OnlineWeather
Includes city, regional and national forecast for the UK and Ireland plus links to over 6000 city forecasts around the world.

The Met. Office
City, regional and national forecasts provided by the Meteorological Office, the UK's national weather service. Also provides world weather and top weather stories around the world.

BBC Weather Centre
City, regional and national forecasts plus world weather from the BBC Weather Centre with data from The Met. Office.

PA Weather Centre
This site will give you the very latest information about the weather ahead. With their radar system updated every 15 minutes, you will receive the most up-to-date information and pictures. You can also download written forecasts.

TOP INTERNATIONAL SITE

The Weather Channel
World weather forecasts from the Weather Channel in the US with forecasts on over 150 UK cities.