Lake del Valle — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Lake del Valle, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Lake del Valle today is 21.1°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
✅ As of today, the minimum water temperature 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.
Water Temperature Chart Over the Last 30 Days
Table of Daily Sea Temperature Data
| Date | Current | Average | Forecast |
|---|---|---|---|
| JUN 3 | 20.3°C | 24.0°C | |
| JUN 4 | 20.6°C | 24.0°C | |
| JUN 5 | 20.9°C | 24.0°C | |
| JUN 6 | 21.0°C | 24.0°C | |
| JUN 7 | 21.6°C | 24.0°C | |
| JUN 8 | 21.9°C | 24.0°C | |
| JUN 10 | 21.1°C | 24.0°C | |
| JUN 11 | 24.0°C | 21.2°C | |
| JUN 12 | 24.0°C | 21.4°C | |
| JUN 13 | 24.0°C | 21.5°C | |
| JUN 14 | 24.0°C | 21.7°C | |
| JUN 15 | 24.0°C | 21.8°C | |
| JUN 16 | 24.0°C | 22.0°C | |
| JUN 17 | 24.0°C | 22.1°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 | 8°C | 11°C | 13°C |
| February | 9°C | 12°C | 14°C |
| March | 11°C | 15°C | 19°C |
| April | 12°C | 17°C | 21°C |
| May | 15°C | 20°C | 24°C |
| June | 19°C | 24°C | 29°C |
| July | 20°C | 25°C | 30°C |
| August | 20°C | 25°C | 29°C |
| September | 20°C | 24°C | 27°C |
| October | 17°C | 21°C | 25°C |
| November | 11°C | 16°C | 19°C |
| December | 10°C | 13°C | 15°C |
Lake del Valle: Water Temperature by Location
Lake del Valle: Weather Forecast
June 9
June 10
June 11
June 12
Location & Local Information
Lake Del Valle sits in the East Bay foothills and tends to have cool water year-round because it is a deep reservoir fed by springs and runoff. Surface temperatures in summer commonly reach about 68–75°F (20–24°C) on warm afternoons, though the bulk of the water and deeper layers stay colder. In spring and fall, surface readings more typically fall in the 55–68°F (13–20°C) range, while winter temperatures commonly drop to roughly 45–55°F (7–13°C). These figures vary with seasonal rainfall, air temperature, and how recently inflows have refreshed the reservoir; wind and boating also create thermal mixing that can make conditions chillier than a calm surface reading suggests.
Swimming at Lake Del Valle is not generally allowed under park rules, primarily for public safety and resource protection. The reservoir is used for water storage and boating, with boat traffic, steep shorelines, and cold, changeable temperatures that heighten drowning risk. In addition, restrictions help limit contamination in a managed water supply environment and reduce conflicts with powered watercraft. Visitors typically use the area for boating, fishing, hiking, and picnicking, and should consult park signage or staff for current regulations and any seasonal exceptions.