Kugenuma Rivermouth Surf Break

Lat Long: 35.31° N 139.47° E

Kugenuma Rivermouth 48 hour detailed Surf Forecast

Issued: 8 am 04 Oct 2026 (local time)

Forecast update in  hr  min

Today's Kugenuma Rivermouth sea temperature is
24.5°C
0.2° 

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 (04 Oct):

  • Morning surf: Morning surf (04 Oct, local time) - 2ft (0.6m), 10s period with SE swell.
  • Afternoon surf: Afternoon surf (04 Oct, local time) - 2ft (0.6m), 11s period with SE swell.
  • Evening surf: Evening surf (04 Oct, local time) - 2ft (0.6m), 10s period with SE swell.

The current surf forecast for Kugenuma Rivermouth at 12PM is: 0.6m 10s primary swell from a Southeast direction and 0.1m 15s secondary swell from a Southeast direction (forecast issued at 08:00am October 04). An open ocean swell of 0.2m 2s is not directed at the surf break. The wind direction is predicted to be cross-offshore.

Time (JST) & DateWave HeightWave Period
Morning (04 Oct)2ft (0.6m)10s
Afternoon (04 Oct)2ft (0.6m)11s
Evening (04 Oct)2ft (0.6m)10s

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


Short Range Forecast

Mostly dry. Warm (max 27°C on Tue morning, min 19°C on Sun night). Mainly fresh winds.

Sunday
4
Monday
5
Tuesday
6
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
0
0
0
0
1
2
3
2
3
4
4
4
4
4
5
5
5
5
3
4
5
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)
0.6
SE
10
0.6
SE
10
0.6
SE
10
0.6
SE
11
0.6
SE
10
0.6
SE
10
0.8
SSE
16
1
SSE
15
1.3
SSE
16
1.3
SSE
15
1.5
SSE
16
1.6
SSE
16
1.7
SSE
16
2
SSE
17
2.2
SE
16
2.3
SE
17
2.5
SE
17
2.5
SE
17
2.5
SE
17
3
SE
17
3
SE
18
3
SE
18
Wave Graph
Metric surfscale
Energy kJ
61
61
65
90
85
69
306
461
778
837
1027
1257
1575
2323
2349
3074
3668
4043
4090
4589
4852
5074
Wind (km/h)
15
NE
20
NE
20
NE
20
ENE
25
ENE
20
NE
20
NNE
25
N
25
N
25
NNE
25
NNE
25
NNE
25
NNE
25
NNE
20
NNE
20
N
15
NNE
20
NNE
25
NNE
30
NE
35
NE
35
NNE
Wind State
off
cross-off
cross-off
cross-off
cross-off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
cross-off
off
off
High Tide
3:51PM1.27m
8:13PM1.24m
3:06PM1.33m
11:54PM1.16m
3:17PM1.37m
Low Tide
4:32AM0.50m
7:33PM1.24m
6:28AM0.53m
8:35PM1.10m
7:48AM0.52m
part cloud
part cloud
cloud
cloud
part cloud
cloud
part cloud
part cloud
cloud
cloud
cloud
part cloud
cloud
cloud
cloud
part cloud
part cloud
part cloud
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:37
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5:39
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5:39
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<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
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5:22
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5:21
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5:20
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 mm
—
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Temp °C
20
21
22
23
22
21
20
20
19
20
21
22
22
22
22
22
22
23
27
27
24
23
Feels °C
17
18
19
19
18
18
17
17
15
16
17
19
19
19
19
20
20
20
24
24
20
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
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