"Meteorological Department" is the source of the weather information provided. The 24-hour weather forecast for Thailand predicts thunderstorms and heavy rain in some areas. It lists 17 provinces at risk of heavy to very heavy rainfall.
Date: 24 August 2026 GMT+7The Meteorological DepartmentThe 24-hour weather forecast states that Thailand will experience thunderstorms and heavy rain in some areas of the North, Central, and Eastern regions due to a monsoon trough passing over the upper northern region and upper Laos. "Tropical Storm Nara" Located in the Gulf of Tonkin, combined with a fairly strong southwest monsoon covering the Andaman Sea, Thailand, and the Gulf of Thailand. Residents in these areas are advised to be cautious of heavy and accumulated rainfall that may cause flash floods, mountain runoff floods, and river overflows, especially near hillside areas close to watercourses and lowlands.
Winds and waves in the upper Andaman Sea are fairly strong, with wave heights of 2-3 meters, and in areas with thunderstorms, waves exceed 3 meters. The upper Gulf of Thailand has wave heights around 2 meters, with waves over 2 meters in thunderstorm areas. Mariners in the Andaman Sea and Gulf of Thailand should navigate carefully and avoid sailing in areas with thunderstorms. Small boats in the upper Andaman Sea are advised not to depart during this period.
Northern Region: Mae Hong Son, Chiang Mai, Chiang Rai, Phayao, Nan, Uttaradit, and Tak provinces.
Central Region: Nakhon Sawan, Uthai Thani, Kanchanaburi, and Ratchaburi provinces.
Eastern Region: Nakhon Nayok, Prachinburi, Sa Kaeo, Rayong, Chanthaburi, and Trat provinces.
Additionally, "Tropical Storm Nara" in the Gulf of Tonkin is expected to make landfall in southern Guangxi Province, China, between 24-25 August 2026. This storm will not enter Thailand and thus will not directly affect Thailand's weather. Travelers to that area should check the weather before departing during those days.
The 7-day weather forecast from 24 to 26 August 2026 indicates thunderstorms and heavy rain in some areas, especially in the western part of the North, upper Northeast, Central, and Eastern regions. This is due to the monsoon trough shifting over Myanmar and upper Laos, moving into Tropical Storm Nara in the Gulf of Tonkin, combined with a fairly strong southwest monsoon covering the Andaman Sea, Thailand, and the Gulf of Thailand.
From 27 to 30 August 2026, the western parts of the North, Northeast, Central, Eastern, and western Southern regions will experience increased rainfall with some heavy to very heavy rain due to strengthening southwest monsoon winds over the Andaman Sea, Thailand, and the Gulf of Thailand, while the monsoon trough continues over Myanmar and upper Laos.
Winds and waves in the upper Andaman Sea remain fairly strong, with wave heights of 2-3 meters, and waves over 3 meters in areas with thunderstorms. The upper Gulf of Thailand has waves about 2 meters high, exceeding 2 meters in thunderstorm areas.
Precautions for 27–30 August 2026: Residents in the western parts of the North, upper Northeast, Central, Eastern, and western Southern regions should be careful of heavy to very heavy rain and accumulated rainfall that could cause flash floods, mountain runoff floods, and river overflows, especially near watercourses and lowlands. Mariners should navigate cautiously and avoid sailing in thunderstorm areas. Small boats in the upper Andaman Sea should refrain from departing during this entire period.
Information courtesy of the Meteorological Department.