Best time to visit
Best Time to Visit Kefalonia
The largest Ionian island, with mountains, underground lakes and some of Greece's most photographed beaches.
Best time to visit: June and September for warm weather and sea; spring is green and good for hiking.
Local tip: Visit Melissani around midday, when sunlight shines straight into the cave.
Getting around: A hire car is almost essential; buses are limited outside Argostoli.
Good to know: The Ionian islands are greener and get more winter rain than the Aegean islands.
What to plan your trip around
- Myrtos Beach
A white-pebble beach between steep cliffs.
- Melissani Cave
An underground lake lit by sunlight through a collapsed roof.
- Assos
A fishing village beside a Venetian fortress.
- Mount Ainos
A national park with fir forests and hiking trails.
Kefalonia weather by month
Kefalonia weather by month
Average temperatures and rainfall Kefalonia gets in each month (2011–2020). Tap a month for the full breakdown.
| Month | High | Low | Rain | Humidity |
|---|---|---|---|---|
| January | 14°C | 11°C | 111 mm | 74% |
| February | 14°C | 12°C | 93 mm | 75% |
| March | 15°C | 13°C | 74 mm | 77% |
| April | 18°C | 15°C | 33 mm | 76% |
| May | 21°C | 18°C | 24 mm | 76% |
| June | 25°C | 22°C | 23 mm | 73% |
| July | 28°C | 25°C | 10 mm | 70% |
| August | 29°C | 26°C | 14 mm | 67% |
| September | 27°C | 24°C | 72 mm | 68% |
| October | 23°C | 20°C | 101 mm | 72% |
| November | 19°C | 17°C | 115 mm | 72% |
| December | 16°C | 13°C | 134 mm | 72% |
Kefalonia through the year
January · 14° / 11°C · 111 mm
- It's one of the greyest months, with cloud cover near 66%.
- Days and nights are close, only about 2°C apart.
April · 18° / 15°C · 33 mm
- There's little difference between day and night (around 3°C).
- Just 190 km apart, but Kefalonia runs about 2°C cooler than Kalamata this month.
July · 28° / 25°C · 10 mm
- July is Kefalonia's second warmest month.
- It's one of the drier months, with about 85% less rain than Kefalonia's average.
October · 23° / 20°C · 101 mm
- October brings mid-autumn to Kefalonia.
- There's little difference between day and night (around 3°C).
The best time to visit Kefalonia is April, May and June, when average highs are 18–25°C and rainfall is around 27 mm a month.
At a glance
When to go to Kefalonia, season by season
December – February
Rainy15° / 12°C · 113 mm
The wettest part of the year. Showers are likely, so pack a rain jacket and keep plans flexible.
March – May
Best time18° / 15°C · 44 mm
Pleasant temperatures and relatively little rain: the best window for sightseeing and time outdoors.
June – August
Good28° / 24°C · 16 mm
Comfortable weather overall, with fewer visitors than peak season.
Frequently asked questions
- When is the best time to visit Kefalonia?
- For pleasant, fairly dry weather, go to Kefalonia in April, May and June. Average highs are then 18–25°C.
- Why is April a good time to visit Kefalonia?
- In April, Kefalonia averages 18°C by day and 15°C at night, with about 33 mm of rain and 51% cloud cover: warm enough to be outdoors without the peak heat or the wettest weather.
- What is the warmest month in Kefalonia?
- August is the warmest month in Kefalonia, with average highs of 29°C and lows of 26°C.
- What is the coldest month in Kefalonia?
- January is the coldest month in Kefalonia: average highs of 14°C, dropping to 11°C at night.
- When does it rain the most in Kefalonia?
- December is the wettest month in Kefalonia with about 134 mm of rain. The driest is July, with around 10 mm.
- When is the worst time to visit Kefalonia?
- January is the least pleasant month in Kefalonia, with average highs of just 14°C. It's still fine for museums and fewer crowds.
- Is the shoulder season a good time to visit Kefalonia?
- Yes. March sits just outside the best months for Kefalonia, with average highs of 15°C and about 74 mm of rain a month. Weather-wise, it is a good alternative to the peak months.
- How can I check the weather in Kefalonia before I travel?
- Compare the live forecast for Kefalonia from three independent weather services on WeatherCompare. When they agree, the forecast is more reliable.
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Best time to visit Kefalonia. WeatherCompare, 2026 (climate averages: NASA POWER / ERA5, 2011–2020). https://weathercompare.eu/guides/best-time-to-visit/greece/kefalonia
<a href="https://weathercompare.eu/guides/best-time-to-visit/greece/kefalonia">Best time to visit Kefalonia</a> (WeatherCompare)
<iframe src="https://weathercompare.eu/embed/greece/kefalonia" width="300" height="160" style="border:0;border-radius:12px" loading="lazy" title="Best time to visit Kefalonia"></iframe> <p style="font-size:12px"><a href="https://weathercompare.eu/guides/best-time-to-visit/greece/kefalonia">Best time to visit Kefalonia</a> – WeatherCompare</p>