Kugenuma Rivermouth Surf Break

Lat Long: 35.31° N 139.47° E

Kugenuma Rivermouth 48 hour detailed Surf Forecast

Issued: 2 pm 28 Oct 2026 (local time)

Forecast update in  hr  min

Today's Kugenuma Rivermouth sea temperature is
23.8°C
1.3° 

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 (28 Oct):

  • Afternoon surf: Afternoon surf (28 Oct, local time) - 1ft (0.3m), 7s period with S swell.
  • Evening surf: Evening surf (28 Oct, local time) - 0.5ft (0.2m), 7s period with S swell.

The current surf forecast for Kugenuma Rivermouth at 6PM is: 0.3m 7s primary swell from a South direction and 0.1m 11s secondary swell from a Southeast direction (forecast issued at 02:00pm October 28). An open ocean swell of 0.5m 3s is not directed at the surf break. The wind direction is predicted to be offshore.

Time (JST) & DateWave HeightWave Period
Morning (28 Oct)--
Afternoon (28 Oct)1ft (0.3m)7s
Evening (28 Oct)0.5ft (0.2m)7s

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


Short Range Forecast

Some drizzle, heaviest during Wed afternoon. Warm (max 22°C on Sat morning, min 13°C on Wed night). Wind will be generally light.

Wed
28
Thursday
29
Friday
30
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
0
0
0
0
0
0
0
0
0
1
1
1
2
2
2
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)
0.3
SSW
8
0.3
S
7
0.3
S
7
0.2
S
7
0.1
E
16
0.1
SE
15
0.1
SE
15
0.1
SE
15
0.2
ESE
14
0.3
SE
13
0.3
SE
13
0.6
SSE
8
0.7
SE
8
0.9
SSE
8
1.2
SSE
8
1.1
SSE
8
1.2
SSE
9
1.3
SSE
9
1.2
SSE
9
1.1
SSE
8
Wave Graph
Metric surfscale
Energy kJ
12
9
9
5
5
9
8
8
21
28
28
40
67
120
188
177
197
233
212
160
Wind (km/h)
15
N
25
NNE
25
NNE
20
NNE
15
NE
15
ENE
15
NE
15
NE
15
NNE
10
NE
5
NNE
5
NNW
5
NE
5
N
10
NNW
10
NE
10
E
15
S
15
WSW
15
W
Wind State
off
off
off
off
off
cross-off
off
off
off
off
off
cross-off
glassy
glassy
cross-off
off
cross-off
cross-on
cross-on
cross-on
High Tide
5:09PM1.61m
7:17AM1.39m
5:39PM1.59m
8:05AM1.33m
6:11PM1.53m
Low Tide
11:29AM0.96m
00:16AM0.10m
11:55AM1.01m
00:54AM0.14m
12:25PM1.06m
part cloud
light rain
clear
part cloud
part cloud
cloud
part cloud
cloud
part cloud
cloud
clear
part cloud
cloud
cloud
cloud
cloud
part cloud
cloud
cloud
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
—
—
—
—
—
5:58
—
—
—
—
—
—
—
—
6:00
—
—
—
—
—
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
—
4:52
—
—
—
—
—
—
—
4:51
—
—
—
—
—
—
—
4:50
—
—
 mm
—
1
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
Temp °C
19
19
15
15
14
14
13
14
14
15
16
15
15
16
16
17
18
19
20
20
Feels °C
15
13
8
9
9
10
9
10
11
13
15
14
14
16
15
15
16
16
17
17
  • 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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