The closest beach to Elani (Kassandra) is Elani Beach, just 920 m away. Within 15 km there are 15 beaches; below are the 12 closest to Elani, ordered by distance. Photos, map, reviews.
920 m from Elani

3.7 km from Elani

6.0 km from Elani

6.4 km from Elani

8.5 km from Elani

8.5 km from Elani

8.7 km from Elani

8.7 km from Elani

8.8 km from Elani

11.1 km from Elani

11.2 km from Elani

Elani Beach, just 920 m from Elani. The rest are listed below, ordered by distance.
Within 15 km of Elani there are 15 beaches, with 25 across Kassandra in total.
Based on user reviews: Sani (★5.0), Kallithea (★4.7), Kryopigi Beach (★4.4).
The beaches are spread out around Elani. A car makes exploring much easier — local buses and taxis are limited outside peak season.
Elani is on the Kassandra side of Halkidiki, in northern Greece. The nearest airport is Thessaloniki (SKG); from there a car is the most convenient way to reach the Kassandra villages.