If we had to pick three reasons why you and the lads should consider a stag weekend in Lisbon, we’d say 'sun', 'sun', and 'sun'. It’s got some of the warmest winters in Europe, averaging around 15°C even in the depths of winter... at night. Head there in the summer (which, since the summer lasts around 6 months, you've got a 50% chance of doing) and you'll experience soaring heats of 25°C average. If you forced us to pick three other reasons to go, we'd suggest the sea (or the ocean, to be precise), the sand (golden and perfect for games) and the golf – Lisbon has some world class courses. And of course, if all of that wasn't enough for you, there's also the nightlife.