Los Banos Reservoir — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Los Banos Reservoir, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Los Banos Reservoir today is 17.2°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
⚠️ As of today, the minimum water temperature ranges from 60°F (15°C) to 65°F (18°C). The water is comfortable for most people, making it an ideal range for water sports enthusiasts. The temperature does not cause significant discomfort, and swimming will be pleasant for the majority. However, it's important to remember that prolonged exposure to the water can still lead to cooling, so it's essential to monitor the time spent in the water, especially for children or elderly people. 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 |
|---|---|---|---|
| NOV 6 | 18.6°C | 16.5°C | |
| NOV 7 | 18.6°C | 16.5°C | |
| NOV 8 | 18.6°C | 16.5°C | |
| NOV 9 | 18.4°C | 16.5°C | |
| NOV 10 | 17.9°C | 16.5°C | |
| NOV 11 | 17.7°C | 16.5°C | |
| NOV 12 | 17.9°C | 16.5°C | |
| NOV 13 | 17.6°C | 16.5°C | |
| NOV 14 | 16.5°C | 17.2°C | |
| NOV 15 | 16.5°C | 17.1°C | |
| NOV 16 | 16.5°C | 17.1°C | |
| NOV 17 | 16.5°C | 17.1°C | |
| NOV 18 | 16.5°C | 17.0°C | |
| NOV 19 | 16.5°C | 17.0°C | |
| NOV 20 | 16.5°C | 17.0°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 | 6°C | 9°C | 13°C |
| February | 9°C | 12°C | 15°C |
| March | 11°C | 15°C | 20°C |
| April | 14°C | 18°C | 21°C |
| May | 16°C | 22°C | 27°C |
| June | 20°C | 26°C | 30°C |
| July | 22°C | 26°C | 30°C |
| August | 23°C | 27°C | 32°C |
| September | 22°C | 24°C | 27°C |
| October | 19°C | 22°C | 25°C |
| November | 12°C | 17°C | 20°C |
| December | 10°C | 13°C | 16°C |
Los Banos Reservoir: Water Temperature by Location
Los Banos Reservoir: Weather Forecast
November 14
November 15
November 16
November 17
November 18
Location & Local Information
Los Banos Reservoir experiences a broad seasonal swing in surface water temperatures. In winter months the reservoir commonly stays cool, often in the mid-40s to mid-50s °F (about 7–13 °C), while spring brings a gradual rise into the upper 50s to mid-60s °F (14–18 °C). By summer, surface temperatures typically warm to the mid-60s up into the low 80s °F (18–28 °C) depending on air heat and wind, and on hot, calm days localized surface layers can reach the upper 70s or low 80s °F (25–28 °C). Autumn sees a steady decline as cooler nights mix the water and bring temperatures back toward the spring range. Subsurface temperatures remain cooler than surface readings and change more slowly with the seasons.
Swimming can occur at Los Banos Reservoir in areas where public access is allowed, but it is not a managed, lifeguarded swim beach and local rules, signage, or seasonal closures may restrict water contact. Because the reservoir is used for irrigation and wildlife habitat, water quality can vary; agricultural runoff, turbidity, and occasional algal blooms can make swimming inadvisable at times. Visitors should check current advisories, respect posted restrictions, and be aware that cooler shoulder-season temperatures increase the risk of cold-water shock even if surface air is warm.