A lot of good forecasting sites are available. They use different forecast models, and different ones seem to work best at different times. It’s a good idea to look at a few, find out which ones work best for you, and if available, download their apps onto your smartphone and tablet.
The RYA has a useful page for weather and tides. RYA
‘Bracknell Synoptic Charts‘ show pressure charts for NE Atlantic area for 12 hour intervals for the next 120 hours.
The Norwegian site “yr.nor” is highly recommended.
The widget below shows the current Windfinder forecast for Leith.