It is always useful to have the real time weather when going out on the boat. An excellent source for this is the Local NC! lookout, as most of them have active weather stations with an internet feed.......... they are also good for a voice radio check
Here is HENGISTBURY HEAD, covering Christchurch, its harbour entrance at Mudeford, the coast round to Hurst Spit, the Isle of Wight and The Needles, the two bays, Bournemouth beach, Poole Harbour entrance, Studland Bay, Old Harry Rocks, Swanage, Pevril Point and Durlston Head in the West ........ https://hhnci.org.uk/weather2/
Here is my local site ....................... http://www.teignmouth-nci.org.uk/live-weather
All National Coast Watch Stations (NCI) can be found here ............https://nci.org.uk/station-map