Sailing the Andaman Sea from Phuket: Thailand's Island Paradise

Why the Andaman Sea Belongs on Every Sailor's List

The Andaman Sea off Thailand's western coast offers a sailing experience unlike anything in the Caribbean or Mediterranean. Towering limestone karsts rise vertically from emerald water, hidden lagoons reveal themselves only at certain tides, and the cultural richness of Thai island life provides a depth of experience that purely nautical destinations cannot match.

Phuket serves as the primary charter base for the Andaman Sea, with well-equipped marinas and international flight connections making it one of the most accessible exotic sailing grounds in the world. From here, hundreds of islands spread across a cruising area that can fill weeks of exploration without repeating an anchorage.

Phang Nga Bay: Sailing Through a Geological Wonder

The Karst Landscape

Phang Nga Bay, located northeast of Phuket, is one of those places that looks like it cannot possibly be real. Hundreds of limestone monoliths, some rising more than 300 feet above the waterline, stand in a shallow bay of jade-green water. Sea caves, mangrove channels, and hongs collapsed cave systems that form hidden interior lagoons create a landscape that rewards exploration by dinghy and kayak.

The bay stretches roughly 15 nautical miles from Phuket's northeast tip to the mainland coast, and depths are generally shallow at 15 to 30 feet throughout. Navigation requires attention to the numerous rocks and shallows, particularly around the karst bases where underwater ledges extend well beyond the visible rock.

James Bond Island and Beyond

Ko Tapu, better known as James Bond Island after its appearance in a 1974 film, draws crowds of speedboat day-trippers. Arriving by yacht in the early morning or late afternoon, when the tour boats have departed, is the key to enjoying this remarkable needle of rock in relative peace.

More rewarding for sailors is Ko Panak, a karst island with several sea caves and hongs accessible by dinghy or kayak at the right tide. Paddling through a dark cave passage and emerging into a sunlit lagoon surrounded by vertical walls draped in vegetation is one of the defining experiences of sailing in Thailand.

Anchoring in Phang Nga Bay

The bay's shallow depths and muddy bottom provide excellent holding for anchoring. Popular overnight spots include the lee of Ko Yao Noi, a large island in the centre of the bay where the eastern shore offers protection from the prevailing west and southwest winds. The island has a relaxed Muslim fishing village atmosphere, excellent seafood restaurants, and none of the tourist intensity found on Phuket.

The Phi Phi Islands: Dramatic Beauty at Every Turn

Getting There

The Phi Phi archipelago lies approximately 25 nautical miles southeast of Phuket, an easy day sail in the typical 10 to 15 knot breezes of the northeast monsoon season. The passage crosses open water with moderate swells, making it a pleasant introduction to offshore sailing in the Andaman Sea.

Ko Phi Phi Don

The larger of the two main islands, Phi Phi Don, is shaped like a butterfly with its narrow isthmus connecting two hilly landmasses. Ton Sai Bay on the southern side and Loh Dalum Bay on the northern side are separated by just a few hundred metres of flat land, creating one of the most striking geographical features in the region.

Anchoring in Ton Sai Bay puts you within dinghy distance of the island's restaurants, bars, and dive shops. The bay can get crowded during peak season, so arriving before midday secures a better position. Holding is adequate in sand at 20 to 30 feet, though the bottom is littered with old mooring chains that can foul an anchor.

Ko Phi Phi Leh

The uninhabited island of Phi Phi Leh is home to Maya Bay, a stunning enclosed lagoon surrounded by 300-foot cliffs. Visitor numbers are now strictly controlled to protect the recovering coral ecosystem, and yacht access to the bay itself is restricted. However, anchoring off the eastern side of Phi Phi Leh and taking a longtail boat tour around to Maya Bay is straightforward to arrange.

The Viking Cave on Phi Phi Leh's northeastern cliff face is worth a pass in the dinghy. The cave entrance reveals ancient paintings of sailing vessels, and bamboo scaffolding used by bird's nest collectors scales the walls to dizzying heights.

