Kugenuma Rivermouth Surf Break

Lat Long: 35.31° N 139.47° E

Kugenuma Rivermouth 48 hour detailed Surf Forecast

Issued: 2 pm 13 Jul 2026 (local time)

Forecast update in  hr  min

Today's Kugenuma Rivermouth sea temperature is
24.7° C
0.6° 

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 (13 Jul):

  • Afternoon surf: Afternoon surf (13 Jul, local time) - 3ft (0.9m), 12s period with SSW swell.
  • Evening surf: Evening surf (13 Jul, local time) - 2.5ft (0.8m), 11s period with SSW swell.

The current surf forecast for Kugenuma Rivermouth at 10PM is: 0.8m 11s primary swell from a South-southwest direction and 0.1m 9s secondary swell from a Southeast direction (forecast issued at 02:00pm July 13). The wind direction is predicted to be glassy.

Time (JST) & DateWave HeightWave Period
Morning (13 Jul)--
Afternoon (13 Jul)3ft (0.9m)12s
Evening (13 Jul)2.5ft (0.8m)11s

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


Short Range Forecast

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

Mon
13
Tuesday
14
Wednesday
15
Thu
16
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
12 AM
3 AM
6 AM
9 AM
Rating
(10 max)
1
1
1
1
1
1
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
Height Map
Wave
Height (m)
Direction
Period (s)
0.9
SSW
12
0.9
SSW
12
0.8
SSW
12
0.8
SSW
11
0.7
SSW
11
0.6
SSW
11
0.6
SSW
11
0.6
SSW
11
0.5
SSW
11
0.5
SSW
10
0.4
SSW
10
0.4
SSW
10
0.4
SSW
10
0.4
SSW
10
0.4
SSW
10
0.4
SSW
9
0.6
S
9
0.8
S
9
0.9
SSW
4
0.9
SSW
4
0.9
SSW
5
0.8
SSW
5
0.8
SSW
5
0.7
S
5
Wave Graph
Metric surfscale
Energy kJ
210
206
158
145
109
95
93
91
64
59
39
39
38
38
36
34
61
106
28
31
35
29
31
22
Wind (km/h)
5
S
10
SSW
5
ESE
5
ESE
0
NE
5
SE
10
SSW
15
S
20
S
20
S
25
S
20
S
20
S
15
SSW
5
SW
10
SSW
20
S
25
S
25
SSW
30
SSW
25
SSW
20
SSW
10
SW
0
ENE
Wind State
cross-on
on
glassy
glassy
glassy
glassy
on
on
cross-on
on
on
on
on
on
on
on
on
cross-on
on
on
on
on
on
glassy
High Tide
5:58PM1.39m
3:24AM1.45m
6:17PM1.41m
4:10AM1.48m
6:36PM1.42m
4:54AM1.49m
Low Tide
10:23AM0.07m
10:36PM1.12m
10:57AM0.05m
11:07PM1.06m
11:29AM0.05m
11:37PM0.98m
cloud
cloud
cloud
part cloud
clear
clear
clear
part cloud
part cloud
part cloud
part cloud
clear
part cloud
clear
clear
clear
part cloud
clear
part cloud
cloud
part cloud
part cloud
part cloud
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
4:37
4:37
4:37
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:58
6:58
6:57
6:57
 mm
Temp °C
28
27
28
27
27
26
25
26
27
27
27
26
26
25
26
27
28
28
28
27
26
26
26
28
Feels °C
32
31
32
31
31
30
27
28
28
28
28
27
28
27
30
30
30
29
29
28
27
28
29
33
  • 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
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