Mountain

Cefn Mawr

Located in Derwen, Denbighshire Coordinates: 53°02′34″ N 3°24′15″ W

Location in United Kingdom

Elevation: 354 m; above sea level
Nearest town: Derwen; 1.1 km S
Local time: UTC+00:00; Europe/London · UTC+00:00
When to go: June–August; See the climate
Airports: LPL Liverpool John Lennon Airport49 km; MAN Manchester Airport83 km

About Cefn Mawr

Cefn Mawr is a mountain. Location: Derwen, Denbighshire. Elevation: 354 m. The best months to visit are June–August. The nearest airport is Liverpool John Lennon Airport (49 km). Nearby sights include Boncyn Foel-bach and Garth y Wig.

Climate of Cefn Mawr

Best months for sightseeing

Best months for sightseeing: June–August.

This month · November

A wet month

Day 8° · Night 2° · Rain 125 mm

Hottest month: July (day 18°)
Coldest month: February (night 0°)
Wettest month: November (125 mm)
Driest month: May (68 mm)

6° 0°

5° 0°

7° 1°

10° 2°

13° 5°

16° 7°

18° 10°

18° 9°

15° 7°

12° 5°

8° 2°

6° 1°

Jan

110

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

108

Nov

125

Dec

119

Bars: average monthly low and high temperature. Below: precipitation. Monthly averages for 1970–2000 at about 18 km resolution, adjusted for elevation. Highlighted months are mild and relatively dry. Source: WorldClim 2.1 (CC BY 4.0).

Show values as a table

Climate of Cefn Mawr
Month	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Average high (°C)	6°	5°	7°	10°	13°	16°	18°	18°	15°	12°	8°	6°
Average low (°C)	0°	0°	1°	2°	5°	7°	10°	9°	7°	5°	2°	1°
Precipitation (mm)	110	82	96	72	68	77	70	89	98	108	125	119

Other places to visit in this season: June July August

How to get to Cefn Mawr

The nearest airport is Liverpool John Lennon Airport (LPL), 49 km to the northeast as the crow flies. The nearest large city is Birkenhead, 47 km to the northeast.

Airports

Liverpool John Lennon Airport (LPL) Liverpool 49 kmnortheast
Manchester Airport (MAN) Manchester, Greater Manchester 83 kmnortheast
Birmingham Airport (BHX) Birmingham, West Midlands 130 kmsoutheast

Nearby large cities

Birkenhead Population: 325.3K 47 kmnortheast
Liverpool Population: 496.8K 50 kmnortheast
St Helens Population: 183.2K 64 kmnortheast
Warrington Population: 172.3K 67 kmnortheast
Wigan Population: 175.4K 76 kmnortheast

Straight-line distances; road distances are longer. Airport data: OurAirports.

Day trips from Cefn Mawr

Within 100 km: 687 historic and cultural sites, 2,079 natural sites, 195 lakes, rivers and coasts.

0–25 km301 places

Ynys Goediog Island 24 kmSW
Llyn Brân Lake 13 kmNW
Bala Lake Lake 24 kmSW
Alwen Reservoir Lake 13 kmW

25–60 km1,199 places

Thurstaston Beach Beach 37 kmNE
Ynys Tywyn Island 50 kmW
Puffin Island Island 52 kmNW
Hilbre Island Island 40 kmN

60–100 km1,461 places

Anglesey Island 68 kmNW
Whistling Sands Beach 92 kmW
Traeth Penllech Beach 87 kmW
Porth Towyn Beach Beach 84 kmW

Straight-line distances.

Nearest towns and villages

Derwen Village, Derwen
1.1 km S
Bryn Saith Marchog Village, Gwyddelwern
1.7 km E
Clawdd-newydd Village, Derwen
3.1 km NE
Melin-y-Wig Village, Betws Gwerfil Goch
2.6 km SW
Gwyddelwern Municipality, Denbighshire
3 km SE
Clocaenog Municipality, Denbighshire
3.3 km N

Cefn Mawr

Nearby attractions & nature

Everything nearby

Boncyn Foel-bach Mountain, Derwen
1.8 km N
Garth y Wig Mountain, Betws Gwerfil Goch
2.3 km SW
Moel Ty-newydd Mountain, Gwyddelwern
2.4 km SE
Mynydd Rhyd Ddu Mountain, Betws Gwerfil Goch
2.7 km S
Moel Clegyr Mountain, Betws Gwerfil Goch
2.7 km SW
Mynydd Llanelidan Mountain, Gwyddelwern
3.4 km SE
Pen Hafoty-foel Mountain, Betws Gwerfil Goch
3.9 km SW
Cefn Du Mountain, Clocaenog
4.1 km N

Cefn Mawr

Sources & licences

GeoNames, CC-BY-4.0 GeoNames (www.geonames.org), CC BY 4.0

Data last updated: November 3, 2026