Hi Blixten,
Rignt now it is still raining, looking at the radar there are more heavy showers on the way. I would pack up and go to Phuket if I were here on a holiday. Perhaps that will be an option for you, if things have not improved when you arrive?
From the Thai Meteorological Department:
http://www.tmd.go.th/index_eng.php
Dec 5-8:
During this period, people in areas of southern Thailand from Chumphon southward should aware of flood conditions.
Dec Monthly Forcast:
High pressure areas from China will cover upper Thailand throughout most of the month...For southern Thailand (east coast ),scattered thundershowers with isolated heavy falls and very heavy falls may occur in some day...The active low pressure cell in the lower Gulf of Thailand or the lower South China Sea may be active to the tropical cyclones and will move through southern Thailand, causing abundant rainfall in those areas and storm surge over the coastal areas of southern Thailand.