Kugenuma Rivermouth Surf Break

Lat Long: 35.31° N 139.47° E

Kugenuma Rivermouth 48 hour detailed Surf Forecast

Issued: 2 pm 25 Oct 2026 (local time)

Forecast update in  hr  min

Today's Kugenuma Rivermouth sea temperature is
23.7°C
1.0° 

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 (25 Oct):

  • Afternoon surf: Afternoon surf (25 Oct, local time) - 5ft (1.6m), 6s period with SSW swell.
  • Evening surf: Evening surf (25 Oct, local time) - 3.5ft (1.1m), 7s period with S swell.

The current surf forecast for Kugenuma Rivermouth at 9PM is: 1.1m 7s primary swell from a South direction and 0.3m 12s secondary swell from a Southwest direction (forecast issued at 02:00pm October 25). An open ocean swell of 0.4m 3s is not directed at the surf break. The wind direction is predicted to be offshore.

Time (JST) & DateWave HeightWave Period
Morning (25 Oct)--
Afternoon (25 Oct)5ft (1.6m)6s
Evening (25 Oct)3.5ft (1.1m)7s

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


Short Range Forecast

Heavy rain (total 52mm), heaviest during Mon afternoon. Warm (max 26°C on Sun afternoon, min 14°C on Tue night). Mainly strong winds.

Sun
25
Monday
26
Tuesday
27
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
2
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
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)
1.3
SSW
6
1.6
SSW
6
1.3
S
7
1.1
S
7
1
S
7
0.8
SSW
7
0.6
S
7
0.5
S
7
0.5
S
7
0.4
SSW
7
0.3
SSW
7
0.4
SE
7
0.4
SE
8
0.4
SE
8
0.4
SE
6
0.4
SSW
8
0.6
S
8
0.6
S
8
0.8
S
8
0.9
S
8
Wave Graph
Metric surfscale
Energy kJ
106
176
157
124
112
73
38
25
24
15
11
19
20
15
14
19
41
44
84
108
Wind (km/h)
35
SW
35
SW
25
NNE
15
NNE
20
NE
20
ENE
15
NE
20
NNE
20
NNE
30
N
25
N
30
N
35
N
30
N
15
N
15
NNE
15
NNE
20
NE
10
NE
10
NE
Wind State
on
cross-on
off
off
cross-off
cross-off
cross-off
off
off
off
off
off
cross-off
cross-off
off
off
off
off
cross-off
cross-off
High Tide
3:59PM1.51m
5:21AM1.47m
4:20PM1.56m
5:57AM1.47m
4:43PM1.59m
Low Tide
10:20AM0.77m
10:42PM0.23m
10:43AM0.84m
11:10PM0.15m
11:05AM0.90m
clear
cloud
light rain
cloud
light rain
light rain
light rain
light rain
mod rain
mod rain
mod rain
light rain
light rain
light rain
light rain
cloud
light rain
rain showers
cloud
cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
—
—
—
—
—
5:56
—
—
—
—
—
—
—
5:56
—
—
—
—
—
—
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
—
4:55
—
—
—
—
—
—
—
4:53
—
—
—
—
—
—
—
4:52
—
—
 mm
—
—
1
—
1
2
1
3
7
9
10
4
3
2
1
—
3
3
—
—
Temp °C
25
26
22
21
20
19
19
19
18
18
17
17
17
17
17
18
18
18
19
18
Feels °C
22
24
20
20
19
17
18
18
16
15
14
13
12
13
16
17
17
17
19
18
  • 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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