Whale Shark
The Ultimate Whale Shark Diving Guide in Chumphon
Get to know Whale Shark
Despite growing up to 12 meters or more, these “Gentle Giants” are completely harmless filter-feeders that subsist entirely on microscopic plankton and small fish. They are naturally docile, curious, and remarkably trusting creatures. Every single whale shark carries a completely unique arrangement of pale yellow spots and stripes behind its gills. Because no two sharks have the exact same markings, these patterns act just like a human fingerprint, allowing marine biologists—and our dive team—to identify individual sharks, track their growth, and catalog their migration history.
Area, Habitat, and Population
The whale sharks visiting Chumphon belong to a transient, migratory population that traverses the Gulf of Thailand. They are drawn to our specific offshore waters due to deep-water upwellings that push massive concentrations of nutrients toward our isolated pinnacles. While islands like Koh Tao face immense diving traffic, Chumphon remains an uncrowded hidden gem. This low-density diving environment provides a stress-free habitat for the sharks, encouraging them to linger closer to our dive groups and remain in our marine ecosystem for longer periods of time.
When to see whale sharks
Our logs show whale sharks from March to October, with the 2025 peak in August-September. Whale sharks are wild animals, so we never promise a sighting. Whale sharks feed on plankton and small fish, and they follow their food. That makes their visits hard to predict: where and when they show up changes from week to week. We keep a log of the whale sharks we see on our trips, so message us before you book and we’ll tell you what we’ve been seeing lately. If a whale shark is high on your list, plan more than one day of diving. More dives give you more chances. On days without one, you’re still diving quiet reefs and wrecks in Mu Ko Chumphon National Park, with very few other divers around. When a whale shark does appear, we give it space. We don’t touch it, chase it or block its path, and we keep a calm distance so it stays relaxed and you get a better look.
Our season runs from February to October. In 2027 we open on Sunday 14 February.
Featured Prime Dive Sites
HTMS Prab Wreck
A historic, decommissioned military shipwreck transformed into a thriving artificial reef ecosystem. It is a awe-inspiring sight to watch a massive whale shark glide over it.
- Spectacular Artificial Reef
- Historic Military Shipwreck
- High-Nutrient Feeding Station
Hin Lak Ngam
Our deep site: black rock pinnacles from 11 to 29 m, dived on a down line. For Advanced divers.
- Ultimate Vertical Pinnacle Site
- Striking Underwater Topography
- Absolute Whale Shark Favorite
Hin Pae
A shallower, sprawling reef structure bathed in gorgeous natural light. An ideal backdrop for underwater photographers looking to capture the whale sharks over the corals.
- Extended Shallow Sightings
- Perfect Natural Photography Light
- Extended Shallow Sightings
Encounters Guidelines
Whale Shark Photo Guide
Every whale shark carries a completely unique pattern of spots—just like a human fingerprint. By taking a proper identification photo during your dive, you help our team track and recognize individual sharks.
1. Target the ID Zone
Aim your camera at the side of the shark. The critical “fingerprint” area is the flank directly behind the gills and above the pectoral fin. While the left side is the global standard, clear photos of either side are highly valuable.
2. Shoot Level and Flat
Try to capture the photo directly from the side at a 90-degree angle, rather than from above or below. Avoid angles that distort the spot patterns, as flat profiles allow mapping programs to read the markings accurately.
3. Note the Match
Keep track of your dive details. Note down the Date, Time, and Dive Site of your encounter. You can share your photos directly with our divemaster on the boat to help us update our live Sighting Log!
Sighting Log
| Date | Time | Dive Site |
|---|---|---|
| 5/4/25 | 1600HRS | Koh Ran Ped |
| 9/4/25 | 1230HRS | Hin Pae |
| 8/5/25 | 1100HRS | Sam Laem |
| 6/6/25 | 1330HRS | HTMS Prab |
| 24/6/25 | 1510HRS | Ngam Yai |
| 25/6/25 | 1100HRS | Hin Chedi |
| 13/7/25 | 1000HRS | Sam Laem |
| 17/7/25 | 1400HRS | Ngam Noi |
| 28/7/25 | 1530HRS | Hin Pae |
| 30/7/25 | 1215HRS | Hin Pae |
| 31/7/25 | 1300HRS | Hin Lak Ngam |
| 2/8/25 | 1300HRS | Ngam Noi |
| 4/8/25 | 1030HRS | Sam Laem |
| 8/8/25 | 1140HRS | Hin Pae |
| 10/8/25 | 1520HRS | HTMS Prab |
| 18/8/25 | 1220HRS | Hin Pae |
| 16/8/25 | 1230HRS | HTMS Prab |
| 17/8/25 | 1210HRS | HTMS Prab, Ngam Noi |
| 28/8/25 | 1230HRS | HTMS Prab, Ngam Noi |
| 31/8/25 | 1530HRS | HTMS Prab |
| 6/9/25 | 1330HRS | Hin Pae |
| 7/9/25 | 1330HRS | HTMS Prab, Ngam Noi |
| 8/9/25 | 1240HRS | Ngam Noi East |
| 11/9/25 | 1510HRS | HTMS Prab, Ngam Noi |
| 13/9/25 | 1225HRS | HTMS Prab |
| 27/9/25 | 1320HRS | Ran Ped |
| 28/9/25 | 1100HRS | Ngam Noi |
| 12/10/25 | 1220HRS | Hin Pae |
