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Surf Forecasts:

Kugenuma Rivermouth surfForecast / Kanagawa / Japan

information circle12 Day Weather and Surf, issued 2 pm Friday 06 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
15.4° C
 (Which is 1.1°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 Wednesday (Feb 11) at 12PM. The primary swell is predicted to be 1.0m and 7s period with a secondary swell of 0.1m and 10s. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Kugenuma Rivermouth in the next 12 days are 1.6m 6s and forecast to arrive on Wednesday (Feb 11) at 6AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.7m 3s period and expected on Sunday (Feb 08) at 3PM.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+)12PM (Wed 11th Feb)3.5ft (1.0m) 7s
Best Surf12PM (Wed 11th Feb)3.5ft (1.0m) 7s
Most Powerful 6AM (Wed 11th Feb)5ft (1.6m) 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 A light covering of new snow mostly falling on Sat afternoon. Becoming milder with light rain (total 4mm) on Sat night. Icy conditions (max 13°C on Fri afternoon, min 0°C on Sun night). Winds decreasing (fresh winds from the N on Sun afternoon, light winds from the W by Mon morning).

Days 3-6 Weather Summary Light rain (total 3mm), mostly falling on Tue night. Very mild (max 11°C on Wed afternoon, min 2°C on Mon night). Winds increasing (calm on Tue morning, fresh winds from the WSW by Tue night).

Fri
06
Saturday
07
Sunday
08
Monday
09
Tuesday
10
Wednesday
11
Thursday
12
PMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAM
Rating
(10 max)
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
0
0
0
0
0
Swell
Height Map
See all maps
Wave Height (m) & direction (?)
0.4
SSW
0.4
SSW
0.2
SSW
0.3
SE
0.2
SSW
0.2
SSW
0.7
SSW
0.4
SSW
0.1
SE
0.1
SE
0.1
W
—
0.9
SW
1.2
SW
1.1
SSW
1.1
SW
0.7
SSW
0.6
S
0.6
S
0.4
SSE
0.2
SSE
Period(s) (?)776107691011118-467787777
Wave
Graph
(?)Metric surfscale
Energy kJ (?)1821417547342440024105110109584039175
Wind
(km/h)
10
E
35
NNE
25
NNE
20
N
10
ESE
25
N
35
N
25
N
5
W
10
SSW
10
NNW
5
WNW
25
WSW
30
SW
20
SW
10
N
25
NNE
25
NE
5
SE
10
SW
10
N
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
cross-
off		offoffoffcrosscross-
off		offcross-
off		cross-
on		oncross-
off		glasscross-
on		cross-
on		cross-
on		cross-
off		offoffglasscross-
on		cross-
off
High Tide
/ height (m)
7:21PM
1.27
7:43AM
1.39
8:11PM
1.15
8:11AM
1.37
9:13PM
1.02
8:42AM
1.34
10:52PM
0.92
9:15AM
1.28
9:59AM
1.22
5:15AM 11:23AM
1.15 1.17
5:01AM
1.22
Low Tide
/ height (m)
1:18AM
0.40
2:06PM
0.40
1:43AM
0.55
3:00PM
0.39
2:03AM
0.71
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
Fri
06
Saturday
07
Sunday
08
Monday
09
Tuesday
10
Wednesday
11
Thursday
12
Sunrise--6:37--6:35--6:35--6:33--6:33--6:31--6:31
Sunset5:14--5:15--5:15--5:16--5:17--5:19--5:20--
part cloud
part cloud
light snow
light snow
snow showers
part cloud
light rain
clear
clear
clear
clear
clear
part cloud
rain showers
cloud
cloud
light rain
part cloud
part cloud
clear
clear
Rain (mm)
----3-1------1--2----
Temp. °C139115341355710101011107998
Feels °C (?)91-7-5-4-6-6-8-2011225742645
  • Map Icons:
  • Break
  • 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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