We track 6 dive operators in Castries. 4 teach certification courses (4 PADI). 6 run snorkelling trips. The biggest cluster is around Gros Islet, with 5. Listings are ordered by Fin Rank: a published score for how complete and verified each listing is.

Dive Saint Lucia / Scuba Steve's Diving is a PADI 5 Star Dive Center located in Rodney Bay, Saint Lucia. They offer a variety of PADI courses, guided dives, and snorkeling tours. The dive center is situated at Harmony Marina Suites.

Sealife Paradise is a dive center located at Pigeon Island beach, Gros Islet, Saint Lucia. They offer guided dives, snorkeling tours, and PADI courses. The center provides access to the marine reserves around Pigeon Island.
Eastern Caribbean Diving Limited is a PADI 5 Star Dive Resort located at Windjammer Landing Resort in Laberlotte Bay, Saint Lucia. They offer a full range of PADI courses, guided dives, and equipment rental. The resort provides a comprehensive vacation experience.

Sandals Dive Center is a PADI 5 Star Dive Resort located within the Sandals Grande St. Lucian resort. They offer PADI courses, guided dives, and equipment rental for resort guests. The center provides access to various dive sites around the island.
St Lucia Sea Trek Adventure at Pigeon Island offers sea trek adventures, which is a unique underwater walking tour. They also provide snorkeling tours and equipment rental. The experience is suitable for non-divers.
SNUBA Adventure Tour offers SNUBA experiences, a combination of snorkeling and scuba diving, at Pigeon Island, Gros Islet, Saint Lucia. This activity allows participants to breathe underwater without the need for certification. They also offer guided tours.
The 6 highest-ranked of 6. How Fin Rank works
| Rank | Operator | TripAdvisor | Try dive | Agencies | Website | |
|---|---|---|---|---|---|---|
| 1 | 4.8(105) | 5.0 | none | PADI | Visit |
Fin lists 6 dive operators in Castries, with the biggest cluster around Gros Islet. 4 of them run certification courses.
PADI is the most common agency (4 centres).
6 of the 6 operators we track run snorkelling tours.
Operators are sorted by Fin Rank, a 100-point profile strength score: contact details, what they offer, the dive sites they run, their Google reputation, whether the owner has claimed the listing, and whether their own website links to Fin. 0 listings here are owner-verified. The formula is published in full on the Fin Rank page.
| 2 | 4.5(105) | 4.5 | none | PADI | Visit |
| 3 | Eastern Caribbean Diving | 4.6(10,500) | 4.5 | none | PADI | Visit |
| 4 | 4.6(10,500) | 4.5 | none | PADI | Visit |
| 5 | St Lucia Sea Trek Adventure at Pigeon Island | 4.5(105) | 4.5 | none | none | Visit |
| 6 | SNUBA Adventure Tour | 4.5(105) | 4.5 | none | none | none |