Lake Büyükçekmece — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Lake Büyükçekmece, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Lake Büyükçekmece today is 19.5°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
⚠️ As of today, the minimum water temperature ranges from 65°F (18°C) to 68°F (20°C). This is already quite warm water, which is ideal for most people. Swimming becomes comfortable, and prolonged stays in the water do not cause discomfort. This temperature is perfect for family trips and for those who prefer warmer water. It is also comfortable for water sports such as surfing or swimming. It is important to note that these swimming tips and recommendations apply only in good weather. When the air temperature is below 68°F (20°C), and sometimes even below 77°F (25°C), swimming can be unpleasant even with relatively high water temperatures.
Water Temperature Chart Over the Last 30 Days
Table of Daily Sea Temperature Data
| Date | Current | Average | Forecast |
|---|---|---|---|
| OCT 4 | 20.6°C | 19.0°C | |
| OCT 5 | 20.4°C | 19.0°C | |
| OCT 6 | 20.4°C | 19.0°C | |
| OCT 7 | 20.4°C | 19.0°C | |
| OCT 8 | 20.3°C | 19.0°C | |
| OCT 9 | 20.2°C | 19.0°C | |
| OCT 10 | 19.5°C | 19.0°C | |
| OCT 12 | 19.0°C | 19.5°C | |
| OCT 13 | 19.0°C | 19.5°C | |
| OCT 14 | 19.0°C | 19.4°C | |
| OCT 15 | 19.0°C | 19.4°C | |
| OCT 16 | 19.0°C | 19.4°C | |
| OCT 17 | 19.0°C | 19.4°C | |
| OCT 18 | 19.0°C | 19.3°C |
* Current - Actual water temperature value
** Average - Average water temperature on this day in recent years
*** Forecast - Our water temperature forecast
Actual nearshore water temperatures may fluctuate by several degrees from the reported values, especially following heavy rainfall or extended periods of strong winds. Certain wind patterns can cause colder, deeper waters to rise and replace the sun-warmed surface water, leading to noticeable variations.
Our forecast is based on a proprietary mathematical model that considers real-time water temperature changes, historical trends, key weather patterns, wind strength and direction, and air temperature specific to each region. Additionally, we incorporate data from other resorts to enhance accuracy.
Monthly Water Temperature Range (Min, Max & Average)
| Month | Min | Avg | Max |
|---|---|---|---|
| January | 5°C | 9°C | 13°C |
| February | 6°C | 10°C | 13°C |
| March | 7°C | 12°C | 17°C |
| April | 11°C | 16°C | 20°C |
| May | 11°C | 19°C | 26°C |
| June | 18°C | 23°C | 28°C |
| July | 20°C | 25°C | 30°C |
| August | 21°C | 26°C | 32°C |
| September | 18°C | 23°C | 28°C |
| October | 14°C | 19°C | 22°C |
| November | 11°C | 15°C | 19°C |
| December | 6°C | 11°C | 14°C |
Lake Büyükçekmece: Water Temperature by Location
Lake Büyükçekmece: Weather Forecast
October 11
October 12
October 13
October 14
October 15
Location & Local Information
Lake Büyükçekmece (Büyükçekmece Gölü) lies on the European side of Istanbul and behaves like a shallow lagoon/reservoir whose temperatures follow the city’s seasonal pattern. In winter the surface typically cools to roughly 5–9 °C (41–48 °F). Spring sees a steady rise, often reaching about 10–18 °C (50–64 °F) as sunlight and air temperatures increase. Summer is when the lake is warmest, with surface readings commonly in the 20–26 °C range (68–79 °F), making the water thermally comfortable for many swimmers. During autumn the lake gradually cools again, generally falling into the 12–18 °C bracket (54–64 °F) as the weather shifts.
As for swimming, opportunities are limited and often regulated rather than openly promoted. Parts of Büyükçekmece Gölü serve as water resources and are subject to water quality monitoring, so bathing is frequently discouraged or officially restricted to protect drinking-water supplies and prevent contamination; episodic algal growth and urban runoff can also affect safety. While locals sometimes enter the water in warmer months and temperatures can be suitable for swimming in summer, most recreational bathing in the area is concentrated on nearby Marmara Sea beaches where infrastructure, lifeguards and water quality controls are clearer. Always check current local advisories before swimming.