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IntermediateBoth

Gun Beach

Guam, United States
Open Water suggested2–31 m depthBoth entryRash guard or 2mm shorty typical

Gun Beach at a glance

Gun Beach is a intermediate both dive site in Guam, United States with depths of 1.5–30.5 m (5–100 ft). Typically most favorable Aug · from 3 years of archive data. Divers commonly see giant clams, green sea turtles, and hard coral. Recent reports put the water around 30°C (86°F). Check the latest conditions and entry details before you go.

Marine model · graded 4h ago
0.7 mwaves — under a meter expected

Tap a factor for its source and model point · Forecast 30°C · seasonal avg 30°C

Site hazards: Outgoing rip/current through the channel, shallow sharp reef, coral contact, boat traffic, possible surf/surge, lionfish/fire coral, and navigation issues on the return.

Read the full hazards ↓

Dive windows this week

Best: Tue
Sun—
Mon7:00–19:00
Tue7:00–19:00
Wed7:00–19:00
Thu7:00–19:00
Fri7:00–19:00
Sat7:00–19:00

Favorable windowModerate window— no window

First light 5:41 · Sunrise 6:04 · Sunset 18:50

Source: Open-Meteo marine · model point 2.7 km from site · graded 4h ago

Forecast only — always assess conditions on site.

Forecast · NOAA tide model

Tide & slack timing

Loading tide predictions

Recent diver reports

Dated firsthand observations from divers — not current conditions.

No diver reports for this site yet. — one dated observation helps every diver after you.

What Divers Say

Known for: hard coral, tropical reef fish
Best time: Plan for calm surf and favorable tide/current, commonly incoming or slack for easier exit. Avoid strong outgoing tide until familiar with the site.

Based on community reviews and site data. Conditions vary — always verify before diving.

Best months, historically

What conditions have historically been typical at this site, month by month — not a forecast.

  1. Jan15%29°C2.1 m
  2. Feb5%28°C2.2 m
  3. Mar32%28°C1.9 m
  4. Apr41%29°C1.7 m
  5. May72%29°C1.6 m
  6. Jun80%29°C1.3 m
  7. Jul83%30°C1.3 m
  8. Aug91%30°C1.2 m
  9. Sep88%30°C1.3 m
  10. Oct75%30°C1.5 m
  11. Nov38%29°C1.9 m
  12. Dec9%29°C2.1 m

August hastypically had the largest share of favorable days here. Conditions vary year to year — this is historical context, not a forecast.

Based on 3 years of archive data. Bar height shows the share of days each month whose conditions have historically scored favorably.

Marine life seen at this site

Species noted at this site — not a promise of what you’ll encounter.

Species seen here

  • giant clamsOccasionally seen
  • green sea turtlesOccasionally seen
  • hard coralCommonly seen
  • octopusOccasionally seen
  • pipefishOccasionally seen
  • raysOccasionally seen
  • tropical reef fishCommonly seen

Fills & rentals nearby

Facts from OpenStreetMap, corrected by the community — listed by distance only. Details change; confirm with the shop.

Shop facts come from OpenStreetMap and community corrections, shown nearest first. PickADive lists facts and contacts only — no listing is sponsored or ranked.

Site details

North Tumon Bay shore reef with a known cable/pipe channel through the shallow reef flat. It can be snorkeled or dived from shore, and boats may also use the area. The best diving is on the healthy coral side once past the reef flat; the return through the channel/current is the key skill.

boatreefshore

Outgoing rip/current through the channel, shallow sharp reef, coral contact, boat traffic, possible surf/surge, lionfish/fire coral, and navigation issues on the return.

Reviews

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