The Thai Meteorological Department has issued a severe weather warning for heavy rainfall and potential flooding across Thailand from 29 May to 1 June.
National Weather Warning
This alert directly affects major expatriate hubs. A strong south-west monsoon and a monsoon trough are driving these conditions, bringing continuous rain to the Central, Southern, Eastern, and Northern regions. British residents must prepare for sudden flash floods. Forest run-off poses a specific risk for those living near natural waterways or in low-lying rural areas outside city limits. Localised flooding routinely disrupts provincial road networks during such heavy rain events.
Regional Forecasts
Bangkok and the surrounding Central region face scattered thunderstorms. Northern and Eastern expat populations in Chiang Mai, Chonburi, Rayong, and Trat will experience similar disruption, alongside peak daily temperatures of 37 degrees Celsius. The heaviest rainfall will strike the western coastline of the South. Provinces including Phuket, Phang Nga, and Krabi are forecast to receive widespread thunderstorms and very heavy isolated downpours. Property owners should clear drainage systems. Motorists in these southern regions face reduced visibility and slippery road surfaces.
Marine and Travel Disruption
Marine conditions in the Andaman Sea will deteriorate. From Phuket northwards, waves will reach three metres and peak higher during active storms. Small vessels and recreational boats must remain ashore. Further south from Krabi, and across the upper Gulf of Thailand, wave heights will average two metres. British nationals planning ferry crossings or island travel during this window should anticipate sudden schedule cancellations and logistical delays. Passengers should check with local transport operators before departing their accommodation. Official updates are available through the Thai Meteorological Department website at tmd.go.th or by contacting their 24-hour hotlines on 1182.
