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Weather & Climate in Gemlik, Turkey
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Gemlik enjoys a temperate climate with an average annual temperature of 57°F (14°C). Winters average 41°F in January while summers reach 74°F in July. The area gets 292 sunny days per year, well above the U.S. average of 205 / making it one of the sunnier locations in the country. Annual precipitation totals 24.3 inches (drier than the 38-inch national average). The city sits at an elevation of 16 feet.
Temperature
41°F Jan (5°C)
74°F Jul (23°C)
| Annual Average | 56.7°F |
| 5% above US avg | |
| January Average | 41°F (5°C) |
| July Average | 74°F (23°C) |
| Sunny Days | 292 days/yr |
Geography
| Elevation | 16 ft (5 m) |
| Area | 145.2 sq mi (376.0 km²) |
| Population Density | 490/sq mi |
| Coordinates | 40.4309°N, 29.1597°W |
| Timezone | Europe/Istanbul |
Precipitation & Snow
Air Quality
Earthquake History
4,699 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M7.6.
| Aug 17, 1999 | 4 km ESE of Derince, Turkey | M7.6 | 69 km | 17 km |
| Apr 23, 2025 | 24 km SE of Marmara Ereğlisi, Turkey | M6.2 | 93 km | 13 km |
| Sep 13, 1999 | 4 km SE of Köseköy, Turkey | M5.9 | 81 km | 13 km |
| May 19, 2011 | 12 km ENE of Simav, Turkey | M5.8 | 143 km | 7 km |
| Sep 26, 2019 | 17 km ESE of Marmara Ere?lisi, Turkey | M5.7 | 100 km | 8 km |
| Nov 11, 1999 | 5 km N of Sapanca, Turkey | M5.7 | 100 km | 22 km |
| Aug 23, 2000 | 8 km E of Akyaz?, Turkey | M5.3 | 135 km | 15 km |
| Sep 29, 1999 | 8 km NNW of Ta?köprü, Turkey | M5.2 | 38 km | 10 km |
| Feb 17, 2009 | 5 km ENE of Simav, Turkey | M5.2 | 148 km | 7 km |
| May 3, 2012 | 13 km NE of Simav, Turkey | M5.2 | 140 km | 3 km |
| Aug 31, 1999 | 2 km NNE of Kar??yaka, Turkey | M5.2 | 74 km | 10 km |
| Aug 19, 1999 | 3 km SSE of Ç?narc?k, Turkey | M5.2 | 21 km | 10 km |
| Aug 17, 1999 | 9 km SE of Akyaz?, Turkey | M5.1 | 131 km | 10 km |
| Jul 25, 2011 | 25 km SW of Marmara Ere?lisi, Turkey | M5.1 | 126 km | 16 km |
| Aug 17, 1999 | 2 km NW of Kullar, Turkey | M5.0 | 77 km | 10 km |
| Sep 9, 1999 | 7 km NNW of Koruköy, Turkey | M5.0 | 32 km | 13 km |
| Apr 23, 2025 | 14 km S of Kumburgaz, Turkey | M5.0 | 77 km | 10 km |
| Nov 7, 1999 | 8 km E of Akyaz?, Turkey | M5.0 | 135 km | 10 km |
| Aug 17, 1999 | 9 km ESE of Köseköy, Turkey | M4.9 | 87 km | 10 km |
| Sep 24, 2019 | 20 km SE of Marmara Ere?lisi, Turkey | M4.9 | 98 km | 10 km |
Source: USGS Earthquake Catalog (M2.5+, 1990-2025). Sorted by magnitude.
Tsunami History
12 tsunamis recorded within 500 km. Highest wave on record: 6.0 m (20 ft).
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 1509 | MARMARA SEA | Earthquake | 6.0 m | 5,000 | 98 km |
| 1894 | MARMARA SEA | Earthquake | 4.5 m | 1,349 | 43 km |
| 1999 | KOCAELI, TURKEY | Earthquake | 2.5 m | 17,118 | 78 km |
| 1963 | MARMARA SEA | Earthquake | 1.0 m | 1 | 30 km |
| 2025 | MARMARA SEA | Earthquake | 0.1 m | - | 97 km |
| 1935 | MARMARA SEA | Eruption + Earthquake | - | 5 | 146 km |
| 1343 | MARMARA SEA, STRAIT OF BOSPORUS | Earthquake | - | - | 83 km |
| 986 | MARMARA SEA | Earthquake | - | - | 41 km |
| 557 | MARMARA SEA | Earthquake | - | - | 142 km |
| 551 | LEVANTIAN SEA | Earthquake | - | - | 75 km |
| 543 | BLACK SEA | Earthquake | - | - | 116 km |
| 478 | MARMARA SEA | Earthquake | - | - | 41 km |
Source: NOAA/NCEI Historical Tsunami Database.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 41°F (5°C) | 3.3 in | Coldest |
| February | 42°F (5°C) | 2.5 in | |
| March | 45°F (7°C) | 2.3 in | |
| April | 54°F (12°C) | 1.9 in | |
| May | 62°F (16°C) | 1.5 in | |
| June | 70°F (21°C) | 1.1 in | |
| July | 74°F (23°C) | 0.8 in | Warmest |
| August | 73°F (23°C) | 0.8 in | Driest |
| September | 67°F (19°C) | 1.4 in | |
| October | 59°F (15°C) | 2.3 in | |
| November | 51°F (10°C) | 2.9 in | |
| December | 45°F (7°C) | 3.5 in | Wettest |
Gemlik has a seasonal temperature swing of 33°F / from 41°F in January to 74°F in July. Total annual precipitation is 24.3 inches, with December being the wettest month (3.5") and August the driest (0.8").