September · Greece
Best time to visit Kefalonia in September Weather, crowds & prices
Weather in Kefalonia in September
Average temperature 25°C, 63 mm of rain, about 22 days with 6+ hours of sunshine and 68% humidity — based on the five most recent complete years of ERA5 data (2021–2025).
September score
9.2/10
Ranked #4 of 12 months
- Avg temp
- 25°C
- Rainfall
- 63 mm
- Humidity
- 68%
- Days with 6h+ sun
- 22
- Crowd Density
- Moderate Crowds
- Average Expenses
- $$ · Moderate Cost ($$)
September in Kefalonia scores 9.2/10 for beach and coastal travel - an above-average month (#4 of 12). Expect around 25°C, 63 mm of rain, and roughly 22 days with 6+ hours of sunshine this month.
Lush Ionian island known for dramatic Myrtos beach cliffs, subterranean Melissani lake, and colorful villages.
September in Kefalonia — one of the year's strongest windows (4th)
September averages 25°C (77°F) — warm enough for beach and boat plans, still short of the heat that pushes sightseeing into early morning.
Rainfall runs 63 mm, so plan one flexible day in three; you still get about 22 days with 6+ hours of sunshine and 12.2 hours of daylight.
A 9.2/10 puts this among the year's best months in Kefalonia (4th of 12); only August scores higher, at 10/10.
Pack light clothing, swimwear and real sun protection, a packable rain layer.
Figure on mid-season pricing, with crowds are moderate.
Frequently asked
- What is the weather like in Kefalonia in September?
- In September, Kefalonia averages 25°C, 63 mm of rain, and about 22 days with 6+ hours of sunshine. Its climate-comfort score is 9.2/10.
- Is September a good time to visit Kefalonia?
- September earns a 9.2/10 climate-comfort score. Use the year-round chart to weigh the weather against your budget and crowd preferences.
- How much does it rain in Kefalonia in September?
- Expect about 63 mm of rain in September. Average humidity is 68% and there are about 22 days with 6+ hours of sunshine.
Curated in Kefalonia
Tickets & experiences
Things to do in Kefalonia
Kefalonia, Greece. Live activities and tours from GetYourGuide, matched to this destination.