Hap’s Reef
Explore Agat Bay, an incredible dive site in the crystal-clear waters off Guam, United States. With a visibility of up to 16 meters, this dive spot is perfect for both beginner and advanced divers. Offering depths ranging from 25 to 65 feet, Agat Bay is an exceptional destination to immerse yourself in the vibrant marine life.
Discover the mesmerizing reef flat, teeming with thousands of fish and stretching up to 20 to 30 feet. As you explore the surrounding reef and sand flats at depths of 40 to 65 feet, keep an eye out for the fascinating Banded Sole. This intriguing fish gracefully glides along the sea bottom, resembling the movements of a large Nudibranch.
Dive into Agat Bay - a diver's paradise with great visibility and an abundance of marine life. Whether you are a beginner or an experienced diver, this captivating site offers an unforgettable experience. Start your underwater adventure in Guam and make your way to this remarkable location.
Discover the mesmerizing reef flat, teeming with thousands of fish and stretching up to 20 to 30 feet. As you explore the surrounding reef and sand flats at depths of 40 to 65 feet, keep an eye out for the fascinating Banded Sole. This intriguing fish gracefully glides along the sea bottom, resembling the movements of a large Nudibranch.
Dive into Agat Bay - a diver's paradise with great visibility and an abundance of marine life. Whether you are a beginner or an experienced diver, this captivating site offers an unforgettable experience. Start your underwater adventure in Guam and make your way to this remarkable location.
Diving Conditions Score for Hap’s Reef
5.8
AverageAverage conditions, be alert.
The score is based on a calculation of the current weather and sea conditions.
Dive Site Overview for Hap’s Reef
Depth
15m
Visibility
16m
Experience Level
beginner
advanced
Weather Conditions for Hap’s Reef
Wave Height
1m
Wind Speed
22.7 m/s
Water Temp
29.5°C
Visibility
7.84km
Cloud Cover
72%
Wave Period
6.05s
Air Temperature
31.2°C
Precipitation
0.2 mm
Detailed 7-Day Diving Forecast for Hap’s Reef
Alpha
Dive Score Chart for Hap’s Reef
Best time to dive: 17:00 with score 7.145148484848485/10. Water conditions: Waves 0.84m, Wind 7.3 m/s.Best night dive time: 20:00 with score 6.9397796019900495/10.
Chart showing hourly dive conditions including wave height, wind speed, water temperature, and visibility throughout the day.
Sunrise at Hap’s Reef: 06:00
Sunset at Hap’s Reef: 18:00
Optimal diving conditions at Hap’s 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
17:00Score: 7.1/10
Waves: 0.84m (6.6s), Wind: 7.3 m/s
Best Night
20:00Score: 6.9/10
Waves: 0.82m, Wind: 5.4 m/s
Seasonal Analysis for Hap’s ReefAlpha
Historical patterns and best seasons for diving at Hap’s 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 Hap’s 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 Hap’s Reef
January
Score: 9.5
February
Score: 9.4
November
Score: 9.4
Ideal Conditions for Hap’s Reef
Water Temp
27.6°C / 81.7°F
May
Visibility
11.2m / 36.7ft
November
Wave Height
1.4m / 4.6ft
September
Wave Period
8.0s
January
Seasonal Insights for Hap’s Reef
Hap’s Reef shows typical northern hemisphere patterns with May being the warmest month (27.6°C) and January the coldest (22.7°C). The calmest conditions typically occur in September with average wave heights of 1.4m and wave periods of 8.0s. The most comfortable wave conditions are in September 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 1.0mm of precipitation. For beginners, the best time to visit would be during September to November, 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 20, 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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