In a special seven-episode story arc, Vince (Richard Donat) and Dave (John Dunsworth) will join Twitter under the account names @VinceHaven and @DaveHaven.
Viewers will then be able to follow the characters online as they interact with a mysterious third user @ColdInHaven, who holds a secret about the town of Haven.
"The Haven writers and producers have done an amazing job of crafting a storyline that seamlessly moves between the TV show and Twitter," said Syfy Digital's Senior Vice President Craig Engler.
"Although there have been simple integrations before, no-one has fully and organically integrated Twitter into the fabric of the show in the way Haven is doing. If you watch Haven and use Twitter, you're in for a real treat."
Haven's executive producer Lloyd Segan also insisted that fans of the show will not need to follow the Twitter accounts to understand the television series.
"The story has been created in such a way that viewers who don't follow the Twitter plot can still enjoy the show," he explained. "[But] for those that do, there will be a special meaning to events in Haven during these seven episodes."
The special Haven story arc begins with the fifth episode of the second season, airing this Friday at 10/9c on Syfy.
> Haven Emily Rose: 'New season is darker'
> Haven star teases second season