Koh Bon (West Ridge) is a shore dive site in Phang Nga, Thailand. Typically most favorable Dec–Jan · from 3 years of archive data. Recent reports put the water around 30°C (85°F). Check the latest conditions and entry details before you go.
Tap a factor for its source and model point · Forecast 30°C · seasonal avg 29°C
Dive windows this week
Best: SatFavorable windowModerate window— no window
First light 5:56 · Sunrise 6:19 · Sunset 18:51
Source: Open-Meteo marine · model point 4.0 km from site · graded 5h ago
Forecast only — always assess conditions on site.
Dated firsthand observations from divers — not current conditions.
No diver reports for this site yet. — one dated observation helps every diver after you.
What conditions have historically been typical at this site, month by month — not a forecast.
January, March, April, and December havetypically had the largest share of favorable days here. Conditions vary year to year — this is historical context, not a forecast.
Based on 3 years of archive data. Bar height shows the share of days each month whose conditions have historically scored favorably.
Recorded observations — evidence of past sightings, not a promise of what you’ll encounter.
Mobula birostris recorded here Jan–Apr (14 records)
most recent 2016
Cheilinus undulatus recorded here Feb–Mar (3 records)
most recent 2016
Aulostomus maculatus recorded here Mar (2 records)
most recent 2016
Balistoides viridescens recorded here Feb–Mar (2 records)
most recent 2016
Gymnothorax javanicus recorded here Jan, Mar (2 records)
most recent 2016
Heniochus acuminatus recorded here Mar (2 records)
most recent 2016
Mobula alfredi recorded here Mar (2 records)
most recent 2016
Odonus niger recorded here Mar (2 records)
most recent 2016
Counts are occurrence records near this site from public biodiversity datasets (GBIF), grouped by calendar month across all sampled years. Sightings vary — past records are context, not a prediction.
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No description for this site yet — divers who know it can suggest one below.
No hazards recorded for this site yet — that never means there are none. Ask a local operator before you dive.
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