Hi I use Gribdata for forecasts up to 8 days, however, don't trust it beyond 3 days. It uses a number of weather data models which you need to experiment with. It is free for the PC and Android.
For tides I use 'Absolute Tides' for the Android, which is free to download, but the tidal data, for the whole of the UK, is about £3 per year. It has a number of other useful features like tidal graphs and streams. If you have WiFi it will also load the Inshore Weather forecast, and keep it It was voted best Tidal App for the Android a few years ago by PBO
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