Surf Forecasts:
Kugenuma Rivermouth surf forecast from 5 Oct 2026:
- Best quality surf: Wednesday 7 Oct, 12AM (local time) - 8ft (2.5m), 16s period, SE swell with offshore winds.
- Most powerful swell: Tuesday 6 Oct, 12PM (local time) - 10ft (3.0m), 17s period, SE swell with 4,797 kJ wave energy.
- Next surfable swell (1★+): Wednesday 7 Oct, 12AM (local time) - 8ft (2.5m), 16s period with SE 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 (Oct 07) at 12AM. The primary swell is predicted to be 2.5m and 16s period. 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 17s and forecast to arrive on Tuesday (Oct 06) 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 0.5m 3s period and expected on Saturday (Oct 10) at 6PM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12AM (Wed 7th Oct) | 8ft (2.5m) 16s |
| Best Surf | 12AM (Wed 7th Oct) | 8ft (2.5m) 16s |
| Most Powerful | 12PM (Tue 6th Oct) | 10ft (3.0m) 17s |
Table - best surf conditions forecast for Kugenuma Rivermouth over the next 16 days.
Short Range ForecastMostly dry. Warm (max 27°C on Tue morning, min 19°C on Wed night). Winds decreasing (fresh winds from the NE on Tue afternoon, calm by Thu afternoon). | Days 4-6 Weather SummaryMostly dry. Warm (max 25°C on Sun afternoon, min 18°C on Fri night). Wind will be generally light. | ||||||||||||||||||||
Tuesday 6 | Wednesday 7 | Thursday 8 | Friday 9 | Saturday 10 | Sunday 11 | Monday 12 | |||||||||||||||
AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Swell Height Map |  |  |  |  |  |  |  | ||||||||||||||
Wave Height (m) Direction Period (s) | SE 17 | SE 17 | SE 16 | SE 15 | ESE 14 | ESE 12 | SE 11 | SE 10 | ESE 17 | ESE 18 | ESE 16 | ESE 15 | SE 14 | SE 13 | SE 12 | SE 12 | SE 12 | SE 15 | ESE 15 | ESE 13 | ESE 12 |
Wave Graph  | |||||||||||||||||||||
 kJ | 4589 | 4742 | 3193 | 1048 | 134 | 58 | 29 | 26 | 27 | 30 | 26 | 44 | 100 | 175 | 144 | 203 | 139 | 220 | 348 | 219 | 93 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | cross-off | off | off | cross-off | cross-off | cross-off | glassy | cross-off | off | cross-off | off | off | off | off | off | cross-off | off | off | cross-off | off |
High Tide | 3:17PM1.37m | 1:57AM1.23m | 3:32PM1.41m | 3:01AM1.33m | 3:47PM1.43m | 3:47AM1.41m | 4:02PM1.46m | 4:26AM1.47m | 4:17PM1.50m | 5:02AM1.51m | 4:34PM1.54m | 5:37AM1.51m | 4:54PM1.58m | ||||||||
Low Tide | 9:02PM0.94m | 8:43AM0.51m | 9:28PM0.79m | 9:24AM0.52m | 9:52PM0.64m | 9:57AM0.56m | 10:16PM0.51m | 10:24AM0.62m | 10:40PM0.38m | 10:48AM0.69m | 11:06PM0.27m | 11:09AM0.77m | 11:35PM0.20m | ||||||||
 | |  |  | |  | | |  | | | | | | | | | | | | | |
 | 5:39 | — | — | 5:39 | — | — | 5:41 | — | — | 5:41 | — | — | 5:43 | — | — | 5:43 | — | — | 5:43 | — | — |
 | — | 5:20 | — | — | 5:19 | — | — | 5:16 | — | — | 5:15 | — | — | 5:14 | — | — | 5:13 | — | — | 5:12 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 27 | 27 | 24 | 22 | 23 | 21 | 21 | 22 | 20 | 21 | 23 | 20 | 22 | 24 | 21 | 23 | 25 | 21 | 23 | 25 | 21 |
Feels °C | 24 | 24 | 21 | 20 | 22 | 19 | 19 | 21 | 19 | 19 | 20 | 18 | 19 | 21 | 19 | 21 | 23 | 19 | 19 | 21 | 19 |
Swell 1 Height (m) Direction Period (s) | SE 17 | SE 17 | SE 16 | SE 15 | ESE 14 | ESE 12 | SE 11 | SE 10 | SE 9 | SE 9 | SE 8 | ESE 15 | SE 14 | SE 13 | SE 12 | SE 12 | SE 12 | SE 15 | ESE 15 | ESE 13 | ESE 12 |
| kJ | 4589 | 4742 | 3193 | 1048 | 127 | 58 | 29 | 26 | 13 | 12 | 11 | 44 | 100 | 175 | 144 | 203 | 139 | 220 | 348 | 219 | 93 |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | SE 13 | SE 11 | ESE 11 | SE 5 | SE 5 | ESE 18 | ESE 16 | SE 8 | SE 10 | SE 16 | SE 15 | SE 18 | ESE 11 | SSE 11 | SE 9 | SSE 9 | SSE 10 |
| kJ | — | — | — | — | 134 | 20 | 12 | 1 | 4 | 30 | 26 | 10 | 23 | 89 | 106 | 13 | 12 | 47 | 23 | 16 | 9 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | E 20 | E 18 | E 18 | ESE 17 | SE 12 | SE 11 | SE 11 | — | — | — | ESE 18 | ESE 16 | SE 10 | — | SE 16 | — |
| kJ | — | — | — | — | — | 7 | 6 | 6 | 27 | 5 | 5 | 5 | — | — | — | 31 | 26 | 112 | — | 10 | — |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | NNE 3 | — | — | — | — | — | NNE 2 | NE 3 | NE 3 | NNE 3 | NNE 3 | NE 2 | — | — | — |
| kJ | — | — | — | — | — | — | 1 | — | — | — | — | — | 1 | 2 | 3 | 3 | 2 | 1 | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 545 | 49 | 0 | 0 | 0 | 2 | 45 | 24 | 30 | 45 | 49 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 45 | 0 |
Best forecast wave conditions in Kanagawa | |||||||||||||||||||||
Best forecast wave conditions in Japan | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
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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 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.
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