Weather in Marmaris in December

How December compares

December is the 10th warmest month of the year in Marmaris and ranks 80th of 134 destinations we compare for December - see where else is hot in December. Within Turkey it is 5th of 18 (Turkey in December). Against London's average high of 7.7°C in December, Marmaris is 7.6°C warmer by day and 7.3°C warmer at night.

Daytime and night-time in December

The typical December day in Marmaris peaks at 15.3°C, but that is an average: the warmest 10% of days reach 18.3°C or more. Days over 25°C are rare. Nights average 10.0°C; one night in ten drops to 6.3°C or lower, so pack a layer for evenings - it is genuinely cool after dark. Between 1991 and 2020 the hottest December day here reached 21.6°C (2010-12-03) and the coldest night 2.6°C (1992-12-24).

Rain in December

Wet (more than 8 rainy days): about 12 days with 1 mm or more, 174 mm in total. Year to year it varies a lot - the wettest December was 2001 with 364 mm, the driest 2015 with 1 mm. Humidity averages 76%.

Sea temperature in December

The sea averages 19.3°C - bracing (18-22°c). Depending on the year it ranges from 18.4°C to 20.1°C. For the warmest sea here, come in August (26.9°C).

Sunshine and daylight

Around 4.8 hours of sunshine a day (estimated from cloud cover), 9.5 hours of daylight: the sun rises about 08:13 and sets about 17:52 local time in mid-December. Average cloud cover is 49%.

Is December a good time to visit Marmaris?

December is not the strongest month here: mild days and frequent rain. The best months for Marmaris on our scoring are September, June, May; months averaging 25°C or more: Jun, Jul, Aug, Sep.

Comfortable afternoons, but pack for rain and cooler nights

The daytime average is comfortable for walking with a light jacket, particularly when the sun is out. Warmer days can reach 18°C or more, but this is not a month to choose for heat. Evenings need more thought: the coldest nights fall to around 6°C or below, so bring a warm layer as well as a waterproof outer jacket. Rain is a meaningful part of the decision, not just a passing caveat. With about 12 rainy days, fixed outdoor plans could prove frustrating. Keep room to move activities around the forecast, and pack shoes you are happy wearing in wet conditions.

Some sunshine, with bracing conditions in the sea

Expect about 4.8 hours of sunshine within 9.5 hours of daylight, so there is scope for pleasant time outside, but not uninterrupted sun. Use brighter spells for walks and aim to be outdoors around the warmer part of the day rather than leaving everything until late afternoon. The sea averages 19°C, which is bracing rather than comfortably warm. A swim may appeal if you already enjoy cooler water, but it should not be the main reason to book. Bring swimwear if you like, alongside clothes that let you get warm afterwards. For travellers seeking warmth above all else, December is a compromise.