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Kugenuma Rivermouth surfForecast / Kanagawa / Japan
12 Day Weather and Surf, issued 2 pm Thursday 16 Oct 2025 JST
Best Forecast Surf Conditions for Kugenuma Rivermouth this week:
The most powerful waves expected at Kugenuma Rivermouth in the next 12 days are 1.1m 5s and forecast to arrive on Saturday (Oct 18) at 9PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.6m 3s period and expected on Tuesday (Oct 21) at 9AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 9PM (Sat 18th Oct) | 3.5ft (1.1m) 5s |
Table - best surf conditions forecast for Kugenuma Rivermouth over the next 12 days.
Short Range Forecast Mostly dry. Warm (max 24°C on Fri morning, min 20°C on Thu afternoon). Winds increasing (light winds from the NNE on Thu night, fresh winds from the SSW by Sat afternoon). | Days 3-6 Weather Summary Heavy rain (total 28mm), heaviest during Sun night. Very mild (max 19°C on Sun afternoon, min 13°C on Tue afternoon). Winds increasing (light winds from the NE on Sun night, fresh winds from the NNE by Mon night). | ||||||||||||||||||||||
Thu 16 | Friday 17 | Saturday 18 | Sunday 19 | Monday 20 | Tuesday 21 | Wednesday 22 | |||||||||||||||||
| PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | |||
Rating (10 max) | |||||||||||||||||||||||
Swell Height Map |  |  |  |  |  |  |  |  | |||||||||||||||
| Wave Height (m) & direction (?) | |||||||||||||||||||||||
| Period(s) (?) | 5 | 5 | 6 | 6 | 4 | 3 | 4 | 5 | 6 | 6 | 6 | 9 | 8 | 8 | 9 | 9 | 9 | 6 | 7 | 9 | 9 | ||
Wave (?)Graph  | |||||||||||||||||||||||
 kJ (?) | 4 | 6 | 13 | 4 | 5 | 5 | 28 | 53 | 23 | 17 | 8 | 29 | 25 | 11 | 7 | 3 | 8 | 4 | 5 | 13 | 22 | ||
Wind (km/h) | |||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | on | off | off | cross- off | cross- off | on | on | cross | off | cross- off | off | off | off | off | off | off | off | off | off | off | off | ||
High Tide / height (m) | 1:12AM 1.16 | 3:05PM 1.39 | 2:34AM 1.26 | 3:22PM 1.42 | 3:27AM 1.36 | 3:38PM 1.44 | 4:09AM 1.43 | 3:55PM 1.48 | 4:46AM 1.47 | 4:11PM 1.52 | 5:22AM 1.49 | 4:30PM 1.56 | 5:58AM 1.48 | ||||||||||
Low Tide / height (m) | 8:40PM 0.97 | 8:06AM 0.54 | 9:07PM 0.81 | 8:55AM 0.56 | 9:33PM 0.66 | 9:32AM 0.60 | 9:57PM 0.51 | 10:03AM 0.65 | 10:22PM 0.38 | 10:28AM 0.72 | 10:48PM 0.26 | 10:51AM 0.80 | 11:16PM 0.17 | 11:12AM 0.86 | |||||||||
Thu 16 | Friday 17 | Saturday 18 | Sunday 19 | Monday 20 | Tuesday 21 | Wednesday 22 | |||||||||||||||||
| Sunrise | - | - | 5:48 | - | - | 5:50 | - | - | 5:50 | - | - | 5:50 | - | - | 5:52 | - | - | 5:52 | - | - | 5:54 | ||
| Sunset | 5:06 | - | - | 5:05 | - | - | 5:04 | - | - | 5:02 | - | - | 5:00 | - | - | 5:00 | - | - | 4:59 | - | - | ||
 |  |  | | | |  |  | |  |  | | |  | | |  | | | | | |||
Rain (mm) | - | - | - | - | - | - | - | - | - | 2 | 13 | - | - | 1 | 2 | 4 | 6 | - | - | - | - | ||
| Temp. °C | 22 | 22 | 24 | 24 | 21 | 23 | 23 | 23 | 22 | 19 | 16 | 17 | 17 | 17 | 15 | 13 | 13 | 14 | 15 | 15 | 16 | ||
| Feels °C (?) | 22 | 17 | 19 | 19 | 21 | 19 | 18 | 23 | 18 | 16 | 13 | 15 | 14 | 15 | 9 | 8 | 8 | 8 | 10 | 10 | 10 | ||
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Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
Recent Eyeball Surf Reports for Kanagawa
Continuing clean conditions at Kugenuma Rivermouth (calm at Zushi Kanagawa 9 km from Kugenuma Rivermouth). 0.6m 7s swell from the SE with a 0.3m 3s local chop from the S. 2 swells combining to make bigger set waves.
Actual: 32 min ago
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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.
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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