Bugs,skeeters and the like come with the rain or should I say after the rain. If you are staying on the beach the winds keep them away and it will be windy season. Baby oil under your suit will protect you from pica pica as they slide around and cant sting, they sting you under your suit when they get trapped so unless you know your guide intimatly you wont be able to see a rash.Unless you know what to look for you probably wont see them in the water. Baby oil also does the same for sand flies as the cant get a grip on you. Actually any oil, I have used cooking oil in a pinch.