Cool mountain air and seas of mist await at Doi Inthanon and Phu Chi Fa
Thundershowers will precede cooler weather in upper Thailand on November 18–22 while southern areas prepare for heavy rain and rough seas.
- Cool morning temperatures were recorded at northern mountain viewpoints, with 9°C at Doi Inthanon and 11°C at Phu Chi Fa.
- Visitors gathered at both locations to watch the sunrise and experience "seas of mist" spreading across the mountain landscapes.
- At Doi Inthanon, officials highlighted clear skies and invited tourists to explore the misty Kew Mae Pan nature trail.
- Due to heavy dew at Phu Chi Fa, officials issued a driving advisory, warning of wet and slippery mountain roads.
Morning temperatures of 9°C at Doi Inthanon and Kew Mae Pan in Chiang Mai drew weekend visitors to northern Thailand’s mountain viewpoints on Saturday (November 14, 2026), while Phu Chi Fa in Chiang Rai recorded 11°C.
Visitors gathered to watch sunrise and mist spreading across the mountain landscape as a cold air mass continued to cover upper Thailand. At Phu Chi Fa, however, heavy dew left mountain roads wet and slippery, prompting officials to issue driving advice.
The Thai Meteorological Department (TMD) also outlined a further change in conditions for November 18–22, with thundershowers preceding cooler weather across upper Thailand and persistent heavy rain expected in the South.
Clear skies and morning mist at Doi Inthanon
Doi Inthanon National Park in Chom Thong district, Chiang Mai, reported clear skies and morning mist in its November 14 weather update. Minimum temperatures were:
- Doi Inthanon summit: 9°C
- Kew Mae Pan: 9°C
Park officials invited visitors to explore the Kew Mae Pan nature trail, where mist stretched across mountain ridges above the surrounding forests.
Slippery roads at Phu Chi Fa
Phu Chi Fa National Park in Thoeng district, Chiang Rai, also reported cold morning conditions. Minimum temperatures were:
- Phu Chi Fa summit: 11°C
- Park headquarters: 12°C
Heavy dew had made roads leading up and down the mountain damp and slippery. Officials advised motorists to use low gears on steep sections, check that their brakes were working properly and follow park staff’s instructions.
Thundershowers before cooler weather in upper Thailand
The TMD’s November 18–22 outlook indicates thundershowers and isolated gusty winds across upper Thailand at the beginning of the period, followed by cooler conditions and strong winds as another cold air mass moves in.
The outlook covers the North, Northeast, Central region, East and Bangkok. The department advised residents to take care of their health as conditions change and farmers to protect crops against possible weather damage.
Heavy southern rain and stronger waves
Southern Thailand is expected to experience persistent rain on November 18–22, with heavy falls in many areas and isolated very heavy rain.
Accumulated rainfall could trigger flash floods and rapid run-off, particularly on foothill slopes near waterways and in low-lying areas.
Winds and waves are expected to strengthen across the Gulf of Thailand and the Andaman Sea. Waves in the lower Gulf could reach about two metres, rising above three metres in thundershowers.
The TMD advised mariners in both seas to check their routes, navigate cautiously and avoid areas affected by thundershowers.
