Arnfield Reservoir — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Arnfield Reservoir, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Arnfield Reservoir today is 18.5°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
⚠️ As of today, the minimum water temperature ranges from 65°F (18°C) to 68°F (20°C). This is already quite warm water, which is ideal for most people. Swimming becomes comfortable, and prolonged stays in the water do not cause discomfort. This temperature is perfect for family trips and for those who prefer warmer water. It is also comfortable for water sports such as surfing or swimming. 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 25 | 16.4°C | 20.5°C | |
| JUN 26 | 16.4°C | 20.5°C | |
| JUN 27 | 18.2°C | 20.5°C | |
| JUN 28 | 18.2°C | 20.5°C | |
| JUN 29 | 18.3°C | 20.5°C | |
| JUN 30 | 18.4°C | 20.5°C | |
| JUL 1 | 18.5°C | 23.0°C | |
| JUL 2 | 18.5°C | 23.0°C | |
| JUL 3 | 23.0°C | 18.7°C | |
| JUL 4 | 23.0°C | 19.0°C | |
| JUL 5 | 23.0°C | 19.2°C | |
| JUL 6 | 23.0°C | 19.4°C | |
| JUL 7 | 23.0°C | 19.6°C | |
| JUL 8 | 23.0°C | 19.9°C | |
| JUL 9 | 23.0°C | 20.1°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 | 2°C | 6°C | 9°C |
| February | 2°C | 6°C | 9°C |
| March | 3°C | 7°C | 10°C |
| April | 7°C | 11°C | 14°C |
| May | 9°C | 16°C | 22°C |
| June | 13°C | 21°C | 27°C |
| July | 18°C | 23°C | 28°C |
| August | 17°C | 22°C | 27°C |
| September | 13°C | 19°C | 24°C |
| October | 10°C | 14°C | 18°C |
| November | 4°C | 8°C | 12°C |
| December | 2°C | 6°C | 9°C |
Arnfield Reservoir: Water Temperature by Location
Arnfield Reservoir: Weather Forecast
July 3
July 4
July 5
July 6
Location & Local Information
#Derbyshire
Arnfield Reservoir in Derbyshire is an upland storage reservoir whose water is generally cool and varies with the seasons and depth. In spring (March–May) surface temperatures commonly range from about 4–10 °C (39–50 °F). In summer (June–August) the surface typically warms to roughly 12–18 °C (54–64 °F), sometimes reaching around 20 °C (68 °F) on warm days. Autumn sees temperatures fall back to about 6–12 °C (43–54 °F), while winter surface readings are often between 0–6 °C (32–43 °F); deeper water remains markedly colder throughout the year.
Swimming at Arnfield is not actively promoted and may be restricted by the water company because the reservoir forms part of the local supply and because of safety hazards such as cold‑water shock, submerged obstacles and variable currents. Some wild swimmers do visit, but entry is at personal risk and local notices should be followed. The area is nevertheless popular for walking and cycling along the Longdendale Trail, with neighbouring reservoirs like Torside and Woodhead and upland Peak District terrain providing further outdoor attractions.