The 15 Best Bioluminescent Plankton Tours in Krabi

1.Krabi 4 Island Sunset Snorkeling Cruise + Bioluminescent Swim

★★★★★★★★★★5.0 · 1,861 reviews · from $130Our pick

Join Michael and his crew aboard a spacious wooden junk for a relaxed afternoon around Krabi’s islands. Snorkel, kayak, paddleboard, eat a Thai buffet, watch the sunset, then swim near Phra Nang Cave Beach as bioluminescent plankton flashes around you.

“Probably one of the best things money can buy. I had the best day ever. The crew and ship are awesome and Thailand is sick”

Check availability →Read our full review

2.Bioluminescent Plankton, Snorkeling & Sunset Tour

★★★★★★★★★★4.3 · 863 reviews · from $40

Spend 6 to 6.5 hours touring Krabi’s islands by speedboat with an English, Thai, or Malay-speaking guide. You’ll snorkel near Chicken Island, walk Tup Island’s sandbar, eat a halal BBQ on Ko Poda, and look for bioluminescent plankton after dark. Guides such as M, Selina, and Pichi have earned praise for their energy and care.

“We really enjoyed this tour, we visited great islands, snorkelled with amazing fish and watched the sunset on a great beach! There is plenty of time at all the stops and the tour is a perfect length. Our guides were all really nice! The boat wasn’t too crowded / the islands weren’t too busy! Dinner was very good, lots of options and plenty of food! The plankton was an unexpected highlight :)”

Check availability →Read our full review

3.7 Islands Sunset Tour with Plankton Swim and BBQ

★★★★★★★★★★4.0 · 808 reviews · 7 hours · from $49

Spend seven hours island hopping by long-tail boat or speedboat, with stops at Chicken Island, Koh Tan Ming, Poda, Tup, Railay, and Phra Nang. You will snorkel, eat a beach BBQ, watch the sunset, and swim for bioluminescent plankton. Guides such as Cha, Vee, and Ming are known for keeping the day lively.

“Amazing trip, really looked after you and made sure you had plenty of food and water. The islands were beautiful, our guide was really funny and told us some history at each island. Poda island is as beautiful and the BBQ was good food too. Would recommend!”

Check availability →Read our full review

4.Railay Phra Nang & Diamond Cave Sunset Plankton Tour

★★★★★★★★★★4.5 · 373 reviews · 5 hours - 390 minutes · from $28Best value

You’ll cruise from Krabi to Railay, walk to Phra Nang Cave, visit Diamond Cave, and enjoy sunset beach time before seeing bioluminescent plankton after dark. Guides such as Jess, Peter, Nina, and Leen are praised for friendly care, clear explanations, and practical help in the water.

“I'm happy with the guide and transportation. The guide also provided good explanations.”

Check availability →Read our full review

5.7 Islands Sunset Hopping Cruise with BBQ & Plankton

★★★★★★★★★★4.4 · 250 reviews · from $37

Spend an afternoon and evening visiting Krabi’s island highlights, from Phra Nang and Thale Waek to Chicken and Poda. Your English-speaking guide, such as Jess, Palm, Bee, or Peter, handles the day while you snorkel, eat a BBQ dinner, watch sunset, and look for bioluminescent plankton.

“Great, guide was so friendly and made sure everyone was okay!”

Check availability →Read our full review

6.4 Islands Sunset + Plankton, Semi-Private Tour only 12 Guests

★★★★★★★★★★5.0 · 166 reviews · from $81

Spend about seven hours exploring Poda, Tup, Chicken Island waters, Phra Nang Cave Beach, and Railay with a group of no more than 12. Your guide, often Hat or Joy, handles the route, food, drinks, snorkeling gear, and hotel transfers. The highlight is night snorkeling with glowing plankton.

“Traveled with family & we were only in Krabi/Aonang for 2 nights. We had a fantastic guide, beautiful locations, refreshing snacks, and we had so much fun! The plankton experience was very cool too!”

Check availability →Read our full review

7.Krabi 7 Islands Snorkeling & Plankton Night by Big Longtail Boat

★★★★★★★★★★4.0 · 164 reviews · from $52

Spend 7 to 8 hours around Krabi’s islands on a large longtail boat with an English-speaking guide. Snorkel at Ya Wa Sam, Chicken Island, and Ma Tang Ming, walk the Thale Waek sandbar, eat dinner at Poda Island, then swim among bioluminescent plankton near Koh Rang.

“If you’re ready for a super relaxing time on the water with some good swimming, good snorkeling and beautiful views of the majestic rocks, this is your tour. Had a nice time with my adult kiddos enjoying the wonderful country of Thailand and Krabi is a not miss place.”

Check availability →Read our full review

8.Bio Luminescent Swimming From Krabi

★★★★★★★★★★3.5 · 85 reviews · from $43

Spend six hours island hopping from Krabi, Ao Nang, or Klong Muang, with snorkeling at Ko Ya Wa Sam and Ko Ma Tang Ming, Poda Island, Chicken Island, sunset dinner, and a night swim at Ko Daeng. A guide, boat, gear, water, fruit, and hotel transfers are included.

“It was a bit disorganized (for boarding and going back to our hotels), but over all was a nice trip and the staff was very kind and helpful. We had a storm (that they knew would happen) and we still went - so we all ended up drenched - our stuff and bags too because to boat didnt had windows/walls (only a cheap roof). We were cold for the rest of the night. We had no fire show on the beach. This isnt a bbq either, but the food was good still. We did see the planktons very well because the clouds were covering the moon.”

Check availability →Read our full review

9.Railay Beach Bioluminescent Plankton Ferry Cruise

★★★★★★★★★★3.7 · 60 reviews · 3 hours · from $41

Meet beside Burger King Ao Nang at 4:30pm for a 5pm boat to Railay. You get sunset views, free time among limestone cliffs, snacks, snorkeling gear, and a short night swim with bioluminescent plankton. The glow depends on tide, moonlight, and water conditions, so it is never guaranteed.

“el plancton no existía, vimos 3 luces pequeñas y nada parecido a las fotos y videos. una gran desilusión. el barco muy ruidoso y no se veía nada para afuera, parecía una cueva. y el guía hablaba muy mal, no le entendimos casi nada. mala experiencia.”

Check availability →Read our full review

10.Railay Sunset and Bioluminescent Plankton Tour

★★★★★★★★★★3.9 · 55 reviews · 3 hours - 210 minutes · from $31

You’ll leave Ao Nang by traditional longtail boat, spend free time swimming and watching sunset at Railay Beach, then look for bioluminescent plankton after dark. A guide speaking English or Thai accompanies you, with snacks, fruit, juice, water, insurance, and life jackets included.

“Everything was very rushed and we left about 30min late due to some late passengers. The boat look ok but the steps are not safe and the guy supposedly helping people in and out was not that bothered. I ended up slipping and hurting my foot and not even an apology or a "are you ok?". Railay is obviously nice but too crowded with boats and people and the planktom is hit and miss. There are many others beached in thailand and even in Krabi that will be better”

Check availability →Read our full review

11.Hong Islands Sunset, Bioluminescent Plankton and BBQ

★★★★★★★★★★4.3 · 41 reviews · 5 - 7 hours · from $54

From Krabi or Ao Nang, cruise by speedboat or longtail boat to Lading, Hong, and Pak Bia islands. Swim, snorkel, eat a Thai-style BBQ by the beach, watch the sunset, and look for glowing plankton after dark. The plankton show depends on tide and moon conditions.

“The trip was nice, the places we visited were very nice, the guide was nice. Unfortunately they packed the longtail boat wirh too many people on unmarked seats and some people were lacking common sense and personal space, sat on our stuff, moved our stuff and sat on our space, pushed us on the bench, pushed us when in line for the boat to get best spot. That created a very stressful atmosphere and ruined everything. I got at some point sick of it and almost caused a scene. horrible when u want a nice day.”

Check availability →Read our full review

12.7 Islands sunset tour plus bioluminescent plankton + BBQ

★★★★★★★★★★4.3 · 21 reviews · 6 hours · from $41

Spend six hours exploring Krabi’s four-island route and quieter nearby beaches by boat. You’ll snorkel at Chicken Island, walk Tup Island’s sandbar, eat a Halal BBQ at Ko Poda, and look for glowing plankton after dark. Hotel transfers, equipment, drinks, snacks, and an English-speaking guide are included.

“we enjoyed all of the tour. no improvement needed”

Check availability →Read our full review

13.7 Island sunset tour by Speedboat | Catamaran plus BBQ & Plankton

★★★★★★★★★★4.0 · 21 reviews · from $51

Set out from Ao Nang at 2:30 pm for Railay, Phra Nang, Chicken, Tup, Mor, Poda, and Tang Ming islands. You’ll snorkel, walk a tide-dependent sand bar, eat a Halal BBQ, watch sunset, and look for bioluminescent plankton. Guides may include M or Selina.

“Activité bien encadrée et organisée. Malheureusement un peu trop de monde sur le bateau et certaines personnes pas franchement respectueuses. Guide intéressant et à l'écoute. Toilettes sur l'île ou nous prenons le repas du soir. Très pratiRead more”

Check availability →Read our full review

14.Hong Island Sunset Tour+Bioluminescent Plankton

★★★★★★★★★★4.3 · 20 reviews · 7 hours · from $63

Join Kratae Pateaw Tours for a seven-hour evening from Krabi, with hotel pickup, longtail boats, Hong Island, a steep 360-degree viewpoint, Hong Lagoon, Thai buffet dinner at Pakbia Island, and night swimming for bioluminescent plankton at Koh Raeng. Guide Beeb has received particular praise.

“Di tutte le escursioni fatte, questa è quella che mi ha deluso di più, alcune tappe sono state fatte senza un preciso ragionamento, a cosa serve andare in una baia nel pomeriggio se non c'è più il sole, posso capire se la spiaggia in questione ha qualcosa di bello, ma in questo caso non c'era niente, forse di giorno era bellissima. Per quanto riguarda la bioluminescenza, non è così visibile come si vuole fare credere. Di tutti tour il meno bello ed entusiasmante.”

Check availability →Read our full review

15.7 Islands Sunset Tour & BBQ & Bioluminescent Plankton

★★★★★★★★★★4.4 · 10 reviews · from $39

Spend about eight hours by longtail boat around Krabi’s islands, with snorkeling at Yawasam and Tang Ming, Chicken Island photos, Koh Mor and Koh Tub’s sandbar, a beach meal at Poda, plankton after dark, and a planned fire show. Hotel pickup is available from several Krabi areas.

“The activity was great, the islands stunning and the snorkeling excellent, but the dinner was massively different to what was sold so be aware. The bbq was non-existent and was actually an average buffet in a restaurant where they put you apart from the other guests, and there was no fire show whatsoever. I’d still recommend the tour as it’s good value for money, but be aware it’s not as is sold. We were also on a boat with a load of people who didn’t want to go on the islands or snorkel and just say there. Slightly weird but not the fault of the trip!”

Check availability →Read our full review