The Meteorological Department's Announcement No. 6 warns of heavy to very heavy rain across Thailand and lists affected provinces up to 18 May, advising vigilance for flash floods and flash floods.
15 May 2026 GMT+7Meteorological DepartmentThe Meteorological Department issued Announcement No. 6 regarding heavy to very heavy rain over Thailand and strong winds in the Andaman Sea, effective until 18 May 2026.
It states that Thailand is experiencing increasing rain with heavy to very heavy showers in the northern, central, eastern, and southern regions. Residents in these areas should be cautious of dangers from heavy rainfall and accumulated rain that may cause flash floods and flash floods, especially in foothill areas near waterways and low-lying zones. This is due to the strengthening southwest monsoon covering the Andaman Sea, Thailand, and the Gulf of Thailand. People are also advised to take care of their health amid changing weather conditions.
Waves and winds in the Andaman Sea and Gulf of Thailand are intensifying. In the upper Andaman Sea, from Phuket province northwards, waves reach 2–3 meters high, exceeding 3 meters in stormy areas. In the lower Andaman Sea, from Krabi province southwards, and the upper Gulf of Thailand, waves are about 2 meters, rising above 2 meters in stormy zones. Mariners in these areas should navigate carefully and avoid sailing in stormy conditions. Small boats in the upper Andaman Sea are advised to remain ashore.
Residents are urged to follow announcements from the Meteorological Department and can access information on the department’s website.http://www.tmd.go.thOr call 0-2399-4012-13 and 1182, available 24 hours.
