UK Mountain Webcams
Useful for what the weather is actually doing. Here's a few useful outdoors related ones, but this is nothing like a complete list. If any links are broken then please let me know...

Scotland

Aviemore

Aboyne

Ben Nevis

Ben Nevis North Face


Eskdalemuir



Glencoe


Isle of Mull

Kyle (and Skye if not foggy)

Loch Glascarnoch

Loch Linnhe

Loch Lomond

Nevis Range Ski Area

Oban

Skye - Cuillin Hills

Skye - towards Knoydart

Wales

Snowdon

Various Snowdonia

The Llyn Peninsula

Abersoch cams

Cardiff Bay

Lake District

Borrowdale

Coniston

Glenridding

Keswick

Seatoller

Stonethwaite

Wasdale