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Gun Beach

North Tumon Bay is a highly sought-after destination for both beach and boat divers. Situated within the Tumon Marine Preserve, this site boasts an impressive array of thriving coral and an abundance of colorful fish. Divers can also spot several majestic turtles and witness the graceful presence of mantas. With depths ranging from 3 to 10 meters, this location offers an ideal diving experience for divers of various skill levels.

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

8.1
Very Good

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

beginner
advanced

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

Detailed 7-Day Diving Forecast for Gun Beach
Alpha

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.

Sunrise at Gun Beach: 06:00
Sunset at Gun Beach: 18:00

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.

🌞
Best Overall
16:00

Score: 7.2/10
Waves: 2.5m (12.3s), Wind: 3.6 m/s

🌙
Best Night
18:00

Score: 6.2/10
Waves: 2.4m, Wind: 7.2 m/s

Seasonal Analysis for Gun Beach
Alpha

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

Avg. Score: 9.4/10

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

Best Months for Gun Beach

January
Score: 9.4
February
Score: 9.4
November
Score: 9.4

Ideal Conditions for Gun Beach

Water Temp

Thermometer Emoji

27.2°C / 81.0°F

May

Visibility

Telescope Emoji

11.7m / 38.4ft

November

Wave Height

Wave Emoji

1.4m / 4.6ft

September

Wave Period

Wave Emoji

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.

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

Last updated: 1 min. ago - Jul 9, 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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