FZUS61 KBUF 212002
GLFLO

Open Lake Forecast for Lake Ontario
National Weather Service Buffalo NY
402 PM EDT Sun Jun 21 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 broad area of high pressure will settle east
of the Lake tonight. In its wake 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 Tuesday and Wednesday, before exiting east into New
England on Thursday as a weak 29.8 inch low moves east into the
central Great Lakes. This low is forecasted to move north of the
Lake Friday, with its associated weak cold front crossing the Lake.

LOZ062-220300-
Lake Ontario open waters from the Niagara River to Hamlin Beach-
402 PM EDT Sun Jun 21 2026

.TONIGHT...West winds 5 to 10 knots becoming light and variable.
A chance of showers late. Waves 1 foot or less.
.MONDAY...East winds 5 to 15 knots becoming northeast. Showers.
Waves 2 feet or less building to 2 to 3 feet.
.MONDAY NIGHT...Northeast winds 5 to 15 knots becoming west
10 knots or less. A chance of showers in the evening. Waves 1 to
3 feet.
.TUESDAY...West winds 5 to 10 knots. Waves 1 foot or less.
.TUESDAY NIGHT...West winds 5 to 10 knots becoming northwest.
Waves 2 feet or less.
.WEDNESDAY...West winds less than 10 knots becoming south. Waves
1 foot or less.
.THURSDAY...Southeast winds 10 knots or less becoming southwest.
A chance of showers and thunderstorms. Waves 1 foot or less.
.FRIDAY...Southwest winds 5 to 10 knots becoming west. A chance
of showers during the day. Waves 1 foot or less.

Winds and waves higher in and near thunderstorms.

$$

LOZ063>065-220300-
Lake Ontario open waters from Hamlin Beach to the Saint Lawrence
River-
402 PM EDT Sun Jun 21 2026

.TONIGHT...West winds 5 to 10 knots becoming south. Waves 2 feet
or less.
.MONDAY...Southeast winds 5 to 15 knots becoming northeast 15 to
20 knots. A chance of showers early, then showers from late
morning on. Waves 1 to 3 feet.
.MONDAY NIGHT...Northeast winds 15 to 20 knots becoming northwest
5 to 15 knots. Showers likely in the evening. Waves 1 to 3 feet
subsiding to 1 foot or less.
.TUESDAY...Northwest winds 5 to 10 knots becoming west. Waves
2 feet or less.
.TUESDAY NIGHT...West winds 5 to 15 knots becoming northwest.
Waves 1 to 2 feet.
.WEDNESDAY...West winds 5 to 15 knots becoming south less than
10 knots. Waves 1 foot or less.
.THURSDAY...South winds 10 knots or less. A chance of showers
during the day, then showers likely with a chance of
thunderstorms Thursday night. Waves 1 foot or less.
.FRIDAY...Southwest winds 5 to 15 knots becoming west. A chance
of showers during the day. Waves 2 feet or less.

Winds and waves higher in and near thunderstorms.

$$

LOZ061-220300-
MAFOR 2121/
ONTARIO WEST 1/2 12600 11500 11400 11300 11206 12216. Waves 2
feet or less.

ONTARIO EAST 1/2 11610 12500 11400 11300 11310 11316 11216. Waves
2 feet or less.

$$