San Jose Sea Temperature

Looking to find out what the sea water temperature in San Jose is for today and the next few days? Below are data and charts that will give you information about sea temperatures in San Jose and nearby locations.

Water temperature in San Jose right now

Below is the current sea temperature for San Jose, Northern Mariana Islands on 21st March 2025.

27.8° C

(82.05° F)

  • yesterday: 27.79° C (82.03° F)
  • a week ago: 28.12° C (82.62° F)

This water temperature is comparable to that of a swimming pool, but it might be higher than most open water swimmers prefer for serious swimming. Make sure to drink plenty of water before and after swimming and don't wear a wetsuit to avoid overheating.

The average sea temperature for San Jose on March 21st over the last 10 years is 27.73° C (81.91° F), with a low temperature of 27.25° C (81.05° F) and a high of 28.39° C (83.1° F).

Analysis and forecast for San Jose water temperatures

The water temperature in San Jose today is higher than the average temperature of 27.73° C (81.91° F) and the temperature on this day last year, 21st March 2024, was 27.78° C (82° F).

The chart and table below shows the change in water temperature in San Jose over the last 30 days:

Date Temperature (Celsius) Temperature (Fahrenheit)
March 21 27.8° C 82.05° F
March 20 27.79° C 82.03° F
March 19 28.19° C 82.74° F
March 18 28.07° C 82.53° F
March 17 28.09° C 82.56° F
March 16 28.13° C 82.63° F
March 15 28.13° C 82.63° F
March 14 28.12° C 82.62° F
March 13 28.24° C 82.83° F
March 12 28.28° C 82.9° F
March 11 28.33° C 82.99° F
March 10 28.32° C 82.98° F
March 9 28.17° C 82.71° F
March 8 28.09° C 82.56° F
March 7 27.96° C 82.33° F
March 6 27.82° C 82.08° F
March 5 27.92° C 82.26° F
March 4 27.88° C 82.18° F
March 3 27.8° C 82.04° F
March 2 27.75° C 81.95° F
March 1 27.83° C 82.09° F
February 28 27.91° C 82.24° F
February 27 27.98° C 82.36° F
February 26 28.06° C 82.51° F
February 25 27.99° C 82.38° F
February 24 28.01° C 82.42° F
February 23 28.02° C 82.44° F
February 22 28.01° C 82.42° F
February 21 28.09° C 82.56° F
February 20 28.2° C 82.76° F
February 19 28.23° C 82.81° F

The actual nearshore temperatures may vary by several degrees and this can also be heavily affected by weather. Strong winds can cause cold, deep waters to replace the surface waters that had been warmed by the sun, and heavy rain can also reduce the temperature of the sea surface temperature as well.

Water temperature in San Jose by month

The chart below shows the monthly average water temperature in San Jose.

For more detailed information on how the sea temperature in San Jose changes for each month of the year, choose from the months below.

January February March April May June July August September October November December

San Jose map and nearby water temperatures

Locations near San Jose

Tinian

Northern Mariana Islands, Australia and Oceania

2.40 miles away

Susupe

Northern Mariana Islands, Australia and Oceania

13.67 miles away

Saipan

Northern Mariana Islands, Australia and Oceania

16.44 miles away

The highest temperature in Northern Mariana Islands today is 27.64° C (81.76° F) in Rota. The lowest is in Maug Islands, where the temperature of the water is 25.85° C (78.54° F).

Why measure sea surface temperatures (SST) in San Jose?

The ocean covers about 71% of the Earth's surface, and scientists record the sea surface temperature (SST) of locations such as San Jose because they want to understand and learn how the ocean communicates with the atomosphere of Earth.

SST is one measure that provides information on the global climate, and it can be used to predict the weather in San Jose as well as atmospheric model simulations and to study marine ecosystems in the area.

Data source and citation

Raw data for the calculations made to find the sea surface temperature in San Jose comes from the National Oceanic and Atmospheric Administration (NOAA) and their 1/4° daily Optimum Interpolation Sea Surface Temperature.

The water temperature data is constructed by combining observations from different platforms (satellites, ships, buoys, and Argo floats) on a regular global grid. A spatially complete sea surface temperature map is then built by interpolating to fill in gaps in the data.

If you'd like to use any of the information above in the format it is presented, please use the citation tool below.

  • "San Jose Sea Temperature". SeaTemperatures.net. Accessed on March 21, 2025. http://seatemperatures.net/australia-and-oceania/northern-mariana-islands/san-jose/.

  • "San Jose Sea Temperature". SeaTemperatures.net, http://seatemperatures.net/australia-and-oceania/northern-mariana-islands/san-jose/. Accessed 21 March, 2025

  • San Jose Sea Temperature. SeaTemperatures.net. Retrieved from http://seatemperatures.net/australia-and-oceania/northern-mariana-islands/san-jose/.