An hour of open blue between the diving island and the party island - the Gulf's classic double act.
Find a room before you go.
All the main operators link Mae Haad and Thong Sala several times a day, so this hop rarely needs planning - outside Full Moon week, when southbound boats burst at the seams. Post-dive travellers: mind the no-fly-style advice about boat bumps less, surface intervals more.

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Lomprayah's fast boats do the hop as part of the Chumphon-Samui run. Comfortable, air-conditioned, quick.
Songserm's steadier pace suits unhurried afternoons and smaller budgets.
The same services roll on to Samui or back to Chumphon - Koh Tao to anywhere in the Gulf is one booking.
Step-by-step transport guides for this stretch of the Gulf coast.