Hi Ben,
I live in Thailand & regularly ride up north. For sure you will get wet in August (Xmas holidays would be a dryer & cooler option if possible). Having said that it rarely rains all day long and its warm rain - so the rain in itself is no big deal if you are prepared to be a little flexible.
What you do need to watch out for is safety, so as has been said definately wear a helmet (& preferably other protective gear too) - regardless of what you see others doing. The accident rate in Thailand is staggering & you dont want to ruin your holiday.
Thailand is a great place to visit any time of year & I am sure you will have a blast if you decide to come.
|