Surat Thani is the other main port to come to Koh Tao. However, if you don’t like traveling with the night boat, be prepared for a 6 hour day boat journey.
Only one company, Songserm, offers this trip daily leaving Surat Thani at 8 am, arriving on Koh Tao around 14 pm. If you want a shorter day boat trip, leaving from Chumphon will bring you to Koh Tao in less than 2 hours.
The nightboat leaves daily around 23.00 pm and arrives on Koh Tao the next day around 6.30 am. The boat has sleeping facilities but this doesn’t involve much more than a small pillow and a thin matrass.
The nightboat has its charm and is an easy way to travel "fast" even comfortable if you are prepared to accepts its limitations.
Tickets for Songserm and nightboat to Koh Tao can be bought in one of the numerous travel agency you will find in Surat Thani.