Tup Island
Two tiny islands off Ao Nang joined to neighboring Koh Mor by a sandbar that rises out of the sea at low tide, so you can walk between them.
Details
Tours that include Tup Island
Skip-the-line entry, guided visits and day-tour combos around Tup Island.
Why go, and how to do it well
Tup Island, also written Tub or Koh Thap, is a pair of tiny limestone islets between Koh Poda and Chicken Island off Ao Nang. What makes it a stop is Talay Waek, the separated sea. At low tide a ridge of sand rises out of the water and links Tup to neighboring Koh Mor, and you can walk the bar with the sea on both sides of you. At high tide it vanishes and Tup is just two small islands with a strip of beach.
It is the third stop on most 4 Islands tours, after Koh Poda and Chicken Island, and the shared longtails from Ao Nang beach that run to Poda usually include it. The tour operators time their stops loosely, so if walking the sandbar is the reason you are going, check the tide table for the day and ask the boat to come at low water.
Written by Mac Kiley · Updated Oct 2026
Stay within reach of Tup Island
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Tours that include Tup Island
Skip-the-line entry, guided visits and day-tour combos around Tup Island.
Experience hints
Pair your visit. After Tup Island, round out your day in Krabi with contrasting stops nearby.
XR66+7PC, Tambon Ao Nang, Amphoe Mueang Krabi
Open in Google MapsMore islands nearby
All within 1.3 km away of Tup Island.
Koh Poda
The first stop on Krabi's 4 Islands tour, an uninhabited limestone island off Ao Nang with a long white beach, clear water and a sea stack offshore.
Chicken Island
Koh Kai, the island off Ao Nang named for a limestone pinnacle shaped like a chicken's head, best seen from the water on a snorkeling stop.
Tips for Visiting Islands
Check Island Closures
Similan Islands, Surin Islands, and Koh Tachai close mid-May to mid-October. Some smaller islands reduce ferry service in monsoon season. Always verify schedules before planning your route.
Snorkel Gear Is Cheap to Buy
Rental gear is often scratched and ill-fitting. Buy a decent mask and snorkel at a Big C for 300–500 THB — cheaper than two days of rentals and much more hygienic.
Bring Cash to Smaller Islands
ATMs on smaller islands like Koh Kood, Koh Mak, and Koh Yao charge high fees and sometimes run out of cash. Withdraw enough on the mainland before heading over.
Tup Island: Frequently Asked Questions
Is Tup Island worth visiting?
Tup Island holds a 4.6★ rating from 126 Google reviews, placing it among the highest-rated islands in Krabi.
When is the best time to visit Tup Island?
The best months to visit Krabi are November – April, with the most reliable weather. Crowds peak in December – February — going early in the day usually means fewer people. Months to think twice about: June – September (rough Andaman seas).
Where is Tup Island located?
Tup Island is at XR66+7PC, Tambon Ao Nang, Amphoe Mueang Krabi, in Krabi. Getting around Krabi: Long-tail boats (islands & Railay Beach); Songthaews in Ao Nang.
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