Politically, she tends to 'go against the tide' on her college campus. [=she tends to have different political opinions than most people on her college campus]
He became involved in social issues at the 'high tide' of the civil rights movement. [=at the most active and important time of the civil rights movement]
The team was on a losing streak, but then 'the tide turned' [=their luck changed] and they went on to win the championship.
(..) The week end? No. Does Aunt Irma visit on the week end? - Moss! - You know, it... it's high tide... - But we're not on the coast. - Moss! I'm closed for maintenance. - Closed for maintenance? - Moss! (..)2006 TvShow: The IT Crowd Title: Aunt Irma Visits Season: 1 Episode 6