Bangkok: Today's weather forecast indicates heavy rain in three Thai regions, raising concerns about potential flash floods. High waves are also expected in the Andaman Sea. Thailand is experiencing thunderstorms and heavy rainfall in parts of the North, Central, and Eastern regions. This weather pattern results from a monsoon trough traversing the upper regions of Northern Thailand and upper Laos, connecting to Tropical Storm "Narra" in the Gulf of Tonkin. Additionally, a strong southwest monsoon is affecting the Andaman Sea, Thailand, and the Gulf of Thailand. Residents in these regions should be cautious of prolonged heavy rainfall, which could lead to flash floods, landslides, and overflowing rivers, particularly in areas on slopes near waterways and low-lying areas.

According to Thai News Agency, the upper Andaman Sea is experiencing strong wave conditions, with heights reaching 2-3 meters. In regions with thunderstorms, wave heights may exceed 3 meters. The upper Gulf of Thailand is also seeing wave heights around 2 meters, with potential increases in stormy conditions. Mariners in both the Andaman Sea and the Gulf of Thailand are advised to remain vigilant and avoid navigating through stormy areas. Small boats in the upper Andaman Sea are particularly cautioned against setting sail during this period.

Tropical Storm "Narra" is currently positioned in the Gulf of Tonkin and is forecasted to make landfall in southern Guangxi Province, China, between August 24-25, 2026. The storm is not expected to move towards Thailand and will not directly influence the country's weather. Nonetheless, those planning to travel to the affected area in China are advised to consult weather forecasts before departure during these dates.