Surf Forecasts:
Kugenuma Rivermouth surf forecast from 13 Nov 2026:
- Best quality surf: Sunday 29 Nov, 6AM (local time) - 7ft (2.2m), 8s period, SW swell with cross-offshore winds.
- Most powerful swell: Sunday 29 Nov, 3AM (local time) - 7ft (2.2m), 8s period, SSW swell with 699 kJ wave energy.
- Next surfable swell (1★+): Monday 16 Nov, 3AM (local time) - 3ft (0.9m), 8s period with S 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 Monday (Nov 16) at 3AM. The primary swell is predicted to be 0.9m and 8s period with a secondary swell of 0.4m 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 16 days are 2.2m 8s and forecast to arrive on Sunday (Nov 29) at 3AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.1m 6s period and expected on Saturday (Nov 21) at 9PM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3AM (Mon 16th Nov) | 3ft (0.9m) 8s |
| Best Surf | 6AM (Sun 29th Nov) | 7ft (2.2m) 8s |
| Most Powerful | 3AM (Sun 29th Nov) | 7ft (2.2m) 8s |
Table - best surf conditions forecast for Kugenuma Rivermouth over the next 16 days.
Short Range ForecastModerate rain (total 14mm), heaviest on Sun afternoon. Very mild (