The BMC team leader was on Saturday one of 47 abandons on the tough final stage of the Itzulia Basque Country (Vuelta Ciclista al Pais Vasco) which he had started in 120th position overall.
The French one-day Tour du Finistère will serve a reconnaissance purpose for Porte with the final 35km of racing mirroring Stage 5 of the Tour.
"Vuelta Ciclista al Pais Vasco was my first race in a while and it was an opportunity to get some good training in and put some solid racing kilometres in my legs," Porte said.
"Tour du Finistère will be another chance to get back into the swing of things ahead of the Tour de Romandie but it also gives us the opportunity to recon the finale of stage 5 of this year's Tour de France.
"There are not many opportunities when you get to do that in a race environment so I think it will be helpful and a good building block as we look ahead to July."
Riding alongside Porte will be Tejay van Garderen (USA), Danilo Wyss (SUI), Tom Bohli (SUI), Kilian Frankiny (SUI) and Joey Rosskopf (USA).