Meteorological Department Predicts 2026-27 Winter Arriving One Week Late with Bangkok Temperatures Dropping to 19-21°C - Thairath English

The Meteorological Department forecasts that the 2026-27 winter will arrive one week late, ending around mid-February 2027. Bangkok's minimum temperatures will be between 19 and 21 degrees Celsius.

15 Oct 2026 GMT+7Meteorological Departmenthas forecasted the weather conditions for Thailand's winter season 2026-27.It stated that in upper Thailand, winter will begin about one week later than average, starting around the third week of October 2026 and ending around mid-February 2027.

The average minimum temperature in upper Thailand is expected to be about 22.0 to 23.0 degrees Celsius, approximately 2 degrees higher than the normal 19.9 degrees Celsius, and less cold than last year’s average minimum of 19.6 degrees Celsius. Minimum temperatures of about 10 to 12 degrees Celsius will mostly occur in the upper northern and northeastern regions. Bangkok’s lowest temperatures will be around 19 to 21 degrees Celsius, and the metropolitan area will range from 18 to 20 degrees Celsius.

The coldest period is expected from late December 2026 to early February 2027.

Mountain peaks and highlands, including mountain ranges, will experience cold to very cold weather with frequent frost occurrences.

The southern region will experience cool weather in some areas and periods, mainly in the upper south, but rain will remain heavy and frequent, especially on the eastern side during November and December. Heavy to very heavy rain in some places may cause flash floods, landslides, and river overflows in several areas. Winds and waves in the Gulf of Thailand will be strong intermittently, with waves 2 to 3 meters high, and the Andaman Sea waves will be 1 to 2 meters high.

In November and December, low-pressure areas may form and likely develop into tropical cyclones approaching or passing through the Gulf of Thailand and southern region, causing heavy rain, strong winds, and possible storm surges with wave heights of about 3 to 4 meters.

The El Niño phenomenon is expected to intensify from late 2026 into early 2027, likely contributing to higher than normal temperatures and milder cold conditions in Thailand compared to previous years.

The North and Northeast will experience widespread cool weather with some cold days in upper areas.

The Central and East will have cool weather in some upper areas, with light rain covering 10 to 20 percent of these regions, thunderstorms, and occasional strong gusts due to intermittent high-pressure systems extending from China, combined with the northeast monsoon covering Thailand.

The high-pressure system from China will persist over upper Thailand with increasing strength and duration, lowering temperatures further. The northeast monsoon will continue with moderate to occasionally strong winds, causing widespread cool weather and cold conditions in upper areas of the North and Northeast. Mountain peaks and highlands will experience cold to very cold weather, while Central and East regions will have generally cool weather, mostly in upper areas.

Afterward, weather conditions will fluctuate, with warming daytime temperatures and some areas experiencing hot weather and thick fog. The North and Northeast will still have chilly mornings due to weakening high-pressure from China.

Widespread heavy rain is expected, especially on the eastern side from Chumphon Province southward, with thunderstorms covering 60 to 80 percent of the area, including heavy to very heavy rainfall in some places.

This will cause flash floods, landslides, and river overflows in some areas. Winds and waves in the Gulf of Thailand will be strong intermittently, with waves 2 to 4 meters high at times. The Andaman Sea will have waves of 1 to 2 meters high due to the northeast monsoon. The northeast monsoon will be strong at intervals, especially in November and December, with monsoon troughs crossing the South. Occasionally, strong low-pressure systems or tropical cyclones may approach or pass the South. Rain will decrease toward the end of February as the northeast monsoon weakens and shifts to easterly or southeast winds.

Cool weather will prevail almost everywhere with some cold days mainly in upper areas. Morning fog is common. Thunderstorms will cover 10 to 20 percent of the area with occasional strong gusts.

The weather will become colder with widespread cold conditions, especially in upper areas. Mountain peaks and highlands will have cold to very cold weather with occasional frost. Then, weather will become unstable with warming temperatures, occasional rain, thick fog in many areas, and chilly mornings. Hot weather will develop in many areas during the day.

Cool weather will occur in some upper areas with morning fog. Thunderstorms will cover 20 to 30 percent of the area with possible strong gusts on some days.

Mostly cool weather, especially in upper areas and mountainous regions, with thick fog at times. Then, weather will become unstable, warming up with occasional rain and hot daytime temperatures. Thick fog will persist in many areas, though upper and mountainous areas will remain cool in the mornings.

Heavy, widespread rain from Chumphon Province southward, with thunderstorms covering 60 to 80 percent of the area. Some places will experience heavy to very heavy rain causing flash floods, landslides, and river overflows. Winds will be strong with waves of 2 to 4 meters at times. Rain will gradually decrease afterward, except in the lower South where 30 to 40 percent coverage with some heavy rain will persist on some days.

Thunderstorms will cover 30 to 50 percent of the area with some heavy rain. Waves in the Andaman Sea will be 1 to 2 meters high.

Thunderstorms will cover 20 to 30 percent of the area with cool weather on some days, morning fog, and occasional strong gusts on some days.

Mostly cool weather with thick fog in several areas at times. Later, weather will fluctuate with warming daytime temperatures and hot weather in many areas, alongside occasional rain on some days.