Deba — Water Temperature, Sea Conditions & Trends
This page provides clear and up-to-date information about water temperature for Deba (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 Deba help you plan your visit and choose the best time for swimming.
Current Water Temperature
Water temperature in Deba in the Bay of Biscay today is 19°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
⚠️ As of today, the minimum water temperature ranges from 65°F (18°C) to 68°F (20°C). This is already quite warm water, which is ideal for most people. Swimming becomes comfortable, and prolonged stays in the water do not cause discomfort. This temperature is perfect for family trips and for those who prefer warmer water. It is also comfortable for water sports such as surfing or swimming.
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 Deba 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 Deba will be 19.4°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 2 | 19.9°C | 18.3°C | |
| JUN 3 | 19.6°C | 18.5°C | |
| JUN 4 | 19.4°C | 18.5°C | |
| JUN 5 | 19.5°C | 18.0°C | |
| JUN 6 | 19.6°C | 18.0°C | |
| JUN 7 | 19.4°C | 18.5°C | |
| JUN 8 | 19.0°C | 18.5°C | |
| JUN 9 | 18.9°C | 18.3°C | |
| JUN 10 | 18.9°C | 18.3°C | 18.9°C |
| JUN 11 | 18.3°C | 19.0°C | |
| JUN 12 | 18.5°C | 19.0°C | |
| JUN 13 | 19.0°C | 19.1°C | |
| JUN 14 | 18.8°C | 19.2°C | |
| JUN 15 | 19.0°C | 19.3°C | |
| JUN 16 | 19.5°C | 19.3°C | |
| JUN 17 | 19.5°C | 19.4°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
Deba is a coastal town in the Basque Country on the Bay of Biscay, known for its long sandy beach and nearby rocky cliffs where the river Deba meets the sea. Sea temperatures here follow the typical pattern of the northern Spanish coast: in winter (December–February) water averages about 12–14°C, in spring (March–May) it generally rises to 13–17°C, in summer (June–August) it reaches its warmest values around 17–22°C, and in autumn (September–November) it cools back to roughly 14–18°C. These figures can vary year to year and with short-term weather, with nearshore and estuarine waters sometimes a degree or two warmer than open-ocean readings.
Monthly Water Temperature Range (Min, Max & Average)
| Month | Min | Avg | Max |
|---|---|---|---|
| January | 11°C | 13°C | 16°C |
| February | 11°C | 13°C | 14°C |
| March | 11°C | 13°C | 15°C |
| April | 12°C | 14°C | 17°C |
| May | 13°C | 16°C | 20°C |
| June | 15°C | 19°C | 22°C |
| July | 18°C | 21°C | 24°C |
| August | 19°C | 22°C | 25°C |
| September | 17°C | 21°C | 24°C |
| October | 15°C | 19°C | 22°C |
| November | 13°C | 17°C | 19°C |
| December | 10°C | 15°C | 17°C |
* Click on a month to view detailed water temperature data.
Deba: Weather Forecast
June 10
June 11
June 12
Location, Beaches & Local Information
Nearby Beaches & Facilities
Deba / Santiago
Lapari
Playa Santiago De Deba
Deba
Playa Ondarbeltz Mutriku
Ondar-Beltz
Playa De Alkolea
Alcolea
Itxaspe Hondartza
Swimming Conditions
Swimming and beach holidays in Deba are popular in the warmer months when water temperatures are most comfortable and lifeguard services and facilities are usually in place. The main beach offers a wide, sandy area suitable for families, while nearby breaks attract surfers and bodyboarders when winds and swell pick up; these conditions also bring stronger currents and changing tides, so caution is advised. Outside the peak summer window, many visitors use wetsuits for longer swims or to enjoy water sports, and sheltered spots near the river mouth can feel slightly milder. As with any coastal destination, checking local sea-state reports and observing posted safety information will help ensure a pleasant and safe visit.