Being close to TARIFA, this part of the coast is particularily windy. Is not windy all the time, but when the "Levante" wind blows, you better do some windsurfing... or go on a daytrip to a nearby village in the "Sierra de los Pueblos Blancos" (White villages mountains).
Is really annoying to stay at the beach and get hit by the sand all the time...
If you plan to climb up the dune, put some sun protection first and wear a hat or so, is really hot up there and there is no shade around!
Climbing up the dune may take you 10-15 minutes. The sand is really hot up there, so U better take some beach sandals just in case... or climb it after sunset!