Lough Beg — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Lough Beg, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Lough Beg today is 14.2°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 |
|---|---|---|---|
| SEP 16 | 14.4°C | 16.0°C | |
| SEP 17 | 14.5°C | 16.0°C | |
| SEP 18 | 14.1°C | 16.0°C | |
| SEP 19 | 13.6°C | 16.0°C | |
| SEP 20 | 13.5°C | 16.0°C | |
| SEP 21 | 13.4°C | 16.0°C | |
| SEP 22 | 12.6°C | 16.0°C | |
| SEP 23 | 14.2°C | 16.0°C | |
| SEP 24 | 16.0°C | 14.3°C | |
| SEP 25 | 16.0°C | 14.4°C | |
| SEP 26 | 16.0°C | 14.5°C | |
| SEP 27 | 16.0°C | 14.6°C | |
| SEP 28 | 16.0°C | 14.7°C | |
| SEP 29 | 16.0°C | 14.7°C | |
| SEP 30 | 16.0°C | 14.8°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 | 11°C |
| May | 9°C | 13°C | 18°C |
| June | 12°C | 17°C | 22°C |
| July | 14°C | 18°C | 23°C |
| August | 14°C | 18°C | 23°C |
| September | 11°C | 16°C | 20°C |
| October | 8°C | 11°C | 14°C |
| November | 4°C | 8°C | 12°C |
| December | 0°C | 4°C | 8°C |
Lough Beg: Weather Forecast
September 23
September 24
September 25
September 26
September 27
Location & Local Information
Lough Beg is a small, shallow lough fed by the River Bann, lying immediately north of the much larger Lough Neagh in County Londonderry. The water temperature in the River Bann flowing through this area reflects the temperate Northern Irish climate, remaining consistently chilly. In the winter months, temperatures hover between 3 and 7∘C (37 to 45∘F), and even during a warm summer, the river’s surface temperature is unlikely to rise much above 14 to 18∘C (57 to 64∘F).
Swimming is strongly discouraged and not officially permitted in this section of the River Bann and Lough Beg for several reasons. Most notably, the area, along with Lough Neagh, has recently experienced issues with blue-green algae blooms, which produce toxins harmful to human health and lethal to animals. The lough and its islands, such as Church Island, are also part of a protected nature reserve, designated as a Special Protection Area for its sensitive bird and wetland habitat. For visitors, the nearby Seamus Heaney HomePlace in Bellaghy celebrates the life and work of the Nobel laureate poet, offering a major cultural attraction away from the water.