Irizaki Hammerhead Point

Yonaguni, JapanDirections

Rash guard or 2mm shorty typical

Irizaki Hammerhead Point at a glance

Irizaki Hammerhead Point is a dive site in Yonaguni, Japan. Typically most favorable Sep · 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.

No window today· next: Thu 7:00–19:00 · favorable & moderate

Forecast for this hour · 4:00 · run 14 h ago

2.4 m (7.7 ft)waves — about two and a half meters expected (waves — about eight feet expected)

Tap a factor for its source and model point · Forecast 28°C · seasonal avg 29°C ( · Forecast 83°F · seasonal avg 84°F)

Dive windows this week

Lightest wind: Sun

Tue

2.3 m waves · 21 kn wind (7.5 ft waves · 21 kn wind)

Wed

3.0 m waves · 21 kn wind (9.7 ft waves · 21 kn wind)

Thu

1.6 m waves · 9 kn wind (5.3 ft waves · 9 kn wind)

Fri

1.2 m waves · 14 kn wind (3.9 ft waves · 14 kn wind)

Sat

1.3 m waves · 14 kn wind (4.3 ft waves · 14 kn wind)

Sun

0.9 m waves · 7 kn wind (3.0 ft waves · 7 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 6:28 · Sunrise 6:51 · Sunset 18:12 · some windows run past sunset

Source: Open-Meteo marine · model point 12 km from site · updated 26 Oct, 14:25 GMT+9

Forecast only — always assess conditions on site.

Compare this weekend’s windows near Irizaki Hammerhead Point

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, 18% of days have historically been favorable, water has typically been 24°C (75°F), waves have typically been 2.5 m (8.1 ft), wind has typically been 21 knots
February, 12% of days have historically been favorable, water has typically been 24°C (74°F), waves have typically been 2.4 m (7.9 ft), wind has typically been 21 knots
March, 30% of days have historically been favorable, water has typically been 24°C (75°F), waves have typically been 2.0 m (6.6 ft), wind has typically been 20 knots
April, 47% of days have historically been favorable, water has typically been 26°C (79°F), waves have typically been 1.6 m (5.2 ft), wind has typically been 18 knots
May, 56% of days have historically been favorable, water has typically been 27°C (81°F), waves have typically been 1.6 m (5.2 ft), wind has typically been 18 knots
June, 58% of days have historically been favorable, water has typically been 29°C (84°F), waves have typically been 1.4 m (4.5 ft), wind has typically been 17 knots
July, 49% of days have historically been favorable, water has typically been 30°C (86°F), waves have typically been 1.8 m (6.0 ft), wind has typically been 19 knots
August, 73% of days have historically been favorable, water has typically been 30°C (86°F), waves have typically been 1.3 m (4.3 ft), wind has typically been 13 knots
September, 76% of days have historically been favorable, water has typically been 30°C (86°F), waves have typically been 1.5 m (4.8 ft), wind has typically been 15 knots, historically most favorable
October, 34% of days have historically been favorable, water has typically been 29°C (84°F), waves have typically been 2.4 m (7.8 ft), wind has typically been 19 knots
November, 19% of days have historically been favorable, water has typically been 27°C (81°F), waves have typically been 2.5 m (8.3 ft), wind has typically been 22 knots
December, 13% of days have historically been favorable, water has typically been 26°C (78°F), waves have typically been 2.6 m (8.7 ft), wind has typically been 23 knots

September 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.

boatdriftpinnacle

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

Reviews

No reviews yet — this site is waiting for its first. Dived here? Your rating and a few lines help the next diver.

Spot something off?

Help keep this listing accurate for the next diver.