Silent Valley Reservoir — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Silent Valley Reservoir, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Silent Valley Reservoir today is 10.8°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
❌ As of today, the minimum water temperature ranges from 50°F (10°C) to 54°F (12°C). The water is slightly warmer, but still cool for most people. Swimming in such conditions is possible, but for most people, the time spent in the water should be limited to avoid hypothermia. Even experienced swimmers may feel discomfort if they stay in the water for too long. To improve comfort and safety, a wetsuit 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 7 | 12.1°C | 13.0°C | |
| OCT 8 | 12.0°C | 13.0°C | |
| OCT 9 | 11.7°C | 13.0°C | |
| OCT 10 | 11.4°C | 13.0°C | |
| OCT 11 | 11.6°C | 13.0°C | |
| OCT 12 | 11.2°C | 13.0°C | |
| OCT 13 | 10.6°C | 13.0°C | |
| OCT 14 | 11.1°C | 13.0°C | |
| OCT 15 | 13.0°C | 10.9°C | |
| OCT 16 | 13.0°C | 11.0°C | |
| OCT 17 | 13.0°C | 11.1°C | |
| OCT 18 | 13.0°C | 11.2°C | |
| OCT 19 | 13.0°C | 11.4°C | |
| OCT 20 | 13.0°C | 11.5°C | |
| OCT 21 | 13.0°C | 11.6°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 | 3°C | 7°C | 10°C |
| April | 6°C | 10°C | 13°C |
| May | 10°C | 15°C | 21°C |
| June | 13°C | 20°C | 26°C |
| July | 16°C | 22°C | 27°C |
| August | 15°C | 21°C | 27°C |
| September | 13°C | 19°C | 24°C |
| October | 9°C | 13°C | 17°C |
| November | 5°C | 9°C | 12°C |
| December | 0°C | 4°C | 9°C |
Silent Valley Reservoir: Water Temperature by Location
Silent Valley Reservoir: Weather Forecast
October 15
October 16
October 17
October 18
Location & Local Information
The Silent Valley Reservoir, nestled high in the Mourne Mountains, is a significant source of drinking water, and its temperature reflects the cool, mountain environment. While precise public data for the reservoir itself is limited, temperatures in such deep, elevated bodies of water are considerably colder than coastal waters. A general seasonal range would see the water reach lows near 4∘C to 7∘C (39∘F to 45∘F) in winter, and only occasionally exceeding 12∘C to 15∘C (54∘F to 59∘F) on the surface during peak summer months.
Swimming and other water activities are strictly forbidden in Silent Valley Reservoir. The primary reason for this prohibition is that the reservoir supplies public drinking water, and any recreational activity could compromise water quality and hygiene standards. Furthermore, reservoirs pose severe safety hazards, including very sudden changes in depth, strong underwater currents, hidden mechanical equipment, and the risk of cold water shock due to the consistently low temperatures. Visitors instead enjoy the stunning scenery through various walking trails, including those that lead to the Ben Crom Dam and run alongside sections of the famous Mourne Wall.