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Attraction · near Merthyr Tydfil · Mid Glamorgan

Pontsarn Viaduct

Head 1 km north of Merthyr Tydfil for Pontsarn Viaduct, an attraction. Add Morlais Castle, 500 m away, to a visit; it leads 15 places within 15 km.

Where
1 km
north of Merthyr Tydfil
Warmest months
Jun–Aug
highs of 17–19°C
In brief

Attraction near Merthyr Tydfil

Just outside Merthyr Tydfil

Pontsarn Viaduct is 1 km north of Merthyr Tydfil. Towns near it ↓

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

When to go

Month by month

In Merthyr Tydfil the warm season is June to August, with highs of 17–19°C.

Jan7° / 1°183 mm
Feb6° / 1°154 mm
Mar8° / 2°127 mm
Apr12° / 4°102 mm
May15° / 6°98 mm
Jun17° / 9°96 mm
Jul19° / 11°106 mm
Aug19° / 11°127 mm
Sep16° / 9°126 mm
Oct12° / 6°193 mm
Nov9° / 4°192 mm
Dec7° / 2°218 mm
Green months are the warmest. Typical afternoon highs and night lows in Merthyr Tydfil, and rain in a month. Met Office HadUK-Grid 1991–2020 averages for Merthyr Tydfil. Opening times change through the year: check before you go. Merthyr Tydfil’s full climate →
About

Pontsarn Viaduct

Attraction.

Type
Attraction
Town
1 km north of Merthyr Tydfil
Facts: Wikidata (CC0) and OpenStreetMap (© OpenStreetMap contributors).
The map

Finding Pontsarn Viaduct

Numbered points are the places near Pontsarn Viaduct, which is in orange.

12345678

© OpenStreetMap contributors · ONS built-up area 2022

Towns near it

Towns within reach of Pontsarn Viaduct

The towns are in order of distance, its own town first.

1 · 1 km south of it

Merthyr Tydfil

39,542 people · 5 places to visit

Make a day of it

Nearby, too

Around it, within 15 km, lie 15 more, including 4 museums, 2 castles and a heritage railway.

1CastleMorlais Castle500 m away2Heritage railwayHeritage railwayBrecon Mountain Railway3.5 km away3CastleLlancaiach-fawr15 km away4MuseumMuseumCyfarthfa Castle Museum & Art Gallery2.6 km away5MuseumMuseumCynon Valley Museum & Gallery8.2 km away6AttractionAttractionPenderyn Distillery9.5 km away7MuseumMuseumTredegar Museum9.7 km away8MuseumMuseumTredegar Medical Aid Society Heritage Centre9.7 km away

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

Planning a visit to Pontsarn Viaduct

Where is Pontsarn Viaduct?

Pontsarn Viaduct is 1 km north of Merthyr Tydfil, Mid Glamorgan.

What is Pontsarn Viaduct?

Attraction.

When is the best time to visit Pontsarn Viaduct?

June to August are the warmest months in Merthyr Tydfil, with afternoon highs of 17–19°C (Met Office 1991–2020 averages).

What else is there to see near Pontsarn Viaduct?

Within 15 km: Morlais Castle (500 m), Brecon Mountain Railway (3.5 km), Llancaiach-fawr (15 km) and Cyfarthfa Castle Museum & Art Gallery (2.6 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 (2)

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.