Hello, divers! I’m Jaruda, and I’m excited to share a dive destination that’s still a well-kept secret in Thailand’s diving scene: Losin, the Lighthouse Island in the Sea. Tucked away in the Gulf of Thailand, this hidden gem is far less known than the Similan Islands, offering an exclusive underwater adventure for those in the know. If you’re eager to dive among whale sharks, manta rays, and vibrant coral reefs in a pristine, uncrowded setting, I highly recommend booking a 2025 Losin Thailand liveaboard with Giant Stride. Here’s why Losin is a dive you can’t miss and how to plan your trip.
Where is Losin, Thailand’s Secret Dive Spot?
Losin is a tiny, uninhabited island in the southern Gulf of Thailand. It is Thailand’s farthest island from the coast, located roughly 100 km east of Narathiwat. Unlike popular dive spots like Koh Tao or Koh Samui, Losin is a remote outpost surrounded by deep waters, accessible only by liveaboard. Its isolation keeps it off the radar of most divers, making it one of the most exclusive diving spots in Thailand. If you’re looking for a dive that feels like a true discovery, Losin is calling your name.
What Makes Losin So Special?
Losin is a stunning underwater pinnacle known as the Lighthouse Island in the Sea, famed for its high coral diversity and relatively healthy coral reefs. Its hard coral gardens are a vibrant mosaic of branching, table, and brain corals, creating a thriving habitat for marine life. Unlike crowded dive sites, Losin’s reefs remain in excellent condition due to limited diver traffic, offering a rare chance to explore a pristine underwater ecosystem. This hidden gem is a standout for divers seeking the best scuba diving in Thailand.
Marine Life Awaits at Losin
Losin is a hotspot for incredible marine encounters. From June to September, whale sharks and manta rays are frequent visitors, making it a top destination for the best whale shark diving in Thailand. Pelagic species like blacktip reef sharks, guitar sharks, eagle rays, large schools of barracudas, batfish, trevallies, and turtles add to the excitement. For macro enthusiasts, Losin offers nudibranchs, mantis shrimp, and harlequin shrimp hiding among the corals. Every dive here feels like uncovering a secret underwater world.

Diving Conditions at Losin
Losin’s diving conditions are as thrilling as they are rewarding. Expect warm waters (28–30°C or 82–86°F) and visibility that can reach 30 meters (100 feet) on clear days. However, moderate to strong currents and depths up to 36 meters (120 feet) make it best suited for experienced divers. The prime season for Losin Thailand liveaboard trips is June to September, when the seas are calmest. This remote, open-ocean setting adds an adventurous edge, but the payoff is a dive experience unlike any other in Thailand.
How to Reach Losin and Book Your Adventure
Losin’s remote location means liveaboards are the only way to dive this hidden gem, with most departing from Songkhla. You can fly into Hat Yai Airport, about an hour from the pier. Alternatively, take a train to Songkhla Train Station, less than 10 km from the pier, or a bus to Songkhla Provincial Bus Terminal, also nearby. Booking early is essential due to limited trips and high demand. I recommend Giant Stride for our deep knowledge of Thailand’s dive sites and seamless planning. Visit giantstridetravel.com to secure your spot.
2025 Losin Liveaboard Trips
Ready to dive Losin in 2025? Giant Stride offers exclusive liveaboard trips to this hidden gem, available only through their platform. Running from June to September, here are your options:
- Tapana Catamaran: The most well-known and longest-running liveaboard, featuring premium Omazz bedding for ultimate comfort. This 5-day, 4-night trip for up to 20 divers starts at 35,000 THB.
- Aquarian: A giant red liveaboard of Thailand, offering a 4-night trip that balances comfort and affordability, starting at approximately 29,000 THB.
- VELA Liveaboard: The newest liveaboard launching in 2025, providing a luxurious 5-day experience, starting at around 34,700 THB.
These trips are in high demand, so don’t wait. Book now at giantstridetravel.com to secure your place in this exclusive adventure.
Jaruda’s Recommendations for Diving Losin
As someone dedicated to sharing Thailand’s hidden dive treasures, I strongly recommend Losin, but it’s best for divers with experience. Here are my tips:
- Dive Level and Experience: Losin’s depth, currents, and open-ocean setting make it ideal for experienced divers. While Open Water certification is the minimum, I advise having an Advanced Open Water certification or at least 20 logged dives for confidence.
- Prepare for Remoteness: Losin is remote, and while some liveaboards claim to offer Wi-Fi, service is often unreliable. Before your trip, inform loved ones you’ll be offline, and prepare to disconnect—bring books, journals, or other offline entertainment.
- Eco-Friendly Practices: Losin’s healthy coral reefs are a treasure we must protect. Use reef-safe sunscreen and eco-friendly products to preserve this pristine ecosystem
Why Book with Giant Stride?
I trust Giant Stride to make your Losin adventure exceptional. Here’s why they’re the best choice: - Experts in Thailand Diving: Not sure about Losin? Giant Stride’s team is available 24/7 to answer any questions, from dive conditions to travel logistics. Check their Thailand dive guide for more insights.
- Free DAN Dive Insurance: Every booking includes complimentary DAN Dive Insurance, ensuring peace of mind on your dives.
- Best Prices Guaranteed: Get unbeatable rates on Losin liveaboards, exclusive to giantstridetravel.com.
- Eco-Conscious Partners: They work with liveaboards committed to protecting Losin’s delicate reefs.
- Personalized Planning: From booking to boarding, Giant Stride tailors every detail to your needs.
FAQ: Your Losin Dive Questions Answered
When is the best time to dive Losin?
June to September offers calm seas and excellent visibility, perfect for liveaboard trips.
Is Losin suitable for beginner divers?
Due to its depth and currents, Losin is ideal for experienced divers. Aim for Advanced Open Water or a solid dive log.
What marine life can I see at Losin?
Look for whale sharks, manta rays, blacktip reef sharks, guitar sharks, eagle rays, barracudas, batfish, trevallies, turtles, nudibranchs, mantis shrimp, and harlequin shrimp.
How should I prepare for Losin’s remoteness?
Bring offline entertainment and use reef-safe products. Check your gear, as there’s no dive shop on-site.
Discover Losin’s Hidden Wonders with Giant Stride
Losin, Thailand’s farthest dive gem, is a secret paradise of vibrant coral reefs and incredible marine life, from whale sharks to tiny harlequin shrimp. Few divers know of this extraordinary destination, but those who visit return with stories of awe. I highly recommend making Losin your next dive adventure. Book your 2025 Losin Thailand liveaboard with Giant Stride to experience this rare wonder before it’s discovered by the masses. Visit giantstridetravel.com today—spots are limited, so don’t miss out