Welcome on the forum Ka3n.
It depends a lot where you dive/snorkel w.r.t. visibility.
Of course, August is the rainy season (May/June till Oct/Nov) and can cause worse visibility conditions.
Typhoons can spoil your whole scheduled vacation.
I should not be worried to much to come here in August.
Have had most of the time good conditions in that period.
Snorkeling at Apo Island near to the rock formations is even less viz.-risky.
But guarantee you never can get ..... where else they do ? |