Looking for underground music events/festivals in Portugal (Aug 1-5)

Hey everyone! I'll be in Portugal from August 1 to 5 and I'm looking for a small festival or event with batida, punk, or any kind of underground music scene.

If you know of any cool gigs, club nights, or festivals happening around those dates, I'd love some recommendations! Anywhere in the country, but especially around Lisbon or Porto.

Thanks in advance! peace!