Satellite view of Koh Tao with approximate depth contours every 10 m

Koh Tao in August

August is outside the peak season in Koh Tao (best: Mar-May). Expect water around 30 °C at the surface and 29 °C at depth, with about 26 m of visibility.

Season
Off peak
Water
30 °C
Visibility
26 m
Waves
0.7 m
Species likely
383
Best sites for August JulySeptember
Koh Tao from Sentinel-2, 1 December 2025 · Contains modified Copernicus Sentinel data 2025; depth contours approximate (NOAA ETOPO 2022)
August at a glance

What August is like in Koh Tao.

Month grade from logged dives across 23 sites: visibility, sea state and sightings. Tap a month to compare.

Divegrade month grade, 0 to 10Best monthsOther months
August · Off peakOutside the best months (Mar-May)

Surface 30 °C, at depth 29 °C, visibility 26 m, waves about 0.7 m.

Peak seasonBest: March, April, May

Compare Koh Tao in March or see the whole year on the Koh Tao page.

Where to dive in August

Best dive sites in Koh Tao in August.

Ranked by Divegrade score for August. Each line shows the site's August conditions where divers have logged them.

Interactive map loads here. Every site on it is also listed on this page.

  1. 01Chumpon Pinnacle27 m viz · 30 °C · Advanced · 12-45 m8.3
  2. 02HTMS Sattakut26 m viz · 30 °C · Advanced · 18-31 m7.9
  3. 03White Rock26 m viz · 30 °C · Open Water · 2-26 m7.7
  4. 04Hin Ngam26 m viz · 30 °C · Beginner · 3-16 m7.6
  5. 05Twins26 m viz · 30 °C · Beginner · 5-25 m7.6
  6. 06Aow Tanote27 m viz · 30 °C · Beginner · 2-20 m7.5

Site list photos: (c) portioid, some rights reserved (CC BY), via iNaturalist (CC BY) · Leonard Low from Australia, via Wikimedia Commons (CC BY 2.0), Moon wrasse, taken elsewhere · (c) Jan Ebr & Ivana Ebrová, some rights reserved (CC BY), via Wikimedia Commons (CC BY 4.0) · (c) Dan Schofield, some rights reserved (CC BY), via Wikimedia Commons (CC BY 4.0) · (c) Jean Jacques Godon, some rights reserved (CC BY), via iNaturalist (CC BY) · (c) ig: underwater.logs, some rights reserved (CC BY), via iNaturalist (CC BY) · (c) Jan Ebr & Ivana Ebrová, some rights reserved (CC BY), via iNaturalist (CC BY) · Amada44, via Wikimedia Commons (CC BY SA 3.0) · (c) Kat Lim, some rights reserved (CC BY), via iNaturalist (CC BY) · (c) Shane Austin, some rights reserved (CC BY), via iNaturalist (CC BY) · (c) Gonzalo Ganda Álvarez, some rights reserved (CC BY), via iNaturalist (CC BY) · (c) luluchouette, some rights reserved (CC BY), via iNaturalist (CC BY) · H. Schlegel, via Wikimedia Commons (PD), Doublebar Rabbitfish, taken elsewhere.

What you'll see in August

Doublebar Rabbitfish on 19% of dives.

Chance per dive in August across all sites here, from sightings in logged dives.

Also likely in August 379 species · chance per dive

Other months

Peak season: March, April, May.

All 23 dive sites in Koh Tao

More places to dive

Pair it, or trade up.

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Citizen science

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The ocean covers 70% of the planet but is the least-recorded place on Earth. Scientists can't be on every reef. Divers are.

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A mobula ray swimming in open blue water, a remora on its back
Mobula rayMobula sp.15 m · Princess Alice Bank, Azores
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