Millbrook Quarry
Millbrook Quarry, also referred to as Lake Millbrook, is an easily accessible freshwater dive site located in Haymarket, VA 20143. With a maximum depth of 91-100ft/28-30m and an average visibility of 11-15ft/3-5m, this site offers an engaging underwater experience for divers of all skill levels.
Divers will find training platforms conveniently positioned off both beaches, allowing for practical skill development. However, it is important to note that as of March 2020, Millbrook Quarry is temporarily closed. The property owner is currently in discussions with new leaseholders, indicating the potential for future opportunities to explore this captivating dive site.
With an enhanced understanding of the site's features, it becomes apparent that Millbrook Quarry boasts an impressive maximum depth of 12m and visibility of 4m. These factors contribute to the overall appeal for beginners and advanced divers alike.
Divers can take advantage of the site's convenient location in Haymarket, VA 20143, which is situated near John Marshall Highway, Prince William County, Virginia, 20137, United States. This proximity makes Millbrook Quarry easily accessible for divers from all over the country.
Whether you are a beginner looking to take your first plunge into the world of diving or an experienced diver seeking new underwater adventures, Millbrook Quarry offers an enticing experience in a freshwater setting. Keep an eye out for updates on the site's reopening for an opportunity to explore this remarkable dive site.
Divers will find training platforms conveniently positioned off both beaches, allowing for practical skill development. However, it is important to note that as of March 2020, Millbrook Quarry is temporarily closed. The property owner is currently in discussions with new leaseholders, indicating the potential for future opportunities to explore this captivating dive site.
With an enhanced understanding of the site's features, it becomes apparent that Millbrook Quarry boasts an impressive maximum depth of 12m and visibility of 4m. These factors contribute to the overall appeal for beginners and advanced divers alike.
Divers can take advantage of the site's convenient location in Haymarket, VA 20143, which is situated near John Marshall Highway, Prince William County, Virginia, 20137, United States. This proximity makes Millbrook Quarry easily accessible for divers from all over the country.
Whether you are a beginner looking to take your first plunge into the world of diving or an experienced diver seeking new underwater adventures, Millbrook Quarry offers an enticing experience in a freshwater setting. Keep an eye out for updates on the site's reopening for an opportunity to explore this remarkable dive site.
Diving Conditions Score for Millbrook Quarry
6.3
Above AverageDecent conditions, proceed with caution.
The score is based on a calculation of the current weather and sea conditions.
Dive Site Overview for Millbrook Quarry
Depth
12m
Visibility
4m
Experience Level
beginner
advanced
Weather Conditions for Millbrook Quarry
Wave Height
1m
Wind Speed
11.4 m/s
Water Temp
18°C
Visibility
47.5km
Cloud Cover
0%
Wave Period
8s
Air Temperature
28.1°C
Precipitation
0 mm
Detailed 7-Day Diving Forecast for Millbrook Quarry
Alpha
Dive Score Chart for Millbrook Quarry
Best time to dive: 12:00 with score 8.005533333333332/10. Water conditions: Waves 1m, Wind 1.5 m/s.Best night dive time: 5:00 with score 7.374333333333333/10.
Chart showing hourly dive conditions including wave height, wind speed, water temperature, and visibility throughout the day.
Sunrise at Millbrook Quarry: 06:00
Sunset at Millbrook Quarry: 18:00
Optimal diving conditions at Millbrook 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
12:00Score: 8.0/10
Waves: 1m (8s), Wind: 1.5 m/s
Best Night
5:00Score: 7.4/10
Waves: 1m, Wind: 3.1 m/s
Seasonal Analysis for Millbrook QuarryAlpha
Historical patterns and best seasons for diving at Millbrook 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 Millbrook Quarry
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 Millbrook Quarry
January
Score: 10.0
February
Score: 9.9
December
Score: 9.8
Ideal Conditions for Millbrook Quarry
Water Temp
23.9°C / 75.0°F
June
Visibility
20.1m / 65.9ft
October
Wave Height
0.2m / 0.7ft
January
Wave Period
8.0s
January
Seasonal Insights for Millbrook Quarry
Millbrook Quarry shows typical northern hemisphere patterns with June being the warmest month (23.9°C) and December the coldest (19.9°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.
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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