 inch low is then forecast to move south of the 
lower great lakes monday and monday night, before moving off the new 
england coast by tuesday. a broad area of high pressure averaging 
30.1 inches will advance over the eastern great lakes region 
wednesday and thursday of next week.


loz063>065-210300-
lake ontario open waters from hamlin beach to the saint lawrence
river-
402 pm edt sat jun 20 2026

.tonight...west winds 15 to 20 knots diminishing to 5 to
10 knots. a chance of showers early. a chance of showers late.
waves 3 to 5 feet subsiding to 1 to 3 feet. 
.sunday...west winds 5 to 10 knots. waves 2 feet or less. 
.sunday night...west winds 10 knots or less becoming south. waves
1 foot or less. 
.monday...southeast winds 5 to 10 knots. showers likely. waves
1 foot or less. 
.monday night...east winds 5 to 10 knots becoming north. showers
likely in the evening, then a chance of showers overnight. waves
1 foot or less. 
.tuesday...northwest winds 5 to 10 knots. waves 2 feet or less. 
.wednesday...west winds 10 knots or less becoming south. a chance
of showers wednesday night. waves 1 foot or less. 
.thursday...southeast winds 10 knots or less becoming southwest.
a chance of showers during the day, then showers likely thursday
night. waves 1 foot or less. 

$$