We have reserved a few rooms at the Sana Hotel in Sesimbra. It's very close to the wedding location and there will be transport available to come back from the wedding to the hotel. There are 10 double rooms available at €142 per night and 5 double rooms with view to the sea at €162 per night both with breakfast included. The rate is only valid if you book two nights. The rooms will be reserved until the 3rd of June so book it early. Use the link below to make the reservation with the discount.

This is another nice hotel in Sesimbra as well that starts at €110 per night and it includes breakfast and has a swimming pool.

A little bit more upscale, this is another good option if you want a luxurious weekend. The prices per double room start at €233 a night with breakfast included. Check on booking.com as they might have some discounts sometimes.