Kocaeli weather
Today's sky, the hour-by-hour rain chance and the 16-day forecast for Kocaeli, Turkey. Like most weather services, we show Kocaeli at one spot: Gebze, its largest city. Best months for weather: May–Oct.
Best Time to Visit
Peak season May–OctOff season Dec–Feb
Kocaeli weather by month
When is the best time to visit Kocaeli?
Based on weather alone, the best time to visit Kocaeli is May–Oct, according to NASA's 2001–2025 climate averages. Dec–Feb tends to be the least pleasant. Average highs run from 8°C (47°F) in January to 28°C (83°F) in August.
What is the rainiest month in Kocaeli?
December is the wettest month, with about 90 mm (3.5 in) of rain on average. July is the driest, with about 24 mm (0.9 in).
What is the hottest month in Kocaeli?
August is the warmest, with average highs of 28°C (83°F) and lows of 21°C (70°F). January is the coolest, with highs of 8°C (47°F) and lows of 3°C (38°F).
Does Kocaeli have a rainy season?
Not a strong one. No month averages more than 150 mm of rain; the wettest is December at about 90 mm (3.5 in).
Sources: 2001–2025 monthly averages from NASA POWER (MERRA-2 reanalysis for Gebze), forecast and current conditions from Open-Meteo. Page updated . How we rate months
Compare places in Kocaeli
Weather can differ a lot within Kocaeli: coasts, hills and mountains each have their own climate.