Bangkok, Thailand – June 1, 2025 – The Thai Meteorological Department (TMD) has issued a weather warning for June 1, forecasting heavy rain across 28 provinces, with Bangkok expected to experience the most severe conditions. Residents are urged to prepare for potential flooding and hazardous weather as the monsoon season intensifies.
The TMD reports that moderate monsoon conditions are currently affecting the Andaman Sea, Thailand, and the Gulf of Thailand. Over the next 24 hours, heavy rainfall is anticipated in the northern and upper northeastern regions, while thunderstorms are expected in parts of southern Thailand. Citizens in these areas are advised to remain vigilant and take precautions against the risks associated with heavy rain.
In the Andaman Sea, moderate sea conditions are predicted, with wave heights reaching 1 to 2 meters, and potentially exceeding 2 meters during thunderstorms. Mariners are advised to navigate with caution and avoid areas experiencing storm activity.
Regional Weather Forecasts
- Northern Thailand: Thunderstorms are expected to cover 60% of the area, particularly in Tak, Phichit, Phitsanulok, and Phetchabun. Temperatures will range from 23 to 25 degrees Celsius, with highs between 32 and 35 degrees Celsius.
- Northeastern Thailand: Thunderstorms are forecasted in 40% of the area, with heavy rain anticipated in Bueng Kan and Nakhon Phanom. Temperatures will range from 23 to 26 degrees Celsius, with maximums of 32 to 35 degrees Celsius.
- Central Thailand: Thunderstorms are expected in 40% of the area, affecting Nakhon Sawan, Uthai Thani, Lopburi, Saraburi, Kanchanaburi, and Ratchaburi. Temperatures will drop to 24 to 26 degrees Celsius, with maximums of 33 to 36 degrees Celsius.
- Eastern Thailand: Thunderstorms are anticipated across 60% of the area, notably in Nakhon Nayok, Prachinburi, Chachoengsao, Chon Buri, Rayong, Chanthaburi, and Trat. Minimum temperatures will be 24 to 29 degrees Celsius, with highs of 33 to 35 degrees Celsius.
- Southern Thailand: The eastern coast will see thunderstorms in 20% of the area, particularly in Phetchaburi, Prachuap Khiri Khan, Surat Thani, Nakhon Si Thammarat, Yala, and Narathiwat. The western coast will also experience thunderstorms in 20% of the area, mainly in Ranong, Phang Nga, and Krabi.
In Bangkok and its surrounding areas, 60% of the region is expected to experience thunderstorms, with temperatures ranging from 25 to 27 degrees Celsius and highs between 34 and 36 degrees Celsius.
As the severe weather approaches, residents are encouraged to stay informed and take necessary precautions to ensure their safety during this challenging weather period.