Set near Thailand’s eastern seaboard, diving in Koh Chang combines relaxed island vibes with rewarding underwater terrain. Koh Chang scuba diving is best known for the HTMS Chang wreck, coral-covered pinnacles, and fringing reefs rich in tropical fish. Barracuda, moray eels, batfish, and turtles are common sightings, while macro life thrives along reef slopes. Sheltered conditions and gentle currents make Koh Chang an excellent destination for beginners, with deeper wreck dives offering added interest for experienced divers.
Seasonal weather patterns shape Koh Chang diving conditions, with the best time to dive running from November to April. During this dry season, seas are calm and visibility often reaches 20–30 meters. Water temperatures average 28–30°C (82–86°F) year-round. The monsoon months from May to October bring occasional rough seas, though diving is still possible on protected sites. Marine life remains consistent throughout the year, making Koh Chang a dependable Thailand diving destination.
Travel to Koh Chang scuba diving areas typically begins in Bangkok, followed by a 4–5 hour drive or bus ride to Trat. From Trat, ferries operate regularly to Koh Chang, taking around 30–45 minutes. Alternatively, flights from Bangkok to Trat Airport reduce travel time. Once on the island, dive centers are concentrated along the west coast and provide boat transfers to nearby dive sites, including the famous HTMS Chang wreck.
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