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Boat entry

Hap's Reef

Guam, United States
Open Water suggested6–20 m depthBoat entryRash guard or 2mm shorty typical

Boat dive — see Entry & access.

Hap's Reef at a glance

Hap's Reef is a boat dive site in Guam, United States with depths of 6.1–19.8 m (20–65 ft). Typically most favorable Jun · from 3 years of archive data. Divers commonly see anemones, butterflyfish, and lionfish. Recent reports put the water around 30°C (85°F). Check the latest conditions and entry details before you go.

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

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

Site hazards: Boat traffic, mild current, lionfish, fragile coral, and navigation around sand flats if separated from the group.

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 5:42 · Sunrise 6:05 · Sunset 18:50

Source: Open-Meteo marine · model point 1.2 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: anemones, butterflyfish, small reef fish
Best time: Good as a calm-weather boat reef or second dive after deeper sites; verify sea state with operator.

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. Jan11%29°C2.2 m
  2. Feb1%28°C2.2 m
  3. Mar32%28°C1.9 m
  4. Apr54%29°C1.5 m
  5. May73%29°C1.5 m
  6. Jun87%30°C1.1 m
  7. Jul78%30°C1.3 m
  8. Aug71%30°C1.3 m
  9. Sep73%30°C1.4 m
  10. Oct55%30°C1.6 m
  11. Nov22%29°C1.8 m
  12. Dec10%29°C2.0 m

June 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

  • anemonesCommonly seen
  • butterflyfishCommonly seen
  • lionfishOccasionally seen
  • octopusOccasionally seen
  • pufferfishOccasionally seen
  • small 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

Boat-access coral mound in Agat Bay, often used as a mellow reef dive or second dive after deeper southern/Orote sites. The mound rises from surrounding sand and mixed reef to a shallower crest, creating an easy profile with good small reef-fish life.

boatreef

Boat traffic, mild current, lionfish, fragile coral, and navigation around sand flats if separated from the group.

Reviews

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