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

Here is Why You Need An Adapter

The outlet and plug type used in Costa Rica are A and B 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

Costa Rica

In Costa Rica, outlets of type A and B are in use.

Type A

Type B