Castle · Caernarfon · Gwynedd

Castell Caernarfon

Castell Caernarfon is a castle in Caernarfon, North Wales. It is on the official list as a scheduled monument. Add Caernarfon, 500 m away, to a visit; it leads 36 places within 15 km.

Photo: Castell Caernarfon, Llywelyn2000 (CC BY-SA 4.0)

Where

In Caernarfon

inside the built-up area

Run by

Cadw

a national heritage body

How well known

Top 1%

#54 of 8,556 places we list

Warmest months

Jun–Sep

highs of 18–20°C

In brief

Castle in Caernarfon

One of the best-known places to visit in England, Scotland, Wales and Northern Ireland

#54 of the 8,556 museums, castles, gardens and other attractions we list, by how widely it is covered (39 Wikipedias). About ↓

Inside Caernarfon

Castell Caernarfon is inside Caernarfon’s built-up area, with 7 more places to visit within 5 km. Towns near it ↓

Cared for by Cadw

One of the places Cadw looks after; members usually get in free. About ↓

Scheduled monument

On the official list of protected heritage; Caernarfon has 250 listed buildings in all, on its History page. About ↓

Written from OpenStreetMap, Wikidata, the ONS built-up areas and Met Office 1991–2020 averages.

When to go

The weather, month by month

The warmest afternoons in Caernarfon run June to September, at 18–20°C.

Jan9° / 3°123 mm

Feb9° / 3°107 mm

Mar10° / 4°98 mm

Apr13° / 6°87 mm

May16° / 8°78 mm

Jun18° / 11°90 mm

Jul20° / 13°112 mm

Aug19° / 13°110 mm

Sep18° / 11°121 mm

Oct14° / 8°155 mm

Nov11° / 6°182 mm

Dec9° / 4°165 mm

Green months are the warmest. Typical afternoon highs and night lows in Caernarfon, and rain in a month. Met Office HadUK-Grid 1991–2020 averages for Caernarfon. Opening times change through the year: check before you go. Caernarfon’s full climate →

About

Castell Caernarfon

Its upkeep is handled by Cadw. Wikipedia covers it in 39 languages.

Caernarfon’s listed buildings and monuments →

Type: Castle
Run by: Cadw
Listed: Scheduled monument
Wikipedias: Covered in 39 languages
Town: in Caernarfon
Official site: cadw.gov.wales/visit/places-to-visit/caernarfon-castle

Facts: Wikidata (CC0) and OpenStreetMap (© OpenStreetMap contributors).

The map

Finding Castell Caernarfon

Use the numbers to match each place near Castell Caernarfon with the list.

Towns near it

Which towns are near Castell Caernarfon

By population, Caernarfon leads the 8 with 9,831. Its own town leads; the rest list it too, closest first.

1 · It’s in town

Caernarfon

9,831 people · 14 places to visit

2 · 2 km east of it

Caeathro

248 people · 8 places to visit

3 · 2.1 km south of it

Bontnewydd

821 people · 11 places to visit

4 · 3.8 km northwest of it

Dwyran

700 people · 12 places to visit

Compare the 8 towns

Town	Where Castell Caernarfon is	People	Places to visit
Caernarfon	It’s in town	9,831	14
Caeathro	2 km east of it	248	8
Bontnewydd	2.1 km south of it	821	11
Dwyran	3.8 km northwest of it	700	12
Brynsiencyn	4.1 km north of it	655	14
Rhostryfan	4.7 km south of it	308	9
Bethel	4.8 km northeast of it	1,091	11
Waunfawr	4.8 km southeast of it	928	8

Make a day of it

What else is near Castell Caernarfon

Choose from 36 places within 15 km, such as 2 forts, 2 castles and 2 museums.

FortCaernarfon500 m away 2

Fort · CadwCaernarfon Town Walls100 m away 3CastleCastle · CadwCastell Dolbadarn11 km away 4

MuseumRoyal Welch Fusiliers Museum100 m away 5

CastleCaer y Belan4.1 km away 6

CathedralBangor Cathedral14 km away 7

AquariumAnglesey Sea Zoo2.7 km away 8

MuseumWelsh Slate Museum11 km away

Within 15 km, close and well known first. Numbers match the map.

Know before you visit Castell Caernarfon

Where is Castell Caernarfon?

Castell Caernarfon is in Caernarfon, Gwynedd, inside the town’s built-up area.

What is Castell Caernarfon?

Castle in Caernarfon, North Wales.

Who runs Castell Caernarfon?

Cadw, so members usually get in free; check opening times before you go.

When is the best time to visit Castell Caernarfon?

June to September are the warmest months in Caernarfon, with afternoon highs of 18–20°C (Met Office 1991–2020 averages).

Is Castell Caernarfon a listed building?

Yes: scheduled monument.

What else is there to see near Castell Caernarfon?

Within 15 km: Caernarfon (500 m), Caernarfon Town Walls (100 m), Castell Dolbadarn (11 km) and Royal Welch Fusiliers Museum (100 m).

Places: OpenStreetMap (© OpenStreetMap contributors, Open Database Licence) and Wikidata (CC0), placed in the ONS 2022 built-up area (Open Government Licence v3.0). Visitor counts are the latest Wikidata gives, with their year.

Photos: each place’s Wikidata image, from Wikimedia Commons under the licence below (our copy, resized).

Photo credits (8)

Castell Caernarfon: Llywelyn2000, CC BY-SA 4.0, Wikimedia Commons
Caernarfon: Nilfanion, CC BY-SA 4.0, Wikimedia Commons
Caernarfon Town Walls: Philip Halling, CC BY-SA 2.0, Wikimedia Commons
Royal Welch Fusiliers Museum: Alan Fryer, CC BY-SA 2.0, Wikimedia Commons
Caer y Belan: Phyllis Flannagan, CC BY-SA 2.0, Wikimedia Commons
Bangor Cathedral: Denis Egan from Bangor, Gwynedd, North Wales, CC BY 2.0, Wikimedia Commons
Anglesey Sea Zoo: Lynne Kirton, CC BY-SA 2.0, Wikimedia Commons
Welsh Slate Museum: Talsarnau Times, CC BY-SA 4.0, Wikimedia Commons

Contains public sector information licensed under the Open Government Licence v3.0. Contains HM Land Registry data © Crown copyright and database right 2026. Contains OS data © Crown copyright and database right 2026 (ONS boundaries). Northern Ireland: Source: NISRA; contains Land & Property Services data and Ordnance Survey of Northern Ireland information, © Crown copyright, licensed under the Open Government Licence v3.0. Scotland: contains National Records of Scotland data, Registers of Scotland data and SEPA data, © Crown copyright / © SEPA 2025, licensed under the Open Government Licence v3.0.