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Best time to visit Ios: month by month
Short answer
June and September are best, with highs of about 27°C, a warm sea and fewer crowds. July and August are the hottest (about 30°C) and busiest months, with young travellers, loud nights in Chora and the meltemi wind.
Month by month
| Month | High | Low | Rainy days | Crowds |
|---|---|---|---|---|
| Jan | 15°C | 11°C | 12 | low |
| Feb | 15°C | 11°C | 6 | low |
| Mar | 15°C | 11°C | 9 | low |
| Apr | 19°C | 14°C | 5 | low |
| May | 23°C | 17°C | 4 | medium |
| Jun | 27°C | 21°C | 2 | high |
| Jul | 30°C | 24°C | 1 | very high |
| Aug | 30°C | 24°C | 1 | very high |
| Sep | 27°C | 22°C | 1 | high |
| Oct | 23°C | 19°C | 1 | low |
| Nov | 20°C | 16°C | 5 | low |
| Dec | 17°C | 13°C | 7 | low |
Temperatures and rainy days: Copernicus ERA5 averages, 2021–2023. Crowd levels are our estimate.
Season by season
Spring (Mar–May)
Mild to warm, about 15°C in March, 19°C in April and 23°C in May; many places open from May and the sea is still cool.
Summer (Jun–Aug)
About 27–30°C with almost no rain; warm sea, busy beaches and lively nightlife, especially in the first half of August.
Autumn (Sep–Nov)
September (about 27°C) is warm and calm; October (about 23°C) is quiet, and many tavernas close after mid-October.
Winter (Dec–Feb)
Cool, about 15–17°C, with rain on 6–12 days a month; most hotels and tavernas close and ferries are less frequent.
Events worth planning around
- Greek Orthodox Easter (March, April or May)
- Summer concerts at the Odysseas Elytis Theatre in Chora (July–August; check the programme)
- Feast of the Assumption (15 August)
When to avoid
Avoid the first half of August if you want quiet nights, and November to April if you want open hotels and frequent ferries.
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Common questions
What is the best time to visit Ios?
June and September.
When is Ios busiest?
July and August, especially the first half of August.
Is Ios open in winter?
Mostly closed: from November to April most hotels and tavernas shut and ferries are fewer.