Under Salt Marsh is Sky TV’s crime thriller series created and directed by Claire Oakley, with help from Mary Nighy. The story is written by Claire Oakley, Jonathan Harbottle, and Nikita Lalwani. It stars Kelly Reilly, Rafe Spall, Jonathan Pryce, Naomi Yang, and Harry Lawtey.
Here’s everything you need to know about where Under Salt Marsh was filmed and what makes its locations so special.
The story takes place in a small seaside town in Wales called Morfa Halen. A teacher named Jackie Ellis (played by Kelly Reilly) finds her young student dead. The mystery reminds her of another case from years ago — the disappearance of her niece. Jackie and her old friend, Detective Eric Bull (Rafe Spall), start digging for answers while a big storm heads their way.
The series will release on Sky TV and NOW in 2026. It will be available on Sky and NOW in the UK and Ireland.
Table of Contents
When and Where Was Under Salt Marsh Filmed?
| Film Name | Under Salt Marsh |
|---|---|
| Genres | Crime, Mystery, Thriller |
| Filming Locations | Wales (Barmouth, Fairbourne & others) |
| Filming Dates | October 2024 |
| Production Managed by | Rhun Llewelyn |
| Release Date | 2026 |
Filming for Under Salt Marsh started in October 2024 and took place completely in Wales. The crew filmed across beautiful coastal towns such as Barmouth and Fairbourne, which were perfect for the show’s seaside look.
📍Barmouth, North Wales
Barmouth is one of the main filming spots for Under Salt Marsh. Many outdoor scenes, including those showing the sea and the town, were filmed here. The town’s beach, hills, and ocean views helped create the look of the fictional town, Morfa Halen. Its natural beauty and stormy atmosphere made it a perfect choice for this mystery story.
Barmouth, nestled on the stunning coastline of North Wales, is a beloved seaside town where the mountains of Snowdonia meet the Irish Sea. It’s famous for its sandy beach and the iconic Barmouth Bridge, a long railway viaduct spanning the Mawddach Estuary. This picturesque location offers a mix of Victorian charm and natural beauty, making it a perfect spot for coastal walks and outdoor adventures.
📍Fairbourne, North Wales
Fairbourne and its marsh areas were used to show the salty, muddy wetlands seen in the series. These areas gave the show its dark and mysterious look. The sea and marsh scenes in Under Salt Marsh were likely filmed here to match the story’s theme of secrets buried in a quiet coastal town.
Fairbourne is a small coastal village in Gwynedd, framed by the long sandy beach of Barmouth Bay and the dramatic backdrop of Snowdonia National Park. It is known for the scenic, narrow-gauge Fairbourne Railway, which runs to Penrhyn Point where a ferry connects to Barmouth. However, the low-lying community is uniquely identified as one of the UK’s first communities facing “managed retreat” due to the long-term threat of rising sea levels.
📍Other Areas in Wales
Apart from Barmouth and Fairbourne, the team also filmed in other Welsh towns and countryside spots. The green hills, long beaches, and small villages across Wales helped bring Under Salt Marsh to life. These locations made the show feel real and added to its strong seaside mood.
Under Salt Marsh Behind the Scenes
The series was made with full support from Creative Wales, which helped the team use local talent and film in real Welsh places. Director Claire Oakley wanted to show the beauty and mystery of the Welsh coast, and the show’s filming locations capture that perfectly.
Cast members and crew have shared some behind-the-scenes moments on their social media, including Instagram.
Is There Any Trailer Available for Under Salt Marsh?
Yes, Sky TV has released a short trailer for Under Salt Marsh. You can watch it on Sky’s official YouTube channel or on their website.
The six-episode British series is set to premiere in 2026 by Sky TV and NOW.
FAQs
Q1: Where was Under Salt Marsh filmed?
A1: The series was filmed completely in Wales, mainly in Barmouth and Fairbourne, with extra scenes in other nearby areas.
Q2: What scenes were filmed at Fairbourne?
A2: The coastal and marsh scenes were filmed at Fairbourne to show the quiet, foggy seaside mood of the story.
Q3: When did the filming for Under Salt Marsh begin?
A3: Filming began in October 2024.
Q4: Can I visit the filming locations of Under Salt Marsh?
A4: Yes! Both Barmouth and Fairbourne are real towns in Wales and are open for visitors. They are popular seaside destinations, great for fans who want to explore where the series was filmed.
The show beautifully captures the wild and dramatic seaside of Wales, making it the perfect setting for this thrilling mystery.
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