Chew Valley Lake — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Chew Valley Lake, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Chew Valley Lake today is 20.4°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 |
|---|---|---|---|
| JUL 16 | 20.5°C | 21.8°C | |
| JUL 17 | 20.3°C | 21.8°C | |
| JUL 18 | 20.3°C | 21.8°C | |
| JUL 19 | 20.3°C | 21.8°C | |
| JUL 20 | 20.3°C | 21.8°C | |
| JUL 21 | 20.4°C | 21.8°C | |
| JUL 22 | 20.4°C | 21.8°C | |
| JUL 23 | 20.4°C | 21.8°C | |
| JUL 24 | 21.8°C | 20.5°C | |
| JUL 25 | 21.8°C | 20.5°C | |
| JUL 26 | 21.8°C | 20.6°C | |
| JUL 27 | 21.8°C | 20.7°C | |
| JUL 28 | 21.8°C | 20.8°C | |
| JUL 29 | 21.8°C | 20.8°C | |
| JUL 30 | 21.8°C | 20.9°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 | 7°C | 10°C |
| February | 4°C | 8°C | 11°C |
| March | 6°C | 10°C | 13°C |
| April | 8°C | 13°C | 17°C |
| May | 10°C | 16°C | 22°C |
| June | 11°C | 20°C | 28°C |
| July | 14°C | 22°C | 29°C |
| August | 18°C | 23°C | 28°C |
| September | 16°C | 21°C | 26°C |
| October | 11°C | 15°C | 19°C |
| November | 6°C | 10°C | 13°C |
| December | 4°C | 8°C | 11°C |
Chew Valley Lake: Water Temperature by Location
Chew Valley Lake: Weather Forecast
July 24
July 25
July 26
July 27
Location & Local Information
#Somerset
Chew Valley Lake in Somerset is a large reservoir with water temperatures that vary noticeably through the year. In winter surface temperatures typically sit around 2–6 °C (36–43 °F), rising in spring to roughly 6–12 °C (43–54 °F). Summer can warm the shallows to about 15–22 °C (59–72 °F) on warmer spells, while autumn sees cooling back to around 8–14 °C (46–57 °F). These figures are approximate and conditions change with air temperature, wind and depth; deeper areas remain significantly cooler than the surface.
Swimming in the lake is generally not permitted; the site is a working reservoir supplying water and is managed to protect water quality, wildlife and visitor safety. Steep banks, underwater hazards and boat activity add to the risks, so organised bathing is discouraged and signage advises against wild swimming. Visitors instead enjoy birdwatching, nature trails, cycling and picnicking around the reserve, and nearby attractions include the villages of Chew Magna and Chew Stoke, the Mendip Hills and other Somerset countryside suited to walking and photography.