Union Beach water temp

This data the coastal Union Beach ocean water temperature today, tomorrow and the upcoming days. Besides, you can also get information about the weather and surf forecast, as well as the data on sunrise / sunset and moonrise / moonset at a given point on any given day.

Current ocean temperature in Union Beach

Water temperature in Union Beach today is 72.3°F. Based on our historical data over a period of ten years, the warmest water in this day in the Atlantic Ocean near Union Beach was recorded in 2018 and was 78.3°F, and the coldest was recorded in 2017 at 70.2°F. Sea water temperature in Union Beach is expected to drop to 72°F in the next 10 days. September average water temperature in Union Beach is 71.2°F, the minimum temperature is 64.8°F, and the maximum is 78.3°F.

The swimming season in Union Beach lasts from June to September. During those months, Union Beach water temperature does not drop below 68°F and therefore suitable for comfortable swimming. The average water temperature in Union Beach in winter reaches 42.3°F, in spring 48.9°F, in summer the average temperature rises to 72.3°F, and in autumn it is 62.8°F.

Union Beach water temperature now

The ocean salinity in Union Beach is 27.35‰, and the average salinity of the World Ocean is 35‰.

Surf Forecast in Union Beach for today

Another important indicators for a comfortable holiday on the beach are the presence and height of the waves, as well as the speed and direction of the wind. Please find below data on the swell size for Union Beach. We calculate the swell size based on the mean wave height (trough to crest) of each third highest wave. For more information on surf forecasts for the next ten days, please visit sea state forecast Union Beach. Data in table shown for September 5, 2025, time in GMT 0 format (you can change the time zone on the sea state forecast page)

Surf report in Union Beach

Union Beach weather forecast

Current temperature and weather

Data in a table show Union Beach temperature today (September 5, 2025). For more information and forecast for a few days, go to the weather forecast Union Beach.

0-3 h	3-6 h	6-9 h	9-12 h
69.1°F	68.5°F	67.6°F	71.2°F

12-15 h	15-18 h	18-21 h	21-24 h
82.8°F	89.2°F	85.6°F	79.3°F

Union Beach water temperature by month

These figures shows the average, minimum and maximum monthly sea temperature in Union Beach. In addition to the table values, the graph below displays of changes average surface temperature during the year. Values are calculated based on the data over the past 10 years. Using them, you can check the water temperature in Union Beach on any day of this period that interests you. Click on the month link and you will see a table for each day, or alternatively you can view the temperature curve of the month and select 2 different years you want to compare, either in a table or as a curve

Chart monthly average water temperature in Union Beach

The nearest beaches and cities from Union Beach with the water temperature today, as well as the air temperature and the state of the weather during the day and the average wave height for today

	Water	Weather		Wave
Raritan Bay	72.3°F	89.6°F		1' 6"
Laurence Harbor	72.3°F	89.6°F		1' 6"
Tottenville	72.3°F	89.6°F		1' 6"
South Amboy	72.3°F	89.6°F		1' 6"
Great Kills	72°F	89.6°F		1' 3"
Woodbridge	72.3°F	84.2°F		1' 6"
Cedar Grove Beach	71.6°F	89.6°F		1' 3"
Fair Haven	71.6°F	84.2°F		1' 6"
Port Monmouth	71.6°F	84.2°F		1' 6"
Belford	71.6°F	84.2°F		1' 6"

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Our report for Union Beach is compiled using satellite data together with in-situ observations to get the most reliable daily data of sea surface temperatures, surf forecasts, current temperatures and weather forecasts.