The closest beach to Megali Panagia (Mainland Halkidiki) is Stratoni Beach, 15.1 km away. Ordered by distance from Megali Panagia. Photos, map, reviews.
15.1 km from Megali Panagia

19.7 km from Megali Panagia

21.6 km from Megali Panagia

22.6 km from Megali Panagia

22.7 km from Megali Panagia

23.9 km from Megali Panagia

24.4 km from Megali Panagia

24.4 km from Megali Panagia

25.0 km from Megali Panagia

25.4 km from Megali Panagia

25.5 km from Megali Panagia

25.8 km from Megali Panagia

Stratoni Beach, just 15.1 km from Megali Panagia. The rest are listed below, ordered by distance.
None sit within 15 km of Megali Panagia itself, but Mainland Halkidiki has 21 beaches in total — listed below, closest first.
Based on user reviews: Karagatsia (★3.8), Kalopigado (★3.8), Psakoudia Beach (★3.8).
The beaches are spread out around Megali Panagia. A car makes exploring much easier — local buses and taxis are limited outside peak season.
Megali Panagia 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.