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Cala Grande

Located just a short ten-minute boat ride away, this dive site offers an incredible experience on the open sea side of Palmaria Island, the largest island in the breathtaking Porto Venere archipelago in Italy.

As you explore the crystal-clear waters, you'll encounter a diverse range of marine life, including vibrant shrimp, benthic fish, and captivating clouds of black damsels. One of the highlights of this dive site is the opportunity to explore two caves situated in shallow water.

Cala Grande, situated along the western side of Palmaria Island, is easily recognizable, thanks to its name and status as the largest bight in the area. The maximum depth in this region is around a dozen meters, gradually increasing as you move farther from the coast. The unique underwater topography of Cala Grande makes it an ideal location for beginners looking to expand their diving skills. The distinct bay formation helps to create a calm sea with minimal current, allowing for a safe and enjoyable experience.

However, Cala Grande also presents an exciting challenge for cave diving enthusiasts. Within the darker tunnels of the caves, you'll have the opportunity to observe the fascinating organisms that thrive in this cave environment. Two caves, located opposite each other, offer contrasting experiences due to their differing submarine development.

The first cave, with an entrance at a depth of four to five meters, is a dark and evocative exploration spot perfect for underwater speleology enthusiasts. In the dimly lit corners of this cave, you'll witness the mesmerizing sight of hundreds of Palaemon serratus shrimp gracefully swimming and maneuvering, only to scatter in a flurry of activity when exposed to artificial light.

The second cave, known as the Vulcanic Cave, boasts a wider entrance and sits at a depth of six to seven meters, allowing multiple divers to explore it simultaneously. Starting from its expansive semi-submerged vault, you can venture into the submerged section, which leads to a small area characterized by a pebbly bottom. Throughout your dive, you'll notice that even though some parts may be dimly lit, you'll never be completely surrounded by darkness.

With excellent visibility of around 10 meters and a maximum depth of 18 meters, this dive site offers an unforgettable underwater adventure suitable for divers of all levels, including beginners.

Make your way to Palmaria Island in Italy's Porto Venere archipelago, within the Parco naturale regionale di Porto Venere. It's easily accessible from Via Varignano Vecchio, Case Rosse, Le Grazie, Porto Venere, La Spezia, Liguria, Italy. Prepare yourself for an extraordinary dive experience that will leave you with lasting memories.

Diving Conditions Score for Cala Grande

9.5
Excellent

Excellent diving conditions!
The score is based on a calculation of the current weather and sea conditions.

Dive Site Overview for Cala Grande

Depth

18m

Visibility

10m

Experience Level

beginner

Weather Conditions for Cala Grande

Wave Height

0.1m

Wind Speed

1.6 m/s

Water Temp

24.5°C

Visibility

40.8km

Cloud Cover

0%

Wave Period

3.4s

Air Temperature

25°C

Precipitation

0 mm

Detailed 7-Day Diving Forecast for Cala Grande
Alpha

Dive Score Chart for Cala Grande

Best time to dive: 7:00 with score 9.990096618357487/10. Water conditions: Waves 0.1m, Wind 0.7 m/s.Best night dive time: 0:00 with score 9.485882352941177/10.

Chart showing hourly dive conditions including wave height, wind speed, water temperature, and visibility throughout the day.

Sunrise at Cala Grande: 06:00
Sunset at Cala Grande: 18:00

Optimal diving conditions at Cala Grande 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
7:00

Score: 10.0/10
Waves: 0.1m (3.45s), Wind: 0.7 m/s

🌙
Best Night
0:00

Score: 9.5/10
Waves: 0.06m, Wind: 1.8 m/s

Seasonal Analysis for Cala Grande
Alpha

Historical patterns and best seasons for diving at Cala Grande

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 Cala Grande

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 Cala Grande

January
Score: 10.0
February
Score: 9.9
December
Score: 9.8

Ideal Conditions for Cala Grande

Water Temp

Thermometer Emoji

24.4°C / 75.9°F

June

Visibility

Telescope Emoji

20.1m / 65.9ft

October

Wave Height

Wave Emoji

0.2m / 0.7ft

January

Wave Period

Wave Emoji

8.0s

January

Seasonal Insights for Cala Grande

Cala Grande shows typical northern hemisphere patterns with June being the warmest month (24.4°C) and December the coldest (20.4°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.

Scoring Legend:
9-10 (Excellent)
7-8 (Good)
5-6 (Average)
3-4 (Poor)
1-2 (Dangerous)

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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