Koh Samui is one of the best departure points for sailing in the Gulf of Thailand. Several marinas, a diverse fleet for any budget, and remarkable anchorages scattered throughout the surrounding waters — from the Ang Thong archipelago to legendary Koh Tao — make yacht chartering here a compelling choice. It lets you explore at your own pace, free from ferry timetables and group-tour schedules.

Yacht Types and Charter Formats

Monohulls (keelboats) — classic sailing yachts of 35–55 feet. More stable in a swell, better upwind performance, and generally slower. Well suited to multi-day passages with overnight stops.

Catamarans — wide, stable platforms with generous deck space. Faster than a monohull in a beam reach, gentler roll in side swell. Popular with families and larger groups. Shallower draft allows entering smaller bays and anchorages.

Motor yachts — maximum comfort and speed but significantly higher fuel costs. Best for short day trips where covering distance quickly matters more than sailing experience.

Charter formats: bareboat (yacht without crew — you skipper, an RYA Day Skipper qualification or equivalent is required), skippered charter (professional captain handles sailing — you relax), cabin charter (you take one or two cabins on a shared yacht with other guests; captain and itinerary are common).

Best Routes from Koh Samui

Ang Thong Marine National Park — an archipelago of 42 islands 40 km west of Samui. Emerald lagoons, limestone karsts, sea caves and clear tropical water. A one- or two-day route; a park entry permit is required (usually included in organised tour packages).

Koh Phangan — the neighbouring island 20 km north. Calm bays on the eastern and southern coasts, including Thong Nai Pan and Haad Yao. An excellent overnight anchorage.

Koh Tao and Koh Nang Yuan — 70 km north. World-class diving, crystal-clear water, dramatic rocky scenery. Typical passage from Samui: about 7–9 hours under sail or 3–4 hours under engine.

Small islands near Samui — Koh Matsum, Koh Tan, Koh Wao. Quiet bays, snorkeling, deserted beaches — reachable in a day trip.

Documentation Requirements

For bareboat charter (skippering yourself) most companies require a sailing logbook and a recognised certificate — at minimum RYA Competent Crew or RYA Day Skipper, or an international equivalent. No experience? Choose skippered. Additional paperwork in Thailand: passports of all crew members, and a park entry permit for Ang Thong waters.

Seasonality and Weather

The best sailing season around Samui is December through April: steady 10–20 knot breeze, moderate swell, good visibility. May through October brings the south-west monsoon — frequent squalls and uncomfortable seas. November is transitional with storms; many operators limit overnight passages to routes within Samui's sheltered waters.

Tips for Choosing a Charter Company

  • Ask about the yacht's age and date of last safety inspection.
  • Confirm there is a full safety kit on board (EPIRBs, life rafts, flares).
  • For bareboat, verify collision insurance and passenger liability coverage.
  • Clarify whether park permits, marina fees and fuel are included or billed separately.
  • Read reviews focusing on how the company handles emergencies, not just fair-weather reports.