The 82-year-old actor will be seen coming back to the ITV soap for his character Ken Barlow to whisk wife Deirdre (Anne Kirkbride) off for a romantic trip to North Wales on a caravan holiday.
Roache, the world's longest-serving soap actor, has been off screens for more than a year, with his character said to be staying with his grandson Adam in Canada. But he is now due to begin filming in the next fortnight.
The show's executive producer, Stuart Blackburn, said: "I'm going to give Ken and Deirdre a little holiday, a caravan in North Wales. What could possibly go wrong?
"Ken raises the idea of going on holiday and she's busy scanning the papers for places in Monaco or Barbados, something like that. Then he pulls up in a hired caravan going 'Let's go to North Wales!'," he added.
The scenes, which are expected to air in the summer, will help lighten the mood on the Bafta-winning soap, following the upcoming murder of Tina McIntyre (Michelle Keegan).