Portroe Quarry
Portroe Quarry, located in Castletown, The Municipal District of Nenagh, County Tipperary, Munster, Ireland, is an ideal dive site for both scuba and free divers. With depths ranging from 6m to 40m and excellent visibility of around 9m, divers can enjoy captivating underwater experiences throughout the year.
The quarry boasts an array of fascinating features including submerged cars, boats, mirrors, and even an underwater internet cafe and bar, providing divers with unique and exciting sights to explore. While Portroe Quarry is primarily an artificial dive site, marine life can occasionally be found, although it may vary.
This dive site is particularly beneficial during the winter months as it allows divers to log their dives in specific depths. Additionally, the new platform now facilitates confined water dives, making it a valuable location for basic training. Atlantic Scuba Adventures frequently utilizes Portroe Quarry when sea conditions are unfavorable or occasionally organizes trips to introduce divers to new and exciting locations.
Whether you're a beginner, advanced, or expert-level diver, Portroe Quarry in Ireland offers a diverse range of underwater experiences that are sure to satisfy your diving aspirations.
The quarry boasts an array of fascinating features including submerged cars, boats, mirrors, and even an underwater internet cafe and bar, providing divers with unique and exciting sights to explore. While Portroe Quarry is primarily an artificial dive site, marine life can occasionally be found, although it may vary.
This dive site is particularly beneficial during the winter months as it allows divers to log their dives in specific depths. Additionally, the new platform now facilitates confined water dives, making it a valuable location for basic training. Atlantic Scuba Adventures frequently utilizes Portroe Quarry when sea conditions are unfavorable or occasionally organizes trips to introduce divers to new and exciting locations.
Whether you're a beginner, advanced, or expert-level diver, Portroe Quarry in Ireland offers a diverse range of underwater experiences that are sure to satisfy your diving aspirations.
Diving Conditions Score for Portroe Quarry
5.3
AverageAverage conditions, be alert.
The score is based on a calculation of the current weather and sea conditions.
Dive Site Overview for Portroe Quarry
Depth
22m
Visibility
9m
Experience Level
beginner
advanced
expert
Weather Conditions for Portroe Quarry
Wave Height
1m
Wind Speed
9 m/s
Water Temp
18°C
Visibility
28.78km
Cloud Cover
13%
Wave Period
8s
Air Temperature
12°C
Precipitation
0 mm
Detailed 7-Day Diving Forecast for Portroe Quarry
Alpha
Dive Score Chart for Portroe Quarry
Best time to dive: 11:00 with score 6.919233333333333/10. Water conditions: Waves 1m, Wind 8.3 m/s.Best night dive time: 0:00 with score 6.991633333333334/10.
Chart showing hourly dive conditions including wave height, wind speed, water temperature, and visibility throughout the day.
Sunrise at Portroe Quarry: 06:00
Sunset at Portroe Quarry: 18:00
Optimal diving conditions at Portroe Quarry 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
0:00Score: 7.0/10
Waves: 1m (8s), Wind: 2.9 m/s
Safest Overall
11:00Score: 6.9/10
Waves: 1m (8s), Wind: 8.3 m/s
Best Day
11:00Score: 6.9/10
Waves: 1m, Wind: 8.3 m/s
Seasonal Analysis for Portroe QuarryAlpha
Historical patterns and best seasons for diving at Portroe Quarry
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 Portroe Quarry
Winter
Avg. Score: 8.5/10
Winter offers the best overall diving conditions with calmer seas and better visibility, despite cooler temperatures.
Best Months for Portroe Quarry
January
Score: 8.8
December
Score: 8.8
February
Score: 7.8
Ideal Conditions for Portroe Quarry
Water Temp
16.3°C / 61.3°F
July
Visibility
17.7m / 58.1ft
December
Wave Height
0.5m / 1.6ft
December
Wave Period
8.0s
January
Seasonal Insights for Portroe Quarry
Portroe Quarry shows typical northern hemisphere patterns with July being the warmest month (16.3°C) and December the coldest (0.3°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 0.0mm 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 20, 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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