We've chartered with Sunsail in Phuket (several times) and in Koh Samui but not for several years since we got our own
boat. They were always pretty good in Phuket but Samui was pretty basic as no marina there so all
provisioning,
water, etc, was by
dinghy to the
boat at
anchor.
Dec-April is the NE monsoon and therefore the best time to sail the
west coast of the Malaysian peninsula (Phuket side) which in any case is more attractive. May is when the monsoon starts to swing around to the SW and
weather can be changeable. Don't expect too much
wind though.
There are lots of day boat trips out to the islands of Phang Nga bay so lots of tourists during the day but they clear off and leave most of the
anchorages reasonably peaceful overnight. The further away from Phuket and Krabi you get the quieter it will be. That means south east towards Koh Lanta. The alternative is a 60 mile trip out to the Similians off the
west coast of Phuket which has the best
coral in the area but you will need special permission from the
charter company for that trip.
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