Diving in Gulf of Thailand

Explore 90 dive sites in Gulf of Thailand, Thailand. Ocean conditions, marine species, and dive centres.

Best Time to Dive in Gulf of Thailand

The warmest water temperatures in Gulf of Thailand occur in January, averaging 28.2°C. The coolest conditions are in December at 28.2°C.

Monthly Water Temperatures

  • January: 28.2°C (air: 26.9°C)
  • February: 28.2°C (air: 27.3°C)
  • March: 28.2°C (air: 28.2°C)
  • April: 28.2°C (air: 29.1°C)
  • May: 28.2°C (air: 29.1°C)
  • June: 28.2°C (air: 28.6°C)
  • July: 28.2°C (air: 28.1°C)
  • August: 28.2°C (air: 28.2°C)
  • September: 28.2°C (air: 27.6°C)
  • October: 28.2°C (air: 27.2°C)
  • November: 28.2°C (air: 27.0°C)
  • December: 28.2°C (air: 26.8°C)

Marine Life in Gulf of Thailand

Home to 167 recorded species including 126 reef fish, 18 hard corals, 7 sharks & rays, 6 seagrass & algae, 2 sea cucumbers, 2 clams & mussels.

Dive Site Difficulty in Gulf of Thailand

Gulf of Thailand has 48 beginner, 3 intermediate dive sites - suitable for divers of all levels.

Recommended Packing List for Gulf of Thailand

Based on average water temperature of 28.2°C.

  • Shorty or Rashguard - warm 28°C water needs minimal exposure protection
  • Mask - essential for every dive
  • Fins
  • BCD - buoyancy compensator
  • Regulator - your most safety-critical piece of gear
  • Dive Computer - tracks depth, time, and NDL
  • Surface Marker Buoy (SMB) - essential for boat pickups
  • Dive Torch - useful for crevices and colour at depth
  • Underwater Camera - capture your diving memories

Marine Protected Areas in Gulf of Thailand

  • Muko Ang Thong - Marine National Park (IUCN Category II)
  • Laem Son - Marine National Park (IUCN Category II)
  • Hat Wanakon - Marine National Park (IUCN Category II)
  • Biosphere Reserves Ranong Thailand - UNESCO-MAB Biosphere Reserve (IUCN Category Not Applicable)
  • Mu ko Chumphon - Marine National Park (IUCN Category II)
  • Lam Nam Kra Buri - Marine National Park (IUCN Category II)
  • Kaper Estuary - Laemson Marine National Park - Kraburi Estuary - Wetland of International Importance (Ramsar Site) (IUCN Category VI)
  • Mu Ko Ang Thong Marine National Park - Wetland of International Importance (Ramsar Site) (IUCN Category VI)
  • Suratthani Environmental Protected Area - Environmental Protected Area (IUCN Category VI)
  • Mu ko Ranong - Marine National Park (IUCN Category II)
  • Ko Phayam Marine and Coastal Resources Protected Area - Marine and Coastal Resources Protected Area (IUCN Category VI)

Getting to Gulf of Thailand - Nearest Airports

  • Samui International Airport (USM), Na Thon (Ko Samui Island) - 73 km away, approx 94 min travel time
  • Krabi International Airport (KBV), Krabi - 240 km away, approx 276 min travel time
  • Phuket International Airport (HKT), Phuket - 272 km away, approx 312 min travel time

Dive Sites

Dive Centres

Frequently Asked Questions

What are the typical diving conditions like in the Gulf of Thailand, including water temperature and visibility?
The Gulf of Thailand offers consistently warm waters, with the best water temperatures recorded at 28.16°C during Month 1, Month 2, and Month 3. While specific visibility data is not provided, the region is known for its accessible diving. Divers can generally expect comfortable conditions for exploring the numerous dive sites.
What kind of marine life can divers expect to see in the Gulf of Thailand?
Divers in the Gulf of Thailand can look forward to encountering green turtles, which are commonly seen across the region. There are also exciting opportunities for whale shark encounters, particularly at renowned sites like Sail Rock. The area's many reef sites also host a variety of vibrant reef fish and invertebrates.
Which are considered the best dive sites in the Gulf of Thailand for recreational divers?
For recreational divers, Sail Rock is highly regarded for its potential whale shark encounters and vibrant marine life. The Mu Koh Angthon National Marine Park, along with areas around Koh Samui and Koh Phangan, offer accessible diving. Other popular beginner-friendly sites include White Rock Koh Tao and Chumphon Pinnacle.
Is the Gulf of Thailand suitable for beginner divers, or is it more for experienced divers?
The Gulf of Thailand is exceptionally suitable for beginner divers, offering a wealth of accessible dive sites. Many locations, such as White Rock Koh Tao, Jansom Bay, and Crystal Bay Koh Samui, are specifically rated for beginners. While there are also intermediate sites like Coral Reef, the region is very welcoming for those new to diving.
What is the best time of year to go diving in the Gulf of Thailand?
The best time to go diving in the Gulf of Thailand, based on water temperature, is during Month 1, Month 2, and Month 3, when temperatures consistently reach 28.16°C. These months typically offer the most comfortable and enjoyable diving conditions. For more detailed seasonal information, consult our When to Dive guide.
How do seasonal weather patterns affect diving conditions and visibility in the Gulf of Thailand?
The provided data does not contain specific information on how seasonal weather patterns affect diving conditions and visibility in the Gulf of Thailand. Therefore, we cannot provide details on this topic based solely on the given context.
What are the chances of seeing whale sharks or other large pelagic marine life in the Gulf of Thailand?
The chances of seeing whale sharks in the Gulf of Thailand are notable, especially at dive sites like Sail Rock, which is known for these encounters. While specific probabilities are not provided, these majestic creatures are a highlight for many divers in the region. You can learn more about marine species in our wildlife database.
What are the common ways to get to the main diving areas in the Gulf of Thailand?
The provided data does not include information regarding the common ways to get to the main diving areas in the Gulf of Thailand. Therefore, we cannot detail transportation methods based on the given context.