es peligroso nadar en

it is dangerous to swim in

→ ser
phrase Rare #37,445
it is dangerous to swim in Used to warn that swimming in a particular place is unsafe. The phrase is usually followed by a place or body of water.
SP: Es peligroso nadar en el mar durante la tormenta.
EN: It is dangerous to swim in the sea during the storm.

Es peligroso nadar en la laguna.

It is dangerous to swim in the lagoon.

Es peligroso nadar en ese río.

It's dangerous to swim in that river.

Creo que es peligroso nadar en este lago.

I think it’s dangerous to swim in this lake.

Es peligroso nadar en la noche.

It is dangerous to swim at night.

Pienso que es peligroso nadar en ese río.

I think it’s dangerous to swim in that river.

Es peligroso nadar en este lago.

It is dangerous to swim in this lake.