The Pokémon transforms with the weather to change its type to Water, Fire, or Ice.
Forecast
Learn how Forecast works, which Pokémon can use it and how its text evolved throughout the games.
Full description
During rain, strong sunlight, or hail, this Pokémon's type changes to Water, Fire, or Ice, respectively, and its form changes to match. This ability has no effect for any Pokémon other than Castform. If the weather ends or becomes anything that does not trigger this ability, or a Pokémon with Air Lock or Cloud Nine enters battle, this Pokémon's type and form revert to their default. If this ability is lost or disabled, this Pokémon cannot change its current type and form until it regains its ability.
Effect summary
Changes Castform's type and form to match the weather.
History across games
See how this Ability and its official descriptions changed across the games.
Pokémon with Forecast
Each card combines the Pokémon identity, types and this Ability position in its available set.