Calf Hey Reservoir — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Calf Hey Reservoir, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Calf Hey Reservoir today is 14.1°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
⚠️ As of today, the minimum water temperature ranges from 54°F (12°C) to 60°F (15°C). The water is significantly warmer, and swimming becomes possible for most people. However, caution may still be required for prolonged stays in the water, as extended exposure can cause discomfort. This is a suitable temperature range for short swims and for those accustomed to cooler water. For more comfortable swimming, it is recommended to use proper gear. 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 3 | 13.9°C | 20.0°C | |
| JUN 4 | 13.9°C | 20.0°C | |
| JUN 5 | 13.9°C | 20.0°C | |
| JUN 6 | 13.9°C | 20.0°C | |
| JUN 7 | 14.2°C | 20.0°C | |
| JUN 8 | 14.2°C | 20.0°C | |
| JUN 10 | 14.1°C | 20.0°C | |
| JUN 11 | 20.0°C | 14.4°C | |
| JUN 12 | 20.0°C | 14.7°C | |
| JUN 13 | 20.0°C | 15.0°C | |
| JUN 14 | 20.0°C | 15.3°C | |
| JUN 15 | 20.0°C | 15.6°C | |
| JUN 16 | 20.0°C | 15.9°C | |
| JUN 17 | 20.0°C | 16.2°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 | 1°C | 5°C | 8°C |
| February | 1°C | 5°C | 8°C |
| March | 2°C | 6°C | 9°C |
| April | 6°C | 10°C | 13°C |
| May | 9°C | 15°C | 21°C |
| June | 13°C | 20°C | 26°C |
| July | 17°C | 22°C | 27°C |
| August | 16°C | 21°C | 26°C |
| September | 12°C | 18°C | 23°C |
| October | 9°C | 13°C | 17°C |
| November | 4°C | 8°C | 11°C |
| December | 1°C | 5°C | 8°C |
Calf Hey Reservoir: Water Temperature by Location
Calf Hey Reservoir: Weather Forecast
June 9
June 10
June 11
June 12
June 13
Location & Local Information
#Lancashire
Calf Hey Reservoir, set in the Rossendale hills of Lancashire, typically holds cool water year-round. Seasonal surface temperatures commonly range from about 2–6 °C (36–43 °F) in winter, 6–12 °C (43–54 °F) in spring and autumn, and perhaps 12–20 °C (54–68 °F) on warmer summer days; deeper water remains colder. These figures vary with weather, recent rainfall and how long sunny spells persist, so even summer dips can feel bracing compared with coastal bathing.
Swimming at Calf Hey is not officially promoted; the reservoir and surrounding impoundments are usually managed by a water company or local authority and open-water bathing is discouraged because of safety risks, water quality concerns and hidden hazards such as steep sides and underwater obstacles. Despite this, some experienced wild swimmers may use the site at their own risk, taking precautions against cold-water shock. The area is nevertheless popular for walking, birdwatching and cycling, with attractive Rossendale countryside, woodlands and nearby towns such as Rawtenstall offering cafes, nature reserves and trail access.
Nearby Lakes
- Holden Wood Reservoir
- Ogden Reservoir Lancashire
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- Turton and Entwistle Reservoir
- Jumbles Reservoir
- Upper Roddlesworth Reservoir
- Ashworth Moor Reservoir
- Lower Roddlesworth Reservoir
- Dingle Reservoir
- Belmont Reservoir
- Rake Brook Reservoir
- Greenbooth Reservoir
- Yarrow Reservoir
- Manchester, Bolton and Bury Reservoir
- High Rid Reservoir