Le Grand Roc
Discover the breathtaking dive sites in the water with depths ranging from 30 to 40 meters. One of the highlights is the magnificent rock spanning 5 hectares, offering a diverse array of underwater features including rocky plateaus, rocky potatoes, faults, and mini drop-offs.
Immerse yourself in the vibrant world of marine life at these sites. Encounter a wide range of encrusted species such as Gorgonians, Bonélie, and Comatules. Additionally, you'll have the opportunity to observe both sedentary and active creatures including Barbers, Mostelles, Conger eels, and Lobsters.
With a maximum depth of 27 meters and visibility of 3 meters, these dive sites are best explored by advanced divers. Located in Metropolitan France, France, these sites provide an unforgettable diving experience in the captivating waters.
Immerse yourself in the vibrant world of marine life at these sites. Encounter a wide range of encrusted species such as Gorgonians, Bonélie, and Comatules. Additionally, you'll have the opportunity to observe both sedentary and active creatures including Barbers, Mostelles, Conger eels, and Lobsters.
With a maximum depth of 27 meters and visibility of 3 meters, these dive sites are best explored by advanced divers. Located in Metropolitan France, France, these sites provide an unforgettable diving experience in the captivating waters.
Diving Conditions Score for Le Grand Roc
7.5
GoodGood diving conditions!
The score is based on a calculation of the current weather and sea conditions.
Dive Site Overview for Le Grand Roc
Depth
27m
Visibility
3m
Experience Level
advanced
Weather Conditions for Le Grand Roc
Wave Height
0.34m
Wind Speed
7.1 m/s
Water Temp
21.2°C
Visibility
34.22km
Cloud Cover
0%
Wave Period
4.6s
Air Temperature
22.1°C
Precipitation
0 mm
Detailed 7-Day Diving Forecast for Le Grand Roc
Alpha
Dive Score Chart for Le Grand Roc
Best time to dive: 8:00 with score 8.79190430107527/10. Water conditions: Waves 0.36m, Wind 3.9 m/s.Best night dive time: 4:00 with score 7.624194756554307/10.
Chart showing hourly dive conditions including wave height, wind speed, water temperature, and visibility throughout the day.
Sunrise at Le Grand Roc : 06:00
Sunset at Le Grand Roc : 18:00
Optimal diving conditions at Le Grand Roc 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
8:00Score: 8.8/10
Waves: 0.36m (4.65s), Wind: 3.9 m/s
Safest Overall
7:00Score: 8.7/10
Waves: 0.38m (4.6s), Wind: 3.7 m/s
Best Night
4:00Score: 7.6/10
Waves: 0.46m, Wind: 17.7 m/s
Seasonal Analysis for Le Grand Roc Alpha
Historical patterns and best seasons for diving at Le Grand Roc
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 Le Grand Roc
Winter
Avg. Score: 7.9/10
Winter offers the best overall diving conditions with calmer seas and better visibility, despite cooler temperatures.
Best Months for Le Grand Roc
January
Score: 8.0
February
Score: 7.8
December
Score: 7.8
Ideal Conditions for Le Grand Roc
Water Temp
24.0°C / 75.2°F
July
Visibility
12.0m / 39.4ft
May
Wave Height
2.0m / 6.6ft
December
Wave Period
8.0s
January
Seasonal Insights for Le Grand Roc
Le Grand Roc shows typical northern hemisphere patterns with July being the warmest month (24.0°C) and January the coldest (6.2°C). The calmest conditions typically occur in December with average wave heights of 2.0m 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). January is usually the driest month with 0.0mm 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 21, 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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