Nation Thailand
Monsoon brings heavy rain and rough seas across Thailand
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The Thai Meteorological Department (TMD) warned on Tuesday (August 25, 2026) that isolated heavy rain would continue in the North, upper Northeast and western Central region over the next 24 hours.
Key facts
- The East is forecast to have the widest thunderstorm coverage, at 60% of the region, while Bangkok and surrounding provinces will experience thunderstorms mainly between the afternoon and evening.
- Government faces parliamentary scrutiny over THB400bn loan decree
- The following forecast covers the period from 6am on Tuesday to 6am on Wednesday (August 26, 2026).
- Waves in the upper Andaman Sea are forecast to reach 2-3 metres and exceed 3 metres during thunderstorms.
Summary
The East is forecast to have the widest thunderstorm coverage, at 60% of the region, while Bangkok and surrounding provinces will experience thunderstorms mainly between the afternoon and evening.
A rather strong south-westerly monsoon is covering the Andaman Sea, Thailand and the Gulf of Thailand. A monsoon trough also extends across upper Myanmar and upper Laos into Tropical Storm Narra over the Gulf of Tonkin.