SeasonMapKefalonia weather in May
Greece
May in Kefalonia: warm, dry, with muggy air — an excellent time to visit.
#5 of 12 months in Kefalonia · #578 of 1383 destinations to visit in May · comfort 83/100 (tier A)
Updated September 2026 · climate normals from ERA5 reanalysis
Traveller notes on Kefalonia in May
Other months in Kefalonia
Kefalonia's forum puts August around 30°C in the shade with roughly 12 hours of sunshine a day, capable of hitting 40°C on the hottest days especially early in the month. Regulars describe the classic siesta rhythm — sightseeing before 11:30am, shade and a long lunch through the peak heat, back out around 4pm — and note the Greek heat feels notably less oppressive than a 30°C day in a humid climate.
Add your own note from Kefalonia's card on the map.
Kefalonia climate normals — May
| Daytime high | 24°C / 75°F | 🌤 warm |
|---|---|---|
| Nighttime low | 16°C / 61°F | |
| Feels like (high) | 25°C / 77°F | |
| Sea temperature | 19°C / 66°F | 🧊 bracing |
| Rainfall | 24 mm / 0.9 in | ☀️ dry |
| Rainy days | 4 days | |
| Humidity | 80% | 💦 very humid |
| Dew point | 15°C / 60°F | |
| Sunshine | 12.2 h/day | |
| Daylight | 14.2 h | |
| Wind | 25 km/h / 15 mph | |
| Air quality (US AQI) | 55 | 🙂 moderate |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Crowds in Kefalonia in May
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.
Shoulder seasonschool holidays in 4 of the markets that fill it, an ordinary month(estimated)
Peak crowdsBusyShoulder seasonQuiet
Best months for Kefalonia's weather
Ranked by this destination's own climate comfort score across the year — a different thing from how busy it gets (see Crowds above).
Fair weatherKefalonia's weather peaks June–August, best around July.
Best weatherFair weatherToughest weather
What's on in Kefalonia in May
Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.
- Nature
Loggerhead turtles
1 May – 15 Sep · usuallyTurtle nestingLoggerheads nest on the south-coast beaches around Katelios through the summer, and adults hang around the fishing boats in Argostoli harbour waiting for scraps.
Nearby, and something's on
Within 300 km of Kefalonia — a day trip or a short hop — with something on this month. Never part of the comfort score.
Where is Kefalonia?
Kefalonia in May — FAQ
- Is May a good time to visit Kefalonia?
- May in Kefalonia: warm, dry, with muggy air — an excellent time to visit. It ranks #5 of 12 months for Kefalonia on SeasonMap's comfort score (83/100).
- What is the weather like in Kefalonia in May?
- In May, Kefalonia averages a daily high of 23.9°C and a low of 15.9°C, with about 24.1 mm of rain over roughly 4.4 rainy days.
- What is the air quality in Kefalonia in May?
- Kefalonia has a mean US Air Quality Index of about 55 in May.
Other months in Kefalonia
Compare Kefalonia in May
Warmer or cooler than Kefalonia in May
Similar destinations in Southern Europe — May
Within 300 km: Zakynthos' Loggerhead nesting in Laganas Bay on 1 May – 31 Oct, and Corfu's Island season opens around 15 Apr – 20 May.