The former Geordie Shore star told Heat radio the only pairs she can seeing going the distance are Scott Thomas and Kady McDermott and Nathan Massey and Cara de la Hoyde.
"I think Scott and Kady have a little bit of a chance and I think Nathan and Cara, but I don't think anyone else," said Charlotte.
When asked if she thought Alex Bowen and Olivia Buckland would, she replied: "There was a point when I really didn't think they were. There's something I think, unsure with those two so I don't know.
"Looking at last year, only one couple is still together: Cally and Luis. Not one is still together, even the strongest couple, which were Hannah and Jon, who I loved and wanted to win and thought would be together forever, aren't together now."
Cally Jane Beech and Luis Morrison are still loved up and very much together but, as Charlotte said, other couples from that series have since split.
Winners Max Morley and Jess Hayes didn't make it, while Hannah Elizabeth and Jon Clark – who became engaged on the show – also broke up.
(Max actually went on to date Charlotte!)
Love Island's latest series ended on Monday night (11 July) with Nathan and Cara winning the public vote and sharing the £50,000 prize after confirming they were in it for love, not money.
Alex and Olivia were runner up, with Scott and Kady in third place, and Adam Maxted and Katie Salmon in fourth position.