On Friday 6th September Usk Astronomical Society in association with CADW, the Brecon Beacons National Park and Visit Wales will be hosting a stargazing event at Tretower Court, near Crickhowell. More detail can be found at this link including admission prices and how to buy tickets.
Hopefully the weather will be kind and Jupiter and Saturn will be on show, but even if the weather does not cooperate there will still be plenty to do. There will be a pop-up planetarium, talks and a bat walk.
The event starts at around 17:30 but viewing the night sky of course will not begin until twilight when Jupiter hopefully will emerge.