Today's weather conditions The Meteorological Department warns of heavy rain in some areas, while tropical storm Narra is set to make landfall in southern Guangxi Province and will not move into Thailand.
25 August 2026The Meteorological Departmentissued a 24-hour weather forecast stating that Thailand will experience thunderstorms in some areas with heavy rain in parts of the northern region, upper northeastern region, and the western side of central Thailand. This is due to a fairly strong southwest monsoon covering the Andaman Sea, Thailand, and the Gulf of Thailand, combined with a monsoon trough passing through upper Myanmar and upper Laos into Tropical Storm Narra in the Gulf of Tonkin. People in these areas are advised to be cautious of dangers from heavy and accumulated rain.
Winds and waves in the upper Andaman Sea are quite strong, with waves 2-3 meters high and over 3 meters in areas with thunderstorms. The upper Gulf of Thailand has waves around 2 meters high, rising above 2 meters where thunderstorms occur. Mariners in the Andaman Sea and the Gulf of Thailand should exercise caution and avoid sailing in stormy areas. Small boats in the upper Andaman Sea are advised to refrain from setting out to sea during this period.
Furthermore, Tropical Storm Narra in the Gulf of Tonkin is expected to make landfall in southern Guangxi Province, China, on 25-26 August 2026. The storm will not move into Thailand. Travelers to this area should check weather conditions before their journey during these dates.
The 7-day weather forecast for 25-26 August 2026 indicates heavy rain in some parts of Thailand due to a fairly strong southwest monsoon covering the Andaman Sea, Thailand, and the Gulf of Thailand, combined with a monsoon trough passing through Myanmar and upper Laos into Tropical Storm Narra in the Gulf of Tonkin.
From 27-31 August 2026, northern Thailand will see increasing rainfall with heavy rain in some areas, especially in the north and northeast. Some locations in the eastern region, western coast of the south, and western central region will experience very heavy rain. This is due to the continuing strong southwest monsoon covering the Andaman Sea, Thailand, and the Gulf of Thailand, along with the monsoon trough moving southward over the upper northern region and upper Laos on 29-30 August 2026.
Winds and waves in the upper Andaman Sea remain strong, with waves 2-3 meters high and exceeding 3 meters in thunderstorm areas. The upper Gulf of Thailand has waves around 2 meters high, rising above 2 meters in areas with thunderstorms throughout this period.
From 27–31 August 2026, residents in the western northern region, upper northeastern region, central region, eastern region, and western southern coast should be cautious of heavy to very heavy rainfall and accumulated rain that may cause flash floods, landslides, and river overflows, especially near waterways and low-lying areas. Mariners should navigate carefully and avoid sailing in stormy weather. Small boats in the upper Andaman Sea are advised not to go out to sea during this time.