SeasonMapKefalonia weather by month
Greece
The best time to visit Kefalonia is June to August — 93/100 in July, 32°C and 1 rainy day. The best season is summer, June to August (92/100 on average).
The worst month is January at 54/100 — cool, rainy, clean air. See January →
Updated September 2026 · climate normals from ERA5 reanalysis
Planning the wider trip? Best time to visit Greece →
Kefalonia, month by month
Comfort score out of 100 for the kind of trip Kefalonia is best for, the average high, rainy days and hours of sun a day from the climate normals, and how busy it tends to be.
| Month | Score | Tier | High | Rain | Sun | Crowds | On |
|---|---|---|---|---|---|---|---|
| JanJanuary | 54 | D | 15°C | 14 d | 8 h | Busy | 1 |
| FebFebruary | 65 | C | 16°C | 9 d | 9 h | Shoulder | 1 |
| MarMarch | 72 | B | 18°C | 11 d | 10 h | Shoulder | 1 |
| AprApril | 78 | B | 21°C | 5 d | 11 h | Peak | 2 |
| MayMay | 83 | A | 24°C | 4 d | 12 h | Shoulder | 2 |
| JunJune | 92 | S | 29°C | 2 d | 13 h | Busy | 3 |
| JulJuly | 93 | S | 32°C | 1 d | 13 h | Busy | 3 |
| AugAugust | 91 | S | 32°C | 2 d | 13 h | Peak | 6 |
| SepSeptember | 87 | A | 29°C | 5 d | 11 h | Busy | 4 |
| OctOctober | 79 | B | 25°C | 8 d | 9 h | Shoulder | 2 |
| NovNovember | 61 | C | 21°C | 14 d | 8 h | Quiet | 1 |
| DecDecember | 56 | D | 17°C | 13 d | 7 h | Busy | 1 |
What's on in Kefalonia through the year
Festivals, natural spectacles, holidays and the seasons to watch out for — curated and sourced. The month pages carry the detail.
- April
- Orthodox Easter10–13 AprHoliday
- May
- Loggerhead turtles1 May – 15 Sep (usually)Nature
- June
- Wildfire season15 Jun – 30 SepHazard
- Sea warm enough to swim1 Jun – 15 Oct (usually)Season
- August
- Snakes of the Virgin, Markopoulo6–16 AugFestival
- Robola harvest20 Aug – 30 Sep (usually)Nature
- August peak1–31 AugHoliday
- October
- Out of season20 Oct – 15 AprSeason
Crowds in Kefalonia in July
How busy the place itself is — school and mass holidays, the months an editor tagged, and how sought-after the weather makes them. Never part of the comfort score.
BusySummer holidays in Greece, school holidays in 7 of the markets that fill it(estimated)
Peak crowdsBusyShoulder seasonQuiet