At this time of year the west coast of Thailand is perfect, with Phuket, Krabi, Khao Lak, Koh Lanta and Phi Phi Island all in the dry season, with long hot sunny days the prevailing feature.
Similarly the West Coast of Peninsula Malaysia is in the dry season, making Langkawi, Penang and Pangkor Islands great beach holiday destinations at this time of year. The climate is Borneo is also generally good in March, making this is a good month for touring Borneo.
March is still high season for touring in Cambodia, Laos and Myanmar with low rainfall and slightly lower temperatures prevailing.The south of Vietnam including Nha Trang, Mui Ne and Phu Quoc Island should be ideal at this time of year. Central Vietnam also has a good climate at this time of year making Hoi An a great choice for a beach holiday to Vietnam.
Most of the Philippines is in high season and this is one of the best times of year to visit the Philippines.
In the Indian Ocean, Sri Lanka (with the exception of the east coast) is a great choice in March, as is the Maldives, which is a great Winter Sun destination. Mauritius is a year-round destination and March is a good time to visit. March is one of the best times to visit the Seychelles as the climate is usually calm and windless.
Oman and the UAE are perfect at this time of year as temperatures are much more reasonable than in the summer months.