The month in detail
What to expect in September
Autumn in Kefalonia is often underrated: 81°F, golden light and declining crowds. An interesting window. Rain is virtually absent (10% of days) — ideal for planning without a backup. A good balance between weather and crowds, even if June (9.3/10) remains theoretically better.
September ranks 2 out of 12 months in Kefalonia. Compared to August: −5°F daytime, 7 pts more rainy days, −1.6h of sun per day.
This month's conditions
What it's like in September
UV index
6 · high
sunscreen and hat advised
Feels like
muggy at times
19°
Sea
25°C
pleasant for swimming
Daylight
12.2h of daylight
Air quality
good
AQI 34
Compare
Is September the right month?
The best month in Kefalonia is June (9.3/10), 0.5 pt higher than September.
Book
Plan your trip
Hotels at their lowest outside peak season, highest on comfortable months. Shoulder seasons offer a good price/climate compromise.
Stay
Hotels & rentals · Kefalonia
Expedia →
Activities
Tours, tickets, experiences
See ↓
Flights
Multi-airline comparator
Kiwi →
🎟️ Activities & tours · Kefalonia
GetYourGuide selection · free cancellation
Practical info
What you need to know before you go
Three angles: the country (language, currency, safety, budget), the year-round climate, and the specifics of a beach trip.
Country · Greece
🗣️LanguageGreek
💶CurrencyEuro (€)
🚗DrivingRight-hand
🛡️Safety ⓘVery safe · 1/5
💰Cost of living ⓘModerate · 3/5
🌡️ Climate
🌍Climate typeTemperate oceanic
📈Climate trendData unavailable
🔥Hottest monthJuly · 86°F
❄️Coolest monthJanuary · 57°F
🌧️Rainiest month ⓘDecember · 39%
🏖️ Beach trip
📅Peak seasonJuin → Sept
🏖️Swell (Sept–Mar) ⓘModérée
🛂VisaSchengen · 90 days
Explore
Other destinations in September
If September doesn't convince you for this destination, compare with others.
Location
Where is Kefalonia ?
Global position + regional geographic context.
🌍 World
🔍 Geographic context
GreeceTemperate oceanic climate with a 9.3 → 4.2 gap between best and worst month. 10 years of ERA5 data to choose by project.
38.18°N · 20.49°E
Questions
Frequently asked questions
What is the best time to visit Kefalonia?
June is the best month with 81°F highs, 70°F lows, 9.3h of sunshine and 3.0% rainy days. The months of June & September offer comparable conditions.
How many hours of sunshine does Kefalonia get in June?
Kefalonia averages 9.3 sunshine hours per day in June. It is the sunniest month with a climate score of 9.1/10.
What is the rainiest month in Kefalonia?
January is the most unfavourable month with January has the lowest climate score of the year and the lowest climate score of the year.
What are the temperatures at night in Kefalonia in June?
In June, overnight lows reach 70°F, while afternoon highs average 81°F.
Is Kefalonia good in winter?
In winter (December-February), Kefalonia scores 4.1/10 on average — Difficult period — prefer the peak season.. The best month overall remains June with a score of 9.1/10.
When should you avoid Kefalonia?
January is the most difficult month to visit Kefalonia, with January has the lowest climate score of the year. Climate conditions are at their lowest of the year during this period.
Can you swim in Kefalonia in September?
In September, the sea averages 77°F in Kefalonia: pleasant for swimming. Swimming is pleasant without a wetsuit.
Do you need sun protection in Kefalonia in September?
The average UV index reaches 6 in September in Kefalonia (high), with about 12.2h of daylight. Sunscreen and hat advised.