Darwell Reservoir — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Darwell Reservoir, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Darwell Reservoir today is 16.8°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 16 | 18.3°C | 18.0°C | |
| SEP 17 | 18.3°C | 18.0°C | |
| SEP 18 | 17.9°C | 18.0°C | |
| SEP 19 | 18.1°C | 18.0°C | |
| SEP 20 | 17.1°C | 18.0°C | |
| SEP 21 | 17.5°C | 18.0°C | |
| SEP 22 | 17.4°C | 18.0°C | |
| SEP 24 | 18.0°C | 16.9°C | |
| SEP 25 | 18.0°C | 16.9°C | |
| SEP 26 | 18.0°C | 17.0°C | |
| SEP 27 | 18.0°C | 17.0°C | |
| SEP 28 | 18.0°C | 17.1°C | |
| SEP 29 | 18.0°C | 17.2°C | |
| SEP 30 | 18.0°C | 17.2°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 | 4°C | 8°C | 11°C |
| February | 4°C | 8°C | 11°C |
| March | 5°C | 9°C | 12°C |
| April | 7°C | 11°C | 14°C |
| May | 7°C | 13°C | 20°C |
| June | 14°C | 20°C | 25°C |
| July | 16°C | 21°C | 26°C |
| August | 17°C | 22°C | 27°C |
| September | 12°C | 18°C | 23°C |
| October | 7°C | 11°C | 14°C |
| November | 5°C | 9°C | 12°C |
| December | 4°C | 8°C | 11°C |
Darwell Reservoir: Water Temperature by Location
Darwell Reservoir: Weather Forecast
September 23
September 24
September 25
September 26
September 27
Location & Local Information
#East Sussex
Darwell Reservoir in East Sussex sits in a wooded valley and tends to run cool through much of the year. Typical water temperatures range from about 4–8 °C (39–46 °F) in winter, rising to roughly 6–14 °C (43–57 °F) in spring. In summer the surface may warm to around 14–20 °C (57–68 °F) on sunnier days, while autumn temperatures generally fall back to 8–14 °C (46–57 °F). These are approximate averages and local conditions such as air temperature, wind and rainfall can change how quickly the water warms or cools.
Swimming in Darwell Reservoir is generally not permitted. As a working reservoir supplying local water and being surrounded by steep banks and hidden depths, operators restrict bathing for both water quality and safety reasons — cold water shock and underwater hazards are risks even on warm days. Visitors instead enjoy the perimeter footpaths, birdwatching and peaceful woodland. Nearby attractions include the historic town of Battle, the coastal resorts around Hastings and the broader High Weald countryside, all of which offer additional walking, cycling and sightseeing opportunities.