September · Greece
Best time to visit Koufonisia in September Weather, crowds & prices
Weather in Koufonisia in September
Average temperature 25°C, 14 mm of rain, about 25 days with 6+ hours of sunshine and 72% humidity — based on the five most recent complete years of ERA5 data (2021–2025).
September score
9.8/10
Ranked #4 of 12 months
- Avg temp
- 25°C
- Rainfall
- 14 mm
- Humidity
- 72%
- Days with 6h+ sun
- 25
- Crowd Density
- Moderate Crowds
- Average Expenses
- $$$ · Peak Season Rates ($$$)
September in Koufonisia scores 9.8/10 for beach and coastal travel - an above-average month (#4 of 12). Expect around 25°C, 14 mm of rain, and roughly 25 days with 6+ hours of sunshine this month.
Koufonisia pairs Pano and Kato Koufonisi, with sandy beaches, sea caves and a tiny Cycladic harbour village.
September in Koufonisia — one of the year's strongest windows (4th)
September averages 25°C (76°F) — warm enough for beach and boat plans, still short of the heat that pushes sightseeing into early morning.
Rain is a non-issue at 14 mm for the month, with about 25 days with 6+ hours of sunshine and 12.2 hours of daylight to work with.
A 9.8/10 puts this among the year's best months in Koufonisia (4th of 12); only June scores higher, at 9.8/10.
Pack light clothing, swimwear and real sun protection.
Plan for peak pricing, with crowds are moderate.
Frequently asked
- What is the weather like in Koufonisia in September?
- In September, Koufonisia averages 25°C, 14 mm of rain, and about 25 days with 6+ hours of sunshine. Its climate-comfort score is 9.8/10.
- Is September a good time to visit Koufonisia?
- September earns a 9.8/10 climate-comfort score. Use the year-round chart to weigh the weather against your budget and crowd preferences.
- How much does it rain in Koufonisia in September?
- Expect about 14 mm of rain in September. Average humidity is 72% and there are about 25 days with 6+ hours of sunshine.
Curated in Koufonisia
Tickets & experiences
Things to do in Koufonisia
Koufonisia, Greece. Live activities and tours from GetYourGuide, matched to this destination.