South sees rain increase later
In the South, weather conditions are shifting in the opposite direction. Between April 16 and 18, only isolated thunderstorms were reported alongside hot daytime conditions, influenced by westerly winds over the Andaman Sea and upper Gulf of Thailand, combined with south-easterly winds over the lower Gulf.
However, from April 19 to 22, rainfall is expected to increase, with thunderstorms becoming more widespread as south-easterly winds strengthen across the Gulf, the South and the Andaman Sea.
Wave conditions in both the Gulf of Thailand and the Andaman Sea remain relatively mild, averaging around one metre, but could exceed two metres in areas experiencing thunderstorms.
Regional outlook
Across the North, hot to extremely hot weather dominates, with storms affecting 10–30% of areas between April 18 and 20, particularly in eastern parts of the region. Temperatures are forecast to reach highs of 36–42°C.
The Northeast faces more active conditions, with thunderstorms covering 20–40% of the region through April 20, alongside strong winds, hail and isolated heavy rain. Conditions ease slightly afterwards, though heat remains intense, with highs up to 41°C.
