World sea water temperatures

Onslow Beach water temp

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This data the coastal Onslow 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 Onslow Beach

Water temperature in Onslow Beach today is 79°F. Based on our historical data over a period of ten years, the warmest water in this day in the Atlantic Ocean near Onslow Beach was recorded in 2020 and was 84.2°F, and the coldest was recorded in 2021 at 78.8°F. Sea water temperature in Onslow Beach is expected to rise to 80.4°F in the next 10 days. September average water temperature in Onslow Beach is 80.1°F, the minimum temperature is 75.2°F, and the maximum is 84.2°F.

The swimming season in Onslow Beach lasts from May to November. During those months, Onslow Beach water temperature does not drop below 68°F and therefore suitable for comfortable swimming. The average water temperature in Onslow Beach in winter reaches 57.7°F, in spring 63.9°F, in summer the average temperature rises to 80.4°F, and in autumn it is 73.4°F.

Onslow Beach water temperature now


September 5, 2025
today temp
79°F
September 4, 2025
yesterday temp
78.8°F


The ocean salinity in Onslow Beach is 34.35‰, and the average salinity of the World Ocean is 35‰.

Surf Forecast in Onslow 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 Onslow 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 Onslow 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)

0-3 h3-6 h6-9 h9-12 h
1' 10"1' 9"1' 8"1' 7"
0.56 m0.53 m0.5 m0.47 m
12-15 h15-18 h18-21 h21-24 h
1' 5"1' 5"1' 5"1' 5"
0.44 m0.43 m0.43 m0.44 m

Surf report in Onslow Beach

Onslow Beach wave height and direction

Onslow Beach weather forecast

Onslow Beach wind speed and direction

Current temperature and weather

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

0-3 h3-6 h6-9 h9-12 h
76.8°F75.6°F74.7°F78.8°F
12-15 h15-18 h18-21 h21-24 h
88.5°F87.4°F81.5°F79.9°F

You may also be interested in other sections of our site for Onslow Beach: Sunrise and Sunset, Tides

Onslow Beach water temperature by month

These figures shows the average, minimum and maximum monthly sea temperature in Onslow 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 Onslow 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

MonthAvrMinMax
January57.2°F45.3°F69.1°Fcold
Ocean water temperature in Onslow Beach in January
February55.2°F47.7°F65.3°Fcold
Ocean water temperature in Onslow Beach in February
March57.9°F49.1°F67.1°Fcold
Ocean water temperature in Onslow Beach in March
April63°F54°F72.5°Fcold
Ocean water temperature in Onslow Beach in April
May70.7°F63°F78.4°Fwarm
Ocean water temperature in Onslow Beach in May
June77.9°F70°F82.8°Fhot
Ocean water temperature in Onslow Beach in June
July81.3°F76.6°F86°Fhot
Ocean water temperature in Onslow Beach in July
August81.9°F77.4°F84.7°Fhot
Ocean water temperature in Onslow Beach in August
September80.1°F75.2°F84.2°Fhot
Ocean water temperature in Onslow Beach in September
October74.1°F65.3°F81.7°Fwarm
Ocean water temperature in Onslow Beach in October
November66.2°F57.4°F73°Fcold
Ocean water temperature in Onslow Beach in November
December60.6°F52.3°F68.7°Fcold
Ocean water temperature in Onslow Beach in December

Chart monthly average water temperature in Onslow Beach

Water temperature in Onslow Beach

Where is the warmest sea water in the world?

If you want to plan a vacation on the beach and enjoy the warm sea, choose the day of the year, region and the minimum comfortable sea/ocean temperature that interests you. As a result, you will get a list of countries and cities in which the average sea temperature or maximum temperature on this day over the past 10 years exceeds your chosen value

Region
Date (day and month)
Water temperature: min 60°F
 Average temperature  Maximum temperature

Nearby beaches and cities

The nearest beaches and cities from Onslow 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

WaterWeatherWave
Jacksonville77.9°F89.6°F1' 4"
North Topsail Beach78.6°F84.2°F1' 6"
Hammocks Beach78.8°F82.4°F1' 6"
Ocean City Beach79°F87.8°F1' 6"
Swansboro77°F80.6°F1' 1"
Cape Carteret77.5°F80.6°F1' 1"
Cedar Point77.5°F80.6°F1' 1"
Surf City78.8°F82.4°F1' 7"
Broad Creek77.5°F80.6°F1' 3"
Emerald Isle77.5°F80.6°F1' 3"

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[1] - The "Blue Flag" is awarded to beaches which fulfill a number of criteria, including: the quality of the bathing water, which must be in accordance with the relevant European Union Directive environmental education and information and beach area management and safety.

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Our report for Onslow 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.

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