Under Salt Marsh is filmed across several real Welsh coastal locations, mainly in North Wales.

Main filming locations

  • Barmouth, Gwynedd – A large portion of the series was shot here, with the town standing in for the fictional Morfa Halen, including its seafront, promenade and beach views.
  • Fairbourne, Gwynedd – Used heavily for salt marsh and village scenes; streets like Llewelyn Drive and the seafront car park feature as key backdrops for investigations and sea wall shots.
  • Newborough Forest, Anglesey (Niwbwrch) – A 2,000‑acre coastal forest with dunes and marshland that provides much of the wild coastline and marsh scenery.
  • Mawddach Estuary area – Estuary and surrounding landscapes help create the dramatic coastal atmosphere around the town.
  • Menai Bridge & Gazelle Inn (Anglesey side) – Used for additional coastal and waterside scenes.

So, if you’re wondering where is Under Salt Marsh filmed , the answer is that Morfa Halen is fictional, but it’s brought to life using real locations around Barmouth, Fairbourne, Anglesey’s Newborough Forest, and the Mawddach Estuary in Wales.

HTML table of key locations

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Real location Region How it’s used in Under Salt Marsh
Barmouth Gwynedd, North Wales Primary stand‑in for Morfa Halen’s townscape, seafront and promenade scenes.
Fairbourne Gwynedd, near Snowdonia Village and salt marsh areas, seafront car park and streets used for crime and storm scenes.
Newborough Forest (Niwbwrch) Anglesey Coastal forest, dunes and marshland doubling as wild coastline around Morfa Halen.
Mawddach Estuary North Wales Estuary landscapes for atmospheric coastal and marsh shots.
Menai Bridge & Gazelle Inn Anglesey / Gwynedd strait Additional waterfront and bridge visuals used throughout the series.

Information gathered from public forums or data available on the internet and portrayed here.