Kugenuma Rivermouth Surf Forecast and Surf Reports

(Kanagawa, Japan)

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- Hourly Forecast
- 16 Day Forecast
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Spot Information

Kugenuma Rivermouth Surf Guide

Kugenuma Rivermouth in Kanagawa is an exposed river break that has fairly consistent surf. The best time of year for waves is autumn. Works best in offshore winds from the north northeast and there is no shelter here from cross shore breezes. Waves more likely to be from local windswells than distant groundswells and the ideal wave angle is from the south. Prevailing left breaking waves at the river break. Surfable at all stages of the tide. It's often crowded here. Overcrowding can even make surfing hazardous.

Kugenuma Rivermouth Spot Info

Type:	Rating:	Reliability:	Todays Sea Temp*:
River	2	fairly consistent	19.5°C*ocean temperature recorded from satellite

Surfing Kugenuma Rivermouth:

The best conditions reported for surf at Kugenuma Rivermouth occur when a South swell combines with an offshore wind direction from the North-northeast.

Hourly Forecast

16 Day Forecast

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

octoberBest Season: autumn

The best time of year for surfing Kugenuma Rivermouth 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 11% of the time in October while 12% of the time it tends to be blown out. For the remaining 77% of the time it is considered too small by most surfers but may still be OK for beginners and groms at times.

clean

11%

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

blown out

12%

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

too small

77%

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

Explore Kugenuma Rivermouth Location Map

Interactive Kugenuma Rivermouth 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.

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.

Kugenuma Rivermouth Surf Forecasts:

Hourly Forecast

16 Day Forecast

Todays Surf Summary
Tuesday, 5 May 2026, 20:04 Local Time

m, °C	Tue		Wed
ft, °F	6PM	9PM	0AM	3AM
Wave (m)	S	SSE	SSE	SSE
Period (s)	7	7	7	6
Wind (km/h)
Wind State	cross- on	on	cross- on	on

What does Kugenuma Rivermouth look like?

Latest photos from Kugenuma Rivermouth. Upload your own or view all photos on the gallery page.

Credit: Leon Barrios

Tides at Kugenuma Rivermouth

Current tide and informaton

For E No Sima, Kanagawa, Japan, 2 km from Kugenuma Rivermouth.

Next High Water: 05:59am | 1.4m

Next Low Water: 12:17am | 0.93m

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

Kugenuma Rivermouth Sea Temperature

The water temperature (19.5 °C) at Kugenuma Rivermouth 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 16.0 °C.

Today, many surfers would wear a summer wetsuit.

Current Temp*: 19.5°C*ocean temperature recorded from satellite