Greece
Kefalonia in May: weather, sea & travel advice
This month's data profile
Strong month under the current formula
Kefalonia in May is climatically well suited to city breaks, active holidays and hiking, beach holidays and family holidays. The average daily high is around 21 °C, and the sea is about 19 °C. With about 5 rainy days it is dry.
Historical monthly averages, not a weather forecast. Individual days and years can differ substantially.
Rank among 12 monthly averages
79/100 · #6
Warmth
#6
Dryness
#4
Sun
#3
Sea warmth
#7
Published best categories: City break, Active
Kefalonia · MayPhoto: Tony Hisgett from Birmingham, UK · CC BY 2.0Climate facts
- Average high
- 21 °C
- Average low
- 18 °C
- Sea
- 19 °C
- Rainy days (est.)
- 5 rainy days (est.)
- Sun (est.)
- 8 h/day
- Humidity
- 76 %
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 |
|---|---|---|---|---|---|---|---|---|---|
| April | 17 | 14 | 7 | 41 | 6.9 | 76 | 3.9 | 16 | 62 |
| May (selected) | 21 | 18 | 5 | 28 | 8.4 | 76 | 3.3 | 19 | 79 |
| June | 25 | 22 | 3 | 14 | 9.5 | 73 | 3.0 | 22 | 92 |
How do the previous and next months compare?
Baseline: May (79/100)
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 | |
|---|---|---|---|---|---|---|---|---|---|
| April | -17 | -3.8 °C | -3.4 °C | +1.9 | +13.2 mm | -1.5 h | ±0 % | +0.6 m/s | -2.6 °C |
| June | +13 | +4.4 °C | +4 °C | -2.1 | -13.5 mm | +1.1 h | -3.4 % | -0.2 m/s | +3.6 °C |
All twelve months in context
Find a place to stay
Where to stay in Kefalonia
Compare available stays, prices and cancellation terms for Kefalonia on Booking.com.
Booking.comFind places to stayAffiliate link: there is no extra cost to you.
Useful next decisions
Frequently asked questions
How warm is Kefalonia in May?
The average daily high is around 21 °C, with an average daily low of about 18 °C.
Can you swim in Kefalonia in May?
The sea is about 19 °C (refreshing).
Does it rain a lot in Kefalonia in May?
The curated estimate is about 5 rainy days per month, not a directly measured long-term average. Total precipitation averages around 28 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. May is not among them.