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What really happens on the afternoon 7 Islands trip from Krabi, from the snorkel stops to the BBQ on the beach and the glowing plankton swim, plus who should pick it over the classic 4 Islands day.
It is half past twelve, you have had a slow breakfast and a swim at the hotel pool, and the minivan for your island trip has not even left yet. That is the whole point of the 7 islands sunset tour Krabi offers: the same famous islands as the morning trips, but on a clock that suits people who are on holiday.
You trade the crisp morning light for a softer afternoon, the sunset from the water, dinner on a beach and, if the night plays along, a swim in water that sparkles when you move. Here is what the day looks like, where it shines and where it disappoints, so you can decide with open eyes.
The tour starts after lunch because it is built around the sunset and the dark that follows, not around the islands alone. The listed program runs about 6 hours, from roughly 13:30 to 19:30, with pickup from your hotel in Krabi or Ao Nang.
The morning tours are timed for calm water and an early return. This one shifts everything later: island stops in the afternoon, the sunset on the water, dinner as the sky turns orange, and the plankton swim once it is properly dark. The plankton is the reason it cannot run earlier.
There is a side benefit. The big wave of morning boats has mostly gone home by the late afternoon, so some stops are calmer than they are at 11:00. Do not expect empty beaches, as other sunset trips run too, but the feel is more relaxed.
The downside is the heat of the first stops. Between about 13:30 and 16:00 the sun is still fierce, and on the water it feels stronger. Put sunscreen on before pickup, not on the boat.
The route covers Ko Tan Ming and Ko Si, Phra Nang Beach, Chicken Island, Tup Island, Poda Island and Railay Beach with Phra Nang Cave. It is mostly the 4 Islands route plus a couple of rocky snorkel spots, done on a traditional longtail boat.
Ko Tan Ming is a small island just in front of Poda, and the boat usually starts with a snorkel there before working round to Ko Si. This is the rocky, reef-and-caves part of the day: fish around the boulders and the best chance of clear water if the sea is calm.
Chicken Island is the one everyone recognises from photos, with its rock shaped like a chicken's head. The reefs along its edge are some of the best snorkelling on the route. Tup Island is next to it, and if the tide is low, a sandbar joins the two and you can walk across. That sandbar depends on the tide, so it may or may not be out on your day.
Poda gives you a long white beach and clear water for an easy swim. Phra Nang and Railay are the dramatic ones, with tall cliffs, climbers hanging off the rock and the Princess Cave shrine at the end of the beach. Railay is reached only by boat, so this is a nice way to see it without a separate trip.
The exact order and the time at each stop change with the tide and the weather. The crew decides on the day, and on choppy afternoons they may cut a stop to make sure you reach the sunset spot in good time.
No two days run exactly the same, but this is the usual shape of the trip, so you know what to expect and when:
The island part is shorter than on a full morning trip, so you will not have long, lazy hours at any one beach. Think of it as a sampler: a swim here, a snorkel there, a few photos, back on the boat. If you want to spend half a day lying on Poda, the morning tour suits you better.
You watch the sunset from a beach on the islands, and the BBQ dinner is served buffet-style as the light goes. Dinner is included in the price, along with fresh fruit and soft drinks throughout the trip.
The sunset is the part people underestimate. The limestone stacks turn black against an orange sky, the longtails sit in silhouette, and the whole group goes quiet for a few minutes. On a clear evening in the dry season it is simply beautiful. On a cloudy one you may get a grey fade instead, which is the risk of any sunset trip.
Sunset in Krabi falls roughly between 18:00 and 18:45 depending on the month, so the timing of the stops is planned around it. If you are travelling with a camera, the half hour before sunset gives the warmest light on the cliffs.
Dinner is a simple beach BBQ rather than a restaurant meal: grilled skewers, rice, salad and fruit, served as a buffet. It tastes better than it sounds after an afternoon of swimming. If you have allergies or eat vegetarian, say so when you book so the crew can plan.
Alcohol is not part of the included drinks. Some guests bring a beer or two, but go easy: you are swimming in the dark after dinner, and that is not the moment to be tipsy.
Maybe, and anyone who promises it is overselling. The glow is brightest on dark nights around the new moon and can be faint or hard to see near the full moon.
Bioluminescent plankton are tiny organisms that give off a flash of blue-green light when the water moves around them. You swim with a mask and snorkel near Railay Beach after dark, wave your hands and kick your feet, and on a good night every movement leaves a trail of small sparks. It feels like swimming through stars.
