Climate & Weather in Ios (2026)

Pack layers for June—cool evenings are common despite warm days
July and August bring crowds, heat (sometimes 35–36°C (97°F) / 95–97°F), and premium prices; consider visiting June or September instead
Winter months (November–March) see many island businesses close and ferry schedules reduced
Sea temperature warms to comfortable swimming levels (22°C (72°F)/72°F) by October in autumn; spring water remains cool (around 16°C (61°F)/61°F in April)
Strong summer winds (Meltemi) can affect outdoor activities and may feel uncomfortable for those sensitive to wind
Spring (April–May) offers mild weather and fewer tourists, ideal for hiking and exploring the island's wildflowers

Characteristic: Island is windy year-round; Meltemi wind blows from north in summer (especially July–August), keeping temperatures moderate
Note: Wind intensity can make air feel cooler than actual temperature

Status: Rare but possible
Details: Cold air from Balkan Peninsula can occasionally bring snow in winter months

Months: July and August
Characteristics: Hot, sunny, windy with strong Meltemi wind from the north; peak tourist crowds and highest prices
Temperature Range Celsius: 25–30
Temperature Range Fahrenheit: 77–86

Mediterranean with mild, rainy winters and warm, sunny summers

Months: November to March
Characteristics: Mild, rainy with many businesses closed; limited ferry access
Temperature Range Celsius: 11–16
Temperature Range Fahrenheit: 52–61

Months: April–May and September–October
Characteristics: Pleasant weather, fewer crowds, good for both beach and hiking
Temperature Range Celsius: 16–24
Temperature Range Fahrenheit: 61–75

AI-generated estimateData refreshed July 2026

These are the sources cited in this climate & weather research for this city. Individual figures may not each trace to one of them.

More About Ios

Data last updated July 2026 · Verify anything important.