Seymour Tower
A 1782 defensive tower on a rock two kilometres offshore, walked to at low tide.
Updated 21 October 2026
Seymour Tower stands on a rock about two kilometres off Jersey's southeastern corner, a square granite tower built in 1782 against French landings, and it can only be reached on foot across the reef at low tide with a guide, because the water comes back fast across a very large area of flat ground. The tower can be stayed in overnight, which means being cut off by the sea for hours on either side.
History
The tower was one of 30 coastal towers ordered by Field Marshal Henry Seymour Conway after the Battle of Jersey of 6 January 1781, of which only 23 were built, and it is the only square one; construction began in 1782. The States of Jersey bought it in 1923 for £120, and Jersey Heritage acquired it in 2006 (Wikipedia, Seymour Tower).
What to look for
- The tower - the square granite building of 1782 on its offshore rock.
- The reef walk - the guided crossing over the exposed seabed at low tide.
- The tidal range - one of the largest in the world, uncovering a vast area.
- The overnight stay - the option of being cut off in the tower by the tide.
When to go
April to September is the main season for guided walks. Crossings run to the tide, not a timetable. Winter walks are occasional.
Practical notes
Going without a guide is genuinely dangerous. Crossings depend on the tide and cancel in poor visibility. The tower has no electricity or running water.
Nearby
La Rocque is on the shore, and Gorey is north.
Key facts
Source: Wikidata, item Q12832699, read on 18 October 2026.
What to pack for Seymour Tower
Chosen from what this place is for. Tap a kit for the full checklist.
- Comfortable walking shoes - Sightseeing means kilometres of pavement and cobbles daily. Find on Amazon
- Shelter suited to the place - Tent, tarp or hut booking - match it to the terrain and rules. Find on Amazon
- A slim anti-theft daypack - Zips that close properly; keep it in front in crowds and on transit. Find on Amazon
- A warm sleeping bag + mat - Rated a little colder than you expect the nights to be. Find on Amazon
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Opening times, ticket prices and seasonal closures change - check the official source before you go: official site.



