Updated
Editor's Notes
Lough Derg or Loch Derg (Irish: Loch Dearg) is a lake in County Donegal, Republic of Ireland. It is near the border with Northern Ireland and lies about 7 kilometres (4.3 mi) north of the border village of Pettigo. It is best known for St Patrick's Purgatory, a site of pilgrimage on Station Island in the lake.
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Weather at Lough Derg
40°F, Patchy rain nearby · H 51° / L 36° · 71% chance of rain3-day forecast
H: 51° L: 36°
Patchy rain nearby
40°
|
Feels like 37°
Precipitation
71%
Humidity
94%
Wind
4 mph
UV Index
0
Weather notes:
🌧️Rain expected
12 AM
36°
3 AM
36°
6 AM
36°
9 AM
37°
12 PM
49°
3 PM
51°
6 PM
42°
9 PM
42°
Frequently asked questions
- Where is Lough Derg?
- Lough Derg is a lake in Northern Ireland.
- 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 Northern Ireland. Check current water conditions before you go, and follow posted signs and local guidance.
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Location & Contact
Northern Ireland
🏞️ 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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