Blue Hole (Kosrae) - Kosrae

45m Max

20-45m Vis

boat

Site Overview

Blue Hole (Kosrae) is one of the most celebrated dive sites in Kosrae, a spectacular deep vertical shaft in the reef dropping from 15 to 40 plus metres, with large gorgonians, schools of big-eye trevally, grey reef sharks, eagle rays and whale sharks occasionally. The site is defined by a spectacular vertical shaft cutting through the reef from about 15 m down past 40 m, its walls draped in gorgonians and opening onto blue water, creating an underwater landscape that rewards divers with every visit. Schools of big-eye trevally, grey reef sharks and eagle rays circle the shaft, with gorgonians covering the walls and whale sharks possible in season. Water clarity in this part of the Federated States of Micronesia is frequently excellent, with visibility often extending well beyond 20 metres and a comfortably warm tropical temperature year-round. The combination of healthy hard and soft corals, nutrient-rich currents and sheltered reef systems makes Blue Hole (Kosrae) a reliable location for both macro photography and wide-angle encounters. Local dive operators run regular trips to the site from nearby bases, and the geography means conditions are suitable across a range of experience levels with appropriate guidance. Conservation is taken seriously throughout Micronesia, and Blue Hole (Kosrae) benefits from marine protection that keeps fish stocks high and coral coverage dense. Divers who plan their visit around the calm season will find the most predictable conditions, though the site can be enjoyed throughout the year. Blue Hole (Kosrae) deserves a place on any serious Pacific diving itinerary, offering a genuine taste of the untouched beauty that makes Micronesia diving so highly regarded internationally. Regular visitors note that the marine life here, including big-eye trevally, grey reef shark, eagle ray, gorgonian sea fan, whale shark, anthias, makes every descent memorable.

Dive Briefing

"The dive at Blue Hole (Kosrae) begins with a controlled entry and a short transfer from the nearest base, with the guide giving a full briefing on the site layout, expected marine life and emergency procedures. Descending toward a spectacular vertical shaft cutting through the reef from about 15 m down past 40 m, its walls draped in gorgonians and opening onto blue water, divers are immediately surrounded by big-eye trevally, grey reef shark, eagle ray, gorgonian sea fan, with the reef revealing more detail the closer you look. The maximum depth reaches about 45 metres, while the average depth sits near 30 metres, so gas planning and a dive computer keep the profile safe and comfortable. Currents are described as moderate, and the guide chooses the entry time to make the most of slack or mild flow, using a reef hook or DSMB when needed. The topography offers natural swim-throughs and ledges that shelter larger animals, and the open water above the reef often holds cruising pelagics. Throughout the dive, neutral buoyancy protects the fragile coral, and the group stays close to the guide to manage depth and any surge. The safety stop is completed in open water on a DSMB, and the boat follows the bubbles to collect divers at the exit point for a relaxed return to base. A calm morning dive in the dry season gives the clearest blue water and the calmest conditions for the descent."