San Juan Reef
Located in the northern region, this dive site is best explored as a second dive following Barracuda or Cantrel. It offers a captivating underwater experience, characterized by the presence of majestic finger corals, lettuce coral, and vibrant sand sponges.
Diving enthusiasts will also encounter fascinating ledges and overhangs teeming with French grunts and schoolmasters. As you navigate along the reef, prepare to be amazed by the mesmerizing sight of thousands of damselfish darting among the red seaweed.
With a remarkable visibility of 25m and a maximum depth of 19m, this dive site is ideal for advanced and expert divers. It is situated in Mexico, specifically in the vicinity of San Miguel de Cozumel, Cozumel, Quintana Roo, 77622.
Diving enthusiasts will also encounter fascinating ledges and overhangs teeming with French grunts and schoolmasters. As you navigate along the reef, prepare to be amazed by the mesmerizing sight of thousands of damselfish darting among the red seaweed.
With a remarkable visibility of 25m and a maximum depth of 19m, this dive site is ideal for advanced and expert divers. It is situated in Mexico, specifically in the vicinity of San Miguel de Cozumel, Cozumel, Quintana Roo, 77622.
Diving Conditions Score for San Juan Reef
7.5
GoodGood diving conditions!
The score is based on a calculation of the current weather and sea conditions.
Dive Site Overview for San Juan Reef
Depth
19m
Visibility
25m
Experience Level
advanced
expert
Weather Conditions for San Juan Reef
Wave Height
0.74m
Wind Speed
16.3 m/s
Water Temp
28.8°C
Visibility
30.02km
Cloud Cover
27%
Wave Period
5.5s
Air Temperature
28.2°C
Precipitation
0 mm
Detailed 7-Day Diving Forecast for San Juan Reef
Alpha
Dive Score Chart for San Juan Reef
Best time to dive: 13:00 with score 7.223566055045872/10. Water conditions: Waves 0.72m, Wind 17.6 m/s.Best night dive time: 23:00 with score 6.987400000000001/10.
Chart showing hourly dive conditions including wave height, wind speed, water temperature, and visibility throughout the day.
Sunrise at San Juan Reef: 06:00
Sunset at San Juan Reef: 18:00
Optimal diving conditions at San Juan Reef 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
13:00Score: 7.2/10
Waves: 0.72m (5.45s), Wind: 17.6 m/s
Best Night
23:00Score: 7.0/10
Waves: 0.54m, Wind: 15.4 m/s
Seasonal Analysis for San Juan ReefAlpha
Historical patterns and best seasons for diving at San Juan Reef
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 San Juan Reef
Winter
Avg. Score: 9.4/10
Winter offers the best overall diving conditions with calmer seas and better visibility, despite cooler temperatures.
Best Months for San Juan Reef
November
Score: 9.5
January
Score: 9.4
February
Score: 9.4
Ideal Conditions for San Juan Reef
Water Temp
27.1°C / 80.8°F
June
Visibility
14.1m / 46.3ft
November
Wave Height
1.3m / 4.3ft
November
Wave Period
8.0s
January
Seasonal Insights for San Juan Reef
San Juan Reef shows typical northern hemisphere patterns with July being the warmest month (28.1°C) and January the coldest (20.3°C). The calmest conditions typically occur in November with average wave heights of 1.3m 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). April is usually the driest month with 0.6mm 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 - Jun 13, 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.
50 Dive sites near San Juan Reef in
Cenote Kukulkan
Cenote Tajma Ha
Cenote Cristalino
Cenote El Pit
Playa del Carmen
Pargo Cave
Chun Zumbul
Cenote Taak Bi Ha
Cerebros
Jardines
Cenote Dos Ojos
Barracuda
Cenote Tak Be Lum
Chun Zumbul Deep
Moc Che Deep
Mama Viña (Wreck)
Tortugas Reef
Cenote Nicte Ha
Bahia Príncipe
Cenote Dream Gate
Casa Cenote
Agua Negra Cozumel
San Juan Reef
Cantarel
La Palomita
Palace Reef
Villablanca
Tikila Beach
Julio Kin Scuba shore dive
Paraiso Reef
Tormentos
Felipe Xicotencatl C-53 (Wreck)
Chankanaab Bolones
Chankanaab
Punta Tunich
Yucab Reef
San Francisco Reef
Casa Blanca
Santa Rosa Wall
Santa Rosa Shallows
Cedar Pass
Dalila
Palancar Horseshoe
Palancar Caves
Cozumel
Palancar Gardens
Palancar Bricks
Columbia Shallows
Columbia Reef
Punta Sur - Devil’s Throat
Got feedback?
Help us improve this dive site by giving us feedback.