Safety · Destination Guide
Wrecks, coral gardens, and slow-island beach days in Thailand's eastern Gulf
Updated Jan 23, 2026 • 16 sources
Most dives and snorkel sessions are on shallow reefs, but the area is still remote and seasonal. Treat the monsoon as a real planning factor, use surface signaling on every boat dive, and keep deep wreck profiles conservative.
Monsoon sea crossings and cancelled boats
From roughly May to October, wind and rain can make crossings rough and cause same-day cancellations. Build buffer days and avoid tight connections between islands.
Wreck depth and overhead temptation
The wreck profile is deep and narcosis and gas consumption can surprise newer divers. Do not enter overhead spaces without proper wreck training and a team plan.
Scooter safety on steep roads
Koh Chang roads can be steep and slick after rain. If you rent a scooter, wear a helmet, avoid night rides, and choose a bike you can comfortably handle.
Sun, heat, and dehydration
Snorkel days are exposed. Use a rashguard, rehydrate aggressively, and plan shade breaks to avoid heat stress.
Do Not Do This
Avoid entering when monsoon sea crossings and cancelled boats. Confirm local briefings before committing.
| Contact | Role | Phone | Availability |
|---|---|---|---|
| Thailand Tourist Police | Assistance for tourists, reporting issues, coordination | 1155 | 24/7 |
| Thailand Emergency Medical Services | Ambulance and medical emergency response | 1669 | 24/7 |
| Thailand Police Emergency | Police emergency line | 191 | 24/7 |
| Mu Ko Chang National Park | Park office contact (local coordination) | +66 39 510 928 | Office hours vary |