Greece
Kefalonia in October: weather, sea & travel advice
This month's data profile
Strong month under the current formula
Kefalonia in October is climatically well suited to city breaks, family holidays, active holidays and hiking and beach holidays. The average daily high is around 22 °C, and the sea is about 23 °C. With about 10 rainy days it is moderate.
Historical monthly averages, not a weather forecast. Individual days and years can differ substantially.
Rank among 12 monthly averages
80/100 · #5
Warmth
#5
Dryness
#7
Sun
#8
Sea warmth
#4
Published best categories: City break, Active
Kefalonia · OctoberPhoto: Tony Hisgett from Birmingham, UK · CC BY 2.0Climate facts
- Average high
- 22 °C
- Average low
- 20 °C
- Sea
- 23 °C
- Rainy days (est.)
- 10 rainy days (est.)
- Sun (est.)
- 5 h/day
- Humidity
- 72 %
Climate evidence with direct month comparison
The highlighted row is the selected month. Precipitation total and rainy days are separate monthly averages.
| Month | Avg high °C | Avg low °C | Rainy days (est.) | Precipitation mm | Sun h/day (est.) | Humidity % | Wind m/s | Sea °C | Score |
|---|---|---|---|---|---|---|---|---|---|
| September | 26 | 23 | 8 | 63 | 6.4 | 69 | 3.6 | 25 | 89 |
| October (selected) | 22 | 20 | 10 | 91 | 4.5 | 72 | 4.0 | 23 | 80 |
| November | 19 | 17 | 13 | 136 | 2.9 | 74 | 4.8 | 20 | 59 |
How do the previous and next months compare?
Baseline: October (80/100)
Positive and negative values show the change from the selected month.
| Score Δ | Average high Δ | Average low Δ | Rainy days Δ | Rain Δ | Sun Δ | Humidity Δ | Wind Δ | Sea Δ | |
|---|---|---|---|---|---|---|---|---|---|
| September | +9 | +3.4 °C | +3.2 °C | -2 | -28.7 mm | +1.9 h | -3.3 % | -0.4 m/s | +2.2 °C |
| November | -21 | -3.6 °C | -3.3 °C | +3.5 | +44.8 mm | -1.6 h | +1.8 % | +0.8 m/s | -2.4 °C |
All twelve months in context

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Where to stay in Kefalonia
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Frequently asked questions
How warm is Kefalonia in October?
The average daily high is around 22 °C, with an average daily low of about 20 °C.
Can you swim in Kefalonia in October?
The sea is about 23 °C (swimmable).
Does it rain a lot in Kefalonia in October?
The curated estimate is about 10 rainy days per month, not a directly measured long-term average. Total precipitation averages around 91 mm for the month. A rainy day does not mean all-day rain.
When is the best time to visit Kefalonia?
By the climate score, June, July, August and September are the strongest months for Kefalonia. For a beach trip: June, July, August and September. October is not among them.