I use these, mostly for checking Scotland

• XCWeather
  
• MWIS
  
• Nice website, not tried it much though: https://www.windy.com/
• SAIS
  
• https://trafficscotland.org/map/index.aspx?type=26
• https://www.yr.no/place/United_Kingdom/Scotland/Edinburgh/hour_by_hour.html
  

• A selection of Scottish mountain cams
  
• Glen Coe
  
• Nevis Range
  
• Cairngorm
• Glenshee
  
• The Lecht
  
• http://webcam.firbush.org/webcam.jpg <-- points towards Lawers
• https://www.eastsidecottages.co.uk/webcam