The Meteorological Department Forecasts for the next 24 hours indicate that Thailand will continue to experience heavy rain in some areas, which may cause flash floods and mudslides.
10 August 2026The Meteorological Departmentforecasts that in the next 24 hours, Thailand will still have heavy rain in some areas due to a monsoon trough passing through the upper northern region and upper Laos, combined with a fairly strong southwest monsoon covering the Andaman Sea, Thailand, and the Gulf of Thailand. People in these areas should be cautious of heavy to very heavy rain and accumulated rainfall, which may cause flash floods and mudslides, especially in foothill areas near waterways and lowlands.
Waves and winds in the upper Andaman Sea and upper Gulf of Thailand are quite strong, with waves 2-3 meters high, and in areas with thunderstorms, waves exceeding 3 meters. Mariners are advised to navigate with caution and avoid sailing in thunderstorm areas. Small boats in the upper Andaman Sea and upper Gulf of Thailand should refrain from leaving shore.
For the 7-day weather forecast from 10 to 11 August 2026, Thailand will have heavy rain in some places due to a monsoon trough crossing the upper northern region and upper Laos, combined with a fairly strong southwest monsoon covering the Andaman Sea, Thailand, and the Gulf of Thailand.
Waves and winds in the upper Andaman Sea and upper Gulf of Thailand remain fairly strong, with waves 2-3 meters high, and in thunderstorm areas, waves exceed 3 meters. The lower Andaman Sea has waves about 2 meters high, exceeding 2 meters where thunderstorms occur.
From 12 to 16 August 2026, rainfall is expected to decrease across Thailand but heavy rain will still occur in some parts of the North, Northeast, Central, East, and western South regions due to a monsoon trough passing over Myanmar, upper Laos, and upper Vietnam, combined with a weakening southwest monsoon over the Andaman Sea, Thailand, and the Gulf of Thailand.
Waves and winds in the upper Andaman Sea and upper Gulf of Thailand will weaken, with waves about 2 meters high and over 2 meters in thunderstorm areas. The lower Andaman Sea will have waves 1-2 meters high, exceeding 2 meters in thunderstorms.
However, people across Thailand should remain cautious of heavy and accumulated rainfall, which may cause flash floods, mudslides, and river overflows, especially in foothill and lowland areas near waterways. Mariners in the Gulf of Thailand and Andaman Sea should navigate carefully and avoid sailing in thunderstorm areas. Small boats in the upper Andaman Sea are advised not to leave shore during 10-11 August 2026.