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Kefalonia, Greece · Temperate oceanic

Kefalonia: best months to visit

June (9.1/10) · January (4.1/10).

📅 Updated August 2026 🛰️ ERA5 · 10 years 📍 38.18°N · 20.49°E
⚡ Quick answer
June
Depends on your goals
9.1/10
☀️ Jun
Top score (9.1/10)
🌤️ Sep
Alt. (8.5/10)
Jan
Plus rude (4.1/10)
🌊 Seaside☀️ Bright🍴 Gastronomy
Photo par Feri & Tasos via Unsplash
Decide

When to visit Kefalonia?

The decision rests on several criteria. Climate score, tourist crowds and feasible activities.

Verdict: In Kefalonia, June and September clearly stand out. January concentrates the least favourable conditions.
G
Gilles's view
Founder · BestDateWeather

Kefalonia (Cephalonia), the largest Greek Ionian island: 35,000 inhabitants over 780 km² south of Corfu. Made famous by the Louis de Bernières novel Captain Corelli's Mandolin (1994) then the 2001 film with Nicolas Cage. Rebuilt after the devastating 1953 earthquake (95% of the island destroyed, one of the worst earthquakes of the 20th century in Europe). June is my favourite month (9.5/10): 21-27°C, 11% rain, sea at 22°C. July-August drop to 6.9/10 due to the heat (23-30°C) and the crowds (Italians, British in the majority). September stays excellent (8.8/10). From November to March, expect 9-16°C and 33-48% rain: mild but rainy, many hotels close. Highlights: Myrtos Beach (the most famous in Kefalonia, one of the most photographed beaches in Greece along with Navagio, white cliffs 200m, unique turquoise water thanks to the light reflecting on the clear bottom, panoramic point from the road above), Antisamos Beach (where the film Captain Corelli's Mandolin was shot, near Sami), Melissani Cave (underground lake discovered 1951, turquoise water lit by a hole in the vault at solar noon, 30-min crossing by boat), Drogarati Cave (stalactites/stalagmites, sometimes concerts inside for its exceptional acoustics), Argostoli (capital, port, restaurants), Fiscardo (one of the only villages spared by the 1953 earthquake, preserved Venetian architecture, smart port), Assos (picturesque village on a peninsula with 16th-century Venetian fortress), Mount Ainos (national park, endemic Kefalonian fir, highest point 1628m). Excursions: Ithaca (Ulysses' return island according to Homer, 30 min by ferry from Sami), Lefkada, Zakynthos. Try kreatopita (meat pie), aliada (garlic puree), thyme honey, Robola wine (local AOC white grape, ideal with fish). Kefalonia airport (EFL).

Top & avoid
🏆 June · 9.1 September · 8.5 May · 8.2 October · 7.9 ⚠️ January · 4.1
4.1
Jan
4.4
Feb
4.4
Mar
7.6
Apr
8.2
May
9.1
Jun
6.5
Jul
6.3
Aug
8.5
Sep
7.9
Oct
4.5
Nov
4.3
Dec
Best period · ≥ 7 Decent period · 4 – 7 Tough conditions · < 4

What you grasp in 5 seconds

Kefalonia offers 5 comfortable months, without any month really to avoid. The gap stays moderate: 9.1 in June vs 4.1 in January.

What to check next

Your tolerance for crowds and budget. The best months concentrate tourist saturation and higher prices. Shoulder seasons offer a good compromise.

Next action

Scroll down to the detailed table to compare month by month, then open the page of the month that interests you.

How we calculate the score

The score combines 4 weighted criteria using 10 years of real climate data (ERA5).

Source : ERA5 · Open-Meteo · 10 years (2016–2025) · Full methodology →

Understand

Compare all 12 months

Month-by-month details: temperature, rain, sunshine, score and verdict.

