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Surf Forecasts:

Kugenuma Rivermouth surfForecast / Kanagawa / Japan

information circle12 Day Weather and Surf, issued 2 pm Monday 09 Feb 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
15.5° C
 (Which is slightly cooler than normal)

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 Wednesday (Feb 11) at 12PM. The primary swell is predicted to be 2.4m and 8s period. 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 2.4m 8s and forecast to arrive on Wednesday (Feb 11) at 12PM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 3s period and expected on Monday (Feb 16) at 9AM.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+)12PM (Wed 11th Feb)8ft (2.4m) 8s
Best Surf12PM (Wed 11th Feb)8ft (2.4m) 8s
Most Powerful12PM (Wed 11th Feb)8ft (2.4m) 8s

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 Moderate rain (total 17mm), heaviest on Wed morning. Very mild (max 11°C on Tue night, min 4°C on Mon night). Winds increasing (calm on Mon night, fresh winds from the SW by Tue afternoon).

Days 3-6 Weather Summary Mostly dry. Very mild (max 12°C on Sat afternoon, min 6°C on Thu night). Wind will be generally light.

Mon
09
Tuesday
10
Wednesday
11
Thursday
12
Friday
13
Saturday
14
Sunday
15
PMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAM
Rating
(10 max)
0
0
0
0
0
0
3
1
0
0
0
0
0
0
0
0
0
0
0
0
0
Swell
Height Map
See all maps
Wave Height (m) & direction (?)
0.1
S
0.1
S
—
0.9
SSW
1.4
SW
1.9
SSW
1.9
SSW
1
S
0.6
S
0.4
SSW
0.2
SSW
0.1
SE
0.1
SE
0.2
SSE
0.2
SSE
0.1
SE
0.3
SE
0.3
SE
0.3
SE
1.1
SW
0.2
ESE
Period(s) (?)116-4678988810981010111111610
Wave
Graph
(?)Metric surfscale
Energy kJ (?)3102912436550915849216437941818186710
Wind
(km/h)
15
S
10
N
5
NNE
35
SW
35
SW
15
W
5
NE
20
NE
20
NNE
5
NW
5
N
5
NNE
5
SSE
10
N
5
NNE
10
SSE
10
W
5
WNW
10
SSE
15
W
20
N
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
onoffoffcross-
on		cross-
on		cross-
on		offoffoffglasscross-
off		offglassoffoffcross-
on		cross-
on		glasscross-
on		cross-
on		off
High Tide
/ height (m)
10:52PM
0.92
9:15AM
1.28
9:59AM
1.22
5:15AM 11:23AM
1.15 1.17
5:01AM
1.22
1:16PM
1.16
5:10AM
1.27
2:34PM
1.21
5:22AM
1.29
3:29PM
1.28
5:34AM
1.30
Low Tide
/ height (m)
4:10PM
0.38
2:00AM
0.85
5:47PM
0.36
7:24PM
0.29
8:03AM
1.12
8:34PM
0.20
9:30AM
1.06
9:24PM
0.12
10:06AM
0.97
10:04PM
0.07
10:32AM
0.88
10:38PM
0.05
10:55AM
0.77
Mon
09
Tuesday
10
Wednesday
11
Thursday
12
Friday
13
Saturday
14
Sunday
15
Sunrise--6:33--6:33--6:31--6:31--6:30--6:28--6:28
Sunset5:16--5:17--5:19--5:20--5:21--5:22--5:22--
clear
part cloud
part cloud
cloud
part cloud
heavy rain
cloud
rain showers
part cloud
clear
part cloud
clear
part cloud
part cloud
clear
part cloud
part cloud
clear
clear
part cloud
cloud
Rain (mm)
-----16-1-------------
Temp. °C66810119896888101010121212141311
Feels °C (?)0331366415557878991185
  • 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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