Lake İznik — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Lake İznik, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Lake İznik today is 24.1°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
✅ As of today, the minimum water temperature ranges from 75°F (23°C) to 79°F (26°C). This is a very comfortable temperature for swimming, and many people can enjoy prolonged stays in the water without feeling cold. The water is pleasantly warm, making it ideal for relaxation and water sports. This temperature range is particularly popular among tourists, as it combines comfort and safety for health. 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 |
|---|---|---|---|
| JUN 3 | 22.0°C | 28.0°C | |
| JUN 4 | 22.0°C | 28.0°C | |
| JUN 5 | 23.1°C | 28.0°C | |
| JUN 6 | 23.2°C | 28.0°C | |
| JUN 7 | 23.3°C | 28.0°C | |
| JUN 8 | 23.3°C | 28.0°C | |
| JUN 10 | 24.1°C | 28.0°C | |
| JUN 11 | 28.0°C | 24.3°C | |
| JUN 12 | 28.0°C | 24.5°C | |
| JUN 13 | 28.0°C | 24.7°C | |
| JUN 14 | 28.0°C | 24.9°C | |
| JUN 15 | 28.0°C | 25.1°C | |
| JUN 16 | 28.0°C | 25.3°C | |
| JUN 17 | 28.0°C | 25.5°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 | 6°C | 10°C | 13°C |
| February | 8°C | 12°C | 15°C |
| March | 8°C | 13°C | 17°C |
| April | 11°C | 15°C | 19°C |
| May | 13°C | 20°C | 26°C |
| June | 21°C | 28°C | 34°C |
| July | 23°C | 28°C | 34°C |
| August | 24°C | 29°C | 34°C |
| September | 22°C | 27°C | 33°C |
| October | 16°C | 20°C | 23°C |
| November | 11°C | 15°C | 19°C |
| December | 8°C | 13°C | 17°C |
Lake İznik: Water Temperature by Location
Lake İznik: Weather Forecast
June 9
June 10
June 11
June 12
June 13
Location & Local Information
İznik Gölü (Lake İznik) in Bursa experiences noticeable seasonal changes in water temperature. In winter months the lake typically cools to around 4–10 °C (39–50 °F), while spring sees a gradual rise to roughly 10–18 °C (50–64 °F). Summer is the warmest period, with surface temperatures commonly between 20–26 °C (68–79 °F), occasionally reaching upper twenties on hot spells. Autumn cooling brings temperatures back toward 15–22 °C (59–72 °F). These are general ranges for surface waters; local conditions such as wind, depth and weather patterns can cause variation from year to year.
Swimming in İznik Gölü is possible and commonly practiced, particularly in the warmer months when surface temperatures are most comfortable. Municipal and informal lakeside spots permit bathing, but safety and water quality considerations affect accessibility: there can be strong winds, sudden depth changes, and occasional algal growth or pollution that lead authorities to restrict swimming at times. Visitors are advised to use designated bathing areas when available, heed local signage and seasonal advisories, and prefer the warm-season window—roughly late May through September—when temperatures and conditions are most suitable for recreational swimming.