That being said last year I went in early October (still hurricane season) and rode every day except one in two weeks. Spent 5 days on a 7m in intense and awesome storm systems.
Yes, I suspect you had a two week period of tropical storms or tropical depressions. Thats when they always happen , in september and october. Always wet too.
He is asking about August, which is really the transition month from the dry season to the wet season.
I would take a big kite in August. Any trades left over will need that, Any Tropical Storms will indeed need a 7m, but you can't bank or plan for that, and indeed August is before any real Tropical systems develop, except for a few historically