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Latest Great Lakes Marine Forecast by KBUF
Issued 5/9/2026 10:03 AM America/New_York.
Valid through 5/9/2026 5:00 PM America/New_York.
fzus61 kbuf 091403
glfsl
expires:202605092100;;274016
forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
1003 am edt sat may 9 2026
slz022-024-092100-
saint lawrence river from cape vincent to saint regis
1003 am edt sat may 9 2026
.this afternoon...south winds 5 to 10 knots. mostly sunny.
.tonight...south winds 5 to 15 knots becoming southwest. showers.
a chance of showers late.
.sunday...southwest winds 5 to 15 knots. mostly sunny.
.sunday night...southwest winds 5 to 15 knots becoming west less
than 10 knots. partly cloudy in the evening, then becoming mainly
clear.
.monday...west winds less than 10 knots. a chance of rain
showers.
.tuesday...northwest winds less than 10 knots. mainly clear, then
becoming partly cloudy.
.wednesday...southeast winds 5 to 10 knots. a chance of rain
showers.
$$
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Latest Great Lakes Marine Forecast by KBUF
Issued 5/9/2026 10:02 AM America/New_York.
Valid through 5/9/2026 5:00 PM America/New_York.
fzus61 kbuf 091402
glflo
expires:202605092100;;273994
open lake forecast for lake ontario
national weather service buffalo ny
1002 am edt sat may 9 2026
for waters beyond five nautical miles of shore on lake ontario
waves are the significant wave height - the average of the highest
1/3 of the wave spectrum. occasional wave height is the average of
the highest 1/10 of the wave spectrum.
.synopsis...a weak 29.5 inch low will move from the upper great
lakes today to western quebec by early sunday before moving to
northern quebec early monday. meanwhile, a trailing cold front will
cross the lake sunday night. a 30.4 inch high will then build from
the upper great lakes monday to the lower great lakes by tuesday. a
29.8 inch low will move across the lower great lakes into the ohio
valley wednesday.
loz063>065-092100-
lake ontario open waters from hamlin beach to the saint lawrence
river-
1002 am edt sat may 9 2026
.this afternoon...southeast winds 5 to 10 knots. waves 2 feet or
less.
.tonight...south winds 10 to 15 knots becoming west. a chance of
showers early, then showers late in the evening. a chance of
showers after midnight. waves 1 to 3 feet.
.sunday...west winds 10 to 15 knots increasing to 15 to 20 knots.
waves 1 to 3 feet building to 2 to 4 feet.
.sunday night...west winds 5 to 15 knots. waves 1 to 3 feet.
.monday...west winds 5 to 15 knots becoming northwest. waves 1 to
3 feet.
.tuesday...northwest winds 5 to 15 knots becoming southeast. a
chance of rain showers tuesday night. waves 2 feet or less.
.wednesday...southeast winds 10 to 15 knots. showers likely.
waves 1 to 3 feet.
$$
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