You Do Need power plug adapter while traveling from Grenada to Azores.

Here is Why You Need An Adapter

The outlet and plug type used in Azores are B, C and F and in Grenada is G. This is how they look like.

Grenada

In Grenada, outlets of type G are in use.

Type G

Azores

In Azores, outlets of type B, C and F are in use.

Type B

Type C

Type F