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Double Reef

The Northern dive site in Guam, United States, offers divers and snorkelers a remarkable underwater experience. This dive site features a vibrant coral reef with depths ranging from 10 to 70 feet, providing ample opportunities to explore its enchanting marine life. The waters are clear, offering a visibility of 22 meters, allowing divers to fully admire the astonishing coral formations and witness the abundant school of fish that call this reef their home. Accessible only by boat, this dive site ensures a peaceful and undisturbed diving experience.

With a maximum depth of 20 meters, this dive site is suitable for both beginner and advanced divers. The calm winds and seas during the summer months make it an ideal time to explore this breathtaking underwater wonderland. Additionally, the Northern dive site is located near Finegayan Station in Dededo, offering convenience and accessibility to divers.

Every morning, lucky divers may encounter Spinner Dolphins in the area, adding an extra touch of magic to their dive. Pelagic species are also known to pass through these waters, further enhancing the diversity of marine life that can be admired.

For an unforgettable diving adventure, head to the Northern dive site in Guam, United States. Immerse yourself in crystal-clear waters, mesmerizing coral formations, and a world teeming with marine wonders. Whether you're a beginner or an experienced diver, this easily accessible dive site promises a memorable underwater journey.

Diving Conditions Score for Double Reef

6.9
Above Average

Decent conditions, proceed with caution.
The score is based on a calculation of the current weather and sea conditions.

Dive Site Overview for Double Reef

Depth

20m

Visibility

22m

Experience Level

beginner
advanced

Weather Conditions for Double Reef

Wave Height

0.82m

Wind Speed

12.6 m/s

Water Temp

29.8°C

Visibility

8.92km

Cloud Cover

23%

Wave Period

7.5s

Air Temperature

26.3°C

Precipitation

0 mm

Detailed 7-Day Diving Forecast for Double Reef
Alpha

Dive Score Chart for Double Reef

Best time to dive: 17:00 with score 8.489531567328918/10. Water conditions: Waves 0.8m, Wind 2.4 m/s.Best night dive time: 18:00 with score 7.820531567328918/10.

Chart showing hourly dive conditions including wave height, wind speed, water temperature, and visibility throughout the day.

Sunrise at Double Reef: 06:00
Sunset at Double Reef: 18:00

Optimal diving conditions at Double 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
17:00

Score: 8.5/10
Waves: 0.8m (7.55s), Wind: 2.4 m/s

🌙
Best Night
18:00

Score: 7.8/10
Waves: 0.8m, Wind: 4 m/s

Seasonal Analysis for Double Reef
Alpha

Historical patterns and best seasons for diving at Double 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 Double Reef

Winter

Avg. Score: 10.0/10

Winter offers the best overall diving conditions with calmer seas and better visibility, despite cooler temperatures.

Best Months for Double Reef

January
Score: 10.0
February
Score: 10.0
March
Score: 10.0

Ideal Conditions for Double Reef

Water Temp

Thermometer Emoji

21.4°C / 70.5°F

June

Visibility

Telescope Emoji

20.1m / 65.9ft

May

Wave Height

Wave Emoji

0.2m / 0.7ft

January

Wave Period

Wave Emoji

8.0s

January

Seasonal Insights for Double Reef

Double Reef shows typical northern hemisphere patterns with June being the warmest month (21.4°C) and December the coldest (17.4°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.

Scoring Legend:
9-10 (Excellent)
7-8 (Good)
5-6 (Average)
3-4 (Poor)
1-2 (Dangerous)

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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