Weather & Climate in Ballycastle, United Kingdom
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Ballycastle experiences four distinct seasons with an average annual temperature of 48°F (9°C). Winters average 41°F in January while summers reach 58°F in July / relatively mild seasonal variation. Annual precipitation totals 45.1 inches. The city sits at an elevation of 36 feet.
Temperature
41°F Jan (5°C)
58°F Jul (14°C)
| Annual Average | 48.4°F |
| 10% below US avg | |
| January Average | 41°F (5°C) |
| July Average | 58°F (14°C) |
Geography
| Elevation | 36 ft (11 m) |
| Area | 1,043.6 sq mi (2,702.8 km²) |
| Population Density | 5/sq mi |
| Coordinates | 55.2044°N, 6.2430°W |
| Timezone | Europe/London |
Precipitation & Snow
Air Quality
Earthquake History
5 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M3.5.
| May 3, 1998 | Scotland, United Kingdom | M3.5 | 96 km | 15 km |
| Jan 26, 1990 | 34 km N of Isle of Islay, United Kingdom | M3.0 | 99 km | 10 km |
| Aug 27, 1992 | 33 km NNE of Isle of Islay, United Kingdom | M2.7 | 96 km | 10 km |
| Mar 7, 1998 | 13 km E of Oban, United Kingdom | M2.7 | 148 km | 9 km |
| Nov 1, 2017 | 2 km NNW of Tarbert, United Kingdom | M2.6 | 91 km | 7 km |
Source: USGS Earthquake Catalog (M2.5+, 1990-2025). Sorted by magnitude.
Tsunami History
1 tsunami recorded within 500 km.
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 720 | HEBRIDES (SCOTLAND) | Questionable Earthquake | - | - | 126 km |
Source: NOAA/NCEI Historical Tsunami Database.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 41°F (5°C) | 5.2 in | Wettest |
| February | 41°F (5°C) | 3.6 in | Coldest |
| March | 43°F (6°C) | 3.9 in | |
| April | 46°F (8°C) | 2.6 in | |
| May | 50°F (10°C) | 2.2 in | Driest |
| June | 54°F (12°C) | 2.4 in | |
| July | 58°F (14°C) | 2.9 in | Warmest |
| August | 58°F (14°C) | 3.4 in | |
| September | 55°F (13°C) | 4.1 in | |
| October | 50°F (10°C) | 4.9 in | |
| November | 45°F (7°C) | 5.0 in | |
| December | 42°F (6°C) | 4.8 in |
Ballycastle has a seasonal temperature swing of 17°F / from 41°F in February to 58°F in July. Total annual precipitation is 45.1 inches, with January being the wettest month (5.2") and May the driest (2.2").