15 days in Portugal in July - need planning help

I like your itinerary as it stands. The Algarve will be hideously busy in late July with families heading to the beach and the best accommodation will have been taken months ago. Salema has been ruined by over development. Stay north.

I also don’t care for Nazaré, particularly in peak season. I would prefer to stay in Caldas da Rainha, which is a good base for the area that has some character.

Day 9 you could add Tomar.

Aveiro - see on day 13 en route to Porto.

You have an excellent itinerary! I would not go south to Algarve in July. It will be mobbed plus hot.

Kudos for not including the Algarve. So many people think they must see it, and shortchange other areas.

I also am not fond of Nazare. Another option might be São Martinho do Porto, which is very close. From it you can visit all the places you mention.
When in Coimbrã, GoWalks does a very nice walking tour which includes the university and library. It’s very reasonable and a good way to see the Coimbrã highlights.

Thanks RJean, Kathleen, Jennifer, Suki and kathrynj for all the wonderful suggestions. I am getting close to settling on my plans - might tweak a little based on hotels and Airbnb availability.

July 13 - Day 1 : Fly into Lisbon late afternoon (sleep in Lisbon)
July 14 - Day 2: Lisbon (sleep in Lisbon)
July 15 - Day 3: Day trip to Sintra (sleep in Lisbon)
July 16 - Day 4: Day trip to Cascais and Estoril (sleep in Lisbon)

July 17- Day 5: Drive to Evora from Lisbon (sleep in Evora)
July 18 - Day 6: Evora (sleep in Évora)

July 19 - Day 7: Drive to Obidos from Evora (sleep in Obidos- Caldas da Rainha or Sao Martinho do Porto)
July 20 - Day 8: Obidos - Do a few of these or all Alcobaca , Batalha, Fatima , Tomar (sleep in Obidos- Caldas da Rainha or Sao Martinho do Porto)
July 21 - Day 9: Obidos day trip to Nazare (sleep in Obidos- Caldas da Rainha or Sao Martinho do Porto)

July 22 - Day 10: Drive to Douro Valley from Obidos with a stopover in Conimbriga (Condeixa-a-Nova) (sleep in town of Lamego in Douro Valley)
July 23 - Day 11: Lamego - Explore other towns in Douro Valley like Pinhão, Bitetos etc (sleep in Lamego)

July 24 - Day 12: Drive to Porto from Lamego (sleep in Porto)
July 25 - Day 13: Porto (sleep in Porto)
July 26 - Day 14: Porto (sleep in Porto)
July 27 - Day 15: Fly home

I would add an extra day to Lisbon. Right now you have only one full day in Lisbon because of the 2 day trips you have planned. Lisbon is a wonderful city with lots of interesting and important sites, in addition to just wandering and enjoying the ambiance and relaxing with a drink at one of the miradouros.

You don't need two nights in Evora. Do it on a day trip from Lisbon.

Too many days in Nazare.

Consider adding Obidos (with ancient Roman walls) and Batilha Cathedral.

Consider the In Patio Guesthouse in Porto, it is fantastic.

Are you planning to visit the Douro River Valley? Consider taking a short cruise and/or the train.

Thanks again for help shape the itinerary

Day 1 : Fly into Lisbon late afternoon (sleep in Lisbon)
Day 2: Explore Lisbon (sleep in Lisbon)
Day 3: Explore Lisbon (sleep in Lisbon) Day 4: Day trip to Sintra from Lisbon (sleep in Lisbon) Day 5: Day trip to Cascais and Estoril from Lisbon (sleep in Lisbon) Day 6: Day trip to Evora from Lisbon (sleep in Lisbon)

Day 7: Drive to Obidos from Lisbon (sleep in Sao Martinho do Porto) Day 8: Obidos - Explore a few of Alcobaca , Batalha, Fatima , Tomar, Nazare (sleep in Sao Martinho do Porto) Day 9: Obidos- Explore a few of Alcobaca , Batalha, Fatima , Tomar , Nazare (sleep in Sao Martinho do Porto)

Day 10: Drive to Coimbra - Explore Conimbriga (Condeixa-a-Nova) and Coimbra university and library(sleep in Coimbra)

Day 11: Lamego - Explore Lamego (sleep in Lamego) Day 12: Lamego - Explore other towns in Douro Valley like Pinhão, Bitetos etc (sleep in Lamego)

Day 13: Porto (sleep in Porto) Day 14: Porto (sleep in Porto)

Day 15: Fly home in the morning