Com and Jaco sits at the far eastern tip of Timor-Leste, where reef slopes drop toward open water and currents can run with force. The three sites span natural reef, artificial reef, and drift diving, covering a depth range from very shallow to around thirty-five metres. Jaco Island requires a boat and is suited to intermediate divers with solid buoyancy control, while Com Beach and Com Pier are shore-accessible and manageable for beginners. Water stays warm throughout the year, cooling slightly in the middle months before rising again late in the year. The dry season from May through November brings the most reliable conditions. Species recorded here include whale sharks, blacktip and whitetip reef sharks, pygmy seahorses, hairy frogfish, and napoleon wrasse.
Monthly water temperature across Com & Jaco's sites, from satellite sea-surface data corrected for depth. The band shows the site-to-site spread.
Water temperatures remain warm year-round, dipping to their lowest in the mid-year months before recovering toward the end of the year. The dry season from May through November offers the most settled conditions and best visibility. Jaco Island's currents can shift in both intensity and direction, so conditions should be assessed on the day.
Water temperature around Com & Jaco ranges from about 27°C in July to 30°C in January, based on satellite sea-temperature data for its dive sites.
With water around 27–30°C, a rash guard or 3mm shorty works in Com & Jaco year-round.
Fin maps 3 sites in Com & Jaco (3 scuba diving sites).
