Which is the hottest month in Kefalonia?

The hottest time of year in Argostoli, Kefalonia is normally August. Expect maximum daytime temperatures to reach 30°C with high heat and humidity.

Best time to visit Kefalonia

Q: When is the best time to visit Kefalonia?

The best time to visit Kefalonia (Argostoli) is June based on the following average weather conditions. Maximum daytime temperature = 22 - 30°C. Daily hours of sunshine = 10 hours or more.

Q: Which month has the most rain in Kefalonia?

In terms of rainfall, December is usually the wettest month in Argostoli, Kefalonia with 187mm on average. There are normally 15 days in December with some rain.

Q: When is it sunniest in Kefalonia?

The sunniest time of year in Argostoli, Kefalonia is normally July with bright sunshine on average for 88% of daylight hours; that's 13 hours of sunshine per day.

Q: When is the sea warmest in Kefalonia?

The sea is usually at its warmest in Argostoli, Kefalonia in August when the water temperature reaches 26°C.

Find the best time to visit Kefalonia and plan your perfect trip in 2025/2026. Get holiday inspiration, weather guides, travel advice and find great deals.

Kefalonia by month

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

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Destination

Top Kefalonia destinations

Below are the temperatures expected today at popular countries, regions and places in Kefalonia. Select a destination to compare today's forecast with average weather conditions.

All Kefalonia destinations

When is the best time to visit Kefalonia?

The best time to visit Kefalonia (Argostoli) is June based on the following average weather conditions.

Maximum daytime temperature = 22 - 30°C [remove]
Daily hours of sunshine = 10 hours or more [remove]

Change the criteria to reflect your weather preferences.

1
Jan
1
Feb
1.5
Mar
2.5
Apr
4.5
May
5
Jun
4
Jul
4
Aug
4.5
Sep
4
Oct
1.5
Nov
0.5
Dec

Change criteria

Max Day Temperature (°C)

13
Jan
13
Feb
15
Mar
18
Apr
23
May
27
Jun
30
Jul
30
Aug
27
Sep
22
Oct
18
Nov
15
Dec

Hours of Sunshine (daily)

5
Jan
5
Feb
6
Mar
7
Apr
9
May
11
Jun
13
Jul
12
Aug
9
Sep
7
Oct
5
Nov
4
Dec

Best time to visit

Destination

Daytime temperature

Sunshine hours

Sea temperature

Monthly rainfall

Days with some rain

Heat & humidity

The weather guide for Kefalonia (Argostoli) shows long term weather averages processed from data supplied by CRU (University of East Anglia) & today's weather forecast provided by meteoblue. Find out more about our data sources.

Metric (°C / mm) | Imperial (°F / inches)

More about Kefalonia

Explore our complete guide to Kefalonia with the latest travel advice for travellers and holidaymakers including official updates and local travel tips for Kefalonia.

Essential travel guide
Travel guidance
Travel health
Travel features
Top travel deals
FAQs

Kefalonia travel guide - essential info

Below is a beginner's guide to Kefalonia with essential travel facts such as dominant language spoken, typical flight time from the UK and the local currency. You can also check whether visas are required and what plug adapter you need to pack.

Kefalonia - quick facts
Flight time^✝	3.5 hours
Time difference	UK +2 hours
Language(s)	Greek
Currency	Euro
Electricity	C + F plug (230V)
Driving side	Right

Why visit Kefalonia?

Considering a holiday to the Kefalonia? Here are some of the very good reasons it makes such a wonderful holiday destination be it for beaches or nature to ensure you get the most out of your 2025/2026 escape.

Beaches
Nature

Kefalonia tourist information

Visit Kefalonia

✝ = Typical flight time from the UK.

Travelling to Kefalonia?
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Kefalonia travel guidance

Check the latest travel guidance and advice on visiting Kefalonia from official government sources (in english) from around the world including entry requirements and travel restrictions.

UK traveller advice for Kefalonia - UK FCDO
Irish traveller advice for Kefalonia - Department of Foreign Affairs, Ireland
Safe travel advisories for Kefalonia - Ministry of Foreign Affairs, New Zealand
Smarter traveller advice for Kefalonia - Department of Foreign Affairs, Australia

Learn more about the current safety and security risks from terrorism, natural disasters and more. Read about the local laws and customs to consider when travelling around Kefalonia.

Note: UK FCDO - UK Foreign, Commonwealth & Development Office

Kefalonia travel health

Find out more about staying safe when travelling to Kefalonia with the latest guidance on required vaccinations and recommended medication to take with you.

Vaccines & medicines for Kefalonia - CDC
Health & vaccinations for Kefalonia - TravelHealthPro, NaTHNac
How to stay safe & healthy in Kefalonia - Fit for Travel, Public Health Scotland

Check out the general travel tips for staying safe and healthy in Kefalonia, risks of preventable diseases and what to pack.

Note: CDC - Centers for Disease Control and Prevention

Kefalonia travel features

Do you want to learn more about Kefalonia? Read our latest features covering travel tips and insider destination guides on where to go and what to do in Kefalonia.

Kefalonia FAQs

Read our frequently asked questions about travelling to Kefalonia including the current entry restrictions, driving side, electrical plugs used and much more.

Which month has the most rain in Kefalonia?

In terms of rainfall, January is usually the wettest month in Argostoli, Kefalonia with 0mm on average. There are normally no days in January with some rain.

When is it sunniest in Kefalonia?

The sunniest time of year in Argostoli, Kefalonia is normally January with bright sunshine on average for 0% of daylight hours; that's 0 hours of sunshine per day.

When is the sea warmest in Kefalonia?

The sea is usually at its warmest in Argostoli, Kefalonia in January when the water temperature reaches 0°C.

What is the flight time to Kefalonia from the UK?

The flight time to Kefalonia from the UK is typically 3.5 hours.

What is the time difference between Kefalonia and the UK?

The time difference between Kefalonia and the UK is UK time+2 hours.

What is the main language spoken in Kefalonia?

The main language spoken in Kefalonia is Greek.

Learn a language for Kefalonia with Rosetta Stone^*.

What is the currency in Kefalonia?

The currency in Kefalonia is the Euro (EUR).

Send money to Kefalonia with TransferGo^* and XE Money Transfers^*.

Which plugs are used in Kefalonia?

Kefalonia uses electrical plug type C + F (230 Volts).

Which side of the road do they drive on in Kefalonia?

They drive on the right side of the road in Kefalonia.

Find out more about driving in Greece with RAC^*, International Drivers Association^* and Halfords^*.

Kefalonia travel deals

Holidays to Kefalonia

Check out the latest deals, discount codes and special offers on holidays to Kefalonia in 2025/2026. Pay low deposits and save with last minute holiday availability and free kids places.