How long will the cold last? Check the latest weather update before preparing your clothes. The Meteorological Department forecasts a slight temperature rise in Thailand from 15-17 Jan, with light rain in the upper North and upper Northeast.
At 18:00 on 12 Jan 2026 GMT+7, the Meteorological Department issued a 24-hour general weather forecast stating that temperatures across Thailand will rise, with morning fog. The upper part of the country remains cold, while the upper South experiences cool mornings as the strong cold air mass begins to weaken.
The lower South will have light rain in some areas due to a moderate northeast monsoon. Waves and winds in the Gulf of Thailand and the Andaman Sea are moderate (waves 1–2 meters in the Gulf and offshore Andaman). Mariners are advised to navigate with caution.
Meanwhile, dust and haze levels in upper Thailand are moderate to quite high and tend to increase due to poor air ventilation.
Thailand Weather Forecast (18:00 today to 18:00 tomorrow)
Northern Region Cold weather with morning fog. Temperatures will rise by 1–3 degrees Celsius. Minimum 12–16°C, maximum 27–32°C (mountain peaks 4–10°C).
Northeastern Region Weather Cold with some fog. Temperatures will rise by 1–3 degrees Celsius. Minimum 10–16°C, maximum 26–30°C (mountain peaks 4–10°C).
Central Region Cool to cold weather with some fog. Temperatures will rise by 1–2 degrees Celsius. Minimum 14–17°C, maximum 28–30°C.
Eastern Region Cool to cold weather with some fog. Temperatures will rise by 1–2 degrees Celsius. Minimum 16–21°C, maximum 30–32°C. Waves about 1 meter, 1–2 meters offshore.
Eastern Southern Region Cool weather with some fog. Temperatures will rise by 1–3 degrees Celsius. The lower South will have light rain in some areas. Minimum 17–22°C, maximum 28–32°C. Waves 1–2 meters.
Western Southern Region Cool in the morning. Minimum temperature 21–24°C, maximum 32–34°C. Waves about 1 meter, 1–2 meters offshore.
Bangkok and Surrounding Areas Cool weather with some fog. Temperatures will rise by 1–2 degrees Celsius. Minimum 17–19°C, maximum 30–32°C.
, Meteorological Department also forecasts general weather conditions from 12 to 18 January 2026 GMT+7. During 12–18 Jan, temperatures in upper Thailand will rise by 3–6 degrees Celsius with morning fog and some thick fog in certain areas. Cold to chilly weather will persist in the North, Northeast, and Central regions due to weakening high-pressure or cold air masses covering upper Thailand and the South China Sea. From 15–17 Jan, a westerly wind wave from Myanmar will move over the upper North, upper Northeast, and upper Laos, causing light rain in some areas.
For the South, there will be isolated thunderstorms in the lower part due to the northeast monsoon covering the Gulf of Thailand, the South, and the Andaman Sea. Waves and winds in the Gulf of Thailand and Andaman Sea will weaken, with wave heights of 1–2 meters in the lower Gulf and offshore Andaman Sea. In areas with thunderstorms, waves may exceed 2 meters.
Residents in upper Thailand are advised to take care of their health due to the cold weather, exercise caution when traveling through foggy areas, and be aware of fire hazards because of dry conditions. Mariners in the Gulf of Thailand and Andaman Sea should navigate carefully and avoid sailing in areas with thunderstorms throughout the period.