Castro Valley Sea Temperature in September

Looking to find out what the average sea water temperature in Castro Valley is for September? Find out what the lowest, highest, and average water temperatures are for Castro Valley over the past 10 years.

Average water temperature in Castro Valley for September

The average, high, and low temperatures below should help you if you can swim in the water in Castro Valley in September.

15.55° C

(59.99° F)

  • highest: 18.1° C (64.58° F)
  • lowest: 13.16° C (55.69° F)

At this temperature, water will feel cold compared to a swimming pool, but with a bit of experience and practice most people will find the water relatively comfortable to swim in.

Water temperature range by day in September in Castro Valley

The chart below shows the range of low and high temperatures by day for the month of September in Castro Valley.

Water temperatures for September in Castro Valley in recent years

Day 2024 2023 2022 2021
1 0° C 15.43° C 14.96° C 16.57° C
2 0° C 15.72° C 14.57° C 16.99° C
3 0° C 15.68° C 14.17° C 17.21° C
4 0° C 15.66° C 14.11° C 17.15° C
5 0° C 15.31° C 14.41° C 16.98° C
6 0° C 15.36° C 14.64° C 16.89° C
7 0° C 15.71° C 15.43° C 16.71° C
8 0° C 15.62° C 15.51° C 16.59° C
9 0° C 15.97° C 15.41° C 16.63° C
10 0° C 15.39° C 15.16° C 16.85° C
11 0° C 15.39° C 15.55° C 16.91° C
12 0° C 15.18° C 15.41° C 16.75° C
13 0° C 15.07° C 15.08° C 16.3° C
14 0° C 15.61° C 15.04° C 16.34° C
15 0° C 16.64° C 15.16° C 16.48° C
16 0° C 16.59° C 15.18° C 16.44° C
17 0° C 16.33° C 14.97° C 16.25° C
18 0° C 16.39° C 14.83° C 15.97° C
19 0° C 16.3° C 14.98° C 15.96° C
20 0° C 16.17° C 15.46° C 15.94° C
21 0° C 16.02° C 15.84° C 16.02° C
22 0° C 16° C 15.9° C 16.13° C
23 0° C 16.11° C 15.93° C 16.24° C
24 0° C 16.24° C 16° C 16.25° C
25 0° C 16.31° C 16.38° C 16.22° C
26 0° C 16.46° C 16.6° C 15.99° C
27 0° C 16.5° C 16.23° C 15.79° C
28 0° C 16.34° C 15.78° C 15.5° C
29 0° C 15.99° C 15.62° C 15.29° C
30 0° C 15.65° C 15.55° C 15.19° C

Water temperature in September for locations near Castro Valley

Fremont

United States, North America

11.18 miles away

Alameda

United States, North America

12.79 miles away

San Francisco Bay

United States, North America

12.96 miles away

Oakland

United States, North America

13.14 miles away

Berkeley

United States, North America

16.32 miles away

Aquatic Park

United States, North America

16.65 miles away

Data source and citation

Raw data for the calculations made to find the sea surface temperature in Castro Valley 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.

  • "Castro Valley Sea Temperature in September". SeaTemperatures.net. Accessed on May 2, 2024. http://seatemperatures.net/north-america/united-states/castro-valley-september-temperature/.

  • "Castro Valley Sea Temperature in September". SeaTemperatures.net, http://seatemperatures.net/north-america/united-states/castro-valley-september-temperature/. Accessed 2 May, 2024

  • Castro Valley Sea Temperature in September. SeaTemperatures.net. Retrieved from http://seatemperatures.net/north-america/united-states/castro-valley-september-temperature/.