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Surf Forecasts:

Kugenuma Rivermouth surfForecast / Kanagawa / Japan

information circle12 Day Weather and Surf, issued 8 pm Tuesday 27 Jan 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
14.9° C
 (Which is 1.9°C colder than average for this time of year)

Best Forecast Surf Conditions for Kugenuma Rivermouth this week:

The surf forecast for Kugenuma Rivermouth over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Sunday (Feb 01) at 3AM. The primary swell is predicted to be 1.3m and 5s period with a secondary swell of 0.5m and 5s. Another secondary swell of 0.1m and 8s 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 12 days are 1.3m 6s and forecast to arrive on Sunday (Feb 01) at 6AM. Winds are predicted to be glassy at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 3s period and expected on Wednesday (Jan 28) at 6AM.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+) 3AM (Sun 1st Feb)4.5ft (1.3m) 5s
Best Surf 3AM (Sun 1st Feb)4.5ft (1.3m) 5s
Most Powerful 6AM (Sun 1st Feb)4.5ft (1.3m) 6s

Table - best surf conditions forecast for Kugenuma Rivermouth over the next 12 days.

Updates in  hr  min  s Forecast update imminent 
12 DaysHourly
Print Table

Short Range Forecast Some drizzle, heaviest during Wed night. Mild temperatures (max 8°C on Tue night, min 3°C on Wed night). Winds decreasing (fresh winds from the N on Tue night, calm by Thu afternoon).

Days 3-6 Weather Summary Mostly dry. Mild temperatures (max 9°C on Mon afternoon, min 3°C on Fri night). Wind will be generally light.

Wednesday
28
Thursday
29
Friday
30
Saturday
31
Sunday
01
Monday
02
Tue
03
NightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPM
Rating
(10 max)
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Swell
Height Map
See all maps
Wave Height (m) & direction (?)
0.3
SSW
0.1
E
0.1
E
0.1
SW
0.1
SW
0.1
SW
0.3
SW
0.3
SW
0.1
E
0.4
SW
0.1
SW
0.1
SW
0.4
SW
0.6
SW
0.1
E
0.4
SW
0.2
SSW
0.2
SSW
0.2
SSW
0.2
SSW
—
Period(s) (?)510106776817888671285484-
Wave
Graph
(?)Metric surfscale
Energy kJ (?)5221225117182282931623620
Wind
(km/h)
20
N
25
NNE
10
ESE
20
NE
15
N
5
SSE
15
N
5
NNW
15
SSE
15
NNE
5
NNE
10
S
10
N
10
N
10
E
10
NNW
10
N
10
S
20
N
5
NNW
5
E
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
offoffcrosscross-
off		offcross-
on		offcross-
off		cross-
on		offglasscross-
on		cross-
off		offcross-
off		cross-
off		cross-
off		cross-
on		cross-
off		glassglass
High Tide
/ height (m)
11:12AM
1.24
5:07AM
1.18
12:34PM
1.22
5:18AM
1.25
1:54PM
1.24
5:33AM
1.29
2:55PM
1.28
5:47AM
1.31
3:45PM
1.33
6:01AM
1.32
4:29PM
1.38
6:16AM
1.34
5:11PM
1.40
Low Tide
/ height (m)
8:13PM
0.23
8:37AM
1.12
9:08PM
0.14
9:44AM
1.08
9:51PM
0.06
10:21AM
1.01
10:28PM
0.02
10:48AM
0.93
11:00PM
0.01
11:13AM
0.83
11:29PM
0.03
11:40AM
0.73
Wednesday
28
Thursday
29
Friday
30
Saturday
31
Sunday
01
Monday
02
Tue
03
Sunrise-6:43--6:43--6:43--6:41--6:41--6:41--6:39-
Sunset--5:05--5:06--5:07--5:07--5:08--5:09--5:10
clear
part cloud
part cloud
light rain
clear
part cloud
part cloud
clear
part cloud
part cloud
part cloud
part cloud
part cloud
cloud
part cloud
clear
clear
clear
clear
clear
clear
Rain (mm)
---1-----------------
Temp. °C867656556546667769779
Feels °C (?)312212201-212333325145
  • Map Icons:
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  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
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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.

View detailed surf forecast for Kugenuma Rivermouth at:
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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 12 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.

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