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.
(..) We do not support the Sons of the Harpy. Fine, fine, but you will cut it off all the same. I do hope you accept, my friends. You will not receive a better offer. Let us sail on the tide of freedom instead of being drowned by it. And as a parting gift to our honored guests... Give freedom a chance. (..)2016 TvShow: Game of Thrones Title: Book of the Stranger Season: 6 Episode 4