Kugenuma Rivermouth Surf Break

Lat Long: 35.31° N 139.47° E

Kugenuma Rivermouth 48 hour detailed Surf Forecast

Issued: 2 am 01 Aug 2026 (local time)

Forecast update in  hr  min

Today's Kugenuma Rivermouth sea temperature is
27.6° C
1.1° 

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 (01 Aug):

  • Morning surf: Morning surf (01 Aug, local time) - 1ft (0.3m), 7s period with SSW swell.
  • Afternoon surf: Afternoon surf (01 Aug, local time) - 1.5ft (0.4m), 6s period with SSW swell.
  • Evening surf: Evening surf (01 Aug, local time) - 2.5ft (0.7m), 6s period with SSW swell.

The current surf forecast for Kugenuma Rivermouth at 6AM is: 0.3m 7s primary swell from a South-southwest direction and 0.1m 10s secondary swell from a Southeast direction (forecast issued at 02:00am August 01). The wind direction is predicted to be offshore.

Time (JST) & DateWave HeightWave Period
Morning (01 Aug)1ft (0.3m)7s
Afternoon (01 Aug)1.5ft (0.4m)6s
Evening (01 Aug)2.5ft (0.7m)6s

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


Short Range Forecast

Mostly dry. Warm (max 31°C on Sun morning, min 23°C on Sun night). Winds increasing (calm on Sat night, fresh winds from the NE by Mon night).

Saturday
1
Sunday
2
Monday
3
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
12 AM
3 AM
6 AM
9 AM
12 PM
3 PM
6 PM
9 PM
Rating
(10 max)
0
0
0
0
0
0
0
1
1
0
1
1
1
0
0
0
0
1
1
1
1
2
2
2
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.4
SSW
6
0.3
SSW
6
0.3
SSW
7
0.3
SSW
7
0.3
SSW
7
0.4
SSW
6
0.2
ESE
16
0.7
SSW
6
0.3
SE
17
0.2
ESE
18
0.4
SE
15
0.4
ESE
16
0.4
ESE
16
0.5
SE
15
0.5
SE
15
0.5
SE
16
0.6
ESE
15
0.6
SE
15
0.6
SE
16
0.8
SE
16
0.8
SE
17
0.9
SE
17
1
SE
18
1.1
SE
18
Wave Graph
Metric surfscale
Energy kJ
13
8
9
9
9
14
25
30
46
30
60
99
97
104
115
122
148
191
198
302
358
487
600
679
Wind (km/h)
5
ESE
5
N
5
N
5
ENE
10
SSE
15
SSW
10
SSW
5
SSE
5
ESE
5
NE
10
NE
15
ENE
15
ENE
10
ESE
25
ENE
25
NE
25
NE
25
NE
25
NE
25
NE
25
NE
25
NE
25
NE
30
NE
Wind State
glassy
glassy
off
glassy
cross-on
on
on
glassy
glassy
cross-off
off
cross-off
cross-off
cross
cross-off
cross-off
off
off
off
off
off
off
off
off
High Tide
6:02AM1.50m
7:08PM1.49m
6:46AM1.45m
7:32PM1.50m
7:33AM1.36m
8:00PM1.50m
Low Tide
00:21AM0.76m
12:35PM0.28m
00:57AM0.67m
1:03PM0.40m
1:38AM0.60m
1:31PM0.54m
clear
clear
part cloud
clear
part cloud
part cloud
part cloud
cloud
part cloud
clear
part cloud
part cloud
clear
part cloud
part cloud
cloud
cloud
cloud
cloud
part cloud
part cloud
cloud
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
4:50
4:50
4:50
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:45
6:45
6:44
 mm
Temp °C
27
27
27
29
30
30
29
29
29
29
29
30
31
31
28
25
24
23
23
24
25
26
26
24
Feels °C
31
31
30
33
33
33
32
34
34
33
33
33
33
34
28
24
23
22
21
22
23
24
24
21
  • 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 

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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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