One that I find useful in the run up to the weekend's training flight is
WeatherWeb.net. For some reason though the Weekend Aviation VFR Forecast has not been updated in a number of weeks (or maybe it's just me!!).
Also through this website you can register with AWIS (Aviation Weather Information Service) who send an email on a daily basis with a breakdown of the weather in basic terms.. I'll get round to studying Met one of these days!!
Safe flying folks..