Marine Forecasts

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

• Tonight
  Northwest winds 5 to 10 knots becoming light and variable. Partly cloudy. Waves 1 foot or less.
• Friday
  Light and variable winds becoming southwest 5 to 10 knots. Sunny. Waves 1 foot or less.
• Friday Night
  Southwest winds 10 knots or less becoming south. Mostly cloudy. Waves 1 foot or less.
• Saturday
  South winds 10 knots or less. Showers likely with a chance of thunderstorms saturday night. Waves 1 foot or less.
• Sunday
  South winds 10 knots or less becoming north. Showers likely with a chance of thunderstorms. Waves 1 foot or less.
• Monday
  North winds 10 knots or less becoming west. Mainly clear. Waves 1 foot or less.

Open Lake Forecast for Lake Ontario
National Weather Service Buffalo NY
1003 AM EDT Thu Jul 30 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 weak trough averaging 29.6 inches exits eastward while a ridge 
averaging 30.0 inches builds from the western Great Lakes through 
tonight. The ridge exits slowly eastward Friday through Saturday 
before a cold front sweeps eastward across Lake Ontario on Sunday. 
In the wake of the front, a 30.0 inch high builds over the western 
Great Lakes builds southeast across the lower Great Lakes region 
for Monday and Tuesday.

LOZ062-302100-
Lake Ontario open waters from the Niagara River to Hamlin Beach-
1003 AM EDT Thu Jul 30 2026

.THIS AFTERNOON...Northwest winds 5 to 10 knots becoming west.
Waves 2 feet or less. 
.TONIGHT...West winds 10 knots or less becoming northwest. Waves
1 foot or less. 
.FRIDAY...West winds less than 10 knots. Waves 1 foot or less. 
.FRIDAY NIGHT...Southwest winds 10 knots or less. Waves 1 foot or
less. 
.SATURDAY...Northeast winds less than 10 knots. A chance of
showers during the day, then showers likely Saturday night. Waves
1 foot or less. 
.SUNDAY...North winds 10 knots or less. Showers likely during the
day. Waves 1 foot or less. 
.MONDAY...North winds 10 knots or less becoming west. Waves
1 foot or less. 

$$

LOZ063>065-302100-
Lake Ontario open waters from Hamlin Beach to the Saint Lawrence
River-
1003 AM EDT Thu Jul 30 2026

.THIS AFTERNOON...North winds 5 to 10 knots becoming west. Waves
1 to 3 feet. 
.TONIGHT...West winds 10 knots or less becoming northwest. Waves
1 foot or less. 
.FRIDAY...Northwest winds 10 knots or less becoming west. Waves
1 foot or less. 
.FRIDAY NIGHT...Southwest winds 10 knots or less becoming south.
Waves 1 foot or less. 
.SATURDAY...South winds 10 knots or less. A chance of showers
during the day, then showers likely with a chance of
thunderstorms Saturday night. Waves 1 foot or less. 
.SUNDAY...Southwest winds 10 knots or less becoming north.
Showers likely with a chance of thunderstorms during the day,
then a chance of showers Sunday night. Waves 1 foot or less. 
.MONDAY...North winds 10 knots or less becoming west. Waves
1 foot or less. 

Winds and waves higher in and near thunderstorms.

$$

LOZ061-302100-
MAFOR 3015/
ONTARIO WEST 1/2 11700 13600 12700 12600. Waves 2 feet or less. 

ONTARIO EAST 1/2 11800 11700 12600 13700 11600. Waves 1 to 3 feet
this afternoon. Waves 1 foot or less tonight and Friday morning. 

$$