Koh Ha

Krabi, Thailandcave30 m maxadvanced

Conditions & tides

Koh HaKrabi

Good · 5/5

conditions visualisation

Good5/5

Calm and diveable right now — best window today 7 AM–5 PM.

Wind4 kn NE

Current~0 kn SW · model

Swell

0.1 m · 2s · SE

Water

31 °C

Max depth

30 m

Conditions through the day

6 AM6 PM

Calmest current near slack — 04:30 PM & 05:00 AM local

Sunrise 06:15 AM · Sunset 06:02 PM local

Show details

Tide · local

Outlook — select a day for full conditions

On-face swell 0.1 m — the component of the swell aimed at this site’s exposed face. Current is a regional model value (Copernicus, ~9 km grid) — a guide to the area, not a precise reef measurement. Imagery © Esri · not depth or visibility.

Scored by DiveConnect's site-physics model

Marine forecast via Copernicus Marine. Score is a rule-based guide from swell/wind vs. the site's exposure — always dive your own assessment.

Dived here today? How were conditions vs. what we showed?

About this site

Koh Ha is a group of five small islands, about 30 nm southeast of Phuket in the Andaman Sea. The name means five in Thai. The islands are separated by channels over 50 metres deep and jut straight out of the sea, and the water here is very clear, with visibility usually exceeding 20-30 metres.

The highlight is two caves or caverns on the largest island, Ko Ha Yai. The entrances are large and there is only one way in and out. Divers can surface inside the island and look up at rock formations hanging from the ceiling, with light filtering in through the water from the entrance.

Whale sharks have been seen around Koh Ha, and the site is regarded as excellent for macro life, including ghost pipefish.

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