4 Island Sunset Snorkeling Cruise & Bioluminescent Swim
About this experience
Krabi's most magical evening on the water
Set sail on a private sunset cruise to Krabi's 4 Islands for an afternoon of snorkelling among coral reefs, then stay on the water as darkness falls for a truly magical bioluminescent night swim.
Watch the sea light up around you in electric blue — caused by microscopic bioluminescent plankton that glow when disturbed. It's one of the most extraordinary natural phenomena you can witness in Southeast Asia, and Krabi's calm evening waters are one of the best places in the world to experience it.
Sunset at the 4 Islands
Snorkel coral reefs bathed in golden hour light as the sun dips toward the Andaman horizon.
Bioluminescent Night Swim
After dark, slip into the sea and watch it light up electric blue around every movement — one of nature's most magical shows.
Private Cruise
Your group only — no strangers, no rush. The boat, the guide, and the experience are entirely yours.
Calm Evening Waters
Evening departures mean glassy seas, cooler temperatures, and far fewer boats at the islands.
Book this tour
Select your date and group size below
Everything provided
What's included
Your evening
How the tour unfolds
- 14:30 PMHotel pickup
Collected from your hotel in Ao Nang or Krabi Town.
- 25:00 PMDepart by boat
Set sail toward the 4 Islands as the afternoon light turns golden.
- 35:30 PMSnorkelling stop 1
Explore the coral gardens around Tup Island and Chicken Island at sunset.
- 46:30 PMSunset viewing
Anchor in a calm bay and watch the sun set over the Andaman Sea.
- 57:30 PMBioluminescent swim
As full darkness falls, enter the water and witness the glowing plankton display.
- 69:00 PMReturn to shore
Cruise back to the pier and transfer to your hotel.
Common questions
Frequently asked questions
When does the bioluminescence appear?
Bioluminescent plankton (dinoflagellates) are present year-round in Krabi's waters. They glow most vividly on darker nights — the experience is best around new moon. Your guide will confirm conditions before departure.
Is this tour suitable for non-swimmers?
Yes. Life vests are provided and the guide stays in the water with all guests. Non-swimmers can float with a vest and still experience the bioluminescence fully.
What is the best time of year?
The tour runs November through April during Krabi's dry season. Calm seas and clear skies make for the best snorkelling and the most dramatic sunsets.
How many people are on the boat?
This is a private tour — only your group. Minimum 2 guests, maximum 8 per boat.
What should I bring?
A change of clothes, a towel, sunscreen (reef-safe preferred), insect repellent for the evening, and a waterproof bag for your phone.
Ready to glow in the dark?
Book your private sunset cruise and bioluminescent swim above — or explore more of Krabi's best tours.