Costa Bonita — Water Temperature, Sea Conditions & Trends
This page provides clear and up-to-date information about water temperature for Costa Bonita (Buenos Aires Province, Argentina). 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 Costa Bonita help you plan your visit and choose the best time for swimming.
Current Water Temperature
Water temperature in Costa Bonita in the Argentinean Sea today is 12°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
❌ As of today, the minimum water temperature ranges from 50°F (10°C) to 54°F (12°C). The water is slightly warmer, but still cool for most people. Swimming in such conditions is possible, but for most people, the time spent in the water should be limited to avoid hypothermia. Even experienced swimmers may feel discomfort if they stay in the water for too long. To improve comfort and safety, a wetsuit can be used.
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 Costa Bonita today is lower than both a week ago and a month ago. Currently, the sea water temperature at this location matches the average for this day in previous years.
According to our forecast, Water temperature in Costa Bonita will be 11.2°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 25 | 12.3°C | 17.0°C | |
| JUN 26 | 12.3°C | 16.8°C | |
| JUN 27 | 12.3°C | 14.3°C | |
| JUN 28 | 12.0°C | 14.0°C | |
| JUN 29 | 11.9°C | 13.5°C | |
| JUN 30 | 11.5°C | 12.0°C | |
| JUL 1 | 11.5°C | 12.0°C | |
| JUL 2 | 11.6°C | 11.8°C | |
| JUL 3 | 11.5°C | 11.8°C | 11.5°C |
| JUL 4 | 12.3°C | 11.5°C | |
| JUL 5 | 11.8°C | 11.4°C | |
| JUL 6 | 11.5°C | 11.4°C | |
| JUL 7 | 11.3°C | 11.3°C | |
| JUL 8 | 11.0°C | 11.3°C | |
| JUL 9 | 11.0°C | 11.2°C | |
| JUL 10 | 11.3°C | 11.2°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
Costa Bonita, on the Atlantic coast of Buenos Aires Province, is a small seaside locality with long sandy beaches and typically temperate ocean conditions. Surface water temperatures follow the regional pattern: in summer (December–February) seas are warmest, commonly around 20–24 °C, making swimming comfortable for most visitors. During autumn (March–May) water cools to roughly 16–20 °C as the ocean gradually loses heat. Winter months (June–August) bring the coldest conditions, with sea temperatures generally between 8 and 13 °C, when swimming is less common and local services reduce operations. In spring (September–November) the water warms again, often measuring about 12–18 °C, so conditions steadily improve toward the high season.
Monthly Water Temperature Range (Min, Max & Average)
| Month | Min | Avg | Max |
|---|---|---|---|
| January | 16°C | 20°C | 23°C |
| February | 17°C | 21°C | 23°C |
| March | 16°C | 20°C | 23°C |
| April | 14°C | 19°C | 21°C |
| May | 12°C | 16°C | 19°C |
| June | 10°C | 13°C | 16°C |
| July | 9°C | 11°C | 13°C |
| August | 8°C | 11°C | 12°C |
| September | 8°C | 11°C | 12°C |
| October | 10°C | 13°C | 15°C |
| November | 12°C | 15°C | 18°C |
| December | 14°C | 17°C | 21°C |
* Click on a month to view detailed water temperature data.
Costa Bonita: Weather Forecast
July 4
July 5
July 6
Location, Beaches & Local Information
Nearby Beaches & Facilities
Balneario Costa Bonita
Playa Zombie
Bahia De Los Vientos
Bahia De Los Vientos Quequen
Quequen
Arenas Verdes
Complejo Sol A Sol
Escollera Quequen
Club La Virazon
Swimming Conditions
Swimming and beach holidays at Costa Bonita are shaped by those seasonal temperatures and by typical coastal features: wide sandy stretches, generally moderate surf, and open-ocean exposure that can produce stronger currents on occasion. The warmest period for comfortable bathing is from December through March, when lifeguards and tourist facilities are most likely to be available and the sea at 20–24 °C is inviting for families and casual swimmers. Outside peak months, visitors can still enjoy walks, sunbathing and shoreline paddling, though full swimming sessions may require greater tolerance for cooler water or the use of wetsuits during spring and autumn when temperatures are closer to 12–18 °C. As with any open coast, swimmers should heed local safety flags and guidance about currents and weather, especially when venturing beyond shallow areas.