The Thai Meteorological Department forecasts less rain in the upper north and central regions, with thunderstorms in about 30% of areas. The east and west coasts of the south still face heavy rain and flood risk, with 60% thunderstorm coverage. Sea waves are 1-2 m in the Andaman Sea and over 2 m near storms. If your business ships, fishes, or runs boats in the south or Andaman, plan around rough seas and delays. If you run outdoor work or deliveries in the south, expect rain disruption.