5 comfortable months (Apr · May · Jun · Sep · Oct)
MonthT° minT° maxRain %mm/daySunScoreVerdict
🌥️ January 9°C14°C48%4.8mm4.8h4.1/10Decent period
🌥️ February 9°C15°C33%3.1mm5.9h4.4/10Decent period
🌥️ March 10°C16°C37%2.6mm6.3h4.4/10Decent period
☀️ April 13°C18°C22%1.3mm7.8h7.6/10Best period
☀️ May 16°C22°C22%1.3mm8.6h8.2/10Best period
☀️ June 21°C27°C11%0.6mm9.3h9.1/10Best period
⛅ July 23°C30°C3%0.3mm9.7h6.5/10Decent period
⛅ August 24°C30°C8%0.3mm8.9h6.3/10Decent period
☀️ September 21°C27°C21%2.2mm7.3h8.5/10Best period
☀️ October 17°C23°C29%3.4mm6.3h7.9/10Best period
🌥️ November 14°C19°C47%7.0mm5.1h4.5/10Decent period
🌥️ December 11°C16°C43%4.9mm4.9h4.3/10Decent period
📊 Quick read
Optimal window
Apr → Jun
Good transition
Mar · Jul · Aug · Nov
Tough period
none
🌡️ Detailed conditions (June)
🌡️ Feel
Warm
☀️ UV
8.2 · Very strong
💧 Humidity feel
19°C · Humid
☔ Rain
11% · 0.6 mm/day
🌅 Sunshine
9.3h/day
10-year trend

Annual temperatures — Kefalonia

Min/max temperature curves observed over the past 10 years (ERA5). Shows climate stability and trend.

Annual data unavailable for this destination.
Tailor

For your trip

A few angles depending on what kind of trip you are planning.

🏖️ Beaches: Jun-Sept🌊 Swell: Sept-Mar🚤 Water activities
Book

Plan your trip

Hotels at their lowest outside peak season, highest on comfortable months. Shoulder seasons offer a good price/climate compromise.

🎟️ Activities & tours · Kefalonia

GetYourGuide selection · free cancellation

See all →
Affiliate link · GetYourGuide
Practical info

What you need to know before you go

Three angles: the country (language, currency, safety, budget), the year-round climate, and the specifics of a beach holiday.

Country · Greece

🗣️LanguageGreek
💶CurrencyEuro (€)
🚗DrivingRight-hand
🛡️Safety Very safe · 1/5
💰Cost of living Moderate · 3/5

🌡️ Climate

🌍Climate typeTemperate oceanic
📈Climate trendData unavailable
🔥Hottest monthJuly · 30°C
❄️Coolest monthJanuary · 14°C
🌧️Rainiest month January · 48%

🏖️ Beach holiday

📅Peak seasonJuin → Sept
🏖️Swell (Sept–Mar) Modérée
🛂VisaSchengen · 90 days
Explore

Related destinations & guides

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Location

Where is Kefalonia ?

Global position + regional geographic context.

🌍 World
🔍 Geographic context
Temperate oceanic climate with a 9.1 → 4.1 gap between best and worst month. 10 years of ERA5 data to choose by project.
38.18°N · 20.49°E
Questions

Frequently asked questions

What is the best time to visit Kefalonia?
June is the best month with 27.0°C highs, 21.0°C lows, 9.3h of sunshine and 11.0% rainy days. The months of June & September offer comparable conditions.
How many hours of sunshine does Kefalonia get in June?
Kefalonia averages 9.3 sunshine hours per day in June. It is the sunniest month with a climate score of 8.8/10.
What is the rainiest month in Kefalonia?
January is the most unfavourable month with January has the lowest climate score of the year and the lowest climate score of the year.
What are the temperatures at night in Kefalonia in June?
In June, overnight lows reach 21.0°C, while afternoon highs average 27.0°C.
Is Kefalonia good in winter?
In winter (December-February), Kefalonia scores 4.1/10 on average — Difficult period — prefer the peak season.. The best month overall remains June with a score of 8.8/10.
When should you avoid Kefalonia?
January is the most difficult month to visit Kefalonia, with January has the lowest climate score of the year. Climate conditions are at their lowest of the year during this period.