Activities in Koh Rong — diving, bioluminescence and tropical forest
Activities in Koh Rong for expats and visitors — diving, snorkelling, nocturnal bioluminescence, jungle hikes and inter-island excursions.
- Difficulty
- Easy
- Reading
- 4 min
In 3 bullets
- Bioluminescence: a unique natural phenomenon visible without any equipment from June to October — phytoplankton makes the water glow at night.
- Diving and snorkelling: coral reefs accessible from the main beaches, warm and clear water in the dry season.
- Preserved tropical forest: 80% of the island is covered in primary forest inaccessible from the mainland — hiking in an exceptional setting.
Bioluminescence
The northern bay of Koh Rong is one of the best bioluminescence sites in South-East Asia. Dinoflagellate phytoplankton produces spectacular blue light when the water moves.
- Best period: June to October (rainy season — phytoplankton more abundant).
- Conditions: moonless night, away from village lights. Isolated beaches offer the best display.
- Activity: swim gently in the bay at dusk — the bioluminescence reveals itself on contact with the body in the water.
- Organised tours: several Koh Touch operators offer nocturnal kayak tours (~15–20 USD/person).
Diving and snorkelling
Koh Rong is surrounded by healthy coral reefs accessible from the main beaches.
| Activity | Indicative price | Notes |
|---|---|---|
| Snorkelling (equipment rental) | 3–5 USD/day | Fins + mask + snorkel |
| Guided snorkelling trip | 20–35 USD | Group, half-day |
| Discovery dive (intro) | 50–80 USD | With PADI instructor |
| Open Water PADI (certification) | 300–400 USD | 4 days, international certification |
| Fun dive (certified) | 35–50 USD/dive | 2 dives + guide |
Indicative prices 2025 — book with the PADI-certified dive centres at Koh Touch.
Forest hikes
Tropical forest covers the majority of Koh Rong. Trails exist but are poorly marked — hiring a local guide is strongly recommended to avoid getting lost.
- Koh Touch → Long Beach crossing: ~2h walk through the forest. Existing path, ask for directions in the village.
- Night hikes: some lodges organise evening outings to observe wildlife (phosphorescent frogs, nocturnal insects).
Kayaking
Kayak rental available from several points in Koh Touch:
- Single kayak: 5–8 USD/hour
- Double kayak: 8–12 USD/hour
- Bioluminescence kayak tour: 15–20 USD/person (evening)
Monthly leisure budget
| Profile | Leisure budget | Includes |
|---|---|---|
| Minimalist | 50–100 USD | Beach, snorkelling, swimming, hikes |
| Active standard | 150–300 USD | 2–3 dives, bioluminescence kayak, excursions |
| Intensive | 300–600 USD | Dive course, multiple tours, inter-island trips |
2025 estimates — Koh Rong is more expensive than the mainland for organised water activities.
FAQ
Is bioluminescence visible all year?
The phenomenon is present year-round but most intense from June to October (rainy season — water richer in phytoplankton). In the dry season it is less visible but can still be observed on a moonless night in protected areas.
Are the coral reefs of Koh Rong in good condition?
The state of the corals varies by site. The protected zones of the marine national park have corals in better condition than the areas around the main village (impact of anchoring and boat traffic). Ask the dive centres for the best current spots.
Are there activities for children in Koh Rong?
Yes: snorkelling in shallow water (from age 5 with an adult), safe beaches, kayaking in calm water, watching bioluminescence at night. Koh Rong is well suited for families on a short holiday.
Sources (2)
Every fact in this guide comes from official documents or government sites. An access date is recorded for each source.