Kugenuma Rivermouth Surf Break

Lat Long: 35.31° N 139.47° E

Kugenuma Rivermouth 48 hour detailed Surf Forecast

Issued: 8 am 10 Oct 2026 (local time)

Forecast update in  hr  min

Today's Kugenuma Rivermouth sea temperature is
23.8°C
0.1° 

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 (10 Oct):

  • Morning surf: Morning surf (10 Oct, local time) - 1.5ft (0.4m), 14s period with ESE swell.
  • Afternoon surf: Afternoon surf (10 Oct, local time) - 2.5ft (0.7m), 13s period with ESE swell.
  • Evening surf: Evening surf (10 Oct, local time) - 2ft (0.6m), 12s period with ESE swell.

The current surf forecast for Kugenuma Rivermouth at 4PM is: 0.7m 13s primary swell from a East-southeast direction and 0.1m 9s secondary swell from a South direction (forecast issued at 08:00am October 10). The wind direction is predicted to be cross-offshore.

Time (JST) & DateWave HeightWave Period
Morning (10 Oct)1.5ft (0.4m)14s
Afternoon (10 Oct)2.5ft (0.7m)13s
Evening (10 Oct)2ft (0.6m)12s

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


Short Range Forecast

Mostly dry. Warm (max 25°C on Sun afternoon, min 19°C on Sat night). Mainly fresh winds.

Saturday
10
Sunday
11
Monday
12
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
1
0
1
0
0
1
1
1
1
0
1
1
2
3
3
2
2
1
1
0
2
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)
0.4
SE
14
0.4
ESE
14
0.6
ESE
13
0.7
ESE
13
0.6
ESE
12
0.6
ESE
12
0.7
SE
12
0.6
ESE
12
0.6
ESE
12
0.6
ESE
12
0.6
ESE
11
0.5
ESE
11
0.4
SE
19
0.6
SE
18
0.8
SE
16
0.9
SE
16
0.9
SE
15
0.8
SE
15
0.8
SE
14
0.8
SE
14
0.9
SE
14
0.8
SE
14
Wave Graph
Metric surfscale
Energy kJ
53
75
120
149
99
98
149
94
91
88
84
69
127
197
314
362
322
301
297
297
346
285
Wind (km/h)
15
NNE
15
NNE
20
NE
15
ENE
15
E
15
NE
15
NNE
15
NNE
15
NNE
15
NNE
15
ENE
10
E
10
ENE
10
ENE
15
NE
15
NNE
20
NE
20
NE
20
NE
25
ENE
30
ENE
25
NE
Wind State
off
off
cross-off
cross-off
cross-off
cross-off
off
off
off
off
cross-off
cross-off
cross-off
cross-off
off
off
off
off
cross-off
cross-off
cross-off
off
High Tide
4:26AM1.47m
4:17PM1.50m
5:02AM1.51m
4:34PM1.54m
5:37AM1.51m
4:54PM1.58m
Low Tide
10:24AM0.62m
10:40PM0.38m
10:48AM0.69m
11:06PM0.27m
11:09AM0.77m
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:43
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5:43
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—
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5:43
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—
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<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
—
—
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5:14
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—
—
—
—
—
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5:13
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—
—
—
—
—
5:12
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 mm
—
—
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—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
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Temp °C
19
20
22
24
23
21
20
20
19
21
23
25
24
22
21
20
19
20
23
24
22
20
Feels °C
18
18
20
21
21
19
19
19
18
19
21
23
23
21
20
18
17
17
20
20
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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