Kastamonu — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Kastamonu, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Kastamonu today is 21°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
✅ As of today, the minimum water temperature ranges from 68°F (20°C) to 74°F (23°C). The water is warm and pleasant for swimming, and in this range, one can stay in the water for extended periods without the risk of hypothermia. This is the ideal temperature for relaxation, swimming, and water sports. Families with children, as well as outdoor enthusiasts, will enjoy swimming and time spent in the water. For most people, this is the optimal temperature for a comfortable beach experience. 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 | 18.2°C | 19.0°C | |
| JUN 4 | 18.2°C | 19.0°C | |
| JUN 5 | 19.4°C | 19.0°C | |
| JUN 6 | 19.9°C | 19.0°C | |
| JUN 7 | 20.0°C | 19.0°C | |
| JUN 8 | 20.0°C | 19.0°C | |
| JUN 10 | 21.0°C | 19.0°C | |
| JUN 11 | 19.0°C | 20.9°C | |
| JUN 12 | 19.0°C | 20.8°C | |
| JUN 13 | 19.0°C | 20.7°C | |
| JUN 14 | 19.0°C | 20.6°C | |
| JUN 15 | 19.0°C | 20.5°C | |
| JUN 16 | 19.0°C | 20.4°C | |
| JUN 17 | 19.0°C | 20.3°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 | 3°C | 7°C | 10°C |
| February | 3°C | 7°C | 10°C |
| March | 5°C | 9°C | 13°C |
| April | 8°C | 12°C | 16°C |
| May | 11°C | 17°C | 22°C |
| June | 14°C | 19°C | 24°C |
| July | 16°C | 21°C | 26°C |
| August | 17°C | 22°C | 27°C |
| September | 14°C | 19°C | 24°C |
| October | 11°C | 15°C | 18°C |
| November | 8°C | 12°C | 15°C |
| December | 5°C | 8°C | 11°C |
Kastamonu: Weather Forecast
June 9
June 10
June 11
June 12
June 13
Location & Local Information
Kastamonu (in Turkish - Kastamonu) is a province with a mix of mountain-fed rivers and small lakes whose temperatures vary markedly by season and by waterbody. In winter surface temperatures in rivers and shallow lakes commonly approach freezing, about 0–6 °C (32–43 °F). During spring thaw values rise to roughly 4–12 °C (39–54 °F) but can remain cool in fast-flowing streams. In summer isolated lakes and slow-moving sections may warm to 18–26 °C (64–79 °F), while mountain rivers and shaded channels typically stay cooler, around 12–20 °C (54–68 °F). Autumn brings a steady decline, with many waters ranging from 8–16 °C (46–61 °F) before winter cooling sets in.
Swimming in Kastamonu’s inland waters is possible in summer where access and conditions permit, but it is not universally recommended or formally organized in many locations. Designated bathing areas are limited, and river swimming can be hazardous because of cold pockets, swift currents, submerged obstacles and variable water quality after rains. For safety and comfort, locals and visitors usually choose sheltered lake spots during warm months, checking for local guidance and avoiding unmarked river sections; the seasonal temperature ranges and safety considerations largely determine whether swimming is advisable.