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

Here is Why You Need An Adapter

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

Costa Rica

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

Type A

Type B

Canary Islands

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

Type C

Type E

Type F