Gun Beach
Within the Tumon Marine Reserve, divers will be thrilled by the diversity and plentifulness of fish species. The coral reef encompassing this area is adorned with both hard and soft corals, as well as numerous sea anemones, creating a truly captivating underwater landscape.
It is important to note that diving from shore during high surf conditions is not advisable. For optimal safety and enjoyment, it is recommended to embark on a boat drift for this particular dive site.
Experience excellent visibility of up to 15 meters and explore depths of up to 20 meters at North Tumon Bay. Whether you are a beginner or an advanced diver, this site caters to divers of all levels.
Located in the United States, this picturesque dive spot is conveniently close to The Beach Bar & Grill, situated on Gun Beach Road in Tamuning, Guam, 96912, United States.
Diving Conditions Score for Gun Beach
Very good diving conditions!
The score is based on a calculation of the current weather and sea conditions.
Dive Site Overview for Gun Beach
Depth
20m
Visibility
15m
Experience Level
Weather Conditions for Gun Beach
Wave Height
2.52m
Wind Speed
4.6 m/s
Water Temp
28.9°C
Visibility
52.04km
Cloud Cover
40%
Wave Period
12.3s
Air Temperature
26.8°C
Precipitation
0 mm
Dive Score Chart for Gun Beach
Best time to dive: 16:00 with score 7.207466666666667/10. Water conditions: Waves 2.5m, Wind 3.6 m/s.Best night dive time: 18:00 with score 6.2373/10.
Chart showing hourly dive conditions including wave height, wind speed, water temperature, and visibility throughout the day.
Optimal diving conditions at Gun Beach 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.
Score: 7.2/10
Waves: 2.5m (12.3s), Wind: 3.6 m/s
Score: 6.2/10
Waves: 2.4m, Wind: 7.2 m/s
Seasonal Analysis for Gun BeachAlpha
Historical patterns and best seasons for diving at Gun Beach
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 Gun Beach
Winter
Winter offers the best overall diving conditions with calmer seas and better visibility, despite cooler temperatures.
Best Months for Gun Beach
Ideal Conditions for Gun Beach
Water Temp
27.2°C / 81.0°F
May
Visibility
11.7m / 38.4ft
November
Wave Height
1.4m / 4.6ft
September
Wave Period
8.0s
January
Seasonal Insights for Gun Beach
Gun Beach shows typical northern hemisphere patterns with June being the warmest month (27.3°C) and January the coldest (22.3°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 1.2mm 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 - Jul 9, 2026