The closest beach to Sanos (Mainland Halkidiki) is Stratoni Beach, 20.6 km away. Ordered by distance from Sanos. Photos, map, reviews.
20.6 km from Sanos

25.2 km from Sanos

32.9 km from Sanos

34.7 km from Sanos

35.6 km from Sanos

35.7 km from Sanos

36.9 km from Sanos

37.2 km from Sanos

37.5 km from Sanos

38.0 km from Sanos

38.2 km from Sanos

38.3 km from Sanos

Stratoni Beach, just 20.6 km from Sanos. The rest are listed below, ordered by distance.
None sit within 15 km of Sanos itself, but Mainland Halkidiki has 21 beaches in total — listed below, closest first.
Based on user reviews: Psakoudia Beach (★3.8), Karagatsia (★3.8), Kalopigado (★3.8).
The beaches are spread out around Sanos. A car makes exploring much easier — local buses and taxis are limited outside peak season.
Sanos is on the Mainland Halkidiki side of Halkidiki, in northern Greece. The nearest airport is Thessaloniki (SKG); from there a car is the most convenient way to reach the Mainland Halkidiki villages.