Kugenuma Rivermouth Surf Break

Lat Long: 35.31° N 139.47° E

Kugenuma Rivermouth 48 hour detailed Surf Forecast

Issued: 2 pm 09 Sep 2026 (local time)

Forecast update in  hr  min

Today's Kugenuma Rivermouth sea temperature is
27.8°C
1.4° 

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 (09 Sep):

  • Afternoon surf: Afternoon surf (09 Sep, local time) - 6ft (1.9m), 9s period with S swell.
  • Evening surf: Evening surf (09 Sep, local time) - 5ft (1.5m), 9s period with S swell.

The current surf forecast for Kugenuma Rivermouth at 7PM is: 1.6m 9s primary swell from a South direction and 1.2m 8s secondary swell from a South-southeast direction (forecast issued at 02:00pm September 09). The wind direction is predicted to be offshore.

Time (JST) & DateWave HeightWave Period
Morning (09 Sep)--
Afternoon (09 Sep)6ft (1.9m)9s
Evening (09 Sep)5ft (1.5m)9s

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


Short Range Forecast

Heavy rain (total 27mm), heaviest during Wed night. Warm (max 29°C on Wed afternoon, min 19°C on Thu night). Winds decreasing (fresh winds from the N on Wed afternoon, light winds from the NE by Sat morning).

Wed
9
Thursday
10
Friday
11
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
1
0
1
1
0
1
1
1
1
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
Wave
Height (m)
Direction
Period (s)
1.9
S
9
1.9
S
9
1.7
S
9
1.5
S
9
1.4
S
9
1.3
S
9
1.1
S
9
1
S
8
0.9
S
8
0.8
S
8
0.7
S
8
0.6
S
8
0.6
S
8
0.6
S
8
0.5
S
8
0.5
S
8
0.5
S
8
0.5
S
8
0.5
S
8
0.4
SSW
8
Wave Graph
Metric surfscale
Energy kJ
549
562
455
351
306
258
181
143
113
88
64
48
45
44
30
28
28
28
28
19
Wind (km/h)
25
SW
20
SW
30
N
30
NE
30
NNE
30
NNE
25
NE
25
NE
20
NNE
20
NNE
20
NNE
20
NNE
15
NNE
15
NNE
15
NNE
15
NNE
15
NNE
15
NNE
15
NNE
10
NNE
Wind State
on
on
cross-off
cross-off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
High Tide
4:45PM1.45m
3:46AM1.44m
4:57PM1.47m
4:26AM1.51m
5:10PM1.49m
Low Tide
9:55AM0.33m
10:20PM0.85m
10:27AM0.35m
10:42PM0.73m
10:54AM0.39m
part cloud
part cloud
light rain
light rain
mod rain
cloud
cloud
cloud
cloud
cloud
cloud
light rain
light rain
light rain
cloud
cloud
light rain
light rain
light rain
light rain
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:20
5:20
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:59
5:57
5:55
 mm
2
4
7
2
2
1
1
4
2
1
Temp °C
28
29
24
22
22
21
20
21
20
21
21
20
19
19
20
20
20
19
20
20
Feels °C
30
31
22
20
20
18
17
19
18
20
19
19
19
18
20
20
20
19
20
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 

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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