Are wolf spiders poisonous?

yes
They can make you sick and cause a lot of pain, but unless you are sick, elderly or very young then the bite is not too dangerous. Medical attention for a bite is still advised.
The bite of the wolf spider is poisonous but not lethal.

Wolf spiders are not poisonous but they are venomous. Though a wolf spider bite can look pretty bad and even be fairly painful, this spider's venom is not very dangerous for humans.