El Seno
The marine life in this area is abundant and diverse. Divers can expect to encounter fascinating creatures such as lobsters, spider crabs, conger eels, San Pedro fish, octopus, cuttlefish, baby squid, scrapie, nudibranchs, and planarians. The captivating underwater scenery mirrors the above-water mountain, with slabs arranged in a west-east orientation. These slabs extend to a sandy area at a depth of approximately 25 meters, adjacent to the entrance channel.
Exploring this site offers limitless possibilities, thanks to its immense variety of underwater formations and artifacts. In addition to the archaeological remains, which include anchors from the 16th to 18th centuries, canyons, and ceramic fragments, divers can find sanctuary in the crevices and rocky gaps that harbor conger eels, lobsters, spider crabs, octopus, nudibranchs, and planarians. Beautiful gorgonians add a touch of elegance to the landscape, and if you're lucky, you may even catch a glimpse of the elusive San Pedro fish.
With a visibility of approximately 5 meters and a maximum depth of 21 meters, this dive site is suitable for divers of various skill levels. Whether you're a beginner or an advanced diver, you'll be able to appreciate the wonders that await you beneath the surface. Located in Pasai San Pedro, Pasaia, in the Donostialdea region of Gipuzkoa within the Autonomous Community of the Basque Country, this diving spot in Spain offers a truly remarkable underwater experience.
Diving Conditions Score for El Seno
Good diving conditions!
The score is based on a calculation of the current weather and sea conditions.
Dive Site Overview for El Seno
Depth
21m
Visibility
5m
Experience Level
Weather Conditions for El Seno
Wave Height
0.42m
Wind Speed
5.8 m/s
Water Temp
24.4°C
Visibility
25.38km
Cloud Cover
100%
Wave Period
5.5s
Air Temperature
32.3°C
Precipitation
0 mm
Dive Score Chart for El Seno
Best time to dive: 8:00 with score 8.233623188405797/10. Water conditions: Waves 0.5m, Wind 5.6 m/s.Best night dive time: 3:00 with score 8.101212121212122/10.
Chart showing hourly dive conditions including wave height, wind speed, water temperature, and visibility throughout the day.
Optimal diving conditions at El Seno are affected by daylight hours. Sunrise occurs at 06:00 and sunset at 18:00, which impacts visibility and water temperature for scuba diving and snorkeling.
Score: 8.2/10
Waves: 0.5m (5.75s), Wind: 5.6 m/s
Score: 8.1/10
Waves: 0.56m, Wind: 2.5 m/s
Seasonal Analysis for El SenoAlpha
Historical patterns and best seasons for diving at El Seno
The dive score combines all factors to rate overall diving conditions throughout the year. Higher scores indicate better diving conditions.
Monthly Dive Score Analysis - Seasonal Diving Conditions
Higher values indicate better diving conditions
Seasonal DiveScore Chart
This chart displays monthly diveScore data throughout the year, showing seasonal patterns. The data is presented as a bar chart with an overlaid line graph.Dive scores range from 1 to 10, with 10 being optimal conditions.
Higher values indicate better diving conditions
Best Season for El Seno
Winter
Winter offers the best overall diving conditions with calmer seas and better visibility, despite cooler temperatures.
Best Months for El Seno
Ideal Conditions for El Seno
Water Temp
20.7°C / 69.3°F
July
Visibility
17.7m / 58.1ft
January
Wave Height
0.4m / 1.3ft
January
Wave Period
8.0s
January
Seasonal Insights for El Seno
El Seno shows typical northern hemisphere patterns with July being the warmest month (20.7°C) and January the coldest (4.2°C). The calmest conditions typically occur in January with average wave heights of 0.4m and wave periods of 8.0s. The most comfortable wave conditions are in January with a low wave steepness ratio, creating gentler swells. January offers the longest wave periods (8.0s), creating more comfortable and predictable conditions for boat entries and exits. Ocean currents are slowest in January (0.5m/s) and strongest in January (0.5m/s). January is usually the driest month with 0.0mm of precipitation. For beginners, the best time to visit would be during January to March, when ocean conditions are calmer with long-period waves and currents are typically weaker. Experienced divers might enjoy the challenges and potentially better visibility during the shoulder seasons, with moderate currents that can improve marine life encounters.
Last updated: 1 min. ago - Jun 21, 2026