Pearl Lake
Welcome to Pearl Lake, a premier dive site located in South Beloit, Illinois. This scenic water-filled quarry, situated at 1220 Dearborn Ave Hwy 251, offers fantastic opportunities for divers of all levels to enhance their scuba skills and undergo training dives.
As an exclusive dive site, Pearl Lake is only accessible to certified Dive Shops and their divers. This ensures a safe and controlled environment for your underwater adventures. So grab your gear and come dive with us!
Prepare to be amazed by the diverse marine life that calls Pearl Lake home. During your dive, you'll have the opportunity to encounter Carp, Blue Gill, Crappie, Northern, Bass (large mouth and small mouth), and Catfish. The lake's sandy and mucky bottom, adorned with pockets of vegetation near the shallows, adds to the natural beauty of this underwater haven.
With a visibility of up to 6 meters and a maximum depth of 13 meters, Pearl Lake provides an ideal setting for both beginner and advanced divers. Whether you're just starting your scuba journey or looking to refine your skills, our site offers the perfect environment for your needs.
Located in the United States, specifically in South Beloit, Illinois, Pearl Lake is conveniently close to Pearl Lake RV Resort. So after an exhilarating dive, you can unwind and relax amidst the beautiful surroundings.
Join us at Pearl Lake for an unforgettable underwater experience. Book your dive with a certified Dive Shop and dive into the wonders that await beneath the surface.
As an exclusive dive site, Pearl Lake is only accessible to certified Dive Shops and their divers. This ensures a safe and controlled environment for your underwater adventures. So grab your gear and come dive with us!
Prepare to be amazed by the diverse marine life that calls Pearl Lake home. During your dive, you'll have the opportunity to encounter Carp, Blue Gill, Crappie, Northern, Bass (large mouth and small mouth), and Catfish. The lake's sandy and mucky bottom, adorned with pockets of vegetation near the shallows, adds to the natural beauty of this underwater haven.
With a visibility of up to 6 meters and a maximum depth of 13 meters, Pearl Lake provides an ideal setting for both beginner and advanced divers. Whether you're just starting your scuba journey or looking to refine your skills, our site offers the perfect environment for your needs.
Located in the United States, specifically in South Beloit, Illinois, Pearl Lake is conveniently close to Pearl Lake RV Resort. So after an exhilarating dive, you can unwind and relax amidst the beautiful surroundings.
Join us at Pearl Lake for an unforgettable underwater experience. Book your dive with a certified Dive Shop and dive into the wonders that await beneath the surface.
Diving Conditions Score for Pearl Lake
5
AverageAverage conditions, be alert.
The score is based on a calculation of the current weather and sea conditions.
Dive Site Overview for Pearl Lake
Depth
13m
Visibility
6m
Experience Level
beginner
advanced
Weather Conditions for Pearl Lake
Wave Height
1m
Wind Speed
17 m/s
Water Temp
18°C
Visibility
47.7km
Cloud Cover
0%
Wave Period
8s
Air Temperature
16.2°C
Precipitation
0 mm
Detailed 7-Day Diving Forecast for Pearl Lake
Alpha
Dive Score Chart for Pearl Lake
Best time to dive: 10:00 with score 7.395133333333333/10. Water conditions: Waves 1m, Wind 1.9 m/s.Best night dive time: 2:00 with score 7.043333333333333/10.
Chart showing hourly dive conditions including wave height, wind speed, water temperature, and visibility throughout the day.
Sunrise at Pearl Lake: 06:00
Sunset at Pearl Lake: 18:00
Optimal diving conditions at Pearl Lake 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
10:00Score: 7.4/10
Waves: 1m (8s), Wind: 1.9 m/s
Best Night
2:00Score: 7.0/10
Waves: 1m, Wind: 1.3 m/s
Seasonal Analysis for Pearl LakeAlpha
Historical patterns and best seasons for diving at Pearl Lake
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 Pearl Lake
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 Pearl Lake
January
Score: 10.0
February
Score: 9.9
December
Score: 9.8
Ideal Conditions for Pearl Lake
Water Temp
24.2°C / 75.6°F
June
Visibility
20.1m / 65.9ft
October
Wave Height
0.2m / 0.7ft
January
Wave Period
8.0s
January
Seasonal Insights for Pearl Lake
Pearl Lake shows typical northern hemisphere patterns with June being the warmest month (24.2°C) and December the coldest (20.2°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 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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