Glide past karst cliffs at sunset, snorkel clear bays and finish with a night swim that may reveal glowing bioluminescent plankton. This 7‑hour longtail boat tour from Ao Nang pairs a beach BBQ and short hikes with conditions‑dependent nighttime magic.
More ways to explore the area's outdoor wonders
Longtail engines hum as the boat slips away from Ao Nang and the shoreline thins to a strip of lights. The air tastes faintly of salt and charcoal from the beach BBQ you’ll eat later; limestone cliffs rise like weathered walls as the sun slides behind them and paints the water orange.
Difficulty
easy
Duration
7 hours
Fitness Level
Suitable for most fitness levels; requires boarding a longtail boat, short swims and easy beach walks.
Wildlife
History
The islands are part of Krabi’s karst landscape formed by uplifted limestone and coral beds; local fishing communities have used these waters for generations.
Conservation
Operators and visitors are encouraged to use reef‑safe products, avoid touching coral and follow local rules to minimize anchoring damage and nighttime disturbances.
Reserve your spot on the Sunset Tour of the Hong Islands with Bioluminescent Plankton today and enjoy a trusted, highly rated experience designed to help you make the most of your adventure.
Book around the new moon
Bioluminescent displays are strongest with darker skies—check lunar phase and pick nights near new moon for the best chance to see glow.
Bring reef‑safe sunscreen
Oils and chemical sunscreens harm coral and plankton—use mineral/reef‑safe formulas and apply well before entering the water.
Motion sickness prep
The ride can be choppy at times—take anti‑nausea medication or use pressure bands if you get seasick.
Waterproof small valuables
Night swims and beach stops mean wet pockets—use a small dry bag or waterproof phone case.
Light waterproof jacket or windbreaker
Protects against spray and evening breeze after sunset.
winter
Reef‑safe sunscreen
Protects skin without damaging coral or plankton.
Waterproof headlamp or small flashlight
Useful for moving around during the night swim and reboarding boats.
Dry bag (small)
Keeps phone, passport and dry clothes safe from splashes and sand.