Twitchell Reservoir — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Twitchell Reservoir, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Twitchell Reservoir today is 22.9°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 23 | 21.9°C | 22.8°C | |
| JUN 24 | 22.6°C | 22.8°C | |
| JUN 25 | 22.6°C | 22.8°C | |
| JUN 26 | 22.4°C | 22.8°C | |
| JUN 27 | 22.5°C | 22.8°C | |
| JUN 28 | 22.7°C | 22.8°C | |
| JUN 29 | 23.7°C | 22.8°C | |
| JUN 30 | 22.9°C | 22.8°C | |
| JUL 1 | 26.0°C | 23.1°C | |
| JUL 2 | 26.0°C | 23.2°C | |
| JUL 3 | 26.0°C | 23.4°C | |
| JUL 4 | 26.0°C | 23.5°C | |
| JUL 5 | 26.0°C | 23.7°C | |
| JUL 6 | 26.0°C | 23.8°C | |
| JUL 7 | 26.0°C | 24.0°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 | 11°C | 14°C | 16°C |
| February | 8°C | 12°C | 16°C |
| March | 8°C | 14°C | 20°C |
| April | 15°C | 17°C | 20°C |
| May | 18°C | 21°C | 24°C |
| June | 20°C | 23°C | 25°C |
| July | 22°C | 26°C | 30°C |
| August | 22°C | 28°C | 34°C |
| September | 22°C | 27°C | 32°C |
| October | 20°C | 23°C | 26°C |
| November | 15°C | 21°C | 26°C |
| December | 13°C | 16°C | 19°C |
Twitchell Reservoir: Water Temperature by Location
Twitchell Reservoir: Weather Forecast
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Location & Local Information
Twitchell Reservoir, located in coastal central California, experiences notable seasonal variation in surface water temperature driven by air temperature, inflow from the Cuyama River, and reservoir depth. In winter the surface typically sits in the mid-40s to mid-50s °F (about 7–13 °C), spring warms into the 50s–mid-60s °F (roughly 10–18 °C), and summer can push surface temperatures into the mid-60s up to the high 70s °F (approximately 18–26 °C) during warm, dry years. Early fall often remains pleasant, with surface readings commonly in the high 50s to low 70s °F (about 14–22 °C). Deeper water remains cooler year-round, so actual swimming temperatures depend on how much mixing and stratification occur at the time.
Swimming at Twitchell is generally discouraged and in some situations subject to restrictions because it is a managed water-storage reservoir rather than a purpose-built recreational lake. Factors that limit safe swimming include fluctuating water levels and steep or muddy banks, cold and variable temperatures below the surface, boat traffic and wakes, potential for strong currents near releases, and management or water-quality considerations. Visitors should check current local rules and advisories before entering the water and take standard open-water safety precautions if swimming is permitted.