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Lom Šífr - Svobodné Heřmanice

The Šífr quarry, located near the small Czech village of Svobodné Heřmanice, is a must-visit destination for divers. Situated approximately 140 km from Žilina, near Opava, this slate quarry offers a splendid diving experience. With dimensions of around 500 meters in length and 30-70 meters in width, the quarry reaches depths of up to 36 meters. It is worth noting that this underwater paradise sits at an altitude of 450 meters above sea level.

One of the main attractions at the Šífr quarry is the fascinating flooded diving caisson. This site also boasts other interesting features such as a well and a telephone booth. Additionally, divers can encounter various species of fish and crayfish, adding to the allure of exploring this underwater marvel.

Diving in Svobodné Heřmanice is a truly extraordinary experience, catering to divers of all levels, from beginners to experts. The site holds historical significance as it previously served as a test and research area for Czechoslovak divers. Many diving apparatuses were tested here, and numerous research dives were conducted, particularly focusing on the study of human behavior during extended underwater stays. As a result of these research endeavors, a caisson was submerged at a depth of 18 meters, designed to enable longer durations underwater. To this day, the caisson remains accessible to divers. However, it is essential to exercise caution and adhere to safety measures. Upon surfacing in the caisson, it is crucial to breathe only through the regulator, as the atmosphere within the caisson lacks sufficient oxygen due to corrosion.

Despite being challenging due to year-round lower water temperatures and depths exceeding 30 meters, diving at this quarry is still sought after by Czech and Polish diving schools as part of their basic Open Water Diver (OWD) courses. The coordinates for this exceptional diving spot are N49 56.450, E017 39.385.

For divers seeking an awe-inspiring adventure, the Šífr quarry in Svobodné Heřmanice, Czechia, offers an unforgettable experience. With a visibility of approximately 6 meters, maximum depths reaching 28 meters, and catering to divers of all levels, this dive site is a hidden gem waiting to be explored. Situated near the picturesque location of 4422, Staré Heřminovy, in the Bruntál district of Moravskoslezský kraj, Moravia-Silesia, Czechia, the quarry awaits divers with its captivating underwater world.

Diving Conditions Score for Lom Šífr - Svobodné Heřmanice

6.1
Above Average

Decent conditions, proceed with caution.
The score is based on a calculation of the current weather and sea conditions.

Dive Site Overview for Lom Šífr - Svobodné Heřmanice

Depth

28m

Visibility

6m

Experience Level

beginner
advanced
expert

Weather Conditions for Lom Šífr - Svobodné Heřmanice

Wave Height

1m

Wind Speed

10 m/s

Water Temp

18°C

Visibility

15km

Cloud Cover

57.5%

Wave Period

8s

Air Temperature

20°C

Precipitation

0 mm

Detailed 7-Day Diving Forecast for Lom Šífr - Svobodné Heřmanice
Alpha

Dive Score Chart for Lom Šífr - Svobodné Heřmanice

Best time to dive: 6:00 with score 7.113333333333333/10. Water conditions: Waves 1m, Wind 10 m/s.Best night dive time: 0:00 with score 6.613333333333333/10.

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

Sunrise at Lom Šífr - Svobodné Heřmanice: 06:00
Sunset at Lom Šífr - Svobodné Heřmanice: 18:00

Optimal diving conditions at Lom Šífr - Svobodné Heřmanice 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
6:00

Score: 7.1/10
Waves: 1m (8s), Wind: 10 m/s

🌙
Best Night
0:00

Score: 6.6/10
Waves: 1m, Wind: 10 m/s

Seasonal Analysis for Lom Šífr - Svobodné Heřmanice
Alpha

Historical patterns and best seasons for diving at Lom Šífr - Svobodné Heřmanice

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 Lom Šífr - Svobodné Heřmanice

Winter

Avg. Score: 10.0/10

Winter offers the best overall diving conditions with calmer seas and better visibility, despite cooler temperatures.

Best Months for Lom Šífr - Svobodné Heřmanice

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

Ideal Conditions for Lom Šífr - Svobodné Heřmanice

Water Temp

Thermometer Emoji

25.0°C / 77.0°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 Lom Šífr - Svobodné Heřmanice

Lom Šífr - Svobodné Heřmanice shows typical northern hemisphere patterns with June being the warmest month (25.0°C) and December the coldest (21.0°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.

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