The map below shows the beach locations:
The nearest beaches are:
Torre Conca (aka Valtur) - Sandy Beach - 5 minutes drive away
Santa Maria - Pebble Beach - 7 minutes drive away
Cefalu Lungomare - Golden Sandy Beach - 15 minutes drive away
Torre Conca (aka Valtur):
A five minute drive from the house heading towards Cefalù you'll see a parking on your left. It's reasonably cheap (about €1 for the day) and there's a pedestrian underpass to walk down the hill to the beach. In high season there's a small bar and Paninoteca (hot Panini), and you can hire pedal boats. A favourite beach for snorkelling and swimming, and you can watch the sun set into the sea in the evening.
A bit further beyond the Torre Conca you'll see some cars parked by the roadside just before the train level crossing. Find a place to park (keep inside the white lines) and walk down the few steps to the beach. It's a small pebbly beach with clear blue water around the rocks in the water.
If golden sand is what you're after this is the place to go. There's the public beach (no charge) or for about €15 you can hire a spot for the day on one of the private parts of the beach (eg Lido Poseidon), which includes sun umbrellas and sun loungers. It's worth it for the luxury of having toilets, showers, restaurant and bar at your disposal.