Speaking of sailing, Anambas is located far enough offshore to get treated to decent trade-like winds every so often, ranging from 12-25 knots. The northeast can exceed 30 knots even.
That said, by and large, winds are typically a friendly 12-16 knots. And with literally dozens of bounty islands dotted around, sheltered spots are always available.
Incidentally, if you prefer your fun submerged, i.e. you're a diver, then it's good to know that Anambas lies within the greater Coral Triangle.
Diving, as well as snorkeling, around Anambas, given the awesome water clarity and countless coral gardens, is nothing short of world-class.
Want more details about the weather in Anambas? Just let us know.