I think this is a really useful weather site, do you?
I'd be interested to know what weather sites other Bristol Channel forum members use, including the more adventurous types that go further afield than us.
My favourite is www.windfinder.com. As well as the standard 7 day forecast they do a 3 day "Super Forecast" which is taken from a more sophisticated model. I find the super forecast is generally very accurate for the Bristol Channel. I haven't tried it elsewhere.
I also have the Android app on my phone. Free for the standard forecast and loose change for the super forecast.
Always remember that the free services – Windguru, Windfinder, Passageweather, XCWeatheer, the various Apps ............. are, almost invariably, the same information re-packaged ie the GFS. Some, eg the detailed Windfinder “superforecast” starts with the GFS, adds no more data (as far as I know) then computes on a finer scale. The added value is not great.
Best advice is to use whichever of these you can get most easily in a format that you like. In terms of the information none will be of higher quality than another.