july can be hot ,humid and rainy.
sunsail operate out of royal langkawi yacht club.
with a
catamaran you will find plenty of places you can
anchor around the island,though big tides and strong currents can make
navigation interesting,and landing difficult at low tide.
water is discoloured and swimming can be dangerous due to stinging jelly
fish.
sailing to phuket you may find very little
wind,but clear
water,care needed during thunder storms for onshore winds in exposed
anchorages.
lots of
fishing boats with nets out.