Surf-Forecast | Kugenuma Rivermouth Surf Guide

Lat Long: 35.31° N 139.47° E

Issued: 8 pm 04 Nov 2026 (local time)

Forecast update in hr min

Today's Kugenuma Rivermouth sea temperature is

22.1°C

Kugenuma Rivermouth surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.

Photo by: Leon Barrios

Kugenuma Rivermouth Surf Guide

Kugenuma Rivermouth in Kanagawa is an exposed river break that has fairly consistent surf. The optimum time of year for waves is autumn. The best wind direction is from the north northeast and there is no shelter here from cross shore breezes. Usually gets local windswells, but groundswells do happen and the optimum wave angle is from the south. The river breaks consists of lefts. Good surf at all stages of the tide. A popular wave that can get growded. The crowds in the water make a gath helmet a good idea.

Kugenuma Rivermouth Spot Info

Type:	Rating:	Reliability:	Todays Sea Temp*:
River	2	fairly consistent	22.1°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
Wednesday, 4 November 2026, 23:51 Local Time

m, °C	Thursday 05
ft, °F	0AM	3AM	6AM	9AM
Wave (m)	SE	SE	SE	SE
Period (s)	9	10	10	11
Wind (km/h)
Wind State	cross- off	cross- off	cross- off	cross- off

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: 01:46am | 1.16m

Next Low Water: 07:54am | 0.67m

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

Kugenuma Rivermouth Sea Temperature

The Kugenuma Rivermouth water temperature is warm (22.1 °C) but the air temperature will feel a lot cooler (14.0 °C). A good quality spring wetsuit would be ideal.

Today, many surfers would wear a spring wetsuit.

Current Temp*: 22.1°C*ocean temperature recorded from satellite