Rory McIlroy -- Hits Beach with Hot Fiancee (PHOTO)

Hope someone remembered the SPF 3000!

Here's golf superstar Rory McIlroy catching some rays in Barbados with his fiancee Erica Stoll ... trying to carefully fill in some of that t-shirt tan he got on the links.

Rory and Erica -- who works for the PGA -- got engaged back in December. No word on when the wedding will be.