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Shark Fin Reef, Koh Similan in Thailand

Located in the breathtaking waters of Phang-nga Province, Thailand, Shark Fin Reef is a must-visit dive site that caters to both beginner and advanced divers. With a maximum depth of 23 meters and excellent visibility of up to 18 meters, this dive site offers a captivating underwater experience.

Diving at Shark Fin Reef is a treat for all enthusiasts, thanks to its gentle granite rock formations that gradually descend into the depths. Whether you are a novice or an experienced diver, you can explore this site at any depth, making it an ideal choice for beginners.

The abundance of marine life at Shark Fin Reef is truly awe-inspiring. Every crevice is adorned with magnificent gorgonian coral and gigantic hard corals, creating a vibrant underwater landscape. Glassfish gracefully swim through the nooks and crannies, adding to the spectacle. Keep your eyes peeled for sightings of majestic stingrays and marble rays resting on the sandy ocean floor.

What sets Shark Fin Reef apart is its undeniable allure. Situated near Koh Payan, this dive site is approximately 500 meters away from Boulder City. It is renowned as one of the longest reefs in the Similan Islands and is predominantly frequented by safari boats departing from Phuket. Unlike other dive sites, Shark Fin Reef is relatively undiscovered, which enhances its appeal. The reef stretches from southeast to northwest, spanning from the surface to a depth of 30 meters. To assist divers, a descent rope marks the location near the small rocks breaking through the surface.

Marine enthusiasts will be delighted to encounter unique species at Shark Fin Reef. The elusive whitetip reef shark is commonly found in the depths, while the fascinating leopard shark gracefully roams the reef, often in shallower sections. Divers exploring this captivating site may also spot the rare Buffalohead Parrotfish, a distinctive and colorful underwater creature. As an added bonus, mantas occasionally grace Shark Fin Reef with their presence, providing a diverse array of marine life for all to witness.

Experience the wonders of Shark Fin Reef; a captivating dive site offering unforgettable encounters with a variety of marine species. Whether you are a beginner or an advanced diver, the beauty and serenity of Shark Fin Reef will undoubtedly leave you in awe.

Diving Conditions Score for Shark Fin Reef, Koh Similan in Thailand

6.4
Above Average

Decent conditions, proceed with caution.
The score is based on a calculation of the current weather and sea conditions.

Dive Site Overview for Shark Fin Reef, Koh Similan in Thailand

Depth

23m

Visibility

18m

Experience Level

beginner
advanced

Weather Conditions for Shark Fin Reef, Koh Similan in Thailand

Wave Height

1.24m

Wind Speed

20.6 m/s

Water Temp

29.3°C

Visibility

17.14km

Cloud Cover

94%

Wave Period

6.65s

Air Temperature

29.2°C

Precipitation

0 mm

Detailed 7-Day Diving Forecast for Shark Fin Reef
Alpha

Dive Score Chart for Shark Fin Reef

Best time to dive: 8:00 with score 6.523333333333334/10. Water conditions: Waves 1.36m, Wind 25.8 m/s.Best night dive time: 22:00 with score 6.123666666666667/10.

Chart showing hourly dive conditions including wave height, wind speed, water temperature, and visibility throughout the day.

Sunrise at Shark Fin Reef: 06:00
Sunset at Shark Fin Reef: 18:00

Optimal diving conditions at Shark Fin Reef are affected by daylight hours. Sunrise occurs at 06:00 and sunset at 18:00, which impacts visibility and water temperature for scuba diving and snorkeling.

🌞
Best Overall
8:00

Score: 6.5/10
Waves: 1.36m (6.05s), Wind: 25.8 m/s

🌙
Best Night
22:00

Score: 6.1/10
Waves: 1.24m, Wind: 23.6 m/s

Seasonal Analysis for Shark Fin Reef, Koh Similan in Thailand
Alpha

Historical patterns and best seasons for diving at Shark Fin Reef, Koh Similan in Thailand

The dive score combines all factors to rate overall diving conditions throughout the year. Higher scores indicate better diving conditions.

Monthly Dive Score Analysis - Seasonal Diving Conditions

Higher values indicate better diving conditions

Seasonal DiveScore Chart

This chart displays monthly diveScore data throughout the year, showing seasonal patterns. The data is presented as a bar chart with an overlaid line graph.Dive scores range from 1 to 10, with 10 being optimal conditions.

Higher values indicate better diving conditions

Best Season for Shark Fin Reef, Koh Similan in Thailand

Winter

Avg. Score: 10.0/10

Winter offers the best overall diving conditions with calmer seas and better visibility, despite cooler temperatures.

Best Months for Shark Fin Reef, Koh Similan in Thailand

January
Score: 10.0
February
Score: 10.0
March
Score: 10.0

Ideal Conditions for Shark Fin Reef, Koh Similan in Thailand

Water Temp

Thermometer Emoji

27.0°C / 80.6°F

August

Visibility

Telescope Emoji

11.0m / 36.1ft

January

Wave Height

Wave Emoji

1.6m / 5.2ft

April

Wave Period

Wave Emoji

8.0s

January

Seasonal Insights for Shark Fin Reef, Koh Similan in Thailand

Shark Fin Reef, Koh Similan in Thailand shows typical northern hemisphere patterns with May being the warmest month (28.1°C) and December the coldest (23.1°C). The calmest conditions typically occur in April with average wave heights of 1.6m and wave periods of 8.0s. The most comfortable wave conditions are in April with a low wave steepness ratio, creating gentler swells. January offers the longest wave periods (8.0s), creating more comfortable and predictable conditions for boat entries and exits. Ocean currents are slowest in January (0.5m/s) and strongest in January (0.5m/s). January is usually the driest month with 0.2mm of precipitation. For beginners, the best time to visit would be during April to June, when ocean conditions are calmer with long-period waves and currents are typically weaker. Experienced divers might enjoy the challenges and potentially better visibility during the shoulder seasons, with moderate currents that can improve marine life encounters.

Scoring Legend:
9-10 (Excellent)
7-8 (Good)
5-6 (Average)
3-4 (Poor)
1-2 (Dangerous)

Last updated: 1 min. ago - Jul 4, 2026

Note: This dive site is not a verified dive site. Please dive with caution. This dive site might have incorrect information by the community.

The closest dive destination to Shark Fin Reef is Koh Similan

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