Weather in Kefalonia - 14-day forecast

Detailed weather forecast for Kefalonia, Greece: daytime and night temperature, rain, sunrise and sunset - today and for the next two weeks.

Forecast for the next days in Kefalonia

today☀️ 27°💧 0.2 mm

Thu☀️ 27°💧 0.2 mm

Fri☀️ 27°💧 0.2 mm

Sat☀️ 27°night 23°

Sun☀️ 27°night 24°

Mon☀️ 29°night 25°

Tue☀️ 28°💧 0.6 mm

Wed☀️ 27°💧 0.3 mm

⚠️ Weather warnings - Kefalonia

✅ No active weather warnings for Kefalonia (region: IONION ISLANDS). The national weather service is not forecasting dangerous conditions.

14-day forecast - Kefalonia

📅 Kefalonia 30 & 45-day weather - long-range outlook

Next 16 days · forecast

27°

around 23° at night · days with rain: 0

Weeks 3-4 · avg for July

31°

around 22° at night · rain chance 9%

Weeks 5-7 · avg for August

31°

around 22° at night · rain chance 14%

The 30 & 45-day outlook for Kefalonia: the next 16 days are a numerical forecast updated daily - on average 27° by day and 23° at night. Further out we rely on multi-year climate averages: around 31° in July, and about 31° in August. Forecasts beyond two weeks are indicative only.

Day-by-day forecast for Kefalonia

Wednesday8 July 2026

☀️27°clear sky

sunrise 06:22 · sunset 21:03 · night 22° · evening 26° · rain 0.15 mm · humidity 51% · wind 6 m/s · clouds 1%

Thursday9 July 2026

☀️27°clear sky

sunrise 06:22 · sunset 21:03 · night 22° · evening 26° · rain 0.15 mm · humidity 53% · wind 7 m/s · clouds 4%

Friday10 July 2026

☀️27°clear sky

sunrise 06:23 · sunset 21:03 · night 22° · evening 26° · rain 0.21 mm · humidity 52% · wind 4 m/s · clouds 14%

Saturday11 July 2026

☀️27°clear sky

sunrise 06:24 · sunset 21:02 · night 23° · evening 27° · humidity 54% · wind 6 m/s · clouds 1%

Sunday12 July 2026

☀️27°clear sky

sunrise 06:24 · sunset 21:02 · night 24° · evening 27° · humidity 47% · wind 6 m/s

Monday13 July 2026

☀️29°clear sky

sunrise 06:25 · sunset 21:02 · night 25° · evening 27° · humidity 50% · wind 5 m/s · clouds 1%

Tuesday14 July 2026

☀️28°clear sky

sunrise 06:26 · sunset 21:01 · night 24° · evening 27° · rain 0.6 mm · humidity 47% · wind 5 m/s · clouds 2%

Wednesday15 July 2026

☀️27°clear sky

sunrise 06:26 · sunset 21:01 · night 23° · evening 27° · rain 0.27 mm · humidity 57% · wind 6 m/s · clouds 1%

Thursday16 July 2026

☀️26°clear sky

sunrise 06:27 · sunset 21:00 · night 22° · evening 25° · humidity 53% · wind 7 m/s

Friday17 July 2026

☀️27°clear sky

sunrise 06:28 · sunset 21:00 · night 23° · evening 28° · humidity 52% · wind 3 m/s

Saturday18 July 2026

☀️28°clear sky

sunrise 06:28 · sunset 20:59 · night 24° · evening 28° · humidity 58% · wind 4 m/s

Sunday19 July 2026

☀️25°clear sky

sunrise 06:29 · sunset 20:58 · night 22° · evening 25° · humidity 66% · wind 8 m/s · clouds 1%

Monday20 July 2026

☀️28°clear sky

sunrise 06:30 · sunset 20:58 · night 24° · evening 27° · humidity 53% · wind 5 m/s

Tuesday21 July 2026

☀️28°clear sky

sunrise 06:31 · sunset 20:57 · night 24° · evening 27° · humidity 52% · wind 6 m/s · clouds 3%

Wednesday22 July 2026

☀️29°clear sky

sunrise 06:32 · sunset 20:56 · night 24° · evening 29° · humidity 46% · wind 6 m/s

Thursday23 July 2026

☀️29°clear sky

sunrise 06:32 · sunset 20:56 · night 25° · evening 29° · humidity 48% · wind 6 m/s

☀️ UV index in Kefalonia - is it safe to sunbathe?

Today the UV index in Kefalonia is 8 (very high) - unprotected fair skin can burn in about 25 minutes. SPF 50, long sleeves and shade between 10:00 and 16:00.

🌿 Pollen in Kefalonia - info for allergy sufferers

Today grasses pollen is highest in Kefalonia - about 4 grains/m³, low level. Most allergy sufferers should not feel strong symptoms. Pollen levels are a CAMS model forecast and are indicative.

🌊 Sea temperature - Kefalonia

Water today

27°C

Week avg

27°C

Waves today

0.2 m

How's the water?

warm

16-day sea temperature forecast:

8.07 27°C9.07 26°C10.07 27°C11.07 27°C12.07 27°C13.07 26°C14.07 27°C15.07 27°C16.07 27°C

Average sea temperature through the year:

Jan 17°CFeb 17°CMar 17°CApr 17°CMay 20°CJun 24°CJul 27°CAug 27°CSep 26°COct 23°CNov 22°CDec 19°C

Sea-surface temperature from marine models, updated daily. See also: where the sea is warmest right now.

Air quality and smog in Kefalonia

City	PM2.5 (µg/m³)	PM10 (µg/m³)	Air quality
Ateny	15.2	23.5	good
Larissa	13	19.5	very good
Patras	9.1	13.8	very good

Based on PM2.5 thresholds. Station readings, updated daily (last reading: 2026-07-08, 04:00).

Kefalonia weather through the year

🎉 Public holidays in Kefalonia - when are the long weekends?

Next long weekend in Kefalonia: Christmas Day (25 December, Friday) - Friday–Sunday (3 days off).

15 AugustSaturday

Assumption Day

falls on a weekend

28 OctoberWednesday

Ochi Day

25 DecemberFriday

Christmas Day

🎈 long weekend

26 DecemberSaturday

St. Stephen's Day

falls on a weekend

1 JanuaryFriday 2027

New Year's Day

🎈 long weekend

6 JanuaryWednesday 2027

Epiphany

15 MarchMonday 2027

Clean Monday

🎈 long weekend

25 MarchThursday 2027

Annunciation

🎈 long weekend + bridge day

30 AprilFriday 2027

Good Friday

🎈 long weekend

1 MaySaturday 2027

Labour Day

falls on a weekend

2 MaySunday 2027

Easter Sunday

falls on a weekend

3 MayMonday 2027

Easter Monday

🎈 long weekend

Public holidays (statutory days off) - shops, offices and some attractions may be closed. A "bridge day" is a workday between a holiday and the weekend worth taking as leave.

Nearby places

Gjirokaster

FAQ - Kefalonia weather

What is the weather like in Kefalonia today?

Today it is about 27° during the day and 22° at night, clear sky.

How far ahead can I check the forecast for Kefalonia?

This page shows a detailed 14-day forecast plus the long-term monthly climate, so you can plan both a short trip and a holiday months ahead.