Kugenuma Rivermouth Surf Break

Lat Long: 35.31° N 139.47° E

Kugenuma Rivermouth 48 hour detailed Surf Forecast

Issued: 2 am 29 Jul 2026 (local time)

Forecast update in  hr  min

Today's Kugenuma Rivermouth sea temperature is
27.5° 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 (29 Jul):

  • Morning surf: Morning surf (29 Jul, local time) - 2.5ft (0.7m), 6s period with SSW swell.
  • Afternoon surf: Afternoon surf (29 Jul, local time) - 2ft (0.6m), 7s period with SSW swell.
  • Evening surf: Evening surf (29 Jul, local time) - 2ft (0.6m), 7s period with SSW swell.

The current surf forecast for Kugenuma Rivermouth at 9AM is: 0.7m 6s primary swell from a South-southwest direction and 0.1m 10s secondary swell from a Southeast direction (forecast issued at 02:00am July 29). The wind direction is predicted to be glassy.

Time (JST) & DateWave HeightWave Period
Morning (29 Jul)2.5ft (0.7m)6s
Afternoon (29 Jul)2ft (0.6m)7s
Evening (29 Jul)2ft (0.6m)7s

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


Short Range Forecast

Light rain (total 5mm), mostly falling on Thu afternoon. Warm (max 30°C on Wed afternoon, min 25°C on Fri night). Wind will be generally light.

Wednesday
29
Thursday
30
Friday
31
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)
1
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
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.9
SSW
5
0.6
S
5
0.7
SSW
6
0.7
SSW
6
0.6
SSW
7
0.6
SSW
7
0.9
SSW
7
0.6
SSW
7
0.5
SSW
7
0.5
SSW
7
0.5
SSW
7
0.4
SSW
7
0.4
SSW
7
0.5
S
7
0.3
SSW
7
0.3
SSW
7
0.4
SSW
7
0.5
SSW
7
0.6
SSW
7
0.5
S
7
0.5
S
7
0.5
S
7
0.5
S
7
0.3
SSW
6
Wave Graph
Metric surfscale
Energy kJ
42
21
37
43
35
38
88
41
29
28
27
16
17
26
10
10
15
26
36
24
23
22
22
8
Wind (km/h)
10
NNE
5
NW
5
W
5
SSE
5
S
15
SW
15
SW
5
E
15
NNE
10
N
15
N
5
NNW
10
SW
10
S
0
WSW
5
NW
0
NNW
5
NNE
5
N
5
ENE
5
SE
5
SSE
10
S
10
S
Wind State
off
glassy
glassy
glassy
glassy
on
cross-on
cross-off
off
off
cross-off
glassy
cross-on
cross-on
glassy
glassy
glassy
off
off
glassy
cross-on
cross-on
on
cross-on
High Tide
3:53AM1.46m
6:11PM1.44m
4:37AM1.50m
6:27PM1.45m
5:20AM1.52m
6:46PM1.47m
Low Tide
10:54PM1.05m
11:09AM0.11m
11:20PM0.96m
11:38AM0.13m
11:49PM0.86m
12:07PM0.19m
part cloud
clear
clear
clear
clear
clear
part cloud
cloud
light rain
clear
part cloud
part cloud
part cloud
part cloud
rain showers
rain showers
clear
part cloud
part cloud
cloud
part cloud
cloud
part cloud
cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
4:47
4:48
4:48
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:49
6:47
6:46
 mm
1
2
2
Temp °C
26
26
26
27
29
30
29
29
28
28
27
29
29
29
28
27
27
27
27
29
30
30
29
28
Feels °C
30
30
31
31
33
31
30
32
29
30
28
32
31
31
31
31
31
30
30
33
33
33
31
32
  • 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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