The Meteorological Department forecasts that from 19 to 25 March, upper Thailand will experience rising temperatures, rain showers, and occasional strong gusts of wind. Between 20 and 22 March, the Northeast and East regions will see increased rainfall.
On 19 March 2026, the Meteorological Department's general forecast for 19–25 March 2026 states that upper Thailand will generally experience warmer weather with thunderstorms and occasional strong gusts of wind. This is due to a low-pressure area caused by heat covering upper Thailand, while a weakening high-pressure or cool air mass covers the South China Sea, resulting in southerly and southeasterly winds bringing moisture to upper Thailand.
During 20–22 March 2026, the southerly and southeasterly winds covering the Northeast and East regions will strengthen, causing increased rainfall in those areas.
In the South, thunderstorms will still occur in some areas due to weak easterly and southeasterly winds covering the Gulf of Thailand, the South, and the Andaman Sea. Winds and waves in the Gulf of Thailand will weaken, with wave heights around 1 meter, and in areas with thunderstorms, waves will be higher than 1 meter.
Precautions: Residents in upper Thailand are advised to take care of their health due to the rising temperatures by avoiding prolonged exposure in open areas and to be cautious of dangers from thunderstorms and occasional strong gusts of wind throughout this period.
Northern Region Hot weather during the daytime with thunderstorms covering 10–20% of the area and occasional strong gusts of wind throughout the period. Minimum temperatures range from 19 to 24 degrees Celsius, maximum temperatures from 33 to 39 degrees Celsius. Winds are southwesterly at 5–15 km/h.
Northeastern Region On 19 and 23–25 March 2026, hot weather during the daytime with thunderstorms covering 10–20% of the area and occasional strong gusts of wind mainly in the lower areas. From 20 to 22 March 2026, hot daytime weather with thunderstorms covering 20–40% of the area and occasional strong gusts of wind. Minimum temperatures range from 20 to 25 degrees Celsius, maximum temperatures from 34 to 38 degrees Celsius. Winds are southeasterly at 10–15 km/h.
Central Region Hot weather during the daytime with thunderstorms covering 10–20% of the area and occasional strong gusts of wind mainly in the lower areas throughout the period. Winds are southerly at 10–15 km/h. Minimum temperatures range from 22 to 27 degrees Celsius, maximum temperatures from 33 to 40 degrees Celsius.
Eastern Region On 19 and 23–25 March 2026, hot weather during the daytime with thunderstorms covering 10–30% of the area and occasional strong gusts of wind. From 20 to 22 March 2026, hot daytime weather with thunderstorms covering 20–40% of the area and occasional strong gusts of wind. Winds are southerly at 10–30 km/h. The sea will have waves below 1 meter, with waves higher than 1 meter in areas experiencing thunderstorms. Minimum temperatures range from 24 to 28 degrees Celsius, maximum temperatures from 33 to 36 degrees Celsius.
Southern Region (East Coast) Thunderstorms will cover 10–20% of the area throughout the period from Surat Thani Province northwards. Southeasterly winds blow at 10–30 km/h. The sea has waves below 1 meter, with waves higher than 1 meter in areas with thunderstorms. From Nakhon Si Thammarat Province southwards, easterly winds blow at 15–30 km/h. The sea has waves around 1 meter, with waves higher than 1 meter in areas with thunderstorms. Minimum temperatures range from 22 to 27 degrees Celsius, maximum temperatures from 31 to 37 degrees Celsius.
Southern Region (West Coast) Thunderstorms will cover 10–20% of the area throughout the period. Easterly winds blow at 10–30 km/h. The sea has waves below 1 meter, with waves higher than 1 meter in areas with thunderstorms. Minimum temperatures range from 23 to 27 degrees Celsius, maximum temperatures from 33 to 37 degrees Celsius.
Bangkok and Surrounding Areas Hot weather during the daytime with thunderstorms covering 10–30% of the area throughout the period. Winds are southerly at 10–15 km/h. Minimum temperatures range from 25 to 27 degrees Celsius, maximum temperatures from 34 to 37 degrees Celsius.