Thailand has a tropical monsoon climate, divided into a wet and dry season. For the central and northern areas, including Bangkok and Chiang Mai, the best times to visit are between November and March, since it is very hot in April and rainy between May and October. The south-west bordering the Andaman Sea, including Phuket and Krabi, is driest between November and March, while the south-eastern coast bordering the Gulf of Thailand is best between May and October.