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

Here is Why You Need An Adapter

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

Namibia

In Namibia, outlets of type D and M are in use.

Type D

Type M

Azores

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

Type B

Type C

Type F