Skip to content
Go to Dive Champ home pageDive Champ LogoDive Champ

HMS Coriolanus (Wreck)

HMS Coriolanus is a renowned wreck dive in Istria peninsular, Croatia. Situated at a significant depth, this captivating artificial reef teems with vibrant marine life, creating an illusion of a tropical dive experience. Exploring this site allows you to witness the diverse offerings of the Northern Adriatic.

Divers can expect to encounter impressive schools of sardines, graceful long Conger eels, majestic lobsters, elusive scorpions, dazzling gilt-head breams, vibrant flying gurnards, and fascinating Flabelinas. If fortune smiles upon you, you might even catch a glimpse of the magnificent Eagle ray.

HMS Coriolanus, a British Royal Navy warship of the Shakespeare class, served as a minesweeper. Its specifications include a length of 46 meters (150 feet), width of 8.5 meters (28 feet), and an armament of 1 cannon (12 pdr) and 3 MK (20 mm). Launched on September 2nd, 1940, the ship met its fate on May 5th, 1945, sinking within minutes after striking a naval mine.

Named after the esteemed actor Gnej Marcije Koriolan (Gnaeus Marcius Coriolanus) from a theatrical piece, HMS Coriolanus played a role beyond warfare and espionage, reportedly being utilized to intercept Yugoslav radio transmissions. The ship participated in significant Allied naval operations, including Operation TORCH, the North Africa landing in 1942, and Operation HUSKY, the Sicily landing in January 1945.

Resting upright on the seabed at coordinates N 45°19´09´´ / E 13°25´25´´, approximately 6 nautical miles from the coast of Novi Grad and 11 nautical miles from our dive center in Umag, HMS Coriolanus lies at a depth of 20 to 28 meters. Remarkably well-preserved, this wreck offers an excellent diving opportunity for divers with basic experience in wreck diving. It is recommended that divers possess at least an Advanced Adventures certification or higher to fully enjoy this underwater marvel.

The visibility at the dive site is approximately 11 meters, and the maximum depth reaches 27 meters. With its combination of historical significance and captivating marine life, diving at HMS Coriolanus is an unforgettable experience. Close to Grad Poreč in Istria County, Croatia, this remarkable dive site beckons advanced and expert divers to embark on an extraordinary underwater adventure.

Diving Conditions Score for HMS Coriolanus (Wreck)

8.8
Very Good

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

Dive Site Overview for HMS Coriolanus (Wreck)

Depth

27m

Visibility

11m

Experience Level

advanced
expert

Weather Conditions for HMS Coriolanus (Wreck)

Wave Height

0.22m

Wind Speed

36.8 m/s

Water Temp

26.2°C

Visibility

40.2km

Cloud Cover

100%

Wave Period

2.4s

Air Temperature

25.5°C

Precipitation

0 mm

Detailed 7-Day Diving Forecast for HMS Coriolanus (Wreck)
Alpha

Dive Score Chart for HMS Coriolanus (Wreck)

Best time to dive: 16:00 with score 9.048412698412701/10. Water conditions: Waves 0.2m, Wind 3.9 m/s.Best night dive time: 0:00 with score 8.077619047619049/10.

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

Sunrise at HMS Coriolanus (Wreck): 06:00
Sunset at HMS Coriolanus (Wreck): 18:00

Optimal diving conditions at HMS Coriolanus (Wreck) 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
16:00

Score: 9.0/10
Waves: 0.2m (2.1s), Wind: 3.9 m/s

🌙
Best Night
0:00

Score: 8.1/10
Waves: 0.04m, Wind: 48 m/s

Seasonal Analysis for HMS Coriolanus (Wreck)
Alpha

Historical patterns and best seasons for diving at HMS Coriolanus (Wreck)

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 HMS Coriolanus (Wreck)

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 HMS Coriolanus (Wreck)

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

Ideal Conditions for HMS Coriolanus (Wreck)

Water Temp

Thermometer Emoji

24.5°C / 76.1°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 HMS Coriolanus (Wreck)

HMS Coriolanus (Wreck) shows typical northern hemisphere patterns with June being the warmest month (24.5°C) and December the coldest (20.5°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 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.

42 Dive sites near HMS Coriolanus (Wreck) in

Find more dive sites in Croatia

CroatiaCroatia

Croatia

Got feedback?

Help us improve this dive site by giving us feedback.