Maritime conditions will also become treacherous, with the upper Andaman Sea experiencing strong wind waves from Monday (June 29, 2026) to Friday (July 3, 2026).
Waves are forecast to reach heights of two to three metres, and could exceed three metres in areas experiencing thunderstorms.
The lower Andaman Sea and the upper Gulf of Thailand will see wave heights of about two metres, swelling higher during thunderstorms.
Mariners in these waters must navigate with extreme caution and strictly avoid thunderstorm areas, whilst operators of small boats in the upper Andaman Sea are advised to remain ashore entirely.
The public can stay updated by following official announcements through the agency’s website at tmd.go.th, or by contacting their 24-hour hotlines at 0-2399-4012-13 and 1182.
The meteorological agency is scheduled to release its next update at 5am on Saturday (June 27).
