Cascais - Simply Superb 

Cascais is a wonderful fishing town located about 30 minutes drive from Lisbon and is a really beautiful place to spend a few hours, a day or a weekend. Cascais is where the wealthy used to take their vacations and has an exclusive feel to it but now it is very accessible and caters for everyone. If you are looking to take an extended break for a week or so in Lisbon then you should think about splitting the days between Lisbon and Cascais. 

At the harbour you’ll find a small beach which can get busy in high season but last time we were here we found a great spot to take a dip, it really is wonderful and only a short walk, so listen very carefully, I shall say this only once!!! When at the main beach in the harbour take the road out of Cascais following the sea front around by the harbour towards the lighthouse. You’ll pass by the marina and keep walking until you come to a small bridge which spans a narrow inlet. Look over the bridge on the opposite side to the sea and you will notice a small secluded beach. There are steps to get down to this little beach just at the end of the bridge on the same side. Let this be our secret!!!

You can go for lovely walks along the promenade which goes all the way to Estoril and there are plenty of bars, restaurants and cafes dotted along the route to keep you refreshed.
There is a wide variety of quality shops to browse if you need to take a break from the sun and you will be spoiled for choice of restaurants & great places to eat (don't forget your Santini Ice Cream). 

If travelling from Lisbon I recommend to take the coastal train from Cais do Sodre (station). It only takes about 35-40 minutes and you can relax without the burden of the car!