Crater Jr.
Explore the captivating dive site situated in the pristine waters of Upper Matecumbe Key, Islamorada, Monroe County, Florida, United States. With a maximum depth of 16 meters and excellent visibility of up to 14 meters, this dive spot is perfect for beginner divers seeking an unforgettable underwater adventure.
At a depth range of 30-50 feet, this dive site offers similar features to Crater, including a sandy area embraced by stunning spur and groove coral formations. Immerse yourself in the awe-inspiring marine environment, where you may encounter elusive batfish, a rare sighting in these waters. Additionally, be prepared to be surrounded by vibrant schools of snapper, grunts, and parrotfish, creating a mesmerizing underwater spectacle.
Don't miss the opportunity to explore this exceptional dive site, a hidden gem in the mesmerizing waters of Florida. Plan your dive at this extraordinary location and discover the beauty that lies beneath the surface.
At a depth range of 30-50 feet, this dive site offers similar features to Crater, including a sandy area embraced by stunning spur and groove coral formations. Immerse yourself in the awe-inspiring marine environment, where you may encounter elusive batfish, a rare sighting in these waters. Additionally, be prepared to be surrounded by vibrant schools of snapper, grunts, and parrotfish, creating a mesmerizing underwater spectacle.
Don't miss the opportunity to explore this exceptional dive site, a hidden gem in the mesmerizing waters of Florida. Plan your dive at this extraordinary location and discover the beauty that lies beneath the surface.
Diving Conditions Score for Crater Jr.
8
Very GoodVery good diving conditions!
The score is based on a calculation of the current weather and sea conditions.
Dive Site Overview for Crater Jr.
Depth
16m
Visibility
14m
Experience Level
beginner
Weather Conditions for Crater Jr.
Wave Height
0.42m
Wind Speed
13.9 m/s
Water Temp
28.6°C
Visibility
13.4km
Cloud Cover
100%
Wave Period
4.65s
Air Temperature
27.2°C
Precipitation
0 mm
Detailed 7-Day Diving Forecast for Crater Jr.
Alpha
Dive Score Chart for Crater Jr.
Best time to dive: 8:00 with score 8.785815602836879/10. Water conditions: Waves 0.48m, Wind 3.8 m/s.Best night dive time: 4:00 with score 8.534444444444444/10.
Chart showing hourly dive conditions including wave height, wind speed, water temperature, and visibility throughout the day.
Sunrise at Crater Jr.: 06:00
Sunset at Crater Jr.: 18:00
Optimal diving conditions at Crater Jr. 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
8:00Score: 8.8/10
Waves: 0.48m (4.7s), Wind: 3.8 m/s
Best Night
4:00Score: 8.5/10
Waves: 0.52m, Wind: 1.8 m/s
Seasonal Analysis for Crater Jr.Alpha
Historical patterns and best seasons for diving at Crater Jr.
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 Crater Jr.
Winter
Avg. Score: 8.8/10
Winter offers the best overall diving conditions with calmer seas and better visibility, despite cooler temperatures.
Best Months for Crater Jr.
February
Score: 8.9
December
Score: 8.8
January
Score: 8.7
Ideal Conditions for Crater Jr.
Water Temp
26.5°C / 79.7°F
September
Visibility
11.3m / 37.1ft
November
Wave Height
2.2m / 7.2ft
November
Wave Period
8.0s
January
Seasonal Insights for Crater Jr.
Crater Jr. shows typical northern hemisphere patterns with July being the warmest month (28.3°C) and January the coldest (18.0°C). The calmest conditions typically occur in November with average wave heights of 2.2m and wave periods of 8.0s. The most comfortable wave conditions are in November 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). February is usually the driest month with 0.1mm of precipitation. For beginners, the best time to visit would be during November to January, 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 - May 29, 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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