Portsmouth (NC) water temp

This data the coastal Portsmouth 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 Portsmouth

Water temperature in Portsmouth today is 77.4°F. Based on our historical data over a period of ten years, the warmest water in this day in the Atlantic Ocean near Portsmouth was recorded in 2018 and was 84.2°F, and the coldest was recorded in 2024 at 79°F. Sea water temperature in Portsmouth is expected to rise to 79.9°F in the next 10 days. September average water temperature in Portsmouth is 79.5°F, the minimum temperature is 73.8°F, and the maximum is 84.7°F.

The swimming season in Portsmouth lasts from May to December. During those months, Portsmouth water temperature does not drop below 68°F and therefore suitable for comfortable swimming. The average water temperature in Portsmouth in winter reaches 63.7°F, in spring 66.4°F, in summer the average temperature rises to 80.2°F, and in autumn it is 74.5°F.

Portsmouth water temperature now

The ocean salinity in Portsmouth is 35.35‰, and the average salinity of the World Ocean is 35‰.

Surf Forecast in Portsmouth 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 Portsmouth. 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 Portsmouth. 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 Portsmouth

Portsmouth weather forecast

Current temperature and weather

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

0-3 h	3-6 h	6-9 h	9-12 h
77.2°F	77.4°F	77.2°F	78.6°F

12-15 h	15-18 h	18-21 h	21-24 h
80.2°F	81°F	79.5°F	78.3°F

Portsmouth water temperature by month

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

The nearest beaches and cities from Portsmouth 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
Davis	77.5°F	82.4°F		1' 7"
Buxton	76.6°F	77°F		1' 10"
Engelhard	75.7°F	84.2°F		0' 11"
Cape Hatteras	76.5°F	77°F		2' 4"
Oriental	77.2°F	87.8°F		0' 4"
Outer Banks	76.6°F	77°F		2' 2"
Harkers Island	77.2°F	82.4°F		1' 4"
Cape Lookout	77.5°F	82.4°F		1' 10"
Beaufort	77.5°F	82.4°F		1' 3"
Minnesott Beach	76.1°F	89.6°F		0' 11"

If you have interesting photos of this place, you can upload them here. Photos will be available to all users after verification by the moderator.

Portsmouth Island

Get widget or API for your website

Our report for Portsmouth 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.