Kugenuma Rivermouth surfForecast / Kanagawa / Japan

information circle16 Day Weather and Surf, issued 8 am Sunday 31 May 2026 JST
Forecast update in hr  min  s Forecast update imminent
Kugenuma Rivermouth surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Kugenuma Rivermouth sea temperature is
20.6° C
(Which is 1.1°C colder than average for this time of year)

Kugenuma Rivermouth surf forecast from 31 May 2026:

  • Best quality surf: Wednesday 3 Jun, 3PM (local time) - 13ft (4.0m), 10s period, SSE swell with offshore winds.
  • Most powerful swell: Wednesday 3 Jun, 9PM (local time) - 10ft (3.0m), 13s period, S swell with 3,637 kJ wave energy.
  • Next surfable swell (1★+): Wednesday 3 Jun, 6AM (local time) - 2ft (0.6m), 12s period with SSW swell.

Best Forecast Surf Conditions for Kugenuma Rivermouth this week:

The surf forecast for Kugenuma Rivermouth over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Wednesday (Jun 03) at 6AM. The primary swell is predicted to be 0.6m and 12s period with a secondary swell of 0.3m and 16s. Another secondary swell of 0.9m and 6s is also forecast. The wind is predicted to be offshore as the swell arrives.

The most powerful waves expected at Kugenuma Rivermouth in the next 16 days are 3.0m 13s and forecast to arrive on Wednesday (Jun 03) at 9PM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.3m 5s period and expected on Thursday (Jun 04) at 12AM.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+) 6AM (Wed 3rd Jun)2ft (0.6m) 12s
Best Surf 3PM (Wed 3rd Jun)13ft (4.0m) 10s
Most Powerful 9PM (Wed 3rd Jun)10ft (3.0m) 13s

Table - best surf conditions forecast for Kugenuma Rivermouth over the next 16 days.


Updates in  hr  min  s Forecast update imminent

Short Range Forecast

Light rain (total 7mm), mostly falling on Tue night. Warm (max 26°C on Sun afternoon, min 19°C on Tue night). Mainly fresh winds.

Days 4-6 Weather Summary

Heavy rain (total 161mm), heaviest during Wed afternoon. Warm (max 23°C on Thu morning, min 16°C on Fri night). Winds decreasing (near gales from the N on Wed night, light winds from the NE by Fri night).

