Seymour Tower — Jersey
Explore5.0· 2

Walk on the seabed to an offshore fort

TidesWalksPhotogenicHistory

Seymour Tower

Off La Rocque, Grouville 3–4 hours (guided) Verified 2026-06

Perched two kilometres offshore, Seymour Tower emerges from Jersey’s vast intertidal zone. Accessible only by foot at low water, this historic 18th-century structure offers an immersive experience into the island's unique coastal landscape and defensive past.

Official website Build an itinerary

The story

Seymour Tower, completed in 1782, stands as a solitary sentinel on Jersey’s south-east coast. Part of a chain of coastal defences against French invasion, this granite tower was designed to guard the island's vulnerable eastern approaches. Its isolated position offshore speaks to a time when naval threats were constant. Reaching it involves traversing a remarkable marine environment, a landscape typically hidden beneath the waves. The tower itself is a testament to resilient engineering, having withstood centuries of exposure to the elements and the relentless ebb and flow of the English Channel’s powerful tides. It offers a tangible connection to Jersey's strategic military history and its enduring relationship with the sea.

What to expect

A guided walk to Seymour Tower allows you to experience the vastness of Jersey's intertidal plain. You’ll navigate across a landscape unveiled by the retreating tide, discovering oyster beds, intricate gullies, and small rockpools teeming with marine life. Upon reaching the tower, you can explore its historic interior, gaining insight into its defensive purpose and the lives of those stationed there. For the truly adventurous, the possibility of an overnight stay offers a profound connection to this isolated marine fort, watching as the sea reclaims its dominance around the tower.

Highlights

  • Explore an 18th-century offshore defence tower
  • Walk across a vast intertidal landscape
  • Discover rich marine biodiversity
  • Experience extreme tidal movements firsthand
  • Capture dramatic coastal photography
  • Opportunity for a unique overnight stay

Where you'll find it

Located off La Rocque in Grouville, Seymour Tower is found approximately two kilometres from Jersey's shore. It's best reached via guided walks departing from the coastal road near La Rocque harbour. The surrounding area offers views towards the Minquiers reef on clear days and is a rich environment for birdwatching and coastal walks along the nearby beaches at high tide.

Insider tip

Always join a guided walk; the tides here recede and return with remarkable speed, posing a significant safety risk to unguided visitors.

Best time to visit

Low tide is the only time to access Seymour Tower on foot, with guided walks typically scheduled around spring tides for maximum exploration time.

Good to know

Never attempt the crossing unguided — the tide here comes in faster than walking pace.

G

Google reviews & map

Open in Google Maps
5.0
2 Google reviews

Jersey

Data via Google Places · refreshed live

Nearby & similar

See all
Une remarque sur l'exactitude des informations. Ce guide est conçu pour vous aider à préparer votre voyage. Les horaires d'ouverture, les tarifs, les règles d'entrée, les transports et les informations de marée peuvent changer. Vérifiez toujours les sources officielles avant de partir ou de réserver.