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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

69°F

TODAY

71°F

YESTERDAY

69°F

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 57°F to 72°F. The water temperature is trending upward, and it has increased both over the past 30 days and the past week.

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 369°F65°F
Jun 469°F65°F
Jun 568°F65°F
Jun 668°F65°F
Jun 771°F65°F
Jun 871°F65°F
Jun 971°F65°F
Jun 1069°F65°F
Jun 1165°F69°F
Jun 1265°F69°F
Jun 1365°F69°F
Jun 1465°F69°F
Jun 1565°F68°F
Jun 1665°F68°F
Jun 1765°F68°F
Jun 1865°F68°F
* 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
37°F44°F50°F

February

MinimumAverageMaximum
37°F46°F54°F

March

MinimumAverageMaximum
37°F49°F61°F

April

MinimumAverageMaximum
41°F52°F63°F

May

MinimumAverageMaximum
46°F56°F70°F

June

MinimumAverageMaximum
57°F65°F72°F

July

MinimumAverageMaximum
63°F68°F75°F

August

MinimumAverageMaximum
63°F71°F73°F

September

MinimumAverageMaximum
52°F64°F66°F

October

MinimumAverageMaximum
46°F56°F61°F

November

MinimumAverageMaximum
37°F47°F61°F

December

MinimumAverageMaximum
37°F40°F46°F

Monthly Water Temperature Histogram in San Jose

San Jose Weather

JUNE 10

55°F / 84°F
clear sky

rain: 0% | wind: 12 mph

JUNE 11

55°F / 81°F
overcast

rain: 0% | wind: 12 mph

JUNE 12

55°F / 75°F
clear sky

rain: 0% | wind: 14 mph

JUNE 13

54°F / 72°F
overcast

rain: 0% | wind: 12 mph

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 69°F (20.7°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.