Ben Crom Reservoir — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Ben Crom Reservoir, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Ben Crom Reservoir today is 8.3°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
❌ As of today, the minimum water temperature ranges from 47°F (8°C) to 50°F (10°C). This is still cool water, suitable only for experienced swimmers or those accustomed to cold water. Swimming in such conditions is possible, but not recommended for prolonged periods. Extra caution should be taken during extended exposure, as the cold water can cause heat loss and lead to hypothermia. For added comfort, special clothing can be used. 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 |
|---|---|---|---|
| OCT 28 | 9.1°C | 12.0°C | |
| OCT 29 | 9.2°C | 12.0°C | |
| OCT 30 | 8.9°C | 12.0°C | |
| OCT 31 | 8.2°C | 12.0°C | |
| NOV 1 | 8.7°C | 8.0°C | |
| NOV 2 | 8.2°C | 8.0°C | |
| NOV 3 | 8.4°C | 8.0°C | |
| NOV 4 | 8.3°C | 8.0°C | |
| NOV 5 | 8.0°C | 8.3°C | |
| NOV 6 | 8.0°C | 8.3°C | |
| NOV 7 | 8.0°C | 8.3°C | |
| NOV 8 | 8.0°C | 8.2°C | |
| NOV 9 | 8.0°C | 8.2°C | |
| NOV 10 | 8.0°C | 8.2°C | |
| NOV 11 | 8.0°C | 8.2°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 | 0°C | 4°C | 7°C |
| February | 0°C | 4°C | 7°C |
| March | 2°C | 6°C | 9°C |
| April | 5°C | 9°C | 12°C |
| May | 9°C | 14°C | 20°C |
| June | 12°C | 19°C | 25°C |
| July | 15°C | 21°C | 26°C |
| August | 15°C | 21°C | 26°C |
| September | 12°C | 18°C | 23°C |
| October | 8°C | 12°C | 15°C |
| November | 4°C | 8°C | 11°C |
| December | 0°C | 4°C | 8°C |
Ben Crom Reservoir: Water Temperature by Location
Ben Crom Reservoir: Weather Forecast
November 5
November 6
November 7
November 8
November 9
Location & Local Information
Ben Crom Reservoir, nestled high in the Mourne Mountains of County Down, Northern Ireland, is an integral part of the region's drinking water supply scheme. Due to its altitude and depth, the water maintains a very low and dangerously consistent temperature throughout the year. Even in the warmest summer months, the water temperature rarely exceeds 10∘C to 12∘C (50∘F to 54∘F), and can drop as low as 4∘C to 7∘C (39∘F to 45∘F) in winter.
Swimming and other water-based activities are strictly prohibited in Ben Crom Reservoir by Northern Ireland Water. This ban is in place to save lives, as the cold water can induce fatal cold-water shock within minutes, regardless of air temperature. Furthermore, the operational nature of the reservoir means there are hidden hazards such as machinery and strong, unpredictable currents caused by water abstraction. Visitors to this breathtaking area, which is part of the Mourne Area of Outstanding Natural Beauty, are encouraged to enjoy the scenic walks, including those along the famous Mourne Wall, or explore the nearby Silent Valley Mountain Park and the Slieve Binnian trails.