Lough Neagh — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Lough Neagh, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Lough Neagh today is 17.7°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
⚠️ As of today, the minimum water temperature ranges from 60°F (15°C) to 65°F (18°C). The water is comfortable for most people, making it an ideal range for water sports enthusiasts. The temperature does not cause significant discomfort, and swimming will be pleasant for the majority. However, it's important to remember that prolonged exposure to the water can still lead to cooling, so it's essential to monitor the time spent in the water, especially for children or elderly people. 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 | 18.0°C | 19.9°C | |
| JUN 26 | 18.0°C | 19.9°C | |
| JUN 27 | 19.1°C | 19.9°C | |
| JUN 28 | 19.3°C | 19.9°C | |
| JUN 29 | 19.1°C | 19.9°C | |
| JUN 30 | 19.2°C | 19.9°C | |
| JUL 1 | 17.8°C | 22.0°C | |
| JUL 2 | 17.7°C | 22.0°C | |
| JUL 3 | 22.0°C | 17.9°C | |
| JUL 4 | 22.0°C | 18.1°C | |
| JUL 5 | 22.0°C | 18.3°C | |
| JUL 6 | 22.0°C | 18.6°C | |
| JUL 7 | 22.0°C | 18.8°C | |
| JUL 8 | 22.0°C | 19.0°C | |
| JUL 9 | 22.0°C | 19.2°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 | 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 | 17°C | 22°C | 27°C |
| August | 17°C | 22°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 | 3°C | 6°C | 9°C |
Lough Neagh: Water Temperature by Location
Lough Neagh: Weather Forecast
July 3
July 4
July 5
July 6
Location & Local Information
Lough Neagh, the largest lake by surface area in the British Isles, is a vast body of freshwater with characteristically cool temperatures throughout the year. The surface water typically ranges from approximately 6∘C (43∘F) in the winter months to a summer high that might peak around 17∘C (63∘F). Due to its sheer size, it is notoriously exposed and can become rough very quickly. Swimming is permitted, and it is a popular spot for dedicated open water and cold water swimmers, with specific access points like Ballyronan Marina being commonly used.
However, swimming carries distinct risks due to the size and exposed nature of the lough, and more recently, concerns have been raised about water quality, particularly the presence of blue-green algae blooms during warmer months, which can be harmful to humans and animals. Swimmers are always advised to be vigilant, check water conditions and any official warnings before entering. Beyond water activities, the area offers attractions such as the Seamus Heaney HomePlace literary centre and the diverse wildlife and scenic trails of the Oxford Island National Nature Reserve.