Lough Arrow — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Lough Arrow, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Lough Arrow today is 20.2°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
✅ As of today, the minimum water temperature ranges from 68°F (20°C) to 74°F (23°C). The water is warm and pleasant for swimming, and in this range, one can stay in the water for extended periods without the risk of hypothermia. This is the ideal temperature for relaxation, swimming, and water sports. Families with children, as well as outdoor enthusiasts, will enjoy swimming and time spent in the water. For most people, this is the optimal temperature for a comfortable beach experience. 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 |
|---|---|---|---|
| JUL 16 | 20.6°C | 21.9°C | |
| JUL 17 | 20.7°C | 21.9°C | |
| JUL 18 | 21.2°C | 21.9°C | |
| JUL 19 | 21.1°C | 21.9°C | |
| JUL 20 | 21.0°C | 21.9°C | |
| JUL 21 | 20.4°C | 21.9°C | |
| JUL 22 | 20.3°C | 21.9°C | |
| JUL 23 | 20.2°C | 21.9°C | |
| JUL 24 | 21.9°C | 20.3°C | |
| JUL 25 | 21.9°C | 20.4°C | |
| JUL 26 | 21.9°C | 20.5°C | |
| JUL 27 | 21.9°C | 20.5°C | |
| JUL 28 | 21.9°C | 20.6°C | |
| JUL 29 | 21.9°C | 20.7°C | |
| JUL 30 | 21.9°C | 20.8°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 | 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 | 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 | 4°C | 3°C | 9°C |
Lough Arrow: Water Temperature by Location
Lough Arrow: Weather Forecast
July 24
July 25
July 26
July 27
Location & Local Information
Lough Arrow, located between Counties Sligo and Roscommon in western Ireland, is a peaceful freshwater lake surrounded by low hills and rural countryside. Its water temperature varies with the mild Atlantic climate, averaging around 4–6°C (39–43°F) in winter and reaching 15–18°C (59–64°F) in summer. On especially warm days, sheltered areas along the shore may rise to about 19°C (66°F), though deeper parts remain noticeably cooler. The lake’s open surface and relatively high elevation mean it rarely gets truly warm, so the most pleasant swimming conditions occur between late May and early September when the air is also mild.
Swimming is permitted in Lough Arrow, and the lake is known for its clean, clear water, though swimmers should take care to avoid sudden depth changes and strong breezes that can cause waves. Locals often enjoy short swims or use wetsuits for longer sessions. The lake’s calm beauty makes it a favourite for fishing, kayaking, and birdwatching. Nearby, visitors can explore the ancient Carrowkeel tombs on the hills overlooking the lake or enjoy the cultural life of Sligo town about half an hour away. Altogether, Lough Arrow offers a mix of natural tranquillity, refreshing waters, and quiet outdoor recreation in Ireland’s northwest.