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Latest Great Lakes Marine Forecast by KBUF
Issued 5/7/2026 10:03 PM America/New_York.
Valid through 5/8/2026 5:00 AM America/New_York.
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glfsl
expires:202605080900;;193553
forecast for the saint lawrence river
including the thousand islands region
national weather service buffalo ny
1003 pm edt thu may 7 2026
slz022-024-080900-
saint lawrence river from cape vincent to saint regis
1003 pm edt thu may 7 2026
.overnight...southwest winds 10 knots or less becoming
west. partly cloudy.
.friday...west winds 10 knots or less becoming southwest 10 to
15 knots. partly sunny.
.friday night...southwest winds 10 knots or less becoming south.
partly cloudy.
.saturday...south winds 5 to 10 knots. mostly sunny.
.saturday night...south winds 5 to 15 knots becoming southwest.
showers likely.
.sunday...southwest winds 5 to 15 knots becoming west less than
10 knots. a chance of rain showers during the day.
.monday...west winds 10 knots or less becoming northwest. a
chance of rain showers.
.tuesday...northwest winds less than 10 knots. partly cloudy.
$$
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Latest Great Lakes Marine Forecast by KBUF
Issued 5/7/2026 10:02 PM America/New_York.
Valid through 5/8/2026 5:00 AM America/New_York.
fzus61 kbuf 080202
glflo
expires:202605080900;;193529
open lake forecast for lake ontario
national weather service buffalo ny
1002 pm edt thu may 7 2026
for waters beyond five nautical miles of shore on lake ontario
waves are the significant wave height - the average of the highest
1/3 of the wave spectrum. occasional wave height is the average of
the highest 1/10 of the wave spectrum.
.synopsis...a broad area of high pressure averaging 29.8 inches will
build from the ohio valley tonight to off the mid atlantic coast by
friday night. a 29.5 inch low will then move from the upper great
lakes saturday to central quebec sunday before weakening over
northern quebec monday. a 30.3 inch high is then forecast to build
from northwest ontario province monday to the central great lakes
tuesday.
loz062-080900-
lake ontario open waters from the niagara river to hamlin beach-
1002 pm edt thu may 7 2026
.rest of tonight...west winds 10 knots or less. a chance of rain
showers late this evening. waves 1 foot or less.
.friday...west winds 5 to 10 knots becoming south. waves 1 foot
or less.
.friday night...south winds 5 to 10 knots. waves 2 feet or less.
.saturday...south winds 5 to 15 knots. a chance of showers in the
afternoon. waves 2 feet or less.
.saturday night...south winds 10 to 15 knots becoming west. a
chance of showers. waves 1 to 3 feet.
.sunday...west winds 5 to 15 knots becoming northwest. waves 1 to
3 feet.
.monday...northwest winds 5 to 10 knots. waves 2 feet or less.
.tuesday...northwest winds 5 to 10 knots becoming southeast. a
chance of showers tuesday night. waves 1 foot or less.
$$
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Latest Great Lakes Marine Forecast by KBUF
Issued 5/7/2026 10:02 PM America/New_York.
Valid through 5/8/2026 5:00 AM America/New_York.
fzus61 kbuf 080202
glflo
expires:202605080900;;193530
open lake forecast for lake ontario
national weather service buffalo ny
1002 pm edt thu may 7 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 broad area of high pressure averaging 29.8 inches will
build from the ohio valley tonight to off the mid atlantic coast by
friday night. a 29.5 inch low will then move from the upper great
lakes saturday to central quebec sunday before weakening over
northern quebec monday. a 30.3 inch high is then forecast to build
from northwest ontario province monday to the central great lakes
tuesday.
loz063>065-080900-
lake ontario open waters from hamlin beach to the saint lawrence
river-
1002 pm edt thu may 7 2026
.rest of tonight...west winds 5 to 10 knots. a chance of showers.
waves 2 feet or less.
.friday...west winds 5 to 15 knots becoming southwest. waves
2 feet or less.
.friday night...south winds 5 to 10 knots. waves 2 feet or less.
.saturday...south winds 5 to 15 knots becoming southeast. a
chance of showers in the afternoon. waves 2 feet or less.
.saturday night...south winds 10 to 15 knots becoming west 15 to
20 knots. showers likely. waves 1 to 3 feet building to 2 to
4 feet.
.sunday...west winds 15 to 20 knots becoming northwest 5 to
15 knots. a chance of showers during the day. waves 2 to 4 feet
subsiding to 1 foot or less.
.monday...northwest winds 5 to 15 knots. waves 1 to 3 feet.
.tuesday...northwest winds 5 to 15 knots becoming south. waves
2 feet or less.
$$
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Latest Great Lakes Marine Forecast by KCLE
Issued 5/7/2026 9:31 PM America/New_York.
Valid through 5/8/2026 4:15 AM America/New_York.
fzus61 kcle 080131
glfle
expires:202605080815;;192809
open lake forecast for lake erie
national weather service cleveland oh
931 pm edt thu may 7 2026
for waters beyond five nautical miles of shore on lake erie
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...
pressure steady at 29.90 inches will hold over lake erie into
friday. a weak low pressure 29.70 inches will track across the
upper ohio valley and near the southern lakeshore of lake erie
friday night through saturday morning. a stronger low pressure
29.35 inches will lift northeast from the upper great lakes
towards quebec canada saturday night, dragging a cold front across
lake erie. high pressure 30.10 inches will build across the great
lakes sunday into monday.
lez061-168-169-080815-
ripley to buffalo ny extending from 5nm off shoreline to us-
canadian border-geneva-on-the-
lake to conneaut oh beyond 5 nm off shoreline to us-
canadian border-
conneaut oh to ripley ny beyond 5 nm off shoreline to us-
canadian border-
931 pm edt thu may 7 2026
.overnight...west winds 5 to 10 knots becoming southwest. a
slight chance of showers. a chance of showers
late. waves 1 to 2 feet.
.friday...west winds 5 to 10 knots becoming southwest. a chance
of showers early. waves 1 to 2 feet.
.friday night...southwest winds 5 to 10 knots becoming south. a
chance of showers overnight. waves 1 foot or less.
.saturday...south winds 5 to 10 knots becoming southwest. a
chance of showers in the afternoon. waves 1 foot or less.
.saturday night...southwest winds 5 to 15 knots becoming
northwest. a chance of showers. waves 1 to 3 feet.
.sunday...northwest winds 5 to 10 knots becoming north. waves
2 feet or less.
.monday...north winds 5 to 10 knots. waves 2 feet or less.
.tuesday...northwest winds 10 knots or less becoming southeast. a
chance of rain showers tuesday night. waves 1 foot or less.
$$
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