Koh Samui Scuba Dives Ranked by Seasickness Risk

Short answer: Start with Koh Tao Scuba Diving Tour from Koh Samui: 2 Dive Sites and Lunch (Oh-Hoo); Koh Tao and Sail Rock Full Day Scuba Diving from Koh Samui (Siam Scape Journeys). Their listings describe the calmest water or most stable boats. Our score is an estimate from the listing text. Updated 2026-11-02

We scored 2 scuba dives in Koh Samui from their listings. None of the 2 tours scores 2 or lower on our 1–5 seasickness risk scale. The calmest options are Koh Tao Scuba Diving Tour from Koh Samui: 2 Dive Sites and Lunch (Oh-Hoo); Koh Tao and Sail Rock Full Day Scuba Diving from Koh Samui (Siam Scape Journeys).

This score is our estimate from the listing’s description, not an operator figure. How we score.

TourSeasickness riskOperatorFrom
Koh Tao Scuba Diving Tour from Koh Samui: 2 Dive Sites and Lunch
“Please note that the boat used for this activity will either be a speedboat or a catamaran, depending on weather conditions.”
 4/5Oh-Hoo$108Check dates
Koh Tao and Sail Rock Full Day Scuba Diving from Koh Samui
“Please note that the boat used for this activity may be a speedboat or catamaran, depending on weather and sea conditions.”
 4/5Siam Scape Journeys$108Check dates

Questions

Which scuba dive in Koh Samui is best if I get seasick?

Start with Koh Tao Scuba Diving Tour from Koh Samui: 2 Dive Sites and Lunch (Oh-Hoo); Koh Tao and Sail Rock Full Day Scuba Diving from Koh Samui (Siam Scape Journeys). Their listings describe the calmest water or most stable boats. Our score is an estimate from the listing text.

How up to date is this information?

We last checked these listings on 2026-11-02 and re-check every listing monthly. Operators can change their rules, so confirm before you book.

Restrictions come from each tour’s listing on GetYourGuide or Viator: the suitability notes, “Know before you go”, booking rules, and what is and isn’t included. Last checked 2026-11-02. Operators change rules, so confirm before you book.

More about scuba dives in Koh Samui

Seasickness risk: scuba dives elsewhere