We had been looking forward to our stay in Benagil. While the views were amazing, we did have issues. The air conditioning never worked in either bedroom during our stay. We were notified they'd identified a compressor failure, however 2 days after we'd left. The bedrooms were 39 C by afternoon and would only reach 29 C by morning with all windows open in the entire house. Since windows had to be open, our sleep was terrible as there is activity all night on and to the beach (e.g. garbage crew cleanup at 1am, cleaning crew with leaf blowers at 3am, beach cleaning crew 4-7am, then hundreds of visitors show up and literally walk in front of bedroom window). With the windows open and all the activity, we also had a safety concern. We did not have a single good night's rest during our 4 days and found the overall stay miserable due to the heat and noise. Our daughter ended up with some sort of unidentified bug bites all over her back and arms that cleared up upon leaving. In addition, the morning sun is brutal when you'd like to enjoy the patio and view with a coffee. We'd have liked to have seen a few beach chairs and umbrellas with flat as most visitors aren't traveling with those.
The beach itself was very rough for 2 of the 4 days there and 60% of beach length was completely covered in seaweed. The surf made it unswimmable for children.
We had 4 other rentals while in Portugal and rated all 5 stars. We would not recommend this location, especially during summer.