World sea water temperatures

Foster City water temp

Home > United States > California > Foster City

This data the coastal Foster City 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 Foster City

Water temperature in Foster City today is 71.4°F. Based on our historical data over a period of ten years, the warmest water in this day in Foster City was recorded in 2022 and was 72.7°F, and the coldest was recorded in 2012 at 56.7°F. Sea water temperature in Foster City is expected to drop to 62.2°F in the next 10 days. September average water temperature in Foster City is 62.2°F, the minimum temperature is 55.6°F, and the maximum is 75°F.

The swimming season in Foster City lasts from June to September. During those months, Foster City water temperature does not drop below 68°F and therefore suitable for comfortable swimming. The average water temperature in Foster City in winter reaches 53.4°F, in spring 56.5°F, in summer the average temperature rises to 61.3°F, and in autumn it is 60.3°F.

Foster City water temperature now


September 5, 2025
today temp
71.4°F
September 4, 2025
yesterday temp
71.2°F


The ocean salinity in Foster City is 11.23‰, and the average salinity of the World Ocean is 35‰.

Surf Forecast in Foster City 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 Foster City. 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 Foster City. 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' 3"1' 1"1' 1"1' 1"
0.38 m0.34 m0.33 m0.33 m
12-15 h15-18 h18-21 h21-24 h
1' 0"1' 1"1' 2"1' 4"
0.31 m0.34 m0.36 m0.4 m

Surf report in Foster City

Foster City wave height and direction

Foster City weather forecast

Foster City wind speed and direction

Current temperature and weather

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

0-3 h3-6 h6-9 h9-12 h
62.4°F61.5°F61.2°F61.7°F
12-15 h15-18 h18-21 h21-24 h
63.9°F65.1°F63°F60.6°F

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

Foster City water temperature by month

These figures shows the average, minimum and maximum monthly sea temperature in Foster City. 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 Foster City 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
January52.5°F50.4°F55.8°Fcold
Ocean water temperature in Foster City in January
February53.4°F50.4°F59.4°Fcold
Ocean water temperature in Foster City in February
March55.2°F49.3°F60.4°Fcold
Ocean water temperature in Foster City in March
April56.5°F50.7°F65.5°Fcold
Ocean water temperature in Foster City in April
May57.6°F50°F69.3°Fcold
Ocean water temperature in Foster City in May
June59.9°F51.8°F72.7°Fcold
Ocean water temperature in Foster City in June
July61.9°F52.9°F74.5°Fcold
Ocean water temperature in Foster City in July
August62.2°F54.3°F75.4°Fcold
Ocean water temperature in Foster City in August
September62.2°F55.6°F75°Fcold
Ocean water temperature in Foster City in September
October60.6°F54.1°F72.1°Fcold
Ocean water temperature in Foster City in October
November57.7°F52.7°F64.6°Fcold
Ocean water temperature in Foster City in November
December54.1°F50.9°F59.4°Fcold
Ocean water temperature in Foster City in December

Chart monthly average water temperature in Foster City

Water temperature in Foster City

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

Best places and resort to visit in California

The most popular beaches and cities in California with sea temperature today, weather, air temperature and sea state (wave height)

WaterWeatherWave
San Diego70.2°F73.4°F4' 0"
Santa Monica72°F77°F2' 8"
La Jolla Cove73.2°F77°F3' 6"
Lake Tahoe66.7°F75.2°F0' 2"
Los Angeles66.6°F66.2°F4' 3"
Millbrae70.2°F64.4°F1' 9"
Mountain View72°F68°F1' 2"
Palo Alto72°F68°F1' 2"
San Leandro71.2°F71.6°F1' 2"
Oakland70.9°F66.2°F1' 2"

California photo gallery

  • California
  • California
  • California
  • California

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.

Vote for California best beach

Current rating: (0 votes cast)

If you know this place (Foster City) and want to leave your comment or rate it, then fill out the following form.

Your rating for this place:

Does this place have a "Blue Flag" award [1], are there rip currents and what type of beach is it, sand or pebble:

Is the beach a dog-friendly place, child friendly or a nudist beach?


Your comments for this place (water quality, crowds, facilities, activities, lifeguards, service etc.):



[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.

Get widget or API for your website

Our report for Foster City 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.

Contact us: admin@seatemperature.info
privacy policy