South Andaman offers a varied liveaboard diving region along Thailand’s Andaman coast, with itineraries visiting Koh Haa, Hin Daeng, Hin Muang and the Phi Phi Islands. Longer routes can extend farther south towards Koh Rok and Koh Lipe, combining remote offshore sites with island reefs and dramatic underwater landscapes.
Travelling by liveaboard allows divers to explore several parts of the southern Andaman Sea in one trip, with routes and dive sites varying depending on the itinerary and season.
South Andaman offers a varied mix of island reefs, coral gardens and remote offshore dive sites in Thailand. Liveaboard itineraries can combine Koh Haa, Hin Daeng, Hin Muang and Koh Rok, with longer routes travelling farther south towards the Koh Lipe and Tarutao area.
The diving varies considerably across the region. Koh Haa offers sheltered reefs, walls and underwater topography, while Hin Daeng and Hin Muang are exposed offshore pinnacles known for deeper walls and potentially stronger currents. This variety makes South Andaman suitable for itineraries combining relaxed reef diving with more challenging offshore dives.
The main liveaboard season in South Andaman generally runs from November to April, when sea conditions are typically more favourable for reaching remote offshore sites. Koh Haa can be accessible over a slightly longer season, but conditions and marine park access vary around the beginning and end of the season.
The southwest monsoon affects the Andaman coast during the middle of the year, bringing rougher seas and making exposed sites such as Hin Daeng and Hin Muang less suitable or inaccessible. Liveaboard schedules therefore concentrate mainly on the drier months.
Water temperatures are generally around 27–30°C during the main diving season. Visibility varies between locations, but around 20–30 metres is possible at offshore sites when conditions are favourable.
Conditions range from sheltered diving around islands such as Koh Haa to moderate or strong currents at exposed sites such as Hin Daeng and Hin Muang. These offshore pinnacles also extend well beyond recreational diving depths, so good buoyancy control and experience with currents and deeper diving can be important.
South Andaman supports a diverse mix of tropical reef and pelagic marine life. Divers can encounter barracuda, trevally, snapper, moray eels, turtles and nudibranchs, alongside colourful reef fish and a variety of smaller marine species.
The offshore sites Hin Daeng and Hin Muang are also known for possible encounters with manta rays and whale sharks. Sightings vary with season and conditions and are never guaranteed, but these larger species are one of the reasons the two sites feature prominently on South Andaman diving itineraries.
South Andaman liveaboard itineraries can depart from Phuket, with routes travelling south through areas such as Koh Haa, Hin Daeng, Hin Muang and Koh Rok. Longer itineraries may continue towards Koh Lipe and Tarutao National Park before returning north. Some South Andaman diving can also be accessed from Koh Lanta, so exact departure points and routes depend on the operator and itinerary.
Because conditions differ considerably between sheltered island reefs and exposed offshore pinnacles, divers should check the exact itinerary, required certification and experience level before choosing a trip. Weather, marine park access and seasonal conditions can also affect which dive sites are included.
The main liveaboard season in South Andaman generally runs from November to April, when sea conditions are typically more favourable for reaching offshore dive sites such as Koh Haa, Hin Daeng and Hin Muang.
Typical itineraries can include Koh Haa, Hin Daeng, Hin Muang and the Phi Phi Islands. Longer routes may also visit Koh Rok, Koh Lipe and the Tarutao area, depending on the itinerary and trip length. Actuele routes bevestigen dat die langere combinaties daadwerkelijk worden gevaren.
Many South Andaman liveaboards depart from Phuket, with itineraries travelling south towards Koh Haa, Hin Daeng and Hin Muang. Koh Lanta is also an important base for accessing these southern Andaman dive sites, so departure arrangements depend on the individual operator and itinerary.
Experience requirements vary between itineraries. Some sheltered reef sites can offer relatively relaxed diving, while exposed offshore sites such as Hin Daeng and Hin Muang can involve deeper diving and stronger currents and are better suited to experienced divers. Divers should always check the certification and experience requirements of their chosen liveaboard.
Water temperatures during the main diving season are generally around 28–30°C, although local conditions can vary between dive sites and throughout the season.
Manta rays and whale sharks are among the larger marine species that may be encountered in South Andaman, particularly around Hin Daeng and Hin Muang. Sightings vary with season and conditions and are never guaranteed.
