Las Grietas
This dive site is located parallel to the picturesque coast of Mount Ulia in Spain. It is characterized by a series of east-west facing slabs, offering divers a diverse underwater landscape to explore. The minimum depth at this site is 14 meters, while the maximum depth reaches 30 meters, providing opportunities for divers of different skill levels.
Diving at this site offers the chance to encounter a variety of marine life. Schools of pea, bogas, and bream can be spotted swimming along the banks, accompanied by triggerfish and moons. The underwater environment is also home to a wide range of fascinating creatures, including nudibranchs, octopus, cuttlefish, conger eels, spider crabs, and scrapie.
With a visibility of 6 meters, divers can enjoy clear underwater views and admire the vibrant marine ecosystem. This site is suitable for both beginner and advanced divers, offering different depths to cater to various skill levels.
Located near Atalaundiko bidea, Ulia, San Sebastián, Donostialdea, Gipuzkoa, Autonomous Community of the Basque Country, 20013, Spain, this dive site is easily accessible for divers seeking an unforgettable underwater experience in Spain.
Diving at this site offers the chance to encounter a variety of marine life. Schools of pea, bogas, and bream can be spotted swimming along the banks, accompanied by triggerfish and moons. The underwater environment is also home to a wide range of fascinating creatures, including nudibranchs, octopus, cuttlefish, conger eels, spider crabs, and scrapie.
With a visibility of 6 meters, divers can enjoy clear underwater views and admire the vibrant marine ecosystem. This site is suitable for both beginner and advanced divers, offering different depths to cater to various skill levels.
Located near Atalaundiko bidea, Ulia, San Sebastián, Donostialdea, Gipuzkoa, Autonomous Community of the Basque Country, 20013, Spain, this dive site is easily accessible for divers seeking an unforgettable underwater experience in Spain.
Diving Conditions Score for Las Grietas
7.9
GoodGood diving conditions!
The score is based on a calculation of the current weather and sea conditions.
Dive Site Overview for Las Grietas
Depth
23m
Visibility
6m
Experience Level
beginner
advanced
Weather Conditions for Las Grietas
Wave Height
0.36m
Wind Speed
15.5 m/s
Water Temp
24.4°C
Visibility
54.74km
Cloud Cover
0%
Wave Period
5.45s
Air Temperature
25.5°C
Precipitation
0 mm
Detailed 7-Day Diving Forecast for Las Grietas
Alpha
Dive Score Chart for Las Grietas
Best time to dive: 16:00 with score 8.743522012578616/10. Water conditions: Waves 0.4m, Wind 3.4 m/s.Best night dive time: 0:00 with score 8.499513381995133/10.
Chart showing hourly dive conditions including wave height, wind speed, water temperature, and visibility throughout the day.
Sunrise at Las Grietas: 06:00
Sunset at Las Grietas: 18:00
Optimal diving conditions at Las Grietas 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.
Best Overall
16:00Score: 8.7/10
Waves: 0.4m (5.3s), Wind: 3.4 m/s
Best Night
0:00Score: 8.5/10
Waves: 0.48m, Wind: 4.8 m/s
Seasonal Analysis for Las GrietasAlpha
Historical patterns and best seasons for diving at Las Grietas
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 Las Grietas
Winter
Avg. Score: 9.9/10
Winter offers the best overall diving conditions with calmer seas and better visibility, despite cooler temperatures.
Best Months for Las Grietas
January
Score: 10.0
February
Score: 9.9
December
Score: 9.8
Ideal Conditions for Las Grietas
Water Temp
24.3°C / 75.7°F
June
Visibility
20.1m / 65.9ft
October
Wave Height
0.2m / 0.7ft
January
Wave Period
8.0s
January
Seasonal Insights for Las Grietas
Las Grietas shows typical northern hemisphere patterns with June being the warmest month (24.3°C) and December the coldest (20.3°C). The calmest conditions typically occur in January with average wave heights of 0.2m 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 22, 2026
Note: This dive site is not a verified dive site. Please dive with caution. This dive site might have incorrect information by the community.
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