Castle · Carmarthen · Dyfed

Carmarthen Castle

Carmarthen Castle is a grade I listed castle in Carmarthen. Our list has 15 more places within 15 km; first among them is Amgueddfa Sir Gâr - Carmarthenshire Museum, at 3 km. Readers can find it on Wikipedia in 11 languages.

Photo: Carmarthen Castle, Llywelyn2000 (CC BY-SA 3.0)

Where

In Carmarthen

inside the built-up area

How well known

Top 8%

#662 of 8,556 places we list

Warmest months

Jun–Sep

highs of 18–20°C

In brief

Castle in Carmarthen

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

#662 of the 8,556 museums, castles, gardens and other attractions we list, by how widely it is covered (11 Wikipedias). About ↓

Inside Carmarthen

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

Scheduled monument

On the official list of protected heritage; Carmarthen has 304 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

Month by month

Afternoons in Carmarthen peak at 18–20°C, June to September.

Jan8° / 2°139 mm

Feb8° / 2°103 mm

Mar10° / 3°95 mm

Apr13° / 4°99 mm

May16° / 7°107 mm

Jun19° / 10°89 mm

Jul20° / 11°117 mm

Aug20° / 11°107 mm

Sep18° / 9°99 mm

Oct14° / 7°147 mm

Nov11° / 4°152 mm

Dec8° / 2°206 mm

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

About

Carmarthen Castle

Grade I listed castle in Carmarthen, Wales, UK.

In Carmarthen, inside the town’s built-up area.

Carmarthen’s listed buildings and monuments →

Type: Castle
Listed: Scheduled monument
Wikipedias: Covered in 11 languages
Town: in Carmarthen

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

The map

Its place on the map

Carmarthen Castle is in orange, with the places near it numbered as below.

Towns near it

Staying near Carmarthen Castle

The biggest base of the 8 is Carmarthen (16,448 people). Start with its own town; the others follow by distance.

1 · It’s in town

Carmarthen

16,448 people · 6 places to visit

2 · 2.5 km northeast of it

Abergwili

530 people · 5 places to visit

3 · 3.3 km north of it

Bronwydd

293 people · 5 places to visit

4 · 4.1 km northeast of it

Peniel

352 people · 5 places to visit

Compare the 8 towns

Town	Where Carmarthen Castle is	People	Places to visit
Carmarthen	It’s in town	16,448	6
Abergwili	2.5 km northeast of it	530	5
Bronwydd	3.3 km north of it	293	5
Peniel	4.1 km northeast of it	352	5
Ferryside	11 km southwest of it	864	2
Llansteffan	11 km southwest of it	408	4
Bancffosfelen	11 km southeast of it	362	2
Mynyddygarreg	12 km south of it	320	3

Make a day of it

Also near Carmarthen Castle

Nearby, 15 places within 15 km include 4 castles, a museum and a garden.

MuseumAmgueddfa Sir Gâr - Carmarthenshire Museum3 km away · 13K visitors a year 2

Castle · CadwCastell Cydweli13 km away 3

Castle · CadwCastell Llansteffan12 km away 4

Castle · CadwCastell Talacharn14 km away 5

GardenNational Botanic Garden of Wales11 km away 6

Heritage railwayGwili Railway4 km away 7CastleCastle · CadwDryslwyn Castle14 km away 8Art galleryArt galleryOriel Myrddin Gallery300 m away

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

A visit to Carmarthen Castle: questions

Where is Carmarthen Castle?

Carmarthen Castle is in Carmarthen, Dyfed, inside the town’s built-up area.

What is Carmarthen Castle?

Grade I listed castle in Carmarthen, Wales, UK.

When is the best time to visit Carmarthen Castle?

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

Is Carmarthen Castle a listed building?

Yes: scheduled monument.

What else is there to see near Carmarthen Castle?

Within 15 km: Amgueddfa Sir Gâr - Carmarthenshire Museum (3 km), Castell Cydweli (13 km), Castell Llansteffan (12 km) and Castell Talacharn (14 km).

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 (7)

Carmarthen Castle: Llywelyn2000, CC BY-SA 3.0, Wikimedia Commons
Amgueddfa Sir Gâr - Carmarthenshire Museum: Nilfanion, CC BY-SA 4.0, Wikimedia Commons
Castell Cydweli: Iphrit, CC BY-SA 3.0, Wikimedia Commons
Castell Llansteffan: Emperorzurg123, CC BY-SA 4.0, Wikimedia Commons
Castell Talacharn: Garth Newton, CC BY-SA 2.0, Wikimedia Commons
National Botanic Garden of Wales: Col Ford and Natasha de Vere, CC BY 2.0, Wikimedia Commons
Gwili Railway: Gareth James, CC BY-SA 2.0, 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.