Updated
Editor's Notes
Lough Derg, historically Lough Dergart (Irish: Loch Deirgeirt), is a freshwater lake in the Shannon River Basin, Ireland. It is the third-biggest on the island of Ireland (after Lough Neagh and Lough Corrib) and the second largest lake in the Republic of Ireland.
It is a long, narrow lake, with shores in counties Clare (south-west), Galway (north-west), and Tipperary (to the east).
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Weather at Lough Derg
46°F, Light rain · H 52° / L 43° · 81% chance of rain3-day forecast
H: 52° L: 43°
Light rain
46°
|
Feels like 42°
Precipitation
81%
Humidity
88%
Wind
7 mph
UV Index
0
Weather notes:
🌧️Rain expected
12 AM
46°
3 AM
45°
6 AM
47°
9 AM
46°
12 PM
51°
3 PM
52°
6 PM
48°
9 PM
44°
Frequently asked questions
- Where is Lough Derg?
- Lough Derg is a lake in Connacht.
- Can you swim at Lough Derg?
- There is no fixed answer for Lough Derg: whether it is safe to swim there on a given day depends on the water temperature, recent rainfall, and any advisories posted at Lough Derg in Connacht. Check current water conditions before you go, and follow posted signs and local guidance.
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Location & Contact
Connacht
🏞️ Best times & visiting tips
- ›Check for boat launch facilities and fees
- ›Obtain required fishing licenses before arrival
- ›Be aware of lake-specific regulations and restrictions
- ›Monitor water quality reports before swimming
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