FAQs · Destination Guide
Quiet national park islands now, Koh Tao pinnacles next
Frequently Asked Questions
Quick answers sourced from research and local operating patterns.
For the most reliable day-boat conditions, plan for February through September. Seas are often calmer, water stays warm around 28°C to 30°C, and operators can reach a wider mix of reef and wreck sites. October through January is the trickiest period because the northeast monsoon can bring wind and chop that cancels boats and ferries. If you visit in monsoon season, build buffer days and be ready to swap deeper sites for more sheltered island reefs.
Snorkeling is easiest when the surface is calm and the water is clearer, which is often February through May and again in July through September. Many reefs are shallow, roughly to , so even small chop can make it tiring and reduce visibility. In October through January, wind-driven waves can limit safe snorkeling, especially for weaker swimmers. Go early in the morning, use a snorkel vest, and choose sheltered coves with your guide.
You have three main options. The fastest is flying from Bangkok (commonly Don Mueang, DMK) to Chumphon Airport (CJM), then transferring about 35 km into town or to the ferry corridor. The classic budget option is an overnight train on the Southern Line to Chumphon station. Buses and private vans also run the route. If you are connecting onward to islands, compare arrival times with ferry schedules and avoid tight same-day connections in Oct to Jan.
Chumphon is one of the quickest mainland gateways to Koh Tao. High-speed ferries (commonly Lomprayah services) depart from the Thung Makham Noi corridor piers and run to Koh Tao, with some routes continuing to Koh Phangan and Koh Samui. Book ahead during weekends and Thai holidays, and arrive early for check-in and baggage tagging. In rougher months (often Oct to Jan), seas can cancel crossings, so keep your schedule flexible and avoid booking a dive course that starts the same day you arrive.
Yes. Most island visits, snorkeling trips, and many dive itineraries in the park involve the Mu Ko Chumphon National Park entrance fee. Typical posted rates are THB 200 per adult foreign visitor (THB 100 child) and THB 40 per adult Thai visitor (THB 20 child), usually structured as a daily entry. Some operators include the fee in their package, while others collect it separately. Keep your receipt, as park authorities may request it for inspection.
Standouts include Ko Ngam Yai and Ko Ngam Noi for coral slopes and cave-like features, plus the HTMS Prab 741 wreck, an artificial reef dive with a max depth around 24 m. On good days, these sites can deliver sea fans, soft coral, black coral habitats, schooling fish, and the occasional turtle. If you add a Koh Tao extension, Chumphon Pinnacle offers a deeper profile (top around 14 m) and stronger chances of big schooling action. Sail Rock is another classic pinnacle reachable via the islands when conditions align.
Yes, especially if you want a quieter environment than the busiest islands. Many local dives focus on island reefs and protected areas that work well for Open Water training and first fun dives, with typical profiles starting shallow around 5 m and gradually going deeper. Operators such as Sensui Dive offer PADI training and guided trips. The key is season choice: aim for calmer months (often Feb to Sep), and be conservative during the northeast monsoon when waves can stress new divers and reduce site options.
For suspected decompression illness, treat it as urgent: stop diving, give oxygen if available, and contact a diving emergency service. The SSS Recompression Chamber Network lists 24/7 emergency contacts for Koh Tao (+66 81 081 9777) and Koh Samui (+66 81 081 9555), which are key regional resources in the Gulf. Your operator may coordinate evacuation depending on conditions and case severity. Also call Thailand's medical emergency number 1669 and your dive insurance hotline as soon as possible.
Prioritize sun, boat, and reef protection. Bring a rashguard or 3mm suit for water around 28°C to 30°C, plus reef-safe sunscreen, a hat, and a reusable bottle. Divers should carry an SMB, whistle, and a dive computer. A small light is useful for shaded caves and under ledges. For ferries and longtail boats, pack a dry bag and a light layer for air-conditioned cabins. Add insect repellent for mangroves and evening walks.
Three days is the minimum for one full ocean day: arrive, do a national park dive or snorkel day, then enjoy a beach or market morning before you leave. Five to seven days is ideal if you want multiple island days plus a Koh Tao extension for pinnacles or freedive training. In monsoon months (often Oct to Jan), add at least one buffer day because boat and ferry cancellations can disrupt tight schedules. Chumphon rewards slow travel, so leaving room for weather swaps pays off.