El Nino Watch
Boats from Samui to the mainland.
Koh Samui watch
Car and passenger ferries: Seatran Ferry (Nathon to Donsak) and Raja Ferry (Lipa Noi to Donsak). Lomprayah: boat + bus to Donsak / Surat Thani, and high-speed catamaran to Chumphon via Koh Phangan and Koh Tao.
Limits. No schedules or fares are given: they change. Only official websites that answered on 2026-09-24 are linked.
Check the day's departures and cancellations on the operator's site or at the pier. Car ferries are the most weather-resistant; the Chumphon catamaran is the most exposed.
Ferries carry most people, vehicles and pets off the island and stop first in rough seas.