As you'll know, it's open to the public. I took my kids there years ago. There was some darned impressive Welsh drizzle for the whole time which we were told is typical.
Dunno how the filming crews worked around that.
If I go again I'll look up the locations and have myself photographed looking
enigmatic rather than
wet through.
(We were staying near the dangerous Black Rock Sands beach where the Manic Street Preachers had their photo taken, and where I once nearly drowned us all when I didn't notice the tide sneak up behind us.
)