Kuminatu Surf Forecast and Surf Reports

(Chiba, Japan)

Forecast
- Hourly Forecast
- 16 Day Forecast
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Weather State
Spot Information

Kuminatu Surf Guide

Kuminatu in Kanagawa and Chiba is an exposed beach break that has inconsistent surf The best wind direction is from the north northwest. Most of the surf comes fis in the form of windswells and the ideal wave direction is from the southeast. The beach breaks offer lefts and rights. When it's working here, it can get crowded. The water quality here is rather suspect.

Kuminatu Spot Info

Type:	Rating:	Reliability:	Todays Sea Temp*:
Beach	3	inconsistent	19.1°C*ocean temperature recorded from satellite

Surfing Kuminatu:

The best conditions reported for surf at Kuminatu occur when a Southeast swell combines with an offshore wind direction from the North-northwest.

Hourly Forecast

16 Day Forecast

What's the best time of year to surf Kuminatu (for consistent clean waves)?

octoberBest Season: autumn

The best time of year for surfing Kuminatu with consistent clean waves (rideable swell with light / offshore winds) is during Autumn and most often the month of October. Clean surfable waves are typically found 39% of the time in October while 46% of the time it tends to be blown out. For the remaining 15% of the time it is considered too small by most surfers but may still be OK for beginners and groms at times.

clean

39%

Surfable waves that hold up well for longer rides in prevailing cross-offshore, offshore or light wind conditions.

blown out

46%

Surfable sized waves that are of poorer quality due to prevailing onshore, cross-onshore or windy conditions (may be preferable for kitesurfing).

too small

15%

Waves usually considered too small for good surf. Some wave-magnet breaks may still work though if conditions are right (on occasion).

Explore Kuminatu Location Map

Interactive Kuminatu surf break location map. View information about nearby surf breaks, their wave consistency and rating compared to other spots in the region. Current swell conditions from local buoys are shown along with live wind speed and direction from nearby weather stations. Click icons on the map for more detail. The closest passenger airport to Kuminatu is Tokyo International Airport (HND) in Japan, 63 km (39 miles) away (directly). The second nearest airport to Kuminatu is New Tokyo International Airport (NRT), also in Japan, 73 km (45 miles) away.

Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)
Wind Speed (km/h)

Please note that some surf spot locations are approximate to protect their exact location while others are not shown at close zoom level.

Kuminatu Surf Forecasts:

Hourly Forecast

16 Day Forecast

Todays Surf Summary
Wednesday, 6 May 2026, 02:22 Local Time

m, °C	Wednesday 06
ft, °F	0AM	3AM	6AM	9AM
Wave (m)	ESE	ESE	ESE	ESE
Period (s)	10	9	9	9
Wind (km/h)
Wind State	on	cross- on	on	on

Tides at Kuminatu

Current tide and informaton

For Kazusa Katuura, Tiba, Japan, 1 km from Kuminatu.

Next High Water: 05:46am | 1.29m

Next Low Water: 01:02pm | 0.08m

NEXT	IS AT (local time)	remaining
high tide
low tide

Kuminatu Sea Temperature

The water temperature (19.1 °C) at Kuminatu is relatively warm. If the sun does come out as forecast, it should feel warm enough to surf in a summer wetsuit. Effective air temperature of 18.0 °C.

Today, many surfers would wear a summer wetsuit.

Current Temp*: 19.1°C*ocean temperature recorded from satellite