When is the best weather to visit and dive in Thailand ?
Most of Southern Thailand (the main diving region) has only two seaons, a wet and dry, with small temperature differences between the two. The West Coast experiences dry season, October to May, whilst the East Coast has dry season January to November. Most of Thailand – with the mountains in the North and the Khorat Plateau of the North-East notable exceptions – is very humid, with and overall average humidity of 66% to 82%, depending on the season and time of day. The hot part of the dry season reaches its hottest along the north-east plain, and temperatures easily soar to 39 C in the daytime, dropping only a few degrees at night. The temperature can drop to 13 C at night during the cool season in Chiang Mai. If you’re visiting the North during the cooler months, long sleeved shirts and sweaters would be in order.