San Jose — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in San Jose, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in San Jose today is 27.8°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
✅ As of today, the minimum water temperature ranges from 79°F (26°C) to 82°F (28°C). This is very warm water, allowing for extended stays without any discomfort. Swimming in these conditions will be particularly enjoyable, making it the ideal temperature range for those who want to relax in the sea. Additionally, water in this temperature range is suitable for children and elderly people, as it is comfortable for prolonged stays. 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.
Water Temperature Chart Over the Last 30 Days
Table of Daily Sea Temperature Data
| Date | Current | Average | Forecast |
|---|---|---|---|
| JUL 18 | 28.2°C | 22.6°C | |
| JUL 19 | 27.8°C | 22.6°C | |
| JUL 20 | 27.7°C | 22.6°C | |
| JUL 21 | 27.8°C | 22.6°C | |
| JUL 22 | 27.8°C | 22.6°C | |
| JUL 23 | 28.4°C | 22.6°C | |
| JUL 24 | 27.8°C | 22.6°C | |
| JUL 25 | 27.8°C | 22.6°C | |
| JUL 26 | 22.6°C | 27.5°C | |
| JUL 27 | 22.6°C | 27.2°C | |
| JUL 28 | 22.6°C | 26.8°C | |
| JUL 29 | 22.6°C | 26.5°C | |
| JUL 30 | 22.6°C | 26.2°C | |
| JUL 31 | 22.6°C | 25.9°C | |
| AUG 1 | 21.4°C | 25.6°C |
* Current - Actual water temperature value
** Average - Average water temperature on this day in recent years
*** Forecast - Our water temperature forecast
Actual nearshore water temperatures may fluctuate by several degrees from the reported values, especially following heavy rainfall or extended periods of strong winds. Certain wind patterns can cause colder, deeper waters to rise and replace the sun-warmed surface water, leading to noticeable variations.
Our forecast is based on a proprietary mathematical model that considers real-time water temperature changes, historical trends, key weather patterns, wind strength and direction, and air temperature specific to each region. Additionally, we incorporate data from other resorts to enhance accuracy.
Monthly Water Temperature Range (Min, Max & Average)
| Month | Min | Avg | Max |
|---|---|---|---|
| January | 3°C | 8°C | 13°C |
| February | 3°C | 9°C | 15°C |
| March | 3°C | 12°C | 20°C |
| April | 5°C | 12°C | 19°C |
| May | 8°C | 16°C | 25°C |
| June | 14°C | 20°C | 26°C |
| July | 17°C | 23°C | 29°C |
| August | 17°C | 21°C | 23°C |
| September | 11°C | 17°C | 23°C |
| October | 8°C | 15°C | 22°C |
| November | 3°C | 11°C | 19°C |
| December | 8°C | 11°C | 15°C |
San Jose: Weather Forecast
July 26
July 27
July 28
July 29
July 30
Location & Local Information
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.