Staines Reservoirs — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Staines Reservoirs, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Staines Reservoirs 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 |
|---|---|---|---|
| JUN 24 | 20.1°C | 21.5°C | |
| JUN 25 | 20.2°C | 21.5°C | |
| JUN 26 | 20.2°C | 21.5°C | |
| JUN 27 | 21.4°C | 21.5°C | |
| JUN 28 | 21.5°C | 21.5°C | |
| JUN 29 | 21.5°C | 21.5°C | |
| JUN 30 | 21.6°C | 21.5°C | |
| JUL 2 | 24.0°C | 20.6°C | |
| JUL 3 | 24.0°C | 20.8°C | |
| JUL 4 | 24.0°C | 20.9°C | |
| JUL 5 | 24.0°C | 21.1°C | |
| JUL 6 | 24.0°C | 21.3°C | |
| JUL 7 | 24.0°C | 21.5°C | |
| JUL 8 | 24.0°C | 21.7°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 | 22°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 |
Staines Reservoirs: Water Temperature by Location
Staines Reservoirs: Weather Forecast
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July 4
July 5
July 6
Location & Local Information
#Surrey
Staines Reservoirs, on the outskirts of Staines-upon-Thames in Surrey, are large drinking-water storage basins where water temperature varies with the seasons. Surface temperatures in winter typically sit around 4–7 °C (39–45 °F), rise through spring to roughly 6–12 °C (43–54 °F), reach summer highs near 14–20 °C (57–68 °F), and fall back to 8–14 °C (46–57 °F) in autumn. Deeper water remains colder year-round, so even in warm months the reservoirs can feel chilly compared with shallow lakes.
Swimming is not permitted at the reservoirs: they are managed for public water supply and access is restricted for safety, water-quality protection and operational reasons. Strong currents, depth and infrastructure make unsupervised bathing hazardous, and penalties can apply for unauthorised entry. Visitors do, however, enjoy nearby open spaces and wildlife: the adjacent nature reserve and river corridors are good for birdwatching and walking, while Runnymede, Windsor Great Park and the town centre of Staines-upon-Thames offer historical sites, green space and visitor facilities within a short drive.