Vivian
Vivian Dive Site, located in the breathtaking Snowdonia region of Llanberis, is an enchanting dive spot for both novice and experienced divers alike. With a maximum depth of 18m, it offers the ideal environment for divers of all skill levels. The site boasts convenient facilities including a confined water training cage, changing rooms, a classroom, and equipment hire.
One of the standout features of Vivian Dive Site is its exceptional visibility, which remains excellent throughout the year. Unlike many other dive sites, Vivian experiences minimal silt, providing unparalleled clarity in the water. As a result, it has earned a reputation as one of the most picturesque inland dive sites in existence.
Situated in the United Kingdom, specifically in Vivian Quarry, Glan-y-Bala Tunnel, Llanddeiniolen, Llanberis, Gwynedd, Wales, LL55 4UB, this dive site is easily accessible, making it a convenient choice for divers seeking adventure in the UK waters. Whether you are a beginner or an advanced diver, Vivian Dive Site offers an unforgettable underwater experience that will leave you in awe of its natural beauty.
One of the standout features of Vivian Dive Site is its exceptional visibility, which remains excellent throughout the year. Unlike many other dive sites, Vivian experiences minimal silt, providing unparalleled clarity in the water. As a result, it has earned a reputation as one of the most picturesque inland dive sites in existence.
Situated in the United Kingdom, specifically in Vivian Quarry, Glan-y-Bala Tunnel, Llanddeiniolen, Llanberis, Gwynedd, Wales, LL55 4UB, this dive site is easily accessible, making it a convenient choice for divers seeking adventure in the UK waters. Whether you are a beginner or an advanced diver, Vivian Dive Site offers an unforgettable underwater experience that will leave you in awe of its natural beauty.
Diving Conditions Score for Vivian
7.8
GoodGood diving conditions!
The score is based on a calculation of the current weather and sea conditions.
Dive Site Overview for Vivian
Depth
14m
Visibility
6m
Experience Level
beginner
advanced
Weather Conditions for Vivian
Wave Height
0.12m
Wind Speed
15.8 m/s
Water Temp
21.1°C
Visibility
33.38km
Cloud Cover
0%
Wave Period
4.1s
Air Temperature
27.4°C
Precipitation
0 mm
Detailed 7-Day Diving Forecast for Vivian
Alpha
Dive Score Chart for Vivian
Best time to dive: 8:00 with score 8.514666666666665/10. Water conditions: Waves 0.08m, Wind 15.8 m/s.Best night dive time: 3:00 with score 8.710068027210884/10.
Chart showing hourly dive conditions including wave height, wind speed, water temperature, and visibility throughout the day.
Sunrise at Vivian: 06:00
Sunset at Vivian: 18:00
Optimal diving conditions at Vivian 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
3:00Score: 8.7/10
Waves: 0.12m (4.9s), Wind: 2.2 m/s
Safest Overall
8:00Score: 8.5/10
Waves: 0.08m (6.25s), Wind: 15.8 m/s
Best Day
8:00Score: 8.5/10
Waves: 0.08m, Wind: 15.8 m/s
Seasonal Analysis for VivianAlpha
Historical patterns and best seasons for diving at Vivian
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 Vivian
Winter
Avg. Score: 8.3/10
Winter offers the best overall diving conditions with calmer seas and better visibility, despite cooler temperatures.
Best Months for Vivian
January
Score: 8.7
December
Score: 8.7
February
Score: 7.6
Ideal Conditions for Vivian
Water Temp
15.7°C / 60.3°F
July
Visibility
16.8m / 55.1ft
December
Wave Height
0.5m / 1.6ft
December
Wave Period
8.0s
January
Seasonal Insights for Vivian
Vivian shows typical northern hemisphere patterns with July being the warmest month (15.7°C) and December the coldest (-0.1°C). The calmest conditions typically occur in December with average wave heights of 0.5m and wave periods of 8.0s. The most comfortable wave conditions are in December 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). March is usually the driest month with 0.6mm of precipitation. For beginners, the best time to visit would be during December to February, 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 25, 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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