Halkidiki enjoys a Mediterranean climate with hot, dry summers and mild, wet winters. Its position between the Thermaic Gulf and the Aegean creates ideal conditions for seaside holidays from May through October.
| Month | Air °C | Sea °C | Rain mm | Sunshine hrs | Wind |
|---|---|---|---|---|---|
| January | 5-10 | 13 | 45 | 3 | Moderate |
| February | 6-11 | 13 | 40 | 4 | Moderate |
| March | 8-14 | 14 | 40 | 5 | Moderate |
| April | 12-19 | 16 | 35 | 7 | Light |
| May | 17-25 | 19 | 30 | 9 | Light |
| June | 22-30 | 23 | 20 | 11 | Light |
| July | 25-33 | 25 | 10 | 12 | Light |
| August | 25-33 | 26 | 10 | 11 | Light |
| September | 21-28 | 24 | 25 | 9 | Light |
| October | 15-22 | 20 | 45 | 6 | Moderate |
| November | 10-16 | 17 | 55 | 4 | Moderate |
| December | 6-12 | 15 | 50 | 3 | Moderate |
Sithonia tends to be 1-2°C cooler than Kassandra due to denser pine forest cover. The Vardaris (north wind) can bring sudden cool spells even in July.