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Best time to visit Kalymnos: month by month
Short answer
May, June, September and October are the best months, with highs of about 23–28°C and almost no rain. October and November are the peak climbing months, when the rock is cooler; July and August reach about 30°C and the crags are hot by mid-morning.
Month by month
| Month | High | Low | Rainy days | Crowds |
|---|---|---|---|---|
| Jan | 15°C | 11°C | 15 | low |
| Feb | 15°C | 10°C | 7 | low |
| Mar | 15°C | 11°C | 9 | low |
| Apr | 19°C | 14°C | 6 | medium |
| May | 23°C | 18°C | 4 | medium |
| Jun | 27°C | 22°C | 2 | medium |
| Jul | 30°C | 24°C | 0 | high |
| Aug | 30°C | 25°C | 0 | high |
| Sep | 28°C | 23°C | 1 | high |
| Oct | 23°C | 19°C | 2 | high |
| Nov | 21°C | 16°C | 11 | medium |
| Dec | 17°C | 14°C | 10 | low |
Temperatures and rainy days: Copernicus ERA5 averages, 2021–2023. Crowd levels are our estimate.
Season by season
Spring (Mar–May)
About 15°C in March rising to 23°C in May, with rain on 4–9 days a month; good for walking and climbing, sea still cool.
Summer (Jun–Aug)
About 27–30°C and almost no rain; warm sea, meltemi winds and hot crags.
Autumn (Sep–Nov)
About 28°C in September, 23°C in October and 21°C in November; the main climbing season, with the sea still warm into October and more rain from November.
Winter (Dec–Feb)
About 15–17°C by day with rain on 7–15 days a month; quiet, and many west-coast businesses are closed.
Events worth planning around
- Greek Orthodox Easter (March, April or May), celebrated very loudly on Kalymnos
- Feast of the Dormition, 15 August, a national holiday with village celebrations
When to avoid
Avoid July and August if you come to climb, as the walls are too hot for much of the day; avoid December to February if you want the west coast open.
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Common questions
What is the best time to visit Kalymnos?
May, June, September and October; October and November for climbing.
Is Kalymnos open in winter?
Pothia stays open, but many west-coast tavernas close from about November to March.
Is August too hot for climbing?
Usually yes; highs are about 30°C and walls are hot by mid-morning, so climb very early or choose shaded crags.