How deep is Hap's Reef?

Hap's Reef ranges from 6.1 to 19.8 metres deep (20–65 feet). It is a saltwater site. Depths vary across the site, so plan your profile to your training and verify conditions locally.

Is Hap's Reef a shore dive or a boat dive?

Hap's Reef is a boat dive — access is by boat rather than from shore. The entry area is recorded as sheltered from surge. No facilities are recorded at the site, and cell service is recorded as good. Entry details and parking notes, where known, are listed in the access section of this page.

When is the best time to dive Hap's Reef?

Good as a calm-weather boat reef or second dive after deeper sites; verify sea state with operator. Conditions vary, so check the latest reports and forecasts on the dive site page before your trip.

What will I see at Hap's Reef?

Divers at Hap's Reef in United States commonly report sightings of small reef fish, anemones, Octopus, Lionfish, and Pufferfish. Small reef fish and anemones are recorded as common sightings, while Octopus, Lionfish, and Pufferfish are reported only occasionally. Marine life varies by season and conditions—check the site page for recent diver observations and photos.

What hazards are recorded at Hap's Reef?

Boat traffic, mild current, lionfish, fragile coral, and navigation around sand flats if separated from the group. Hazards and conditions change, so verify current local information before diving.

Add the first photo

Boat entry

Hap's Reef

Guam, United States

Open Water suggested6–20 m (20–65 ft) 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 small reef fish, anemones, and Octopus. Recent reports put the water around 29°C (84°F). Check the latest conditions and entry details before you go.

Next window today· 7:00–18:00 · favorable · sunset 17:56

Forecast for this hour · 6:00 · run 15 h ago

1.0 m (3.4 ft)waves — about a meter expected (waves — about three feet expected)

Tap a factor for its source and model point · Forecast 29°C · seasonal avg 30°C ( · Forecast 84°F · seasonal avg 86°F)

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

Smallest waves: Wed

Tue

1.0 m waves · 4 kn wind (3.3 ft waves · 4 kn wind)

Wed

0.8 m waves · 4 kn wind (2.7 ft waves · 4 kn wind)

Thu

0.9 m waves · 8 kn wind (2.8 ft waves · 8 kn wind)

Fri

1.3 m waves · 10 kn wind (4.1 ft waves · 10 kn wind)

Sat

2.0 m waves · 9 kn wind (6.5 ft waves · 9 kn wind)

Sun

1.8 m waves · 4 kn wind (5.8 ft waves · 4 kn wind)

Mon

Favorable windowModerate window— no window

Every forecast dive window each day, site-local time, from wave and wind forecasts. Numbers under each bar are daylight averages.

First light 5:52 · Sunrise 6:14 · Sunset 17:56 · some windows run past sunset

Source: Open-Meteo marine · model point 1.2 km from site · updated 26 Oct, 15:22 GMT+10

Forecast only — always assess conditions on site.

Compare this weekend’s windows near Hap's Reef

Forecast · NOAA tide model

Tide & slack timing

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.

Dived here today — did the forecast match?

What Divers Say

Known for: small reef fish, anemones, Butterflyfish

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.

January, 11% of days have historically been favorable, water has typically been 29°C (84°F), waves have typically been 2.2 m (7.3 ft), wind has typically been 19 knots
February, 1% of days have historically been favorable, water has typically been 28°C (83°F), waves have typically been 2.2 m (7.3 ft), wind has typically been 20 knots
March, 32% of days have historically been favorable, water has typically been 28°C (83°F), waves have typically been 1.9 m (6.1 ft), wind has typically been 17 knots
April, 54% of days have historically been favorable, water has typically been 29°C (83°F), waves have typically been 1.5 m (4.9 ft), wind has typically been 16 knots
May, 73% of days have historically been favorable, water has typically been 29°C (84°F), waves have typically been 1.5 m (4.8 ft), wind has typically been 16 knots
June, 87% of days have historically been favorable, water has typically been 30°C (85°F), waves have typically been 1.1 m (3.6 ft), wind has typically been 14 knots, historically most favorable
July, 78% of days have historically been favorable, water has typically been 30°C (86°F), waves have typically been 1.3 m (4.2 ft), wind has typically been 15 knots
August, 71% of days have historically been favorable, water has typically been 30°C (86°F), waves have typically been 1.3 m (4.2 ft), wind has typically been 13 knots
September, 73% of days have historically been favorable, water has typically been 30°C (86°F), waves have typically been 1.4 m (4.5 ft), wind has typically been 15 knots
October, 55% of days have historically been favorable, water has typically been 30°C (86°F), waves have typically been 1.6 m (5.2 ft), wind has typically been 15 knots
November, 22% of days have historically been favorable, water has typically been 29°C (85°F), waves have typically been 1.8 m (5.8 ft), wind has typically been 18 knots
December, 10% of days have historically been favorable, water has typically been 29°C (84°F), waves have typically been 2.0 m (6.5 ft), wind has typically been 18 knots

June has typically 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

Rough labels: “Commonly seen” usually means two or more recorded sightings near this site in public dive logs (GBIF), “Occasionally seen” one; “Seasonal” and “Rarely seen” come from dive-guide research. Not a measured rate.

Fills & rentals nearby

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

MDA (Piti Shop)13 km (7.8 mi)
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Shop facts come from OpenStreetMap and community corrections, shown nearest first. PickADive lists facts and contacts only — no listing is sponsored or ranked.

Data updated July 2026

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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