Submarine Base

East New Britain (Rabaul), Papua New GuineaDirections

Rash guard or 2mm shorty typical

Submarine Base at a glance

Submarine Base is a dive site in East New Britain (Rabaul), Papua New Guinea. Typically most favorable Oct · from 3 years of archive data. Recent reports put the water around 28°C (83°F). Check the latest conditions and entry details before you go.

Favorable window now· until 18:00 · sunset 17:42

Forecast for this hour · 12:00 · run 20 h ago

0.3 m (0.9 ft)waves — under half a meter expected (waves — under a foot expected)

Tap a factor for its source and model point · Forecast 28°C · seasonal avg 31°C ( · Forecast 83°F · seasonal avg 87°F)

Dive windows this week

Lightest wind: Wed

Fri

0.3 m waves · 8 kn wind (1.0 ft waves · 8 kn wind)

Sat

0.3 m waves · 9 kn wind (0.9 ft waves · 9 kn wind)

Sun

0.2 m waves · 9 kn wind (0.8 ft waves · 9 kn wind)

Mon

0.3 m waves · 7 kn wind (0.8 ft waves · 7 kn wind)

Tue

0.4 m waves · 7 kn wind (1.2 ft waves · 7 kn wind)

Wed

0.3 m waves · 5 kn wind (1.1 ft waves · 5 kn wind)

Thu

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 5:07 · Sunrise 5:28 · Sunset 17:42 · some windows run past sunset

Source: Open-Meteo marine · model point 11 km from site · updated 22 Oct, 15:17 GMT+10

Forecast only — always assess conditions on site.

Compare this weekend’s windows near Submarine Base

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?

Best months, historically

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

January, 99% of days have historically been favorable, water has typically been 31°C (87°F), waves have typically been 0.6 m (1.8 ft), wind has typically been 11 knots
February, 91% of days have historically been favorable, water has typically been 30°C (87°F), waves have typically been 0.8 m (2.7 ft), wind has typically been 14 knots
March, 96% of days have historically been favorable, water has typically been 30°C (87°F), waves have typically been 0.6 m (2.0 ft), wind has typically been 12 knots
April, 99% of days have historically been favorable, water has typically been 30°C (87°F), waves have typically been 0.4 m (1.4 ft), wind has typically been 10 knots
May, 99% of days have historically been favorable, water has typically been 30°C (87°F), waves have typically been 0.5 m (1.5 ft), wind has typically been 12 knots
June, 97% of days have historically been favorable, water has typically been 30°C (87°F), waves have typically been 0.4 m (1.3 ft), wind has typically been 13 knots
July, 89% of days have historically been favorable, water has typically been 30°C (86°F), waves have typically been 0.5 m (1.7 ft), wind has typically been 15 knots
August, 84% of days have historically been favorable, water has typically been 30°C (86°F), waves have typically been 0.6 m (1.9 ft), wind has typically been 16 knots
September, 90% of days have historically been favorable, water has typically been 30°C (86°F), waves have typically been 0.5 m (1.7 ft), wind has typically been 15 knots
October, 100% of days have historically been favorable, water has typically been 31°C (87°F), waves have typically been 0.4 m (1.4 ft), wind has typically been 12 knots, historically most favorable
November, 98% of days have historically been favorable, water has typically been 31°C (87°F), waves have typically been 0.5 m (1.6 ft), wind has typically been 12 knots
December, 95% of days have historically been favorable, water has typically been 30°C (87°F), waves have typically been 0.6 m (1.9 ft), wind has typically been 11 knots

October 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 recorded at this site

No recorded sightings data for this site yet. Species lists appear as GBIF records and diver reports accumulate.

Fills & rentals nearby

No dive shops mapped within 25 km (16 mi). Know one? Add it to the map.

Data updated July 2026

Site details

No description for this site yet — divers who know it can suggest one below.

boatreefshorewall

No hazards recorded for this site yet — that never means there are none. Ask a local operator before you dive.

Reviews

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