Sure! You can do a boat trip with any duration you want.
Standard trips are 10 days/11 nights long; shorter trips are cheaper; longer trips are more expensive.
We recommend durations between 8 and 12 days. Less than 8 days and you risk missing that perfect swell for just 1 or 2 days. Besides, it’s a shame to travel halfway around the world to spend such a short time in paradise.
On the other hand, more than 12 days and you can bet you’ve had more than enough surf, you’ll be totally surfed-out …and by then most guys are missing their kids, wives, terra-firma, etc.  But we can do it: a couple of years ago we run a 24 days long trip!