I'm guessing you were there either in early May, or more likely late August/early September and happened to chance on a bit of honey buzzard movement. Honeys are exceptional for several reasons, including their intense arrival and departure seasons. The main reason is that unlike most other raptors that need to concentrate on the immediate vicinity of the Strait to take advantage of the short sea crossing, honeys couldn't really give a stuff. They like a short crossing, but they will also set out on a broad front and brave a long crossing. They have the strength to do it.
I was on the Strait until last weekend and after a good Honey movement on 6th/7th, they tapered off considerably. Other raptors, especially griffons were coming in, but all on a narrow front restricted to the area between Gibraltar and Tarifa.
By June as referred to in the initial query, I wouldn't expect to see any migration movement at Benalmadena, or even anywhere else. It's just too far from the Strait, and everything will be through in any case. Best bets are to look to the local small stuff, with forays to Guadalhorce and points north of Malaga, such as El Torcal de Antequera and Laguna de Fuente de Piedra and the surrounding area, but a car will be needed for these. Further east I've heard that there are white-rumped swifts at Almuñecar, but I don't have detail of their location there.
Montes de Malaga, inland from Velez-Malaga should be good for stuff such as Iberian grey shrike, Chough and other upland species.
