Go to PATTAYA, stay in the Jomtien area in a tower condo on the beach. anywhere above the 10th floor you should have a constant breeze. The seawater is nice and warm then, by nighttime it has cooled off, and if you are at all uncomfortable, go to a/c restaurants. You can wear shorts 24/7 in the Pattaya area. I have been here full time for 4 1/2 years, and visited often before that, and never found it too bad in Pattaya. INLAND IS SWELTERING, like 100F and 100% humidity. Whoever said it was dry really just didn't know what she was talking about. Songkran is April 19 in Pattaya, and that is crazy! On that day you'll wish it was warmer, because everyone is playing SongKran with water! Fun to see one time for sure.
Hawaii would be my alternative.