Prime Minister Prayut Chan-o-cha says he is concerned for public safety because of tropical storms that have been forecast for the northern regions until next Tuesday.
He has instructed the authorities to take preventive and relief measures against damage.
Government spokesman Lt Gen Werachon Sukondhapatipak said the prime minister is concerned about northern Thailand, especially until March 19.
Tropical storms are expected in the northeast and east and due to move to the northern and central regions and Bangkok.
Prayut called on residents to follow advice from the Meteorological Department and avoid open spaces, big trees and unstable structures. Farmers were advised to prepare for possible damage.
The premier instructed the Ministry of Interior, Ministry of Agriculture and Cooperatives and the armed forces to continually monitor the situation and alert those at risk while taking preventive and relief measures.
The weather for southern Thailand, including the Andaman coast, is for potential thunderstorms but is mostly fine, according to the Meteorological Department.