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San Jose

San Jose Current Water Temperature and Forecast

On this page, you will find comprehensive information about the water temperature in San Jose, including current readings, historical data and trends, monthly averages, as well as weather forecasts and upcoming temperature predictions. We find every spot where you can swim and tell you what the water temperature is there today and throughout the year.

Current Water Temperature in San Jose

21.1°C

TODAY

21.1°C

YESTERDAY

21.3°C

A WEEK AGO

As of today, the minimum water temperature in San Jose ranges from 68°F (20°C) to 74°F (23°C). The water is warm and pleasant for swimming, and in this range, one can stay in the water for extended periods without the risk of hypothermia. This is the ideal temperature for relaxation, swimming, and water sports. Families with children, as well as outdoor enthusiasts, will enjoy swimming and time spent in the water. For most people, this is the optimal temperature for a comfortable beach experience.

It is important to note that these swimming tips and recommendations apply only in good weather. When the air temperature is below 68°F (20°C), and sometimes even below 77°F (25°C), swimming can be unpleasant even with relatively high water temperatures.

Analysis, Historical Data, and Forecast of Water Temperature

Water Temperature Chart in San Jose Over the Last 30 Days

Today the water temperature in San Jose is higher than the same day in previous years. The water temperature range here in June is from 14°C to 22°C. The water temperature has decreased over the past 7 days but has increased over the past month.

The forecasted water temperature values for San Jose are presented in the table below.

The actual water temperature values near the shore may differ by a few degrees from the stated values. For the development of the forecast, we use our own mathematical model that takes into account the current water temperature changes, historical data, and key weather trends, including wind strength and direction, and air temperature in each specific region.

Daily Water Temperature Chart

DateCurrentAverageForecast
Jun 2321.3°C18.5°C
Jun 2420.4°C18.5°C
Jun 2520.0°C18.5°C
Jun 2620.0°C18.5°C
Jun 2720.2°C18.5°C
Jun 2821.0°C18.5°C
Jun 2921.1°C18.5°C
Jun 3021.1°C18.5°C
Jul 120.0°C21.0°C
Jul 220.0°C20.9°C
Jul 320.0°C20.8°C
Jul 420.0°C20.7°C
Jul 520.0°C20.6°C
Jul 620.0°C20.5°C
Jul 720.0°C20.5°C
Jul 820.0°C20.5°C
* Current - Actual water temperature value
** Average - Average water temperature on this day in recent years
*** Forecast - Our water temperature forecast

Water Temperature Ranges in San Jose by Month

January

MinimumAverageMaximum
3°C6.5°C10°C

February

MinimumAverageMaximum
3°C7.5°C12°C

March

MinimumAverageMaximum
3°C9.5°C16°C

April

MinimumAverageMaximum
5°C11°C17°C

May

MinimumAverageMaximum
8°C13.4°C21°C

June

MinimumAverageMaximum
14°C18.5°C22°C

July

MinimumAverageMaximum
17°C20°C24°C

August

MinimumAverageMaximum
17°C21.4°C23°C

September

MinimumAverageMaximum
11°C17.6°C19°C

October

MinimumAverageMaximum
8°C13.3°C16°C

November

MinimumAverageMaximum
3°C8.1°C16°C

December

MinimumAverageMaximum
3°C4.7°C8°C

Monthly Water Temperature Histogram in San Jose

San Jose Weather

JULY 1

16°C / 32°C
clear sky

rain: 1% | wind: 20 km/h

JULY 2

16°C / 29°C
clear sky

rain: 1% | wind: 21 km/h

JULY 3

13°C / 30°C
clear sky

rain: 0% | wind: 19 km/h

JULY 4

13°C / 29°C
mainly clear

rain: 0% | wind: 21 km/h

Water Temperature in San Jose: General Trends and Swimming Opportunities

San Jose, California, is home to several creeks, rivers, and reservoirs, providing a variety of outdoor recreational opportunities. However, the water temperatures in the city’s waterways are generally not ideal for swimming, especially in the smaller creeks and rivers. The Guadalupe River, which runs through parts of San Jose, typically has water temperatures ranging from 55°F (13°C) to 65°F (18°C) throughout the year. These cooler temperatures make it more suitable for activities like fishing, kayaking, and tubing rather than swimming, as the water can feel too cold for a comfortable dip, particularly in the cooler months.

In addition to the rivers, San Jose offers access to reservoirs like Almaden Lake and Anderson Reservoir, which are often popular for recreational use. Water temperatures in these reservoirs can be warmer, especially during the summer, reaching around 70°F (21°C) to 80°F (27°C). These warmer temperatures make them more appealing for swimming, boating, and picnicking by the water. However, public access to some of these reservoirs may be restricted, and it’s important to check the specific regulations for each location.

During the summer months, when San Jose’s air temperatures often exceed 90°F (32°C), swimming in the warmer reservoirs can provide a much-needed escape from the heat. Public pools in San Jose also offer a more controlled environment for swimming, maintaining water temperatures between 78°F (26°C) and 82°F (28°C), which is comfortable for year-round swimming. Whether in local pools or reservoirs, San Jose provides a variety of water-based activities, though natural waterways tend to offer more scenic views than ideal conditions for swimming.

Geographical Location of San Jose

Frequently Asked Questions About San Jose and its Water Temperatures

What is the current water temperature in San Jose?

The water temperature today in San Jose is 70°F (21.1°C).

What is the water temperature in San Jose during the summer months?

The average water temperature in San Jose during the summer months is typically between 65°F to 71°F (19°C to 21°C), and it can reach up to 75°F (24°C) at its warmest. However, in some years, the temperature may exceed this range.

What is the water temperature in San Jose in May?

The average water temperature in San Jose in May ranges from 46°F to 70°F (8°C to 21°C).

What is the water temperature in San Jose in September?

The average water temperature in San Jose in September is typically between 52°F to 66°F (11°C to 19°C).

Is it possible to swim in any bodies of water in San Jose (United States, California), and what are the available options for doing so?

Yes, it's possible to swim in San Jose, California. The options include public swimming pools, aquatic centers, the San Tomas Aquino Creek Trail, and Almaden Lake.