Sunday
31
Monday
1
Tuesday
2
Wednesday
3
Thursday
4
Friday
5
Saturday
6
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
0
0
0
1
0
0
0
0
0
2
!
1
1
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
Wave
Height (m)
Direction
Period (s)
0.3
S
15
0.5
S
13
0.6
S
12
0.6
S
11
0.9
S
10
0.9
SSW
13
0.9
SSW
13
0.9
SSW
13
0.7
SW
12
2.3
SE
7
4
SSE
10
1.9
SSW
13
0.9
SSW
11
0.8
SSW
10
0.7
S
8
0.5
S
8
0.4
SSW
8
0.3
SSW
7
0.3
SSW
7
0.5
S
3
0.6
S
4
Wave Graph
Metric surfscale
Energy kJ
39
81
98
86
156
238
285
257
152
529
2864
1099
176
107
68
32
19
10
9
5
10
Wind (km/h)
10
NNE
10
S
20
SW
5
SSW
25
S
20
SSW
15
S
20
S
15
SSW
30
NNE
45
NE
55
N
35
N
25
NE
25
NNE
25
NE
25
ENE
20
NE
20
NE
15
ENE
20
NE
off
cross-on
on
on
on
on
on
on
on
off
off
off
off
cross-off
off
off
cross-off
off
cross-off
cross-off
off
High Tide
6:02PM1.32m
3:57AM1.47m
6:36PM1.32m
4:31AM1.48m
7:12PM1.31m
5:09AM1.46m
7:49PM1.30m
5:51AM1.41m
8:30PM1.29m
6:40AM1.32m
9:14PM1.28m
7:38AM1.21m
10:02PM1.27m
Low Tide
10:48AM-0.03m
10:38PM0.99m
11:21AM-0.06m
11:08PM1.00m
11:56AM-0.05m
11:44PM1.00m
12:32PM-0.01m
00:27AM0.99m
1:12PM0.07m
1:21AM0.97m
1:56PM0.19m
2:35AM0.94m
2:45PM0.34m
cloud
part cloud
clear
clear
clear
part cloud
cloud
cloud
mod rain
heavy rain
heavy rain
heavy rain
part cloud
part cloud
cloud
part cloud
part cloud
part cloud
part cloud
cloud
cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
4:28
4:28
4:28
4:28
4:28
4:26
4:26
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:50
6:51
6:51
6:52
6:52
6:52
6:53
7
40
77
44
Temp °C
25
26
21
23
22
21
21
21
22
19
19
20
23
23
20
20
20
18
19
19
18
26
25
17
22
20
18
20
20
22
16
13
15
20
21
17
16
16
15
17
16
15
Swell 1
Height (m)
Direction
Period (s)
0.3
S
6
0.5
S
13
0.6
S
12
0.6
S
11
0.5
SSW
14
0.9
SSW
13
0.9
SSW
13
0.9
SSW
13
0.7
SW
12
1.3
SSE
7
2.5
S
10
1.9
SSW
13
0.9
SSW
11
0.8
SSW
10
0.7
S
8
0.5
S
8
0.4
SSW
8
0.3
SSW
7
0.3
SSW
7
0.1
SE
11
0.1
S
8
Energy kJ
6
81
98
86
105
238
285
257
152
158
1293
1099
176
107
68
32
19
10
9
5
1
Swell 2
Height (m)
Direction
Period (s)
0.3
S
15
0.1
SE
12
0.1
SE
12
0.3
SSW
14
0.1
SE
11
0.1
SE
11
0.1
SE
11
0.1
SE
11
0.1
SE
11
0.4
SSW
12
0.4
SW
16
1.3
SSE
10
0.9
SSE
9
0.7
SSE
9
0.3
SE
9
0.3
SE
8
0.1
SE
8
0.1
SE
8
0.1
SE
7
0.1
E
7
0.1
SE
10
Energy kJ
39
6
5
39
5
5
5
5
5
56
85
347
130
65
12
10
2
2
2
1
4
Swell 3
Height (m)
Direction
Period (s)
0.1
SE
12
0.3
SE
12
0.2
ESE
10
0.3
SSW
17
0.3
ESE
10
0.2
E
9
0.3
SE
11
0.1
S
15
0.1
S
14
0.3
SW
15
0.2
SSW
20
1.2
S
11
0.4
E
10
0.1
S
12
0.1
SE
12
0.1
SE
12
0.1
SE
11
0.1
E
7
Energy kJ
6
23
9
56
18
6
20
4
4
36
39
329
32
3
5
5
5
1
Wind waves
Height (m)
Direction
Period (s)
0.3
S
6
1.2
SSW
6
0.6
S
5
0.9
S
10
0.4
SSW
3
0.4
SSE
4
0.7
S
4
0.7
S
6
2.3
SE
7
4
SSE
10
1.3
NNW
5
0.4
NNE
3
0.3
E
4
0.5
S
3
0.6
S
4
Energy kJ
6
84
20
156
4
7
13
34
529
2864
75
3
3
5
10
Nearest Offshore or Glassy
Rating
(10 max)
1
1
1
1
2
1
2
2
1
4
4
5
1
2
1
1
1
1
1
1
1
Distance (km)
2
26
19
2
85
19
64
85
7
813
545
130
49
130
463
140
484
484
1497
545
545
Best forecast wave conditions in Kanagawa
Rating
(10 max)
1
1
1
1
2
1
Best forecast wave conditions in Japan
Rating
(10 max)
2
3
3
4
4
4
4
4
1
4
4
5
3
3
1
1
2
2
1
1
2
Header Global
Rating
(10 max)
7
6
5
5
4
4
5
5
6
5
5
5
5
4
5
5
5
9
6
6
9
  • 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
submit an eyeball surf report

Quick surf report for Kugenuma Rivermouth:

join our community of surf reporters

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.


Information about the Kugenuma Rivermouth Surf forecast

The above surf forecast table for Kugenuma Rivermouth provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Kugenuma Rivermouth can be found by selecting the local surf guide option on the grey menu. Our Kugenuma Rivermouth surf forecast is unique since it includes wave energy (power) that defines the real feel of the surf rather than just the height or the period. If you surf the same spot (Kugenuma Rivermouth) regularly then make a mental note of the wave energy from the surf forecast table each time you go. Very soon you may start to choose your surf days based on the wave energy alone combined with our forecast of favourable offshore wind conditions. Our star ratings will help here and of course you will also find the usual wave height and period predictions on our surf forecasts as well as a full break down of the swell components under our advanced users option (to reveal that, click the little Einstein character under the tide times).

Further information to help with frequently asked questions about our surf forecast for Kugenuma Rivermouth may be found under the help tab on the top menu and also by moving your mouse over the question marks on the surf forecast table itself. Please always bear in mind that the forecast is for near-shore open water and local factors at each surf break influence the actual breaking wave height, such as the beach / reef profile, water depths offshore and shelter.

Nearest locationNearest
Nearest locationNearest
Nearest locationNearest