Seatopia, Thailand

The water temperature does range throughout the year, though always stays in a bracket between 27°-29°C; hence, always warm enough a long 3mm wetsuit might prove helpful for that much warmth requirement and for also saving yourself against scratches on reef or other harmful surfaces. Still, personal tolerance to temperature is different, and for some divers a shorty wetsuit or rash guard might be preferred in order to get more freedom of movement during warmer months. Wetsuits also protect the fragile dive equipment while packed in suitcases. Some Thailand liveaboards have wetsuit rentals available, but it's always best to bring your own to ensure the perfect fit and comfort

Liveaboards diving in Thailand really means diving on a variety of underwater landscapes: from dramatic rocky pinnacles and steep walls to sheltered coral reefs and sandy bays. The best destinations are generally considered the Similan Islands, Surin Islands, Phuket, Koh Phi Phi, and the Southern Andaman Sea-each of them having specific characteristics.

Some of these sites, such as Richelieu Rock in the Surin Islands, are famous for encounters with whale sharks, while Hin Daeng and Hin Muang off the Southern Andaman Sea regularly see mantas. Similan Islands can offer everything from swim-throughs and coral gardens to different marine life, making them a highlight for most Thailand liveaboard cruises.

While many sites are suitable for all levels, some locations experience strong currents or deeper depths, making them more appropriate for Advanced Open Water divers. Visibility varies from 10 to 40+ meters depending on factors such as tides, season, and weather conditions.

Open Water (or equivalent) certification along with at least 10 logged dives is the minimum requirement, though an Advanced Open Water certification is highly recommended to make the most of Thailand's vibrant coral reefs, large pelagics and deeper sites. This can often be completed aboard a liveaboard while seeing the best sites

The Andaman Sea, along the coast of Thailand, has warm water temperature throughout the year. Average monthly temperatures are in the range of 26-29°C. The coolest months are December to March with a little lower temperature at about 26°C. From April to November, it warms up to about 28°C - 29°C.

These warm waters do mean longer dive times, but multiple dives do result in some heat loss so a hood and/or thermal underwear is advised to keep certain divers warm. Some Thailand liveaboards offer wetsuit rental, but if you are susceptible to cold, a 5mm wetsuit would be better for some, especially on longer dive safaris

Some of these places are just simply not appropriate due to water depth and further factors related to currents and surfaces. In that regard, popular places include Thailand: Racha Yai and Racha Noi and also the Phi Phi Islands offer generally shallow reefs in tranquil conditions coupled with plentiful underwater life for maximum snorkeling gratification.

Snorkeling is not such a good idea over either Similan or Surin since either the currents are strong, or the reefs are deeper. In general, however, snorkeling is pretty good in areas with shallow reef off island beaches, and even non-divers could enjoy the vibrant corals and reef fish.

Most Thailand liveaboards offer snorkeling as an option for non-diving guests, although availability again depends on the itinerary. If snorkeling is a priority, it's best to check specific trip details in advance