Port Authority of Guam beach (Apra Harbor), not Naval Base: swimming and fishing need no permit, but diving requires a Port Authority beach permit (ID + original permit on site). Taken from the PAG permit documents and Guam PDN reporting via search index; the PAG PDFs could not be fetched directly from the box. Medium confidence; recheck.
Source: portofguam.com, guampdn.com. Checked Oct 5, 2026
Permit or reservation needed · Last confirmed Oct 5, 2026
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57 sourced words
As of Wed, Oct 28, 2:08 PM GMT+10 at Outhouse Beach: water temperature 86.4°F30.2°C, measured by NOAA CO-OPS Tides and Currents 1630000 1.4 mi2.3 km away; wind 4 mph7 km/h; waves 2.7 ft0.8 m (Modeled). Dive score 100 of 100, Favorable conditions.
Favorable conditions
100 out of 100
55% of inputs used
Water temperature
86.4°F30.2°C
Air temperature
87.8°F31°C
Estimated range: Not enough data
No active NWS alerts for this point
Marine zone PMZ151: Guam Coastal Waters
Wed 2 PM
86°F30°C
Wind 3 mph5 km/h
9% rain
Wed 5 PM
86°F30°C
Wind 3 mph5 km/h
9% rain
Wed 8 PM
84.2°F29°C
Wind 3 mph5 km/h
19% rain
Wed 11 PM
84.2°F29°C
Wind 3 mph5 km/h
19% rain
Thu 2 AM
84.2°F29°C
Wind 3 mph5 km/h
19% rain
Thu 5 AM
84.2°F29°C
Wind 6 mph10 km/h
19% rain
Thu 8 AM
84.2°F
Each day uses the same readings as the score above, with that morning’s forecast. Forecast: National Weather Service.
Three-day trend: steady
Wed, Oct 28
100 · Favorable conditions
Wind 3 mph · Rain 19%
Thu, Oct 29
100 · Favorable conditions
Wind 12 mph · Rain 19%
Fri, Oct 30
100 · Favorable conditions
Wind 16 mph · Rain 8%
Sat, Oct 31
100 · Favorable conditions
Wind 12 mph · Rain 8%
Sun, Nov 1
100 · Favorable conditions
Wind 6 mph · Rain 18%
Mon, Nov 2
100 · Favorable conditions
Wind 9 mph · Rain 18%
Tue, Nov 3
100 · Favorable conditions
Wind 9 mph · Rain 18%
Not confirmed yet. A best-months line is shown only when a source states one.
Low tide
Wed, Oct 28, 2:56 PM GMT+10
1.39 ft0.42 m MLLW
High tide
Wed, Oct 28, 7:58 PM GMT+10
2.39 ft0.73 m MLLW
Low tide
Thu, Oct 29, 3:16 AM GMT+10
-0.74 ft-0.23 m MLLW
High tide
Thu, Oct 29, 10:33 AM GMT+10
2.35 ft0.72 m MLLW
Predicted Predictions for Apra Harbor, Guam, 1.4 mi2.3 km away
Times shown in the site's local time (Chamorro Standard Time)
Conditions are informational, not a dive plan. Check with the site or operator, dive within your training, and make your own go/no-go decision.
Reported by divers, not measured by sensors. Reports from the last 14 days can nudge clarity, and they stay labeled as diver-reported.
Nobody has filed a report here yet. The sensors stay in charge until a diver does.
Conditions are informational, not a dive plan. Check with the site or operator, dive within your training, and make your own go/no-go decision.
The images show the current score and readings with their sources and times.
Wind
4 mph7 km/h
Gusts
6 mph10 km/h
Wave height
2.7 ft0.8 m
typical error ±0.55 fttypical error ±0.17 m
Wave period
8 sec8 sec
Current
0.6 mph0.9 km/h
Wind 9 mph15 km/h
19% rain
Thu 11 AM
84.2°F29°C
Wind 12 mph20 km/h
19% rain
Forecast (NWS) Forecast from NOAA National Weather Service
