Lough Macnean Lower — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Lough Macnean Lower, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Lough Macnean Lower today is 18.4°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
⚠️ As of today, the minimum water temperature ranges from 65°F (18°C) to 68°F (20°C). This is already quite warm water, which is ideal for most people. Swimming becomes comfortable, and prolonged stays in the water do not cause discomfort. This temperature is perfect for family trips and for those who prefer warmer water. It is also comfortable for water sports such as surfing or swimming. 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 |
|---|---|---|---|
| AUG 6 | 18.6°C | 22.0°C | |
| AUG 7 | 18.4°C | 22.0°C | |
| AUG 8 | 18.3°C | 22.0°C | |
| AUG 9 | 18.3°C | 22.0°C | |
| AUG 10 | 18.5°C | 22.0°C | |
| AUG 11 | 18.4°C | 22.0°C | |
| AUG 12 | 18.4°C | 22.0°C | |
| AUG 13 | 18.4°C | 22.0°C | |
| AUG 14 | 22.0°C | 18.6°C | |
| AUG 15 | 22.0°C | 18.8°C | |
| AUG 16 | 22.0°C | 18.9°C | |
| AUG 17 | 22.0°C | 19.1°C | |
| AUG 18 | 22.0°C | 19.3°C | |
| AUG 19 | 22.0°C | 19.5°C | |
| AUG 20 | 22.0°C | 19.7°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 | 14°C | 20°C | 26°C |
| July | 16°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 Macnean Lower: Water Temperature by Location
Lough Macnean Lower: Weather Forecast
August 14
August 15
August 16
August 17
August 18
August 19
Location & Local Information
Lough Macnean Lower lies on the border between County Fermanagh and County Cavan, surrounded by gentle hills and rural farmland. The lake’s water is typically cool throughout the year, reflecting the mild but variable climate of Northern Ireland. During winter, surface temperatures can drop to about 5–7 °C (41–45 °F), while in spring they slowly rise with the lengthening days. In summer, the water warms to around 15–18 °C (59–64 °F) at its peak, making short swims possible for those accustomed to cooler conditions. By autumn, the lake begins to cool again, often settling around 10 °C (50 °F) before winter returns.
Swimming is generally permitted in Lough Macnean Lower, though caution is advised due to uneven depths and occasional algae blooms in warmer months. Local open-water swimmers enjoy its clear stretches near access points, but wetsuits are recommended for comfort and safety most of the year. The lake’s scenic setting makes it popular for kayaking, fishing, and picnicking along the shores. Nearby attractions include the Marble Arch Caves Global Geopark, the village of Belcoo, and forest walks that provide peaceful views of both the Lower and Upper Lough Macnean, offering visitors a balance of relaxation and outdoor adventure.