Armutlu is the district of Yalova that faces the Sea of Marmara, and it has a mild Marmara climate. The figures below come from the Turkish State Meteorological Service: the Yalova station, the nearest official station, for the 1931-2025 measurement period, and the official Sea of Marmara series for 1970-2025. The short answer: summer is the warmest and driest season, winter the wettest, spring and autumn mild and quiet, and Armutlu is a year-round destination.
Temperature, sea water and rainfall by month
- January
- Mean temperature (°C)
- 6.6
- Mean daily maximum (°C)
- 10.1
- Sea water (°C)
- 9.3
- Monthly rainfall (mm)
- 92.5
- February
- Mean temperature (°C)
- 7.0
- Mean daily maximum (°C)
- 10.7
- Sea water (°C)
- 8.2
- Monthly rainfall (mm)
- 71.9
- March
- Mean temperature (°C)
- 8.5
- Mean daily maximum (°C)
- 12.7
- Sea water (°C)
- 8.7
- Monthly rainfall (mm)
- 72.4
- April
- Mean temperature (°C)
- 12.3
- Mean daily maximum (°C)
- 16.9
- Sea water (°C)
- 11.3
- Monthly rainfall (mm)
- 51.3
- May
- Mean temperature (°C)
- 16.8
- Mean daily maximum (°C)
- 21.4
- Sea water (°C)
- 15.4
- Monthly rainfall (mm)
- 38.8
- June
- Mean temperature (°C)
- 21.2
- Mean daily maximum (°C)
- 26.0
- Sea water (°C)
- 20.2
- Monthly rainfall (mm)
- 41.1
- July
- Mean temperature (°C)
- 23.5
- Mean daily maximum (°C)
- 28.5
- Sea water (°C)
- 23.4
- Monthly rainfall (mm)
- 24.8
- August
- Mean temperature (°C)
- 23.6
- Mean daily maximum (°C)
- 28.6
- Sea water (°C)
- 24.2
- Monthly rainfall (mm)
- 30.6
- September
- Mean temperature (°C)
- 20.2
- Mean daily maximum (°C)
- 25.1
- Sea water (°C)
- 22.3
- Monthly rainfall (mm)
- 53.4
- October
- Mean temperature (°C)
- 16.1
- Mean daily maximum (°C)
- 20.7
- Sea water (°C)
- 18.8
- Monthly rainfall (mm)
- 82.4
- November
- Mean temperature (°C)
- 12.2
- Mean daily maximum (°C)
- 16.4
- Sea water (°C)
- 15.2
- Monthly rainfall (mm)
- 81.1
- December
- Mean temperature (°C)
- 8.8
- Mean daily maximum (°C)
- 12.3
- Sea water (°C)
- 12.0
- Monthly rainfall (mm)
- 112.9
Air temperature and rainfall: Turkish State Meteorological Service, Yalova station, measurement period 1931-2025. Sea water temperature: the same service's official Sea of Marmara statistics, monthly means for 1970-2025. These sea values are averages for the whole Sea of Marmara, not a measurement taken on the Armutlu shore. The annual mean for the Sea of Marmara is given as 15.8 °C for 1970-2025 and 17.2 °C for 2014-2025.
Sunshine and rainy days
- January
- Mean daily sunshine (hours)
- 2.2
- Mean number of rainy days
- 15.3
- February
- Mean daily sunshine (hours)
- 3.2
- Mean number of rainy days
- 12.9
- March
- Mean daily sunshine (hours)
- 4.3
- Mean number of rainy days
- 12.4
- April
- Mean daily sunshine (hours)
- 5.8
- Mean number of rainy days
- 10.6
- May
- Mean daily sunshine (hours)
- 7.7
- Mean number of rainy days
- 8.0
- June
- Mean daily sunshine (hours)
- 9.0
- Mean number of rainy days
- 5.8
- July
- Mean daily sunshine (hours)
- 9.6
- Mean number of rainy days
- 3.8
- August
- Mean daily sunshine (hours)
- 8.9
- Mean number of rainy days
- 3.8
- September
- Mean daily sunshine (hours)
- 7.3
- Mean number of rainy days
- 6.0
- October
- Mean daily sunshine (hours)
- 4.9
- Mean number of rainy days
- 9.8
- November
- Mean daily sunshine (hours)
- 2.9
- Mean number of rainy days
- 11.4
- December
- Mean daily sunshine (hours)
- 1.8
- Mean number of rainy days
- 14.5
Source: Turkish State Meteorological Service, Yalova station, 1931-2025.
Armutlu season by season
With winter averages well above freezing, Armutlu can be visited in any season. Summer means the sea and the outdoors; winter is rainy and cool rather than harsh. Extremes do occur, of course: the figures above are long-term averages.
For the geography and the coves, see Armutlu Guide. For things to do through the year, see Activities.
- Spring (March to May)
- What it is like
- The mean temperature rises from 8.5 °C to 16.8 °C, rainy days fall from 12.4 to 8.0 a month, and daily sunshine climbs from 4.3 to 7.7 hours.
- Who it suits
- Walking, the coast and the villages; anyone who prefers a quiet holiday.
- Summer (June to August)
- What it is like
- The warmest and driest part of the year: mean daily maxima of 26.0 to 28.6 °C, 24.8 mm of rain in July, and a sea average of 24.2 °C in August.
- Who it suits
- The swimming season and longer family holidays.
- Autumn (September to November)
- What it is like
- September still feels like an extension of summer (20.2 °C air, 22.3 °C sea); rainfall builds from October.
- Who it suits
- A calm extension of the sea season; walking and photography.
- Winter (December to February)
- What it is like
- The wettest months: 112.9 mm in December, 92.5 mm in January. Mean temperatures stay between 6.6 and 8.8 °C, and even mean daily minima do not fall below 3.4 °C.
- Who it suits
- Short, quiet thermal-focused breaks; the district stays open in winter.
Tor Thermal and year-round use
With a title-deed timeshare you use the same period every year, so the choice of period is a climate decision. Summer periods suit the swimming season, spring and autumn periods a quieter holiday, and winter periods short, calm breaks. The dates each period covers are set out in writing before purchase: Listing.
The thermal pools and the other wellness services are planned services; the current status is on the Longevity and Wellness page.
Legal notice
Legal notice: The climate data on this page are long-term averages published by the Turkish State Meteorological Service and are not a forecast. For the current weather, see mgm.gov.tr.
Frequently asked questions
What is the weather like in Armutlu?
A mild Marmara climate. At the Yalova station of the Turkish State Meteorological Service the warmest month is August (mean 23.6 °C), the coldest is January (mean 6.6 °C) and the wettest is December (112.9 mm).
When is the best time to visit Armutlu?
June to September for the sea; April to May and September to October for walking and a quieter stay. Winter is wet but mild, and the district stays open.
When is the Sea of Marmara warm enough to swim?
On the 1970-2025 official averages the sea is 23.4 °C in July, 24.2 °C in August and 22.3 °C in September. These are averages for the whole Sea of Marmara.
Is the winter cold in Armutlu?
Not by the long-term averages. The January mean is 6.6 °C and the mean daily minimum is 3.4 °C. Rainfall, not cold, is what defines winter there.
How many rainy days are there?
The mean number of rainy days is 3.8 in July and August, and between 14.5 and 15.3 in December and January.
Can Armutlu be visited all year round?
Yes. Winter averages stay mild and travel connections run through the year; the swimming season and the quiet thermal months simply offer different experiences.
Sources
The information on this page is based on the public bodies and sources below.
Related pages
Last checked: 20 September 2026