What is the current water temperature in San Jose?

Q: What is the current water temperature in San Jose?

As of now, in San Jose, the water temperature is 11.09°F. Swimming in water of this temperature is considered as extremely cold, and there's a substantial risk of hypothermia if exposed for more than a brief duration.

United States > San Jose

Water temperature in San Jose

Detailed information about the current water temperature in San Jose. The trend over the last two weeks, daily averages, and precise forecast of the water temperature changes. Gain a deeper understanding of seasonal dynamics with monthly statistical analyses covering recent years.

52.0

°F

December 14, 14:20

Trend:

decreasing

Yesterday:

52.2°F

Tomorrow:

51.9°F

Sunrise:

07:14

Sunset:

16:51

Day Length:

9 h. 37 min.

San Jose in December

Minimum:

52.4°F

Average:

53.2°F

Maximum:

55.5°F

Sea water temperature in San Jose today

As of now, in San Jose, the water temperature is 52.0°F. Swimming in water of this temperature is considered as extremely cold, and there's a substantial risk of hypothermia if exposed for more than a brief duration. Today's reading is 2.7°F lower than the average recorded on this particular day in recent years. The sea temperature remains approximately unchanged from yesterday. According to the forecast, we expect the temperature to stay about the same.

Recent sea temperature and forecast

Today's water temperature is considerably lower than the average registered over the last two weeks, indicating a slight cooling trend. It is also close to the historical minimum temperature for this date. The maximum temperature recorded for this date was 56.7°F on 2015, while the historical minimum was 53.1°F on 2022.

latest data

last year

The water temperature over the last two weeks displayed soome variability. While the two week average stayed close to the historical average, there were some days when the temperature was close to the histoorical minimum and others when it was close to the historical maximum. The forecast for the upcoming week shows a gradual cooling trend. The average temperature is expected to be 51.4°F, the minimum temperature may reach 51.0°F, and the maximum might stay at 51.9°F.

Daily water temperature in San Jose

Date	Current Year actual* / forecast**	last year	10 years average
Nov 30	57.1°F	54.6°F	56.3°F
Dec 1	56.8°F	54.5°F	56.3°F
Dec 2	56.7°F	54.5°F	56.2°F
Dec 3	56.5°F	54.8°F	56.0°F
Dec 4	56.4°F	53.8°F	55.7°F
Dec 5	56.1°F	54.1°F	55.7°F
Dec 6	55.9°F	54.2°F	55.5°F
Dec 7	55.2°F	54.4°F	55.3°F
Dec 8	55.2°F	53.4°F	55.1°F
Dec 9	54.3°F	53.5°F	54.7°F
Dec 10	54.3°F	54.1°F	54.8°F
Dec 11	54.4°F	54.0°F	54.9°F
Dec 12	53.6°F	54.1°F	54.8°F
Dec 13	52.2°F	54.1°F	54.6°F
Dec 14	52.0°F	54.1°F	54.7°F
Dec 15	51.9°F	54.1°F	54.6°F
Dec 16	51.8°F	53.9°F	54.5°F
Dec 17	51.6°F	53.5°F	54.3°F
Dec 18	51.4°F	53.4°F	54.1°F
Dec 19	51.3°F	53.6°F	54.0°F
Dec 20	51.1°F	53.0°F	53.8°F
Dec 21	51.0°F	53.2°F	53.7°F

* actual - actual temperature values

** forecast - projected values for the next week

Real-time coastal temperatures could deviate by several degrees from the provided readings. These deviations often become evident following intense rainfall or strong winds.

Our forecasting methodology leverages a mathematical model, that uses current water and weather conditions, historical records, wind intensity and direction.

Sea water temperature in San Jose by month

In an average year, San Jose offers no days when the water temperature is warm enough to swim comfortably.

The warmest water in San Jose was recorded on October 7, 2024, reaching a 73.9°F. While the coldest temperature occurred on January 23, 2025, dipping to 50.5°F. The average readings by season are 53.8°F in Winter, 57.9°F in Spring, 64.1°F in Summer, and 62.2°F in Autumn.

Popular neighboring cities and resorts

City	Water temperature*	Distance**
Redwood City	52.9°F	21mi
Oakland	52.8°F	38mi
San Francisco	53.6°F	42mi
Monterey	58.5°F	51mi

* current water temperature in this city

** straight line distance from San Jose