Kugenuma Rivermouth Surf Forecast

/ Kanagawa (21 surf breaks) /

Japan (129 surf breaks) / Lat Long: (35.31° N 139.47° E)

Surf Forecasts:

Kugenuma Rivermouth surfForecast / Kanagawa / Japan

48hr Weather and Surf, issued 8 pm Sunday 31 Aug 2025 JST

Forecast update in hr min s Forecast update imminent

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

Today's Kugenuma Rivermouth sea temperature is 27.7° C
(Which is 1.0°C warmer than normal for this time of year)

How big are the waves at Kugenuma Rivermouth today?

The current surf forecast for Kugenuma Rivermouth at 12AM is: 0.3m 9s primary swell from a Southeast direction and 0.1m 6s secondary swell from a South direction, 0.3m 3s secondary swell from a South direction (forecast issued at 08:00pm August 31). The wind direction is predicted to be onshore.

Time (JST) & Date	Wave Height	Wave Period
Morning (01 Sep)	-	-
Afternoon (01 Sep)	-	-
Evening (01 Sep)	1ft (0.3m)	9s

Table - waves today at Kugenuma Rivermouth. (Swell directed towards the surf break)

Updates in hr min s Forecast update imminent

12 Days Hourly

Print Table

	Sun 31		Monday 01								Tuesday 02								Wednesday 03
	6 PM	9 PM	0 AM	3 AM	6 AM	9 AM	12 PM	3 PM	6 PM	9 PM	0 AM	3 AM	6 AM	9 AM	12 PM	3 PM	6 PM	9 PM	0 AM	3 AM	6 AM	9 AM	12 PM	3 PM
Rating (10 max)	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
Swell Height Map See all maps
Wave Height (m) & direction (?)	SE	SE	SE	SE	SSE	SSE	SSW	SSW	SSW	SSW	SSW	SSW	SE	SE	SE	SSW	SSW	SSW	SSW	SE	SE	SSW	S	S
Period(s) (?)	9	9	9	9	9	9	4	4	4	4	4	4	10	10	10	4	4	4	4	8	7	5	5	4
Wave Graph (?)
Energy (?)	18	15	18	17	12	12	23	34	39	31	30	30	24	21	25	42	55	36	43	37	32	43	56	54
Wind (km/h)	S	S	S	SSW	SW	SSW	S	S	SSW	SSW	SSW	SW	SW	SSW	S	S	SSW	SSW	SW	WSW	SSW	SSW	S	S
Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy	cross- on	cross- on	on	on	on	on	on	on	on	on	on	on	on	on	on	on	on	on	on	cross- on	on	on	on	cross- on
High Tide / height (m)		8:40PM 1.41									9:17PM 1.33						4:39PM 1.35		11:40PM 1.25
Low Tide / height (m)					5:40AM 0.50									7:26AM 0.45					9:11PM 1.23			8:35AM 0.38

	Sun 31		Monday 01								Tuesday 02								Wednesday 03
Sunrise	-	-	-	-	5:13	-	-	-	-	-	-	-	5:13	-	-	-	-	-	-	-	5:15	-	-	-
Sunset	6:10	-	-	-	-	-	-	-	6:09	-	-	-	-	-	-	-	6:08	-	-	-	-	-	-	-

Rain (mm)	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	1	1	-	-
Temp. °C	29	28	28	27	27	28	29	29	30	28	27	27	27	28	30	29	29	28	28	28	26	25	26	25
Feels °C (?)	31	31	31	30	30	30	28	27	30	29	28	28	29	29	30	27	28	28	29	29	26	25	25	25

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

Recent Eyeball Surf Reports for Kanagawa

Wind Update Continuing clean conditions at Kugenuma Rivermouth (calm at Mubeyama wx 15 km from Kugenuma Rivermouth). 0.3m 9s swell from the SE with a 0.3m 3s local chop from the SSW and a 0.1m 6s windswell from the S. 3 swells combining to make bigger set waves.
45 minutes ago Kugenuma Rivermouth

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Actual: 45 min ago

2 km/h

Clean

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