Bari has confirmed on their website that the Norway international is set to join the Championship side.
Huseklepp told Norwegian newspaper BA: “I will have a medical tomorrow, so we’ll see how it goes. I will not take anything for granted, but hopefully everything is in order.
“I have enjoyed my stay at Bari, but it is clear that playing in the Serie B was not what I wanted. I think Portmouth is a better option.”
Huseklepp has reportedly agreed on a three-year contract worth around £1million per year with Pompey.
