On the Sea
Synopsis
In a rural town in North Wales, mussel harvester Jack has been married to his wife Maggie for over half of his life. He is troubled by his son Tom, who has little interest in the family trade. When Jack crosses paths with Daniel, an itinerant deckhand, their attraction poses an impossible dilemma.
Trailers, Teasers & Extra Featurettes
Official promotional previews, behind-the-scenes footage, and exclusive clips.
On The Sea UK trailerOfficial
Type: Trailer • Published 2026-06-22
Top Cast
Explore Star Directory →
Barry Ward
Jack
Lorne MacFadyen
Daniel
Liz White
Maggie
Henry Lawfull
Tom
Celyn Jones
Dyfan
Leisa Gwenllian
Lois
Danny Webb
Bernie
Callum Hymers
Rhys
Sheldon Jones
Billy
Tristan Jones
Ioan
Kieran Roberts
Finn
Lisa Jên Brown
Iris
Robert Gwyn Davin
Doctor Hughes
Julian Lewis Jones
William
William Huw
Hugh
Owen Arwyn
Alyn
Aaron Leacock
Celyn
Chukwudalu Molokwu
Vinnie
Release History & Theatrical Window
Mardi Gras Film Festival
Festival / Special Debut
Key Information & Fast Facts
- Director
- Helen Walsh
- Screenplay & Story
- Helen Walsh
- Original Score
- Felix Rösch
- Original Title
- On the Sea
- Country of Origin
- United Kingdom
- Spoken Languages
- English
- Runtime
- 1h 55m
- Production Studios
- Red Union Films
Creative Leadership & Key Crew
Helen Walsh
Helen Walsh
Felix Rösch
Sam Goldie
Ricardo Saraiva
Department Leadership Roster
Helen Walsh
Director
Helen Walsh
Writer
Ricardo Saraiva
Editor
Sam Goldie
Director of Photography
Felix Rösch
Original Music Composer
Age Classification & Content Advisories
Official viewer rating standards and content warnings across international classification boards.
International Certification Matrix
Suitable only for adults 18 years and over.
Production Stills & Gallery
Official cinematic photography and background stills for On the Sea.
Featured In Curated Collections
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Best Popular Movies
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Frequently Asked Questions About On the Sea
Quick factual answers about cast, synopsis, director, box office, and release information.
What is On the Sea about?
In a rural town in North Wales, mussel harvester Jack has been married to his wife Maggie for over half of his life. He is troubled by his son Tom, who has little interest in the family trade. When Jack crosses paths with Daniel, an itinerant deckhand, their attraction poses an impossible dilemma.
Who directed On the Sea?
On the Sea was directed by Helen Walsh.
Who stars in On the Sea?
The principal cast of On the Sea includes Barry Ward, Lorne MacFadyen, Liz White, Henry Lawfull, Celyn Jones.
When was On the Sea released and how long is it?
On the Sea was released in 2025 with a total runtime of 1h 55m.
Who composed the musical score for On the Sea?
The original motion picture soundtrack for On the Sea was composed by Felix Rösch.
What is the age rating and content advisory for On the Sea?
On the Sea holds official age classifications: GB: 18 (Suitable only for adults 18 years and over.).