Half Day Boat Trip Krabi or Full Day? How to Choose the Right One

It is the night before, there is a cold drink on the table in Ao Nang, and the group chat has split in two. One person has searched for "half day boat trip Krabi" and wants to be back for a late lunch by the pool, while another says that if you are paying for a boat, you should stay out until dark.

Both can be right. The answer depends less on your budget than on where you want to go, who is coming and how well your group handles a long day of sun. Here is how I would decide, using the programs and prices actually listed for each boat.

Half day boat trip Krabi: what actually fits in 4 or 5 hours?

A half day comfortably covers the islands close to the coast: Koh Poda, Chicken Island, the Talay Waek sandbar and Railay. Hong Island and Phi Phi do not fit, and no boat lists them as a half day. That single fact settles the question for many people.

The 4 Islands area sits a short way off Ao Nang and Railay, so you spend your time in the water rather than crossing it. In a half day you can expect a couple of good swims, a walk on the sand and some snorkelling, without feeling that you have been rushed from one place to the next.

The honest limit is the number of stops. Four hours goes faster than you expect, since boarding, anchoring and getting people in and out of the water all take time. If somebody in your group wants every island plus a long lunch on the beach, a half day will feel short.

Half days are also the only option on one boat. The Luxury Long-tail Boat lists a single 4-hour trip at ฿6,900 for 2 guests, with ฿1,000 for each extra guest from 3 to 6. For a couple or a small family it is the cheapest way onto the water, and I think it is a lovely way to spend a morning.

Not every short option is an island trip, either. The Power Catamaran 72ft runs a 2-hour Krabi River cruise past a fish farm and the mangrove forest for ฿35,000. That is less a half day than an outing, and it suits big groups rather than beach lovers.

How do half day and full day prices compare?

On every boat that offers both, the full day costs more but well under double the half day. Per hour on the water, the full day is usually the better deal. Whether you actually want all those hours is another question.

A few things stand out once you put the programs side by side. The Power Catamaran 40ft has one of the gentlest steps up: the 4 Islands at ฿22,000 for a half day against ฿29,000 for the full day, on the same route. If your group would use the extra time, that step is good value.

The Long-tail Boat works differently. Both half days cost ฿8,900 and the full day is ฿15,000, which is still a bigger jump in proportion. But eight hours on a long-tail is a real commitment, as I explain below, so do not book it on price alone.

Blue Atoll is the one boat where morning and afternoon differ in price. The afternoon runs 5 hours instead of 4 and costs ฿39,000 instead of ฿34,500. If you want a Blue Atoll half day, that extra hour is the one I would pay for, because it falls in the softer light at the end of the day.

Watch the extras if you are a bigger group. Each boat counts guests in its own way, so a boat that looks cheap for two people may not be cheap for your group. The manager will confirm the final price for your exact number. The full guide to charter prices goes deeper on this.

Which routes really need a full day?

Hong Island and Phi Phi need the full day, without exception. Every listed program to these two destinations runs at least 8 hours, and the Lavezzi 40 takes 10-12 hours for each. Nobody should try to squeeze them into a morning.

Here is how I would sort the routes by how much time they deserve:

• Half day is enough: the 4 Islands area, if you accept that you will not linger at every stop.
• A long half day is ideal: Railay and Poda on the Lavezzi 40 in 6-8 hours at ฿20,000, for people who like to take it slow.
• Full day needed: Hong Island and its lagoon, with Pak Bia and Lading on the way.
• Full day and a strong stomach: Phi Phi, which lies in the open Andaman Sea and has a longer crossing.

Hong Island is the one I would stretch for. The lagoon inside the limestone walls is worth seeing, and the day has a nice rhythm with swim stops on the smaller islands. Note that the islands are national park, so the park fee applies on top of the boat price.

Phi Phi needs a more honest conversation. Yes, it is famous, but much of your day goes on the crossing, and the open sea can be uncomfortable when there is any swell. Maya Bay has a no-swimming rule and can close for restoration, so do not plan your whole day around one beach. For many first-time visitors I would pick Hong Island over Phi Phi.

A full day on the 4 Islands is the luxury option rather than a necessity. You see the same places at a slower pace, with longer swims and time to wait for the tide. If your group enjoys doing very little in beautiful surroundings, it is a fine way to spend a day. If people get restless, it may feel long.

Half day or full day with kids?

With small children, choose the half day. The morning half day is usually the easiest one for young kids, as they tend to be at their best early and you are back before the long afternoon. Older kids who love the water can handle a full day, especially on a catamaran with room to move around.

The issue with a long day is rarely boredom. Children get tired, overheated and overexcited, and a boat has no easy way to end the day early once you are far out. A trip that finishes while everyone is still happy will be remembered better than one where the last two hours were spent managing a meltdown.

Boat choice matters as much as hours. Catamarans give you shade, stability and space for a nap. On the power catamarans, children aged 3-12 cost ฿300 as extra guests beyond the base number. For more detail, see this guide to boat trips in Krabi with kids.

The same logic applies to grandparents and anyone who is not sure how they handle the sea. A half day lowers the stakes: if somebody feels unwell, the end is never far away. Try the shorter trip first if you have the time to go out twice.

What about sun and tide?

Sun favours the half day and tide favours the full day. Midday sun on the water is the hardest part of any trip, and a full day puts you right in it, while a half day can avoid the worst of it. On the other hand, a longer day gives the captain more freedom to fit the stops around the tide.

Morning trips start earlier and usually feel fresher, and the Power Catamaran 40ft even has an 08:00 start. Afternoon trips ease out of the strongest heat and finish in softer light. The later half days, which end at 18:30 or 19:00, are the natural choice for golden-hour photos, and there is more on those in this guide to sunset cruises.

Tide is the catch. The Talay Waek sandbar appears at low tide, and low tide moves through the day and from one date to the next. On a half day with fixed hours it may simply not line up, so if you have your heart set on walking across the sea, ask the manager about the tide on your date before choosing morning or afternoon.

Whichever you choose, the sea decides in the end. From about May to October the south-west monsoon brings swell on the Andaman Sea, and some routes may change or be cancelled. In those months I lean towards a shorter trip closer to the coast and away from the long crossings.

Is a full day on a long-tail a good idea?

It can be, but only for the right group. The Long-tail Boat offers 8 hours for ฿15,000, with a beach picnic, sun deck, outdoor shower and toilet listed, so it is more comfortable than most people expect. Even so, a long-tail is a narrow wooden boat with a loud engine and little protection from a rough sea.

A couple or a group of friends who love the traditional feel will have a great time. A family with toddlers, or anyone with a sore back, may want to stick to the half day or move up to a catamaran. Also ask where the boat can reasonably go in the time, because the long-tail listing gives hours rather than a fixed route.

Catamarans handle a long day better for one simple reason: there is somewhere to go. You can move between shade and sun, lie on the bow net, or lie down when the heat gets to you. For most groups spending eight hours or more on board, I would choose two hulls.

Check the food before you book a full day

Do not assume that a full day includes a meal, because it depends on the boat. On the Power Catamaran 40ft and 72ft, the food listed is seasonal fruits and snacks, which will not carry a group from morning to evening. Ask the manager what lunch would involve before you commit to the longer program.

The boats that do list something more substantial are the Lavezzi 40, with standard food, and Blue Atoll and the Long-tail Boat, each with a beach picnic. On a half day this barely matters: eat a good breakfast, or plan a late lunch on land, and the snacks will carry you through.

A quick way to decide

Most groups can settle this in a minute. Run through the points below in order, and stop at the first one that applies to you.

1. Want Hong Island or Phi Phi? Book a full day.
2. Travelling with small kids, or someone nervous about the sea? Book a half day, ideally in the morning.
3. Just two of you, on a modest budget? The long-tail half days are hard to beat.
4. A group that likes to do very little in the sun? Consider the 4 Islands full day or the Lavezzi 40 trip to Railay and Poda.
5. Still undecided? Book the half day. It is far better to wish you had stayed longer than to count the minutes until you get back.

For the short day, the Luxury Long-tail Boat suits couples, while the Long-tail Boat suits small groups who may want the option of a full day. The Power Catamaran 40ft suits bigger groups on the 4 Islands, and Blue Atoll suits those who want a hosted day with a picnic.

Long-tail Max 6 persons Luxury Long-tail Boat From฿6,900 Long-tail Max 8 persons Long-tail Boat From฿8,900 Power catamaran Max 25 persons Power Catamaran 40ft From฿22,000 Sailing catamaran Max 30 persons Blue Atoll From฿34,500

When you know your date and number of guests, send a request. It is free and non-binding, and a manager will confirm whether the boat is available and what the final price is. If you still cannot choose, say so in the message and ask which program they would suggest for your group and your date.

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Every boat page shows the routes, prices and what is included. The booking request is free: a manager checks the boat is free on your date and confirms the price.

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Updated 15 November 2026. Prices can change: the boat page always shows the current price.