The TMD warned of more scattered isolated thundershowers, though heavy rainfall is not expected to be as intense as the past week.
Rain is expected to fall on 80% of the area today, with winds gusting 20-40km/h.
Waves in the area will average twi to three metres high, reaching more than three metres in thundershower areas.
The warning, which still is to remain in effect until Saturday (Oct 22), warns people in the area to beware heavy rainfall and runoff causing flash floods and landslides.
Operators of large vessels were ordered to proceed through the area with caution, whille all small boat operators were ordered to remain ashore while the warning is in effect.
The Southwestern Meteorological Center located near Phuket airport reported 103.1mm of rainfall in Mai Khao, 49.5mm in the Thalang town area, and 89.5mm of rainfall in Muang Phuket during the 24 hours from 7am yesterday (Oct 19) to 7am today.
The centre reported 479.9mm of rainfall already for October.
The total rainfall for Phuket so far this year stands at 2348.8mm, the centre reported.