Siam Bay, Phuket in Thailand
Diving in Siam Bay is a treat for the senses, as the extensive coral beds showcase a vibrant array of marine life. Divers will be delighted by the colorful damsels, butterflyfish, snappers, and vibrant coral formations. Keep an eye out for majestic sea turtles gracefully gliding through the waters. Additionally, schools of Yellowfin Snappers and large groupers add to the diversity of marine species found here.
With a visibility of 13m and a maximum depth of 15m, Siam Bay is perfect for beginner divers. Its close proximity to ATM and the Phuket Province provides easy access for divers to conveniently enjoy this remarkable dive site.
Optimize your diving experience in Thailand by exploring the wonders of Siam Bay.
Diving Conditions Score for Siam Bay, Phuket in Thailand
Decent conditions, proceed with caution.
The score is based on a calculation of the current weather and sea conditions.
Dive Site Overview for Siam Bay, Phuket in Thailand
Depth
15m
Visibility
13m
Experience Level
Weather Conditions for Siam Bay, Phuket in Thailand
Wave Height
1.38m
Wind Speed
10 m/s
Water Temp
29.7°C
Visibility
15km
Cloud Cover
57.5%
Wave Period
5.65s
Air Temperature
20°C
Precipitation
0 mm
Dive Score Chart for Siam Bay
Best time to dive: 6:00 with score 6.806666666666667/10. Water conditions: Waves 1.38m, Wind 10 m/s.Best night dive time: 0:00 with score 6.306666666666667/10.
Chart showing hourly dive conditions including wave height, wind speed, water temperature, and visibility throughout the day.
Optimal diving conditions at Siam Bay 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.
Score: 6.8/10
Waves: 1.38m (8s), Wind: 10 m/s
Score: 6.3/10
Waves: 1.38m, Wind: 10 m/s
Seasonal Analysis for Siam Bay, Phuket in ThailandAlpha
Historical patterns and best seasons for diving at Siam Bay, Phuket 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 Siam Bay, Phuket in Thailand
Winter
Winter offers the best overall diving conditions with calmer seas and better visibility, despite cooler temperatures.
Best Months for Siam Bay, Phuket in Thailand
Ideal Conditions for Siam Bay, Phuket in Thailand
Water Temp
27.2°C / 81.0°F
August
Visibility
10.4m / 34.1ft
January
Wave Height
2.0m / 6.6ft
November
Wave Period
8.0s
January
Seasonal Insights for Siam Bay, Phuket in Thailand
Siam Bay, Phuket in Thailand shows typical northern hemisphere patterns with May being the warmest month (28.4°C) and December the coldest (23.0°C). The calmest conditions typically occur in November with average wave heights of 2.0m and wave periods of 8.0s. The most comfortable wave conditions are in November 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 0.1mm of precipitation. For beginners, the best time to visit would be during November to January, 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.
Last updated: 8 hr. ago - Jul 3, 2026