Diving in Ranong is known for untouched sites with few crowds. It's possible to dive here for a week and not encounter another boat. Ranong's marine creatures are not yet tamed by the presence of divers so behaviours you see are lovely and natural. This precious experience is becoming rare.
Whale sharks, manta rays and bowmouth guitar fish hang out on deeper seamounts. Drift along with shrimp and pipefish as barracuda and mackerel hunt and frogfish take a walk. Eagle rays swoop, nurse sharks shelter and leopard sharks rest on the sand.
Deeper sites have strong currents, but huge sea fans and tunnels filled with glassfish are a visual feast for experienced divers. Small offshore islands swirl with life, while divers lap up deep drop-offs and pinnacles. Diving in Ranong is a wild ride.
In Ranong you can go diving all year as the tropical climate doesn't vary much. The average water temperature is 80°F/26°C and visibility is good with lows of 15m and highs of 30m. The currents are mostly mild but become stronger as you go deeper.
Divers share the water with 200 species of coral and 1000 fish species which can be appreciated in all seasons. For the best chances of swimming with manta rays, dive from December-March. Nurse sharks and leopard sharks can be found at any time of year if you venture out to deeper sites.
If you plan to extend your Ranong diving vacation with a trip to Myanmar's Mergui Archipelago (a group of 800 islands 40 nautical miles from Ranong) diving season is mid-October to mid-May when visibility reaches a whopping 50m.
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