Weather in Marmaris in August

How August compares

August is the 2nd warmest month of the year in Marmaris and ranks 11th of 134 destinations we compare for August - see where else is hot in August. Within Turkey it is 5th of 18 (Turkey in August). Against London's average high of 21.4°C in August, Marmaris is 12.0°C warmer by day and 11.3°C warmer at night.

Daytime and night-time in August

The typical August day in Marmaris peaks at 33.4°C, but that is an average: the warmest 10% of days reach 36.6°C or more. About 100% of days top 25°C and almost every pass 30°C. Nights average 24.8°C; one night in ten drops to 23.0°C or lower, so pack a layer for evenings. Between 1991 and 2020 the hottest August day here reached 39.9°C (2019-08-10) and the coldest night 20.3°C (1995-08-31).

Rain in August

Dry (3 rainy days or fewer): about 1 days with 1 mm or more, 2 mm in total. Year to year it varies a lot - the wettest August was 2017 with 18 mm, the driest 1991 with 0 mm. Humidity averages 58%.

Sea temperature in August

The sea averages 26.9°C - warm enough to swim (22°c+). Depending on the year it ranges from 26.0°C to 27.6°C. This is the warmest the sea gets here all year.

Sunshine and daylight

Around 12.9 hours of sunshine a day (estimated from cloud cover), 13.4 hours of daylight: the sun rises about 06:24 and sets about 19:59 local time in mid-August. Average cloud cover is 4%.

Is August a good time to visit Marmaris?

Yes - it is one of the better months: hot days, little rain and long sunny days. The best months for Marmaris on our scoring are September, June, May; months averaging 25°C or more: Jun, Jul, Aug, Sep.

Expect sustained heat, not just hot afternoons

Marmaris reaches 30°C on 93% of August days, so plan for heat as the norm rather than an occasional spell. The hottest days can reach 37°C or more, making shade, drinking water and a slower pace particularly important. Put longer walks and anything energetic earlier in the day, then leave the middle of the day for resting out of direct sun. Loose, lightweight clothing will be more useful than layers, and warm nights mean air conditioning is worth prioritising when choosing accommodation. Even after sunset, do not expect a reliably cool break from the daytime warmth. Travellers who struggle with heat may find this tiring rather than relaxing.

Warm swimming water and little need for a rain plan

The sea averages 26.9°C, making August a straightforward choice if swimming is central to your holiday. It should feel warm rather than bracing, though getting into the water does not remove the need for sun protection. With about 12.9 hours of sunshine a day, shade matters as much as access to the sea. Rain is a minor consideration: there is about 1 rainy day during the month, so waterproof clothing need not dominate your packing. Keep a flexible indoor option, but build your daily routine around managing sunshine and heat rather than dodging showers. A shaded place to sit will be useful well beyond lunchtime.