Castlewellan, United Kingdom
Northern Ireland · United Kingdom
Castlewellan is a small town in Northern Ireland, United Kingdom with a population of 2,499. Elevation: 371 ft (113 m). Average temperature: 47°F (8°C).
Population source: Wikidata (dated census and official estimates), GeoNames. Climate: WorldClim 2.1 normals (1970-2000), NASA POWER. Updated August 2026
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About Castlewellan
Castlewellan is a small town in County Down, in the south-east of Northern Ireland close to the Irish Sea. It is beside Castlewellan Lake and Slievenaslat mountain, 11 miles (18 km) southwest of Downpatrick. It lies between the Mourne Mountains and Slieve Croob. It had a population of 2,822 people in the 2021 census.
People
Climate
| Population | 2,499 |
| Population Density | 3 / sq mi |
| Elevation | 371 ft (113 m) |
| Coordinates | 54.2569°, -5.9445° |
| Timezone | Europe/London |
| Country | 🇬🇧 United Kingdom |
| State / Province | Northern Ireland |
| Average Temperature | 47°F (8°C) |
| January Average | 37°F (3°C) |
| July Average | 59°F (15°C) |
| Annual Precipitation | 46.4 inches (1,178 mm) |
| Annual Snowfall | 0.0 inches (0 cm) |
About Castlewellan
Castlewellan is a small town in United Kingdom (Northern Ireland) with a population of 2,499. The city sits at an elevation of 371 feet (113 meters) above sea level. The average annual temperature is 47°F (8°C). Temperatures range from 37°F in January to 59°F in July. Annual precipitation averages 46.4 inches. The timezone is Europe/London.
Temperature
| Annual Average | 47.2°F |
| 13% below United Kingdom avg | |
| January Average | 37°F (3°C) |
| July Average | 59°F (15°C) |
Geography
| Elevation | 371 ft (113 m) |
| Area | 992.2 sq mi (2,569.7 km²) |
| Population Density | 3/sq mi |
| Coordinates | 54.2569°N, 5.9445°W |
| Timezone | Europe/London |
Precipitation & Snow
Air Quality
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 37°F (3°C) | 4.9 in | Coldest, Wettest |
| February | 38°F (4°C) | 3.5 in | |
| March | 42°F (5°C) | 4.1 in | |
| April | 45°F (7°C) | 3.1 in | |
| May | 51°F (10°C) | 2.8 in | Driest |
| June | 55°F (13°C) | 3.0 in | |
| July | 59°F (15°C) | 3.0 in | Warmest |
| August | 58°F (14°C) | 3.9 in | |
| September | 54°F (12°C) | 4.1 in | |
| October | 48°F (9°C) | 4.7 in | |
| November | 41°F (5°C) | 4.5 in | |
| December | 38°F (4°C) | 4.7 in |
Castlewellan has a seasonal temperature swing of 22°F / from 37°F in January to 59°F in July. Total annual precipitation is 46.4 inches, with January being the wettest month (4.9") and May the driest (2.8").
Schools in Castlewellan
9 public schools (OpenStreetMap data).
| School | Level | Enrollment | Teachers | Student/Teacher |
|---|---|---|---|---|
| St Malachy's Primary School | - | - | - | - |
| St Matthew's Primary School Magheramayo | - | - | - | - |
| Bunscoil Bheanna Boirche | - | - | - | - |
| Knockevin Special School, Castlewellan | - | - | - | - |
| St Patrick's Primary School | - | - | - | - |
| Annsborough Integrated Primary School | - | - | - | - |
| St Francis' Primary School | - | - | - | - |
| Saint Malachy's High School | - | - | - | - |
| St Malachy's Primary School | - | - | - | - |
Radio Stations near Castlewellan
5 stations within ~55 km.
| Station | Genre | Quality | |
|---|---|---|---|
| Q Radio Belfast | - | MP3 128 kbps | |
| LMFM Country (IE) | - | AAC 127 kbps | |
| Raidió Fáilte | indie, rock | MP3 128 kbps | |
| Mdog Radio | - | MP3 320 kbps | |
| Raidió Fáilte 107.1fm | belfast, irish traditional | MP3 128 kbps |
Museums in Castlewellan
| Name | Type | Address | Phone | Annual Revenue |
|---|---|---|---|---|
| Carriage Gallery | ||||
| Down County Museum | ||||
| Greenore Railway Museum | ||||
| St. Patricks Visitor Centre |
Libraries in Castlewellan
| Name | Address | Staff | Annual Visits | Circulation | Collection | Programs |
|---|---|---|---|---|---|---|
| Ballynahinch Library | 0.0 | |||||
| Castlewellan Library | 0.0 | |||||
| Downpatrick Library | 0.0 | |||||
| Dromore Library | 0.0 | |||||
| Kilkeel Library | 0.0 | |||||
| Newcastle Library | 0.0 | |||||
| Saintfield Library | 0.0 | |||||
| The Bronte Library Rathfriland | 0.0 |
Hotels in Castlewellan
1 hotels within city radius - OpenStreetMap data
Cafes in Castlewellan
3 cafes within city radius - OpenStreetMap data
Monuments in Castlewellan
1 monuments within city radius - OpenStreetMap data
Castles in Castlewellan
4 castles within city radius - OpenStreetMap data
Veterinaries in Castlewellan
1 veterinaries within city radius - OpenStreetMap data
Gas Stations in Castlewellan
3 gas stations within city radius - OpenStreetMap data
Banks in Castlewellan
2 banks within city radius - OpenStreetMap data
Gyms in Castlewellan
1 gyms within city radius - OpenStreetMap data
Breweries in Castlewellan
| Name | Type | Address | Phone | Website |
|---|---|---|---|---|
| Beer Hut Brewing | ||||
| Farmageddon Brewing Company | ||||
| Whitewater Brewing Co. |
Airports Near Castlewellan
27 airports within the area.
| Airport | IATA | Type |
|---|---|---|
| Belfast International Airport | BFS | Large Airport |
| George Best Belfast City Airport | BHD | Medium Airport |
| Aughrim Airstrip | - | Small Airport |
| Ballyhavil Farm Airfield | - | Small Airport |
| Carstown Ultralight Airstrip | - | Small Airport |
| Coalisland Airstrip | - | Small Airport |
| Crossmaglen Airstrip | - | Small Airport |
| Derryogue | - | Small Airport |
| Dunnyvadden Airstrip | - | Small Airport |
| Dunslaughlin Airstrip | - | Small Airport |
| Ellistown Airstrip | - | Small Airport |
| Laytown Airstrip | - | Small Airport |
| Mayobridge Airstrip | - | Small Airport |
| Mullaglass | - | Small Airport |
| Navan Airfield | - | Small Airport |
| Newry private Airstrip | - | Small Airport |
| Newtownards Airport | - | Small Airport |
| Rathfriland Airstrip | - | Small Airport |
| Redrock Airstrip | - | Small Airport |
| Slemish Airfield | - | Small Airport |
| Slieve Croob Airfield | - | Small Airport |
| Tandragee Airstrip | - | Small Airport |
| Tarsan Lane Microlights | - | Small Airport |
| The Moy Airstrip | - | Small Airport |
| Tobertaskin Airstrip | - | Small Airport |
| Wild Geese Skydive Centre | - | Small Airport |
| Woodview Airfield | - | Small Airport |
Post Offices in Castlewellan
3 post offices.
| Post Office | Address |
|---|---|
| Annsborough Post Office | |
| Castlewellan Post Office | |
| Kilcoo Post Office |
Churches & Religious Organizations in Castlewellan
15 religious organizations (IRS tax-exempt data).
| Name | Address |
|---|---|
| Ballywillwill Gospel Hall | |
| Church of the Immaculate Conception | |
| Dab | |
| Derryneil Baptist Church | |
| Drumgooland Parish Church | |
| Drumlee Presbyterian Church | |
| Leitrim Presbyterian Church | |
| Presbyterian Church | |
| Saint Malachy's | |
| Saint Marys - Church of the Immaculate Conception | |
| Saint Pauls | |
| St Francis Chapel | |
| St Malachy's | |
| St Mary of the Angels RC Church | |
| St Patrick's Church |
Quick Facts
🇬🇧 About United Kingdom
Public Holidays in United Kingdom
14 public holidays this year
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Get ReportFrequently Asked Questions About Castlewellan
What is the population of Castlewellan?
Castlewellan has a population of 2,499 residents and is located in United Kingdom. The population density is 3 people per square mile, spread across 992.2 square miles.
What is the weather like in Castlewellan?
Castlewellan has a four-season climate with an average annual temperature of 47°F (8°C). Winter temperatures average 37°F in January, while summers reach an average of 59°F in July. Annual rainfall totals 46.4 inches.
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