This is an irregular verb. It follows the conjugation pattern of the verb buscar.
PresentPresente
Yo seco los platos y mi hermano los guarda.
I dry the dishes and my brother puts them away.
FutureFuturo
El sol secará la ropa en una hora.
The sun will dry the clothes in an hour.
Present SubjunctivePresente de subjuntivo
Espero que la pintura se seque antes de la noche.
I hope the paint dries before tonight.
Imperfect SubjunctiveImperfecto de subjuntivo
Dejé la toalla al sol para que se secara pronto.
I left the towel in the sun so it would dry soon.