South Aegean is Greece's island paradise, encompassing the stunning Cyclades and Dodecanese archipelagos in the heart of the Mediterranean. From the iconic whitewashed clifftop villages of Santorini and the glamorous shores of Mykonos to the medieval walled city of Rhodes and the archaeological wonders of Delos, this region offers an unparalleled blend of ancient history, natural beauty, and vibrant island culture.
The South Aegean enjoys a classic Mediterranean climate characterized by long, hot, dry summers (June-September) and mild, wet winters (November-March). The meltemi — a strong northerly wind — blows persistently in July and August, cooling the intense summer heat but sometimes disrupting ferry schedules. Annual rainfall is low (300-400mm, mostly October-March). The Dodecanese islands in the southeast are slightly warmer and drier than the Cyclades.
Best time to visit
Best: May, June, September, October
Best Reason: Warm, sunny weather (22-28°C) with clear Aegean seas, fewer crowds than peak summer, lower prices, and most attractions fully open. September is particularly perfect — sea temperatures reach their warmest and the harsh summer heat has subsided.
Peak Season: July, August
Avoid: November to March for beach and island activities
Avoid Reason: Many hotels, restaurants, and ferry services on smaller islands close entirely from November to March. Weather is mild but can be rainy and windy. The sea is too cold for swimming.
Month-by-month weather
Typical conditions throughout the year.
January
12°C / 54°F
Mild by European standards but quiet — most tourist venues closed on smaller islands. Rhodes and Kos have some activity.
February
12°C / 54°F
Still quiet but almond trees begin to blossom. Pre-season prices on any open accommodation.
March
14°C / 57°F
Spring begins, wildflowers emerge, and some businesses reopen for Easter. Cool but refreshing.
April
17°C / 63°F
Excellent sightseeing weather, green landscapes, Orthodox Easter celebrations. Uncrowded archaeological sites.
May
22°C / 72°F
Warm, sunny, and beautiful. Sea warming up. Most businesses open. Ideal conditions with manageable crowds.
June
26°C / 79°F
First proper summer month. Hot sunny days, warm sea. Crowds building but not yet at peak. Excellent month to visit.
July
29°C / 84°F
Peak summer. Very hot, meltemi winds strong. Beaches packed, ferries crowded, accommodation at maximum prices.
August
30°C / 86°F
Hottest month, peak of tourist season. Extraordinary energy in Mykonos and Santorini but everything costs maximum.
September
26°C / 79°F
Many consider this the best month — warm sea (26°C), hot days, fewer crowds, lower prices. Perfect conditions.
October
21°C / 70°F
Warm and sunny early in the month. Sea still swimmable. Crowds diminish, authentic atmosphere returns.
November
17°C / 63°F
Season ending. First significant autumn rains. Many smaller island businesses closed for winter.
December
14°C / 57°F
Quiet winter. Rhodes and Kos have some life with Christmas celebrations. Very authentic experience.
The seasons
What to expect in each part of the year.
Spring
Months: Mar-May
Spring arrives early in the South Aegean, with wildflowers carpeting the hillsides from March and temperatures climbing steadily. April and May are ideal for sightseeing and hiking before the summer heat. The sea is still cool (17-19°C) for swimming but beaches are uncrowded.
Summer
Months: Jun-Sep
The long Aegean summer brings blazing sunshine, sea temperatures of 24-27°C, and the full carnival of island tourism. July and August are extreme — temperatures exceed 35°C and Santorini and Mykonos are overwhelmed with visitors. The meltemi wind provides some relief but can be very strong. September is many visitors' favorite month.
Fall
Months: Oct-Nov
October is still pleasant with temperatures of 20-24°C and a warm sea. The tourist season winds down, locals reclaim their islands, and authentic experiences become easier to find. November brings cooling temperatures and the first autumn rains. Many businesses begin closing for winter.
Winter
Months: Dec-Feb
South Aegean winters are mild compared to northern Europe (10-16°C) but many smaller islands become very quiet with most tourist-oriented businesses closed. Rhodes and Kos remain the most active year-round, with a domestic Greek tourism scene. The sea is cold (15-16°C) and unsuitable for swimming.
Crowds & peak times
When to expect tourists and when to avoid them.
- High Season
- July-August
- Shoulder Season
- May-June and September-October
- Low Season
- November-March
Major events & festivals
Time your visit around what matters.
Greek Orthodox Easter
The most important festival in Greece. Dramatic midnight church services, fireworks, and lamb roasts on Easter Sunday. Fira (Santorini) has particularly spectacular celebrations.
Dekapentavgoustos (Dormition of the Virgin)
Greece's biggest summer holiday. Massive celebrations across all islands with panigiri (village festivals), traditional music, and dancing. Many Greeks return home from cities.
Aegean Festival, Epidavros
Ancient Greek theater performances (on mainland but popular excursion from islands).
Meltemi Season
Not an event but a weather phenomenon — the strong northerly Meltemi winds define summer island life, cooling the heat but occasionally disrupting ferries.
Santorini Jazz Festival
Annual jazz performances in the atmospheric setting of Santorini's Nomikos Conference Center.
Ochi Day (October 28)
National holiday commemorating Greece's refusal of the Italian ultimatum in 1940. Military parades in main towns.