CT has good info and ive been traveling around SEA the last 5/6 years around july/august looking for that idyllic spot where it pumps everyday from morning till late
and let me tell ya, im still looking for it
thailand is very fickle and no guarantee at all that your spend time on the water, altho i still go back as there are many other things to see and do
i thought i had finally found it when i struck gold in vung tau a couple of years back and it really did blow 24/7 but the last 2 times have been average but still get time on the water. i dont know if its the la nina weather pattern fooking up things but i will be back again this year
during this time mui ne sux (wind is slightly off-shore) but it does have the advantage of a lake which altho gusty will have wind (microclimate)
also spent a week in sri lanka last year but the wind was light.... the previous week was pumping
so where ever u decide to go, its hit and miss
this year im checking out the top of sumatra, indo. supposedily gets good winds around banda aceh
back to thailand to a place called chumphon (fingers crossed)
and VT
all these places would rock in the north-east season nov-march but in the south-west season june-oct u take what u can get