Kugenuma Rivermouth Surf Break

Lat Long: 35.31° N 139.47° E

Kugenuma Rivermouth 48 hour detailed Surf Forecast

Issued: 8 pm 07 Aug 2026 (local time)

Forecast update in  hr  min

Today's Kugenuma Rivermouth sea temperature is
26.9° C
0.1° 

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


How big are the waves at Kugenuma Rivermouth today (08 Aug):

  • Morning surf: Morning surf (08 Aug, local time) - 3.5ft (1.1m), 11s period with S swell.
  • Afternoon surf: Afternoon surf (08 Aug, local time) - 3.5ft (1.1m), 11s period with S swell.
  • Evening surf: Evening surf (08 Aug, local time) - 3ft (0.9m), 11s period with S swell.

The current surf forecast for Kugenuma Rivermouth at 1AM is: 1.3m 11s primary swell from a South direction and 0.1m 12s secondary swell from a Southeast direction (forecast issued at 08:00pm August 07). The wind direction is predicted to be onshore.

Time (JST) & DateWave HeightWave Period
Morning (08 Aug)3.5ft (1.1m)11s
Afternoon (08 Aug)3.5ft (1.1m)11s
Evening (08 Aug)3ft (0.9m)11s

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


Short Range Forecast

Mostly dry. Warm (max 29°C on Sun afternoon, min 25°C on Sun night). Wind will be generally light.

Fri
7
Saturday
8
Sunday
9
6 PM
9 PM
12 AM
3 AM
6 AM
9 AM
12 PM
3 PM
6 PM
9 PM
12 AM
3 AM
6 AM
9 AM
12 PM
3 PM
6 PM
9 PM
Rating
(10 max)
0
0
0
0
1
0
0
0
0
0
0
0
1
1
0
0
0
0
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.4
S
12
1.4
S
11
1.3
S
11
1.3
S
11
1.2
S
11
1.1
S
11
1.1
S
11
1.1
S
11
1
S
11
0.9
S
11
0.9
SSW
11
0.8
SSW
11
0.6
S
9
0.7
SSW
10
0.7
SSW
10
0.6
SSW
11
0.6
SSW
11
0.6
S
11
Wave Graph
Metric surfscale
Energy kJ
535
499
418
426
377
307
297
284
235
188
191
150
62
112
112
88
88
82
Wind (km/h)
20
S
15
S
15
S
15
S
10
S
10
SSE
15
S
20
S
15
S
15
S
10
SSW
10
S
5
SE
5
E
5
SE
10
S
15
S
15
SE
Wind State
on
on
on
on
cross-on
cross-on
cross-on
on
on
on
on
cross-on
glassy
glassy
cross
cross-on
on
cross-on
High Tide
10:28PM1.35m
5:09PM1.29m
11:56PM1.32m
5:08PM1.37m
Low Tide
7:46AM0.40m
8:22PM1.25m
8:49AM0.30m
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
part cloud
part cloud
part cloud
clear
clear
cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
4:54
4:56
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:39
6:38
6:37
 mm
Temp °C
28
27
27
26
26
27
28
28
27
27
26
26
26
27
28
29
28
27
Feels °C
30
30
30
28
29
30
30
28
28
29
28
29
30
31
30
30
29
28
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
Map placeholder
How to use the Wavefinder 

FREE! Surf-Forecast.com widget for your website

The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Kugenuma Rivermouth surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.


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