Similan Islands From Khao Lak: Day Trip Guide

Featured image: josh.ev9, CC BY-SA 2.0, via Flickr.

Similan Islands From Khao Lak: The Quick Answer

Day trips run to Mu Ko Similan National Park, an archipelago of 11 islands about 70 km offshore. Most tours pick you up at your Khao Lak hotel and drive you to Tab Lamu pier. Some sources spell it Tablamu or Taplamu. Speedboats then cross in about 70 minutes. Expect an early start and a full day, with snorkeling stops and beach time on set islands.

• Departure: Tab Lamu pier, usually with hotel pickup
• Speedboat crossing: about 70 minutes each way
• Park size: 11 islands, about 140 sq km
• Overnight stays: discontinued, day trips and diving only
• Season: roughly mid-October to mid-May

When the Park Is Open

Mu Ko Similan National Park opens each year from about 15 October to 16 May. Heavy monsoon seas close it for the rest of the year. The closure also gives the reefs time to recover. November sits inside the season, but a program listed online does not prove the park is open on your date. Read the latest visitor notices on the Department of National Parks site, which are mostly in Thai. Ask your operator to confirm your departure in writing. Our Khao Lak diving season guide shows how sea conditions shift across the months.

Speedboat, Slow Boat or Liveaboard

Speedboats are the common choice. A slow boat takes about 3 hours to reach the islands. Speedboat pickup, pier transfer and a 70-minute crossing each way already cost about 140 minutes in transit. Liveaboards are a separate product for divers, with itineraries set by the operator. Ask how many hours you actually spend on the islands, since no fixed number applies across operators.

Boat Day or Mainland Beach Day?

An organized excursion moves on when the program says so. If you want a long lunch and no schedule, a mainland day suits you better. Consider group pace, seasickness, snorkeling confidence, children and mobility. A nervous swimmer may enjoy calm mainland water more. Our Khao Lak snorkeling guide covers options without a long boat ride. Choose the Similan trip if beach stops and guided reef swims are the point of your day.

Snorkel, Dive or Beach: Pick Your Trip

Snorkel tours are the easiest entry for most visitors. Certified divers can read about the routes in our Khao Lak diving overview. Compare reefs on the Khao Lak dive sites page. Operators are listed in our Khao Lak dive shop roundup. Sea Dragon is one option, profiled on its dive center page, and you can see its own offers at the operator's website. Treat any single itinerary as an example, since routes change.

Total Cost Checklist

Prices and hours checked November 2026. A 2024 local listing gave a park fee of ฿500 for foreign adults and ฿300 for foreign children. Treat those as a starting point and check current rates with the park. Some quotes leave the fee out to look cheaper, then add it later. The same listing reported a daily cap of around 3,000 visitors, so busy dates can sell out. Compare quotes line by line before you pay.

• Hotel transfer and pier transfer
• Park fee, and whether it is included
• Meals and drinking water
• Mask, snorkel and fins
• Insurance
• Cancellation and rebooking terms
• Guide language, in writing

Can You Stay Overnight?

No. A Department of National Parks statement dated 10 August 2026 describes Similan tourism as day trips and diving, and says overnight stays on the islands have been discontinued. Older guides list bungalows and campsites on 3 of the 11 islands. Do not book around those. A diving liveaboard sleeps you on a boat, not on land, and its terms come from the operator.

What You May See

Ko Miang is Island 4 and holds the park headquarters. Ko Similan is Island 8, and some trips include a viewpoint stop there. The name Similan means nine, for the original nine islands. Ko Tachai and Ko Bon joined in 1998 to make 11. Reefs may bring turtles, rays and reef sharks, though sightings are never guaranteed. Our Khao Lak turtle guide sets expectations for turtles. Check the Khao Lak water temperature page to decide whether you want a wetsuit.

Packing and Park Rules

Bring a small waterproof bag, a change of clothes and your booking confirmation. DNP guidance from March 2026 bans touching or standing on coral. It also bars single-use plastic packaging and foam in national parks. Restricted sunscreen ingredients are oxybenzone, octinoxate, 4-MBC and butylparaben. Read the ingredient label rather than trusting a front-of-pack claim. Carry your rubbish back to the mainland.

Choosing Your Day and a Backup Plan

Book the trip for a day with no airport transfer or fixed commitment afterwards. Leave one spare Khao Lak day, since operators cancel in rough seas and another departure may be full. Have a mainland plan you would enjoy too. Divers can look at the Boonsung wreck dive as a mainland-side alternative. Save the pickup time, inclusions and cancellation terms with your confirmation.