Constanța — Water Temperature, Sea Conditions & Trends
This page provides clear and up-to-date information about water temperature for Constanța (Romania). It includes the current water temperature, daily data for the last month presented in a simple chart, and a 7-day forecast. The page also compares today’s value with typical averages for this period, shows usual monthly ranges during the year, and lists nearby beaches with short descriptions. Local weather for the next few days and general details about Constanța help you plan your visit and choose the best time for swimming.
Current Water Temperature
Water temperature in Constanța in the Black Sea 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
Water temperature in Constanța has risen over the last week and month. Currently, the sea water at this location is slightly warmer than average for this day in previous years.
According to our forecast, Water temperature in Constanța will be 21.0°C in the next 7 days. See the table below for daily data for the upcoming week.
Table of Daily Sea Temperature Data
| Date | Current | Average | Forecast |
|---|---|---|---|
| JUN 1 | 18.9°C | 18.0°C | |
| JUN 2 | 18.6°C | 18.0°C | |
| JUN 3 | 18.9°C | 18.0°C | |
| JUN 4 | 19.1°C | 18.3°C | |
| JUN 5 | 19.2°C | 18.8°C | |
| JUN 6 | 19.3°C | 19.0°C | |
| JUN 7 | 19.6°C | 19.5°C | |
| JUN 8 | 20.1°C | 19.5°C | |
| JUN 9 | 20.6°C | 19.5°C | 20.6°C |
| JUN 10 | 20.3°C | 20.7°C | |
| JUN 11 | 20.3°C | 20.7°C | |
| JUN 12 | 20.5°C | 20.8°C | |
| JUN 13 | 20.8°C | 20.8°C | |
| JUN 14 | 21.0°C | 20.9°C | |
| JUN 15 | 20.8°C | 20.9°C | |
| JUN 16 | 21.0°C | 21.0°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.
Water temperature data for this location is gathered from various sources, including buoys and satellite sea and ocean surface maps provided by the NOAA agency. We also incorporate data from local authorities in each specific location worldwide to ensure more accurate temperature readings.
Annual Water Temperature Overview by Month
Monthly Water Temp Ranges
Annual Water Temperature Trend
Constanța, a coastal city on Romania’s Black Sea shore, experiences marked seasonal variation in sea temperatures that influence swimming conditions. In winter (December–February) surface waters are typically around 5–8 °C. Spring (March–May) sees a steady rise, with values commonly between 8–18 °C as the sea warms. Summer (June–August) is the warmest period, when coastal temperatures generally reach 20–26 °C and can peak higher in calm, sheltered areas. In autumn (September–November) the water cools again, typically ranging from about 12–20 °C depending on monthly weather patterns and wind-driven mixing. Local factors such as shallow bays, wind, and occasional freshwater runoff can cause short-term fluctuations in these averages.
Monthly Water Temperature Range (Min, Max & Average)
| Month | Min | Avg | Max |
|---|---|---|---|
| January | 3°C | 7°C | 10°C |
| February | 4°C | 6°C | 8°C |
| March | 4°C | 7°C | 10°C |
| April | 5°C | 10°C | 17°C |
| May | 11°C | 15°C | 21°C |
| June | 16°C | 21°C | 27°C |
| July | 22°C | 25°C | 28°C |
| August | 22°C | 26°C | 28°C |
| September | 19°C | 23°C | 27°C |
| October | 15°C | 18°C | 23°C |
| November | 9°C | 15°C | 19°C |
| December | 6°C | 11°C | 14°C |
* Click on a month to view detailed water temperature data.
Constanța: Weather Forecast
June 10
June 11
June 12
Location, Beaches & Local Information
Nearby Beaches & Facilities
Modern Beach
Anchor Beach
Aloha Beach
Plaja Ariadna
Zoom Beach
Three Papuci Beach
Waves Beach
Plaja Trei Papuci
Myrtos Beach
Swimming Conditions
Swimming and beach holidays in Constanța are concentrated in the warmer months, when most visitors find the sea comfortable for bathing. The nearby long sandy beaches and organized stretches offer lifeguards and facilities during the high season, and family-friendly spots are popular for sunbathing and shallow swimming. Water sports and boat excursions are widely available, while September often provides a pleasant late-season option with still-warm water. Swimmers should be mindful of changing conditions—wind can produce waves and currents, and water clarity varies—so checking local notices and choosing supervised beaches enhances safety and enjoyment.