is there a movie?

yes there's going to be an offical h2O just add water movie to take place either after season 3 hoặc after season 4 if there is another season.
The movie is all new h2o and they haven't filmed it yet.

yes and no there are two phim chiếu rạp but they are only mash ups of episodes (one movie per season) so yes there are phim chiếu rạp but no they are not new stories just kind of a recap of the season

i think it is june hoặc july