Bessborough Reservoir — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Bessborough Reservoir, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Bessborough Reservoir today is 17.3°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 |
|---|---|---|---|
| SEP 15 | 18.2°C | 21.0°C | |
| SEP 16 | 18.7°C | 21.0°C | |
| SEP 17 | 18.8°C | 21.0°C | |
| SEP 18 | 18.4°C | 21.0°C | |
| SEP 19 | 18.5°C | 21.0°C | |
| SEP 20 | 17.7°C | 21.0°C | |
| SEP 21 | 18.4°C | 21.0°C | |
| SEP 22 | 17.8°C | 21.0°C | |
| SEP 23 | 21.0°C | 17.5°C | |
| SEP 24 | 21.0°C | 17.7°C | |
| SEP 25 | 21.0°C | 17.9°C | |
| SEP 26 | 21.0°C | 18.0°C | |
| SEP 27 | 21.0°C | 18.2°C | |
| SEP 28 | 21.0°C | 18.4°C | |
| SEP 29 | 21.0°C | 18.6°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 | 9°C | 13°C | 17°C |
| May | 11°C | 17°C | 22°C |
| June | 14°C | 21°C | 28°C |
| July | 19°C | 24°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 | 5°C | 9°C | 13°C |
| December | 4°C | 8°C | 11°C |
Bessborough Reservoir: Water Temperature by Location
Bessborough Reservoir: Weather Forecast
September 23
September 24
September 25
September 26
September 27
Location & Local Information
#Surrey
Bessborough Reservoir in Surrey is a managed water-supply reservoir and its surface temperature changes with the seasons. In winter surface temperatures typically sit around 4–8°C (39–46°F), rising in spring to roughly 6–14°C (43–57°F) as daylight and air temperatures increase. Summer surface values commonly reach 14–20°C (57–68°F) on average and can be higher during heatwaves, while autumn sees cooling back to about 8–14°C (46–57°F). Deeper water stays colder year-round, so these figures describe surface conditions on calm days rather than subsurface temperatures.
Swimming is generally not permitted at Bessborough Reservoir because it forms part of the public water supply and is managed for operational safety and water‑quality protection; submerged infrastructure, variable depths and water-management activities also create hazards. Those seeking water recreation usually use supervised lidos, club-organised Thames swims or other designated bathing sites nearby. The surrounding area offers pleasant alternatives such as riverside walks and cycle routes, the historic Runnymede meadows and the Thorpe Park theme park a short drive away.