Athens weather in December
Athens averages 14°C by day and 8°C at night in December, with the sea at 18°C and about 96 mm of rain in the month. It cools by about 2°C into January.
Day
14°C
Night
8°C
Sea
18°C
Rain
96 mm
Flight from London
3½h
What December feels like
December is cool in Athens: bring a proper jacket.
The sea is 18°C: refreshing, and chilly for most people after a few minutes.
Expect some rainy spells: about 96 mm falls in the month.
That is 5°C warmer than an average December day in London.
Of the 56 sun destinations we track, Athens is the #56 warmest in December, and #23 of 23 within 5½ hours of the UK.
Comparing places? See the warmest place in Greece in winter for every winter month, place by place.
Going to Athens in December?
Share the TikToks and Instagram Reels you've saved for Athens to Dream Trip. It finds the places, pins them on a map and builds your days around them.
Want it warmer in December?
These are hotter than Athens this month for at most an hour and a half more flying:
Athens weather by month
December is highlighted. Compare with November and January, or see the full year in Athens.
Athens in December: quick answers
Is Athens hot in December?
December is cool in Athens: bring a proper jacket. Average highs are 14°C and lows 8°C.
Can you swim in Athens in December?
The sea is 18°C: refreshing, and chilly for most people after a few minutes.
Does it rain in Athens in December?
Expect some rainy spells: about 96 mm falls in the month.
What is the warmest month in Athens?
July, at an average high of 34°C. The coolest is January at 12°C.
How long is the flight to Athens from the UK?
About 3½h direct from London, estimated from the 2,410 km distance. Check your airline for exact times.
Still choosing? See where is hot in December for every destination ranked by temperature, sea and flight time.
How we measured this
Averages of every day in December from 2016 to 2025, from the Open-Meteo historical weather archive (ECMWF ERA5 reanalysis). Sea temperature is the 2023 to 2025 average from the Open-Meteo marine archive. Rain is the average monthly total. Reanalysis describes an area about 25 km across, so sheltered resorts can run a degree or two warmer. Flight time is a distance-based estimate from London Heathrow.
Planning Athens in December?
Save the restaurants, beaches and views you find on TikTok and Instagram for Athens straight to a map, then let Dream Trip turn them into a day-by-day plan.
