Marine Forecasts

• Niagara River to Hamlin Beach
• Hamlin Beach to Sodus Bay
• Sodus Bay to Mexico Bay
• Mexico Bay to St. Lawrence River

• Today
  Northeast winds 10 to 15 knots becoming north. Mostly sunny. Waves 1 to 3 feet.
• Tonight
  North winds 5 to 10 knots becoming light and variable. Mainly clear. Waves 2 feet or less.
• Monday
  West winds 10 knots or less. Mostly sunny. Waves 1 foot or less.
• Monday Night
  West winds 10 knots or less becoming southwest. Partly cloudy. Waves 1 foot or less.
• Tuesday
  West winds 10 knots or less becoming south. Mostly cloudy. Waves 1 foot or less.
• Wednesday
  South winds 10 to 15 knots becoming west 15 to 20 knots. Showers likely with a chance of thunderstorms. Waves 1 foot or less building to 4 to 7 feet. Waves occasionally around 9 feet.
• Thursday
  West winds 15 to 25 knots becoming northwest. Partly to mostly cloudy. Waves 5 to 8 feet subsiding to 3 to 5 feet. Waves occasionally around 10 feet.

Open Lake Forecast for Lake Ontario
National Weather Service Buffalo NY
402 AM EDT Sun Sep 6 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 large high pressure ridge averaging 30.2 inches will gradually 
build from the upper Great Lakes southeast across the Lower Lakes 
through Tuesday. The ridge will shift southeast on Wednesday, 
allowing a warm front to sweep northeastward across the Lake, 
followed by a cold front crossing the Lake later Wednesday night 
into Thursday.

LOZ062-061500-
Lake Ontario open waters from the Niagara River to Hamlin Beach-
402 AM EDT Sun Sep 6 2026

.TODAY...Northeast winds 5 to 15 knots becoming east. Waves 1 to
3 feet. 
.TONIGHT...East winds less than 10 knots. Waves 1 foot or less. 
.MONDAY...Northwest winds less than 10 knots becoming west. Waves
1 foot or less. 
.MONDAY NIGHT...Southwest winds less than 10 knots becoming west.
Waves 1 foot or less. 
.TUESDAY...Southwest winds 10 knots or less becoming south. Waves
1 foot or less. 
.WEDNESDAY...Southwest winds 15 to 25 knots becoming west 15 to
20 knots. Showers likely with a chance of thunderstorms. Waves
2 to 4 feet building to 5 to 8 feet. Waves occasionally around
10 feet. 
.THURSDAY...West winds 15 to 20 knots becoming northwest 10 to
15 knots. Waves 3 to 6 feet subsiding to 2 to 4 feet. 

Winds and waves higher in and near thunderstorms.

$$

LOZ063>065-061500-
Lake Ontario open waters from Hamlin Beach to the Saint Lawrence
River-
402 AM EDT Sun Sep 6 2026

.TODAY...Northeast winds 10 to 15 knots. Waves 1 to 3 feet
building to 2 to 4 feet, then subsiding to 1 to 3 feet. 
.TONIGHT...North winds 10 knots or less. Waves 2 feet or less. 
.MONDAY...Northwest winds 10 knots or less becoming west. Waves
1 foot or less. 
.MONDAY NIGHT...West winds 5 to 10 knots. Waves 1 foot or less. 
.TUESDAY...West winds 10 knots or less becoming south 10 to
15 knots. Waves 2 feet or less. 
.WEDNESDAY...South winds 15 to 25 knots becoming west. Showers
with a chance of thunderstorms. Waves 2 to 4 feet building to
4 to 7 feet. Waves occasionally around 9 feet. 
.THURSDAY...West winds 15 to 25 knots becoming northwest. Waves
5 to 8 feet subsiding to 3 to 5 feet. Waves occasionally around
10 feet. 

Winds and waves higher in and near thunderstorms.

$$

LOZ061-061500-
MAFOR 0609/
ONTARIO WEST 1/2 12110 11100 12200 11700 12800. Waves 1 to 3 feet
today. Waves 1 foot or less tonight. 

ONTARIO EAST 1/2 14110 11100 13800. Waves 1 to 3 feet building to
2 to 4 feet, then subsiding to 1 to 3 feet today. Waves 2 feet or
less tonight. 

$$