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Wannai

JapanDirections
3mm wetsuit typical

Wannai at a glance

Wannai is a dive site in Japan. Typically most favorable Jul · from 3 years of archive data. Recent reports put the water around 24°C (74°F). Check the latest conditions and entry details before you go.

Moderate window now· until 16:00

Forecast for this hour · 13:00 · run 10 h ago
0.9 m (3.0 ft)waves — under a meter expected (waves — about three feet expected)

Tap a factor for its source and model point · Forecast 24°C · seasonal avg 25°C ( · Forecast 74°F · seasonal avg 76°F)

Dive windows this week

Lightest wind: Fri
Mon6:00–16:00 moderate

1.0 m waves · 9 kn wind (3.3 ft waves · 9 kn wind)

Tue7:00–17:00 favorable

0.9 m waves · 4 kn wind (3.0 ft waves · 4 kn wind)

Wed7:00–17:00 favorable

0.7 m waves · 4 kn wind (2.4 ft waves · 4 kn wind)

Thu7:00–17:00 favorable

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

Fri7:00–17:00 favorable

0.2 m waves · 2 kn wind (0.7 ft waves · 2 kn wind)

Sat8:00–11:00 moderate, 11:00–16:00 favorable

0.8 m waves · 8 kn wind (2.6 ft waves · 8 kn wind)

Sun7:00–17:00 favorable

0.7 m waves · 5 kn wind (2.2 ft waves · 5 kn wind)

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 5:34 · Sunrise 6:00 · Sunset 16:57 · some windows run past sunset

Source: Open-Meteo marine · model point 1.8 km from site · updated 26 Oct, 02:24 GMT+9

Forecast only — always assess conditions on site.

Compare this weekend’s windows near Wannai

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.

  1. January, 80% of days have historically been favorable, water has typically been 17°C (63°F), waves have typically been 1.0 m (3.4 ft), wind has typically been 9 knots
  2. February, 78% of days have historically been favorable, water has typically been 17°C (62°F), waves have typically been 1.1 m (3.5 ft), wind has typically been 9 knots
  3. March, 78% of days have historically been favorable, water has typically been 17°C (62°F), waves have typically been 1.1 m (3.7 ft), wind has typically been 10 knots
  4. April, 87% of days have historically been favorable, water has typically been 18°C (64°F), waves have typically been 1.0 m (3.2 ft), wind has typically been 9 knots
  5. May, 84% of days have historically been favorable, water has typically been 19°C (66°F), waves have typically been 1.0 m (3.2 ft), wind has typically been 9 knots
  6. June, 91% of days have historically been favorable, water has typically been 21°C (71°F), waves have typically been 1.0 m (3.2 ft), wind has typically been 8 knots
  7. July, 94% of days have historically been favorable, water has typically been 24°C (76°F), waves have typically been 1.0 m (3.1 ft), wind has typically been 9 knots, historically most favorable
  8. August, 85% of days have historically been favorable, water has typically been 27°C (80°F), waves have typically been 0.9 m (3.1 ft), wind has typically been 8 knots
  9. September, 93% of days have historically been favorable, water has typically been 26°C (79°F), waves have typically been 0.9 m (2.8 ft), wind has typically been 9 knots
  10. October, 92% of days have historically been favorable, water has typically been 25°C (76°F), waves have typically been 0.8 m (2.6 ft), wind has typically been 8 knots
  11. November, 79% of days have historically been favorable, water has typically been 22°C (71°F), waves have typically been 0.9 m (3.1 ft), wind has typically been 9 knots
  12. December, 76% of days have historically been favorable, water has typically been 19°C (65°F), waves have typically been 1.1 m (3.5 ft), wind has typically been 10 knots

July 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

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.

Data updated July 2026

Site details

A dive site in Japan.

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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