Several things decide how much you see:
My honest advice: if the plankton is the only reason you are booking, check a moon calendar and pick a date near the new moon. If you see it, it is magic. If you do not, you still had the islands, the sunset and dinner on the beach, and that alone makes it a good afternoon.
The swim itself is short and gentle, and life jackets are included. Nervous swimmers can stay close to the boat, and some people simply dip a hand over the side and watch the sparks. Nobody has to jump in.
Pick the 7 Islands if you hate early starts, love sunsets or are travelling as a couple. Pick the 4 Islands if you want more daylight on the beaches, calmer morning water and the best light for snorkelling.
| 7 Islands sunset tour | 4 Islands tour | |
|---|---|---|
| Time | About 6 hours, 13:30 to 19:30 | About 7 hours, 08:30 to 15:30 |
| Boat | Longtail | Longtail or speedboat |
| Price from | ฿1590 adult, ฿1190 child | ฿1290 longtail, ฿1490 speedboat |
| Meal | BBQ dinner on the beach | Lunch on the islands |
| Extras | Sunset and plankton swim | More beach time in daylight |
| Best for | Couples, late risers, sunset lovers | Families, keen snorkellers, photographers |
The islands overlap a lot, so doing both in one trip is not the best use of your time. If you have only one island day in Krabi, the decision is mostly about the clock. Morning people get more beach time and clearer water. Evening people get the sunset and the plankton.
Families with small children should think twice about the sunset trip. Kids under 3 go free, but a toddler who is cold, wet and overtired in the dark by 19:00 can turn the best evening into a long ride home. The 4 Islands tour by longtail boat is the easier pick for young families. If you are still weighing the morning boats, there is a guide on longtail or speedboat for the 4 Islands.
The 7 Islands sunset tour starts from ฿1590 for adults and ฿1190 for children aged 3 to 11, and children under 3 go free. The national park fee is not included: ฿400 for adults and ฿200 for children aged 3 to 11, paid on the day.
The price includes:
People with heart or other serious medical conditions and pregnant women are not allowed on this tour. That rule is about the boat ride and the night swim, and it is applied seriously. The program can also change with the weather without notice, which on the Andaman coast mostly means a stop gets swapped or shortened.
Couples who want the islands and the sunset, people who are not morning people, and anyone who has already done a classic morning trip and wants the same scenery in a new light will enjoy it most. Travellers who mainly want serious snorkelling should look at a morning trip instead, when the water is usually calmer and clearer.
Bring a swimsuit, sunglasses, sunscreen and a hat, plus one thing most people forget: a light dry layer for the ride home after dark. Wet swimwear and the wind on a longtail at night can make you surprisingly cold.
Eat a light lunch before pickup. Dinner comes late in the program, and swimming on a heavy stomach in the afternoon heat is no fun. If you get seasick, take a tablet an hour before the minivan arrives.
Book a day or two ahead in high season, check the moon if the plankton matters to you, and keep your phone on: the exact pickup time is sent right after booking. You can see every other trip on the Go Krabi Tours home page, or message us on WhatsApp if you are unsure which date looks best.
The listed program runs from about 13:30 to 19:30, including transfers. The exact time depends on the sea, the traffic and where your hotel is. If you want a late drink in Ao Nang afterwards, keep it flexible rather than booking a fixed table.
The swim is short, close to the boat and done with life jackets available, under the eye of the guide and crew. You can stay on the boat and watch from the side if you prefer. Follow the crew's instructions and do not swim off on your own.
The tour runs every day, but in the rainy months the weather can change the program or cut a stop. Sunsets are often cloudy then, and heavy rain can reduce the plankton. Keep a backup date if you can.
There is no toilet on a longtail boat. Some beaches have basic toilets, a few with a small fee, so bring some small notes. Use the facilities at the pier before you board.
Tell us when you book and the crew will plan for it. The buffet usually includes rice, salad and fruit, so you will not go hungry. Mention any allergies at the same time.
Yes, for people in reasonable health who can climb in and out of a longtail from knee-deep water. The pace is slow and the swims are optional. People with heart or other serious medical conditions cannot join.
In high season, book a day or two ahead, as the afternoon trip fills up with couples and late risers. In quieter months a day ahead is often enough. Your pickup time arrives right after booking.
Hotel pickup, insurance and a licensed local operator. Ask us anything on WhatsApp before you book.
Updated 24 October 2026.
