The Reds took a 2-0 lead before the visitors hit back to win through a Rafa Ramos double and a second-half free-kick from Steve Ramsey.
The game was played in front of a crowd of 621, the highest Wessex League attendance since the 2015/16 season.
Pictures: Michael Denyer and Sam Stephenson
. Portchester keeper Steve Mowthorpe is beaten by an Archie Willcox header that gave Fareham a 2-0 lead
Martin Denyer Photo: -
. Archie Willcox gets in front of Sam Pearce to head Fareham into a 2-0 lead
Martin Denyer Photo: -
. Archie Willcox celebrates his goal
Martin Denyer Photo: -
. Catch me if you can! Archie Willcox celebrates his goal
Martin Denyer Photo: -
. Knee-sy does it - Archie Willcox celebrates his goal
Martin Denyer Photo: -
1. Archie Willcox gets in front of Sam Pearce to head Fareham into a 2-0 lead
Martin Denyer Photo: -
2. Archie Willcox celebrates his goal
Martin Denyer Photo: -
3. Catch me if you can! Archie Willcox celebrates his goal
Martin Denyer Photo: -
4. Knee-sy does it - Archie Willcox celebrates his goal
Martin Denyer Photo: -