Reefwander
A diver's fins beside a black sea fan and barrel sponges on a coral wall near Soufrière, St. Lucia.

St. Lucia · St. Lucia · Reef

Rosemond's Trench

Finger coral with valleys, a tunnel and a chimney

Area photo: WRI Staff · CC BY 2.0

A shallow site on St. Lucia's leeward coast, built on coral shaped like the fingers of a small hand with valleys and trenches running between them. Maximum depth is around 11 m, and a small tunnel leading into a chimney gives the dive its one piece of overhead. Seahorses, frogfish and turtles are all on the list here.

Where it is and how deep

Depth profile of Rosemond's Trench: typical dive to 11 m (to 36 ft) 18 m · Open Water30 m · Advanced40 m · Recreational limit11 mtypical dive
Depths on a shared scale to 40 m (130 ft); dashed lines mark common certification limits.

13.9273° N, 61.0590° WApproximate position — the dashed circle shows where the site lies; your operator's briefing has the mooring.

The dive

The ground here is coral shaped like the fingers of a small hand, with valleys and trenches running between the ridges. The dive follows those channels rather than a single contour: you drop into one, work along it, cross a ridge and pick up the next. Maximum depth is around 36 ft / 11 m, so the whole thing sits in bright water and the tank lasts.

The one structural feature is a small tunnel that leads into a chimney. It is short and shallow, but it is still an overhead, so it is taken one diver at a time with fins kept off the coral either side. Around it the site is a critter dive: seahorses, frogfish, turtles and many species of tropical fish are all recorded here, which is what the shallow depth and the long bottom time are for.

Marine life and season

  • Frogfish
  • Sea turtles
  • Macro critters
Month-by-month season rating for Rosemond's Trench
JanFebMarAprMayJunJulAugSepOctNovDec
PrimePrimePrimePrimeGoodGoodFairFairFairFairFairPrime

Season follows St. Lucia: December–April is the dry season with the calmest seas; September–October carry the highest hurricane risk.

Know before you go

  • The tunnel into the chimney is a genuine overhead, however short. Go through one at a time, keep fins high and clear of the coral either side, and skip it if the group is not steady on buoyancy.

Questions divers ask

How deep is Rosemond's Trench?+

Maximum depth is around 36 ft / 11 m, so it works as a long, shallow dive or as the second tank of a morning.

What can you see at Rosemond's Trench?+

The site is home to seahorses, frogfish, turtles and many species of tropical fish, worked over coral formations shaped like fingers with valleys and trenches between them.

Sources

  1. Diving in Saint Lucia — Saint Lucia Tourism Authority

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Coral in 6 m a short swim off the beach, wall to 43 m

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