Sithonia weather by month: air and sea temperatures, rain and sunshine
The full monthly table for Sithonia, Halkidiki's middle finger: when the sea is warm, when it rains and when to stay away.
- Beach season: June to September, with the sea at 23–26°C.
- Winters are colder than on the southern islands: highs of about 9–11°C in December–January.
- September is excellent: 26°C air, 24°C sea and fewer crowds.
For a beach holiday in Sithonia aim for June to September. April–May and October are pleasant for touring, but the sea is still (or already) cool.
What is the weather like in Sithonia?
Sithonia is the middle of Halkidiki's three "fingers" in northern Greece: greener and wilder than Kassandra, with coves, pine forests and clear water. The climate is Mediterranean, but this is the north, so winters are colder than in Crete or Rhodes and summer evenings are milder.
Sithonia weather by month
Long-term averages from Weather2Travel for Neos Marmaras, Sithonia's main resort.
| Month | Max (°C) | Min (°C) | Sea (°C) | Rain days | Sun hours/day |
|---|---|---|---|---|---|
| Jan | 9 | 2 | 13 | 9 | 4 |
| Feb | 10 | 3 | 13 | 8 | 5 |
| Mar | 13 | 5 | 13 | 8 | 6 |
| Apr | 18 | 8 | 14 | 8 | 8 |
| May | 23 | 12 | 18 | 8 | 9 |
| Jun | 27 | 16 | 23 | 5 | 11 |
| Jul | 30 | 18 | 25 | 4 | 12 |
| Aug | 29 | 18 | 26 | 4 | 11 |
| Sep | 26 | 15 | 24 | 4 | 9 |
| Oct | 20 | 11 | 21 | 6 | 6 |
| Nov | 15 | 7 | 17 | 8 | 4 |
| Dec | 11 | 4 | 15 | 9 | 4 |
When is the best time to visit Sithonia?
- June: 27°C, sea at 23°C, long days and fewer crowds than August.
- July–August: peak season, 29–30°C and a 25–26°C sea, but peak prices and crowds too; many northern Greeks holiday here.
- September: for many the best month: still warm (26°C), the sea at its warmest (24°C) and emptier beaches.
- October: 20°C and a 21°C sea. Fine for walks and swimming on sunny days, but some hotels and tavernas close for the season.
- November–March: fairly cold, and much of the tourist trade is shut. Not a beach option.
Sithonia in September and over the Jewish holidays
The autumn holidays often fall in September–October, a good time for Sithonia: a warm sea and fewer people. By late October it cools down, so a late holiday suits touring more than the beach. Comparing with the neighbouring finger? Read Kassandra or Sithonia.
Tips
- Wind: some summer days bring a cooling wind; pick a sheltered beach for the wind direction.
- Car: the best beaches are spread along the whole peninsula, so a hire car is almost essential.
- Shabbat and kosher: candle-lighting times on our Shabbat times & kosher page; food tips in kosher and Shabbat in Halkidiki.
More: the Halkidiki destination page, the complete Halkidiki guide and Greece weather.
FAQ
When is the sea warmest in Sithonia? In August, at about 26°C on average. In July and September it is around 24–25°C.
Can you swim in Sithonia in October? Yes, on sunny days. The average sea temperature in October is about 21°C: cool but fine for most people.
How many rainy days does Sithonia have in summer? Few: about 4–5 days a month with some rain from June to September, usually short showers.
Is Sithonia cold in winter? Fairly. In January the average high is about 9°C and the low about 2°C.
