- During harsh sunlight or extremely harsh sunlight, it will become Sunny Form, which is Fire-type.
- During hail, it will become Snowy Form, which is Ice-type.
- During rain or heavy rain, it will become Rainy Form, which is Water-type.
- During a sandstorm, fog, strong winds, a shadowy aura, or clear weather it will revert to its normal form, which is Normal-type.
This Ability has no effect on Pokémon other than Castform.
Forecast does not change Castform's form until after Stealth Rock deals damage.
If a Pokémon transforms into Castform with Forecast, it will change forms with the weather just like Castform.
If Castform or a Pokémon transformed into Castform loses Forecast, it will be stuck in its current form. When it regains Forecast, it will change to the form matching the current weather, even if it is already in the correct form (which resets its type if it had changed due to an effect like Color Change).
If Forecast is suppressed with Gastro Acid, it will be stuck in its current form.
Forecast cannot be copied by Trace.
Generation V onward
If a Pokémon transforms into Castform, the Pokémon will remain in the same form as the target Castform, regardless of the weather.
If Castform loses Forecast or Forecast is suppressed with Gastro Acid, it will revert to its normal form and not be able to change form. If Castform regains Forecast, it will change form to match the current weather, unless it would be in its normal form in the current weather.
Outside of battle
Forecast has no effect outside of battle.
Pokémon with Forecast
|#||Pokémon||Types||First Ability||Second Ability||Hidden Ability|
|Please note that this is only 100% accurate to Generation IX games.
In other games
In the anime
|Castform in harsh sunlight||Castform while raining||Castform activating Forecast||Castform activating Forecast|
|Castform's body glows and changes to an alternate form depending on the weather.|
|User||First Used In||Notes|
|Castform||Castform's body glows white when the weather is calm and it transforms into its Normal Form.|
|Bart's Castform||Unfair Weather Friends||Debut|
|Castform||Castform's body glows blue when it starts to rain and it transforms into its Rainy Form.|
|Bart's Castform||Unfair Weather Friends||Water type|
|Castform||Castform's body glows red or white when there isn't a cloud in the sky and it transforms into its Sunny Form.|
|Bart's Castform||Unfair Weather Friends||Fire type|
|An ally Castform||Currying Favor and Flavor!||Fire type|
|Castform||Castform's body glows blue when it starts to snow and it transforms into its Snowy Form.|
|A Trainer's Castform||Mounting an Electrifying Charge!||Ice type|
In the manga
|Normal Form||Sunny Form||Snowy Form||Rainy Form|
|The Pokémon transforms with the weather to change its type to Water, Fire, or Ice.|
|User||First Chapter Used In||Notes|
|Castform||Castform's head becomes surrounded in a transparent shape depending on the form that it will take and it transforms its body depending on the weather.|
|Ruby's Fofo||Mowing Down Ludicolo||Debut|
- In Pokémon XD: Gale of Darkness, while Castform transforms, a Trainer will play the animation used if one of their Pokémon faints.
In other languages
|Abilities affected by weather conditions|
|Sand Veil • Swift Swim • Chlorophyll • Forecast • Dry Skin • Rain Dish • Snow Cloak • Hydration • Solar Power • Leaf Guard • Ice Body • Flower Gift • Sand Force • Sand Rush • Slush Rush|
|This article is part of Project Moves and Abilities, a Bulbapedia project that aims to write comprehensive articles on two related aspects of the Pokémon games.|