Japan · Nation Thailand
TMD issues heavy rain warning for 29 provinces across Thailand
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The Thai Meteorological Department ( TMD ) has warned of heavy rain in 29 provinces on Monday (July 13, 2026), as the southwest monsoon prevails over the Andaman Sea and a low-pressure cell covers upper Vietnam.
Key facts
- Over the next 24 hours, heavy rain is forecast in some parts of Thailand, with very heavy rain in parts of the upper Northeast, the western part of the Central region, the East and the western coast of southern Thailand.
- Small boats in the Andaman Sea and the upper Gulf should remain ashore until Wednesday (July 15, 2026).
- Waves in the upper Andaman Sea will be 2-4 metres high, rising above 4 metres during thundershowers.
- In the lower Andaman Sea and the upper Gulf, waves will be 2-3 metres high, rising above 3 metres during thundershowers.
Summary
Over the next 24 hours, heavy rain is forecast in some parts of Thailand, with very heavy rain in parts of the upper Northeast, the western part of the Central region, the East and the western coast of southern Thailand.
The strong southwest monsoon is prevailing over the Andaman Sea, Thailand and the Gulf of Thailand, while a low-pressure cell covers upper Vietnam.