Lough Key — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Lough Key, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Lough Key today is 18.8°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 | 18.8°C | 22.0°C | |
| AUG 7 | 18.4°C | 22.0°C | |
| AUG 8 | 18.4°C | 22.0°C | |
| AUG 9 | 18.4°C | 22.0°C | |
| AUG 10 | 18.6°C | 22.0°C | |
| AUG 11 | 18.5°C | 22.0°C | |
| AUG 12 | 18.5°C | 22.0°C | |
| AUG 13 | 18.8°C | 22.0°C | |
| AUG 14 | 22.0°C | 19.0°C | |
| AUG 15 | 22.0°C | 19.1°C | |
| AUG 16 | 22.0°C | 19.3°C | |
| AUG 17 | 22.0°C | 19.4°C | |
| AUG 18 | 22.0°C | 19.6°C | |
| AUG 19 | 22.0°C | 19.8°C | |
| AUG 20 | 22.0°C | 19.9°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 | 9°C |
| March | 3°C | 7°C | 10°C |
| April | 6°C | 10°C | 14°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 | 4°C | 3°C | 9°C |
Lough Key: Water Temperature by Location
Lough Key: Weather Forecast
August 14
August 15
August 16
August 17
Location & Local Information
Lough Key, nestled in County Roscommon, is a picturesque lake that forms the centrepiece of a popular forest park. Its freshwater temperatures reflect the cool Irish climate, with distinct seasonal ranges. During the winter, the water is cold, typically dropping to between 5∘C and 9∘C (41∘F to 48∘F). Summer allows for some surface warming, with water temperatures usually peaking in the pleasant but still refreshing range of 14∘C to 17∘C (57∘F to 63∘F).
Swimming is generally permitted in Lough Key, and it is a popular activity, particularly in a sheltered area within the Forest Park known for its calm waters. However, it is essential for visitors to know that there are no lifeguards on duty, and all swimming is undertaken at one’s own risk. The park hosts organised open-water swimming events, indicating its suitability for the activity. Beyond the water, the surrounding Lough Key Forest and Activity Park offers unique attractions, including a treetop Canopy Walk and the puzzle-based Boda Borg challenge.