Be prepared to heavy snow falls, if your car has heating better, if it don?t it is better you have some warm clods and some blankets in case if you were trapped 7 hours like i did.
If your car has chains you will not have problem, if you hadn?t, you have to wait until the snow clean car come rescue you.
You should be very careful because the drive is very difficult in this conditions, if you had no chains, take the right distance from the car that is in front of you because it is very easy to beat on its back.
I took this photo to show you that it was very cold outside, in that moment it was -2?C, fortunately we had heating on the car and it was 20?C inside.
It was very nice to go out and play with snow, but it was very cold and we were not prepared to that, so staying in the car it was much better.
Most roads on the mountain are narrow and winding. You should be careful when driving, as the roads are frequently built on the hedge of huge cliffs. If driving in snowing season watch out for ice on the road, as it can be quiet dangerous. Sometimes roads are closed due to snow, so check ahead for road conditions.
Snow is not common in Portugal, and even in those places where it uses to fall it is so rare and quick that we don't prepare our cars for it. That's why, travelling to Estrela we must be careful with the weather.
We were caught in April by an unexpected snowfall, and getting down was a nightmare, here and there pushing or pulling the cars by hand. No serious problem, no one was blocked, but...