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

Koh Tao in July

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

Season
Off peak
Water
30 °C
Visibility
29 m
Waves
0.7 m
Species likely
397
Best sites for July JuneAugust
Koh Tao from Sentinel-2, 1 December 2025 · Contains modified Copernicus Sentinel data 2025; depth contours approximate (NOAA ETOPO 2022)
July at a glance

What July 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
July · Off peakOutside the best months (Mar-May)

Surface 30 °C, at depth 30 °C, visibility 29 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 July

Best dive sites in Koh Tao in July.

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

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

  1. 01Chumpon Pinnacle29 m viz · 30 °C · Advanced · 12-45 m8.3
  2. 02HTMS Sattakut29 m viz · 30 °C · Advanced · 18-31 m8.0
  3. 03White Rock29 m viz · 30 °C · Open Water · 2-26 m7.9
  4. 04Twins29 m viz · 30 °C · Beginner · 5-25 m7.8
  5. 05Aow Tanote30 m viz · 30 °C · Beginner · 2-20 m7.7
  6. 06Hin Ngam28 m viz · 30 °C · Beginner · 3-16 m7.7

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) Dan Schofield, some rights reserved (CC BY), via Wikimedia Commons (CC BY 4.0) · (c) Jan Ebr & Ivana Ebrová, 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) Jan Ebr & Ivana Ebrová, some rights reserved (CC BY), via iNaturalist (CC BY) · (c) Kat Lim, some rights reserved (CC BY), via iNaturalist (CC BY) · Amada44, via Wikimedia Commons (CC BY SA 3.0) · H. Schlegel, via Wikimedia Commons (PD), Doublebar Rabbitfish, taken elsewhere · (c) ig: underwater.logs, some rights reserved (CC BY), via iNaturalist (CC BY) · (c) luluchouette, some rights reserved (CC BY), via iNaturalist (CC BY) · (c) Gonzalo Ganda Álvarez, some rights reserved (CC BY), via iNaturalist (CC BY) · (c) Shane Austin, some rights reserved (CC BY), via iNaturalist (CC BY).

What you'll see in July

Wimple Fish on 18% of dives.

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

Also likely in July 393 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

Turn every dive into ocean science

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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What happens to one sighting
A mobula ray swimming in open blue water, a remora on its back
Mobula rayMobula sp.15 m · Princess Alice Bank, Azores
  1. You log itWhat you saw, from your dive computer file or by hand.
  2. We check itPinned to the dive site and matched to a scientific name.
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What scientists need, and how you help

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