Any info would be great guys thanks.

Is it possible to rent one from a local hotel even?

Yes, there is a place on Soi 10 in between beach road / 2nd road. If you go there let us know how much it is

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The yellow T money exchange place on 2nd Rd directly opposite the old Mike department store does (did) safe deposit rentals. Not exactly in Soi Buakow I know, but only a short walk.

i remember few years ago, i was spending few days in phuket, and wanted to rent also a safe.... the girl asked 3 times,

yes 3 times if i gonna put my credit card in the safe... you guess what...

Are you staying on Buakhao? Does the Hotel not have safes in your room? If not you might be better moving to one that does. If you actually have your own place then you can buy decent safes (small) for 3,500 baht and have it bolted into your floor or wherever.

if you go from the tukcom end past action st and the tesco lotus on the left there are a couple of exchanges on the right with bright yellow signs you cant miss that say they rent safes