FZUS61 KBUF 100211
GLFLO

Open Lake Forecast for Lake Ontario
National Weather Service Buffalo NY
1011 PM EDT Thu Apr 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 29.5 inch low will move east of James Bay tonight and
across northern Quebec, with a trailing cold front crossing the lake
tonight through tomorrow. A 30.5 inch high is then forecast to build
into the central Great Lakes region Saturday, then drift east to New
England by Sunday. A cold front from a 29.4 inch low near James Bay
will cross the Lake Monday, and then stall south of the Lake before
slowly lifting northward later Tuesday as a warm front.

LOZ062-100900-
Lake Ontario open waters from the Niagara River to Hamlin Beach-
1011 PM EDT Thu Apr 9 2026

.OVERNIGHT...West winds 5 to 15 knots becoming north. A
chance of rain showers late. Waves 1 to 3 feet.
.FRIDAY...Northeast winds 5 to 10 knots becoming northwest. A
chance of rain showers early, then rain showers from late morning
on. Waves around 1 foot.
.FRIDAY NIGHT...Northwest winds 5 to 15 knots. A chance of rain
showers in the evening. Waves 1 to 2 feet.
.SATURDAY...Northwest winds 5 to 10 knots becoming southwest.
Waves 2 feet or less.
.SATURDAY NIGHT...Southwest winds 10 knots or less becoming
southeast. Waves 1 foot or less.
.SUNDAY...Southeast winds 5 to 10 knots becoming southwest and
increasing to 15 to 25 knots. A chance of rain showers. Waves
1 foot or less building to 4 to 7 feet. Waves occasionally around
9 feet.
.MONDAY...Southwest winds to 30 knots diminishing to 15 to
20 knots. A chance of showers. Waves 5 to 8 feet subsiding to
3 to 5 feet. Waves occasionally around 10 feet.
.TUESDAY...Southwest winds 15 to 20 knots. A chance of showers
during the day, then showers likely Tuesday night. Waves 2 to
4 feet.

$$

LOZ063>065-100900-
Lake Ontario open waters from Hamlin Beach to the Saint Lawrence
River-
1011 PM EDT Thu Apr 9 2026

.OVERNIGHT...South winds 15 to 20 knots becoming west and
diminishing to 5 to 10 knots. Waves 2 to 4 feet subsiding to 1 to
3 feet.
.FRIDAY...North winds 5 to 10 knots becoming northwest. Rain
showers likely early, then a chance of rain showers late in the
morning. Rain showers in the afternoon. Waves 1 to 2 feet.
.FRIDAY NIGHT...Northwest winds 5 to 15 knots. A chance of rain
showers. Waves 1 to 3 feet.
.SATURDAY...Northwest winds 10 to 15 knots becoming west. Waves
1 to 3 feet.
.SATURDAY NIGHT...West winds 10 knots or less becoming southeast.
Waves 2 feet or less.
.SUNDAY...Southeast winds 5 to 15 knots becoming south and
increasing to 30 knots. A chance of rain showers. Waves 2 feet or
less building to 5 to 8 feet. Waves occasionally around 10 feet.
.MONDAY...Southwest winds 15 to 25 knots. Showers likely. Waves
5 to 8 feet subsiding to 3 to 5 feet. Waves occasionally around
10 feet.
.TUESDAY...Southwest winds 10 to 15 knots increasing to 15 to
20 knots. A chance of showers during the day, then showers likely
Tuesday night. Waves 2 to 4 feet subsiding to 1 to 3 feet.

$$

LOZ061-100900-
MAFOR 1003/
ONTARIO WEST 1/2 11710 11800 12100 11106 11806 12700. Waves 1 to
3 feet.

ONTARIO EAST 1/2 11520 11610 13800 11806 12700. Waves 2 to 4 feet
subsiding to 1 to 3 feet overnight. Waves 2 feet or less Friday
and Friday evening.

$$