You Do Need power plug adapter while traveling from Canary Islands to Thailand.

Here is Why You Need An Adapter

The outlet and plug type used in Thailand are A, B, C and O and in Canary Islands are C, E and F. This is how they look like.

Canary Islands

In Canary Islands, outlets of type C, E and F are in use.

Type C

Type E

Type F

Thailand

In Thailand, outlets of type A, B, C and O are in use.

Type A

Type B

Type C

Type O