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

Koh Tao in March

March is peak season in Koh Tao. Expect water around 29 °C at the surface and 29 °C at depth, with about 23 m of visibility.

Season
Peak season
Water
29 °C
Visibility
23 m
Waves
0.5 m
Species likely
366
Best sites for March FebruaryApril
Koh Tao from Sentinel-2, 1 December 2025 · Contains modified Copernicus Sentinel data 2025; depth contours approximate (NOAA ETOPO 2022)
March at a glance

What March 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
March · Peak seasonOne of the best months here

Surface 29 °C, at depth 29 °C, visibility 23 m, waves about 0.5 m.

Peak seasonBest: April, May

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

Where to dive in March

Best dive sites in Koh Tao in March.

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

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

  1. 01Chumpon Pinnacle24 m viz · 29 °C · Advanced · 12-45 m8.1
  2. 02HTMS Sattakut23 m viz · 29 °C · Advanced · 18-31 m7.5
  3. 03Southwest Pinnacle22 m viz · 29 °C · Advanced · 4-40 m7.5
  4. 04Aow Tanote23 m viz · 29 °C · Beginner · 2-20 m7.3
  5. 05Sail Rock20 m viz · 29 °C · Open Water · 0-40 m7.3
  6. 06Hin Ngam22 m viz · 29 °C · Beginner · 3-16 m7.2

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

What you'll see in March

Unidentia aliciae on 6% of dives.

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

Also likely in March 362 species · chance per dive

Other months

Peak season: 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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