Eerie fog shrouded a lake as temperatures plummeted in northern Thailand.

Footage shows thick mist blanketing the Phayao Lake in Phayao province amid frigid weather on December 20.

Despite the cold, tourists carried on with boat rides to admire the haze-obscured scenery.

The Thai Meteorological Department (TMD) said a strong high-pressure system was prevailing over northern Thailand and causing cold temperatures.

A further drop of 4 to 6 degrees Celsius in the north was forecast from December 20 to 25 as another cold front from China was expected to blow in.

Meanwhile, the capital Bangkok and its vicinity was predicted to experience temperature drops of 3 to 5 degrees Celsius.

The TMD said the period is expected to be the coldest so far during the holiday season in Thailand.