May · Greece
Best time to visit Kefalonia in May Weather, crowds & prices
Weather in Kefalonia in May
Average temperature 20°C, 40 mm of rain, about 31 days with 6+ hours of sunshine and 76% humidity — based on the five most recent complete years of ERA5 data (2021–2025).
May score
8.1/10
Ranked #5 of 12 months
- Avg temp
- 20°C
- Rainfall
- 40 mm
- Humidity
- 76%
- Days with 6h+ sun
- 31
- Crowd Density
- Moderate Crowds
- Average Expenses
- $$ · Moderate Cost ($$)
May in Kefalonia scores 8.1/10 for beach and coastal travel - an above-average month (#5 of 12). Expect around 20°C, 40 mm of rain, and roughly 31 days with 6+ hours of sunshine this month.
Lush Ionian island known for dramatic Myrtos beach cliffs, subterranean Melissani lake, and colorful villages.
May in Kefalonia — reliably good (5th best month)
May averages 20°C (67°F) — warm enough for beach and boat plans, still short of the heat that pushes sightseeing into early morning.
Expect 40 mm of rain — occasional showers rather than washed-out days — alongside about 31 days with 6+ hours of sunshine and 14.1 daylight hours.
It scores 8.1/10 here, 5th of 12 months, against 10/10 in the destination's best month.
Pack light clothing, swimwear and real sun protection.
Plan for mid-season pricing, with crowds are moderate.
Flexible dates? August scores 1.9 points higher here — enough to change the trip.
Frequently asked
- What is the weather like in Kefalonia in May?
- In May, Kefalonia averages 20°C, 40 mm of rain, and about 31 days with 6+ hours of sunshine. Its climate-comfort score is 8.1/10.
- Is May a good time to visit Kefalonia?
- May earns a 8.1/10 climate-comfort score. Use the year-round chart to weigh the weather against your budget and crowd preferences.
- How much does it rain in Kefalonia in May?
- Expect about 40 mm of rain in May. Average humidity is 76% and there are about 31 days with 6+ hours of sunshine.
Curated in Kefalonia
Tickets & experiences
Things to do in Kefalonia
Kefalonia, Greece. Live activities and tours from GetYourGuide, matched to this destination.