Barrett Lake — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Barrett Lake, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Barrett Lake today is 19.3°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
⚠️ As of today, the minimum water temperature ranges from 65°F (18°C) to 68°F (20°C). This is already quite warm water, which is ideal for most people. Swimming becomes comfortable, and prolonged stays in the water do not cause discomfort. This temperature is perfect for family trips and for those who prefer warmer water. It is also comfortable for water sports such as surfing or swimming. 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 |
|---|---|---|---|
| OCT 26 | 21.0°C | 23.9°C | |
| OCT 27 | 21.8°C | 23.9°C | |
| OCT 28 | 21.3°C | 23.9°C | |
| OCT 29 | 20.9°C | 23.9°C | |
| OCT 30 | 21.2°C | 23.9°C | |
| OCT 31 | 20.7°C | 23.9°C | |
| NOV 1 | 20.3°C | 19.8°C | |
| NOV 2 | 19.3°C | 19.8°C | |
| NOV 3 | 19.8°C | 19.3°C | |
| NOV 4 | 19.8°C | 19.4°C | |
| NOV 5 | 19.8°C | 19.4°C | |
| NOV 6 | 19.8°C | 19.4°C | |
| NOV 7 | 19.8°C | 19.4°C | |
| NOV 8 | 19.8°C | 19.5°C | |
| NOV 9 | 19.8°C | 19.5°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 | 13°C | 18°C |
| February | 10°C | 14°C | 18°C |
| March | 10°C | 16°C | 23°C |
| April | 16°C | 20°C | 23°C |
| May | 19°C | 23°C | 25°C |
| June | 20°C | 24°C | 28°C |
| July | 23°C | 28°C | 32°C |
| August | 27°C | 30°C | 33°C |
| September | 24°C | 27°C | 30°C |
| October | 21°C | 24°C | 26°C |
| November | 15°C | 20°C | 24°C |
| December | 13°C | 16°C | 19°C |
Barrett Lake: Water Temperature by Location
Barrett Lake: Weather Forecast
November 3
November 4
November 5
November 6
November 7
Location & Local Information
Barrett Lake, a reservoir in California, experiences clear seasonal swings in water temperature. In summer the surface can warm to roughly 65–75°F (18–24°C) during heat waves and late-season low flows, making the upper layer relatively mild. In spring and fall the lake is cooler, typically ranging from about 45–60°F (7–15°C) as snowmelt or cooler air temperatures dominate. In winter the water commonly sits near freezing for freshwater, often around 39–45°F (4–7°C) at the surface and colder below the thermocline; deep water stays significantly colder year-round. These numbers vary with elevation, inflow, and recent weather, and deeper parts of the reservoir remain much colder than the surface.
Swimming at Barrett Lake is subject to the rules of the managing agency, and many California reservoirs restrict or discourage open-water swimming for public-supply, safety, and habitat reasons. Even where allowed, cold, layered water creates a risk of cold shock and rapid loss of muscle function, and submerged structures, steep drop-offs, and boat traffic add hazards. For those considering entering the water, confirm current local regulations with the water district or county, wear a life jacket in open water, and be mindful that seasonal temperatures can make even summer swims taxing and potentially dangerous.