Monsoon Seasons and Weather Planning

Northeast Monsoon: The Prime Season

The northeast monsoon runs from November through April and delivers the best sailing conditions on the Andaman coast. Winds blow from the northeast at 10 to 20 knots, seas are calm, and rainfall is minimal. Visibility underwater often exceeds 80 feet, making this the peak period for both sailing and diving.

Within this window, December through February is the driest and most comfortable period, with average daily temperatures around 30 degrees Celsius and humidity levels that are manageable by tropical standards. March and April see rising temperatures and occasionally lighter winds, though conditions remain excellent for cruising.

Southwest Monsoon: The Off-Season

From May through October, the southwest monsoon brings rain, stronger winds, and larger swells to the Andaman coast. Winds can reach 25 to 30 knots during squalls, and sustained rain is common, particularly in September and October.

Some charter operators continue to run during the early and late shoulder months of May and November, and experienced sailors can find rewarding conditions during these periods. Prices drop significantly, anchorages are empty, and the landscape is at its greenest. However, some islands and marine parks close during monsoon season, limiting your itinerary options.

Beyond Phuket: Extended Cruising Options

The Similan Islands

The Similan archipelago, approximately 55 nautical miles northwest of Phuket, is a national marine park renowned for its diving. The nine granite islands are surrounded by some of the clearest water in the Andaman Sea, with coral formations and marine life that attract divers from around the world.

Yacht access to the Similans requires a national park permit, and anchoring is restricted to designated areas. The passage from Phuket crosses open water and is best attempted in settled conditions during the northeast monsoon season.

South to Ko Lanta and Ko Lipe

Sailing south from Phi Phi, the coast of Krabi Province offers limestone cliff scenery that rivals Phang Nga Bay. Ko Lanta, roughly 35 nautical miles south of Phuket, has a laid-back atmosphere and excellent beaches on its western shore. Continuing south, the Trang Islands and ultimately Ko Lipe near the Malaysian border extend the cruising possibilities for those with two weeks or more.

Ko Lipe, sometimes called the Maldives of Thailand, sits in the Tarutao National Marine Park approximately 120 nautical miles south of Phuket. The passage south is a genuine offshore adventure, with overnight stops at Ko Muk and Ko Rok breaking the journey into manageable legs of 30 to 40 nautical miles.

Practical Matters for Sailing in Thailand

Charter Bases and Marinas

Phuket has three main marinas: Ao Po Grand Marina on the northeast coast, which is closest to Phang Nga Bay; Royal Phuket Marina on the east coast; and Phuket Yacht Haven on the north end. Ao Po Grand Marina is the most popular departure point for charter yachts heading to Phang Nga Bay and the Phi Phi Islands.

Local Culture and Etiquette

Thai culture places importance on respect and courtesy, and this extends to interactions ashore during your charter. Removing shoes before entering temples, dressing modestly when visiting religious sites, and greeting locals with a slight bow and hands pressed together are small gestures that are appreciated.

The seafood at waterfront restaurants on islands like Ko Yao Noi and Ko Lanta is exceptional and remarkably affordable. Expect to pay 200 to 500 Thai Baht (roughly $6 to $15 USD) for a fresh fish dinner that would cost five times as much in the Mediterranean.

Provisioning

Major provisioning should be completed in Phuket before departure. The island has large supermarkets with international products, plus fresh markets where fruit, vegetables, and seafood are abundant and inexpensive. Once you leave Phuket, provisioning options diminish quickly, though basic supplies and fresh fish are available on the larger islands.

Sailing the Andaman Sea from Phuket delivers an experience that balances natural spectacle with cultural immersion. The limestone karsts, hidden lagoons, and warm Thai hospitality create memories that outlast the tan lines, and the affordability of provisioning and shore-side dining makes this one of the best-value charter destinations in the world.