483
FZUS61 KBUF 312003
GLFLO

Open Lake Forecast for Lake Ontario
National Weather Service Buffalo NY
402 PM EDT Sun May 31 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 30.2 inch high will move southward across Lake
Erie through tonight. This will allow a back door cold front to clip
the eastern Lake waters through evening, this from a 29.8 inch area
of low pressure that will push south across southern Quebec and New
England through tonight. This low will then push off the New England
coastline on Monday. Another 30.4 inch high centered over Hudson Bay
Monday night will then build south across the entire Great Lakes
region Tuesday and Wednesday, then into the Ohio Valley and lower
Great Lakes by Thursday.

LOZ062-010300-
Lake Ontario open waters from the Niagara River to Hamlin Beach-
402 PM EDT Sun May 31 2026

.TONIGHT...West winds 5 to 15 knots becoming north less than
10 knots. Waves 1 to 2 feet.
.MONDAY...North winds 10 knots or less becoming southeast. Waves
1 foot or less.
.MONDAY NIGHT...East winds less than 10 knots. Waves 1 foot or
less.
.TUESDAY...West winds 10 knots or less. Waves 1 foot or less.
.TUESDAY NIGHT...West winds 5 to 10 knots becoming northwest.
Waves 2 feet or less.
.WEDNESDAY...West winds 5 to 10 knots becoming southwest. Waves
1 foot or less.
.THURSDAY...Southwest winds 5 to 15 knots. Waves 1 to 3 feet.
.FRIDAY...Southwest winds 10 to 15 knots. A chance of showers
Friday night. Waves 1 to 3 feet.

$$

LOZ063>065-010300-
Lake Ontario open waters from Hamlin Beach to the Saint Lawrence
River-
402 PM EDT Sun May 31 2026

.TONIGHT...West winds 15 to 20 knots becoming north 5 to
15 knots. Showers likely early, then a chance of showers late
this evening. Waves 3 to 5 feet subsiding to 1 to 3 feet.
.MONDAY...North winds 5 to 10 knots. Waves 1 foot or less.
.MONDAY NIGHT...North winds 10 knots or less becoming west. Waves
1 foot or less.
.TUESDAY...West winds 10 knots or less. Waves 1 foot or less.
.TUESDAY NIGHT...West winds 5 to 10 knots. Waves 1 foot or less.
.WEDNESDAY...West winds 5 to 10 knots becoming southwest. Waves
2 feet or less.
.THURSDAY...West winds 5 to 15 knots becoming southwest. Waves
2 feet or less.
.FRIDAY...Southwest winds 5 to 15 knots becoming west. A chance
of showers Friday night. Waves 2 feet or less.

$$

LOZ061-010300-
MAFOR 3121/
ONTARIO WEST 1/2 12610 12700 11800 11100 11200 11300. Waves 1 to
3 feet tonight. Waves 1 foot or less Monday.

ONTARIO EAST 1/2 11620 11610 12700 11800 12100 11800. A chance of
showers early this evening. Waves 3 to 5 feet subsiding to 1 to 3
feet tonight. Waves 1 foot or less Monday.

$$