You Do Need power plug adapter while traveling from Isle of Man to Saudi Arabia.

Here is Why You Need An Adapter

The outlet and plug type used in Saudi Arabia is G and in Isle of Man are C and G. This is how they look like.

Isle of Man

In Isle of Man, outlets of type C and G are in use.

Type C

Type G

Saudi Arabia

In Saudi Arabia, outlets of type G are in use.

Type G