Night Tide is listed as a horror/thriller on IMDB, but it's more a drama than anything else. So if you're looking for a horror film, then definitely look elsewhere. If you like slow burning thrillers, then you might enjoy this movie.
Night Tide stars Dennis Hopper [Land of the Dead, Easy Rider] who plays Johnny Drake, a young, naive sailor who falls in love with the mysterious Mora, a carnival worker who performs as a mermaid. Hopper is perfect for this role and his considerable talent as an actor is quite apparent even early in his career. His love interest is played by Linda Lawson whose chemistry with Hopper is wonderful.
The first half an hour is all lovey-dovey and then things get a bit mysterious when it becomes apparent that Mora might be a real mermaid who, as legend has it, lures men to their deaths during the full moon. This is not the Disney Ariel mermaid we're used to, but the true mermaid mythos that is rarely explored in movies.
Curtis Harrington [Queen of Blood, Killer Bees] does a great job of directing this film. He creates a subtle but mysterious mood that carries through much of the film. He was known for directing low budget independent horror pictures but, judging for his work here, his ability as a director is definitely underrated. He should have been offered bigger movies to direct.
Night Tide is a well made movie. My disappointment lies in that fact that I was expecting a horror film or a tense thriller. It failed on both of these accounts. But if you want drama and romance, this one will do nicely.
For more info check out the film's entry in IMDB.