What to buy: I've said it before and i'll say it again, take a hat, UV resistant clothing and plenty of water resistant sunscreen. Don't forget sunglasses too, we removed ours for the photos which is why we are squinting in most of them.
What to buy:
Get the lot! You will need a hat,sunglasses, sun screen (waterproof is recommended, i burned my feet and ankles when the sea washed my regular lotion off ) and UV resistant clothing, it is widely available now, even in the UK, and more so in Australia.
It was a cloudy day when we got married but we still tanned, take care out there.