Kugenuma Rivermouth Surf Break

Lat Long: 35.31° N 139.47° E

Kugenuma Rivermouth 48 hour detailed Surf Forecast

Issued: 8 pm 22 Jul 2026 (local time)

Forecast update in  hr  min

Today's Kugenuma Rivermouth sea temperature is
27.1° C
1.2° 

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 (23 Jul):

  • Morning surf: Morning surf (23 Jul, local time) - 1.5ft (0.4m), 6s period with SSW swell.
  • Afternoon surf: Afternoon surf (23 Jul, local time) - 1.5ft (0.4m), 6s period with SSW swell.
  • Evening surf: Evening surf (23 Jul, local time) - 0.5ft (0.2m), 10s period with SSE swell.

The current surf forecast for Kugenuma Rivermouth at 3AM is: 0.9m 6s primary swell from a Southwest direction and 0.6m 5s secondary swell from a South-southwest direction, 0.1m 11s secondary swell from a Southeast direction (forecast issued at 08:00pm July 22). The wind direction is predicted to be cross-offshore.

Time (JST) & DateWave HeightWave Period
Morning (23 Jul)1.5ft (0.4m)6s
Afternoon (23 Jul)1.5ft (0.4m)6s
Evening (23 Jul)0.5ft (0.2m)10s

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


Short Range Forecast

Light rain (total 8mm), mostly falling on Thu night. Warm (max 32°C on Thu morning, min 26°C on Fri night). Wind will be generally light.

Wed
22
Thursday
23
Friday
24
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
1
0
0
0
0
0
0
0
0
0
0
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)
0.6
SSW
5
0.8
SSW
5
0.6
SSW
5
0.9
SW
6
0.5
SSW
6
0.4
SSW
6
0.4
SSW
6
0.4
SSW
6
0.3
SSW
6
0.2
SSE
10
0.2
SSE
10
0.2
SSE
10
0.2
SSE
9
0.2
SSE
9
0.2
SSE
9
0.2
SSE
9
0.3
SE
11
0.3
SE
11
Wave Graph
Metric surfscale
Energy kJ
17
25
17
46
20
15
13
13
7
10
12
12
12
12
12
11
18
18
Wind (km/h)
15
SSW
15
SW
10
WSW
10
NNW
15
NE
10
ENE
5
E
15
S
15
SSE
5
E
10
ENE
10
ENE
15
ENE
5
E
10
S
15
S
15
SSE
15
SE
Wind State
on
on
cross-on
cross-off
off
cross-off
cross-off
cross-on
cross-on
cross-off
cross-off
cross-off
cross-off
cross-off
on
on
cross-on
cross-on
High Tide
9:55PM1.40m
10:41PM1.37m
5:19PM1.20m
Low Tide
6:01AM0.51m
7:24AM0.41m
6:26PM1.19m
clear
clear
clear
clear
clear
clear
clear
clear
clear
thunderstorm
cloud
part cloud
part cloud
cloud
part cloud
part cloud
thunderstorm
thunderstorm
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
4:43
4:43
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:53
6:52
6:52
 mm
1
1
1
Temp °C
31
29
29
29
28
31
32
31
30
29
28
28
27
27
28
28
28
27
Feels °C
35
32
33
33
31
34
36
34
33
33
31
32
30
31
31
31
31
31
  • 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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