Castropol — Water Temperature, Sea Conditions & Trends
This page provides clear and up-to-date information about water temperature for Castropol (Spain). 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 Castropol help you plan your visit and choose the best time for swimming.
Current Water Temperature
Water temperature in Castropol in the Atlantic Ocean today is 20°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 Castropol rose over the last 30 days but fell over the last week. Currently, the sea water temperature at this location matches the average for this day in previous years.
According to our forecast, Water temperature in Castropol will be 20.1°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 |
|---|---|---|---|
| AUG 3 | 20.1°C | 19.8°C | |
| AUG 4 | 20.1°C | 20.0°C | |
| AUG 5 | 20.4°C | 19.8°C | |
| AUG 6 | 20.6°C | 19.8°C | |
| AUG 7 | 20.2°C | 19.8°C | |
| AUG 8 | 20.0°C | 19.8°C | |
| AUG 9 | 20.0°C | 19.5°C | |
| AUG 10 | 19.9°C | 19.5°C | |
| AUG 11 | 20.2°C | 19.8°C | 20.2°C |
| AUG 12 | 20.0°C | 20.2°C | |
| AUG 13 | 20.0°C | 20.2°C | |
| AUG 14 | 19.8°C | 20.1°C | |
| AUG 15 | 20.0°C | 20.1°C | |
| AUG 16 | 19.0°C | 20.1°C | |
| AUG 17 | 20.0°C | 20.1°C | |
| AUG 18 | 20.0°C | 20.1°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
Castropol sits on the western tip of Asturias where the Eo River meets the Cantabrian Sea, giving the area a mix of estuarine and open-coast conditions. Water temperature varies with the seasons: in winter (December–February) surface temperatures are typically around 11–13 °C, spring (March–May) brings a gradual rise to roughly 12–15 °C, and summer (June–August) is the warmest period with typical values of 16–20 °C. During autumn (September–November) temperatures generally fall back to about 14–17 °C as winds and rainfall increase. Local microclimates mean the estuary can be slightly milder than exposed coastlines, but tidal exchange and Atlantic swells keep temperatures modest compared with more southerly Spanish waters.
Monthly Water Temperature Range (Min, Max & Average)
| Month | Min | Avg | Max |
|---|---|---|---|
| January | 12°C | 13°C | 16°C |
| February | 11°C | 13°C | 15°C |
| March | 11°C | 13°C | 15°C |
| April | 11°C | 13°C | 15°C |
| May | 12°C | 15°C | 17°C |
| June | 14°C | 17°C | 19°C |
| July | 16°C | 19°C | 22°C |
| August | 17°C | 20°C | 22°C |
| September | 15°C | 19°C | 22°C |
| October | 14°C | 18°C | 21°C |
| November | 14°C | 16°C | 18°C |
| December | 13°C | 15°C | 17°C |
* Click on a month to view detailed water temperature data.
Castropol: Weather Forecast
August 12
August 13
August 14
August 15
Location, Beaches & Local Information
Nearby Beaches & Facilities
Playa De Las Acenas
Playa De Arnela
Os Bloques
Praia Dos Bloques
Playa De Salias
Playa Mendia
Playa De Figueras
Playa Del Canon
Playa De Arnao
Swimming Conditions
Swimming around Castropol is most popular in the summer months when air and sea temperatures are highest and beach services are more frequently available. The area offers a mix of sandy coves, shingle beaches and rocky shorelines, plus calmer spots inside the estuary that are better suited to families or less confident swimmers. Water can remain cool even in high summer, so many visitors prefer short dips, wetsuits, or sheltered bathing spots; currents and tides should be respected, particularly near channels and headlands. Besides traditional beachdays, the coastline suits paddle sports, shoreline exploration and tidal pool visits, making Castropol a pleasant option for a quieter beach holiday focused on nature rather than hot-water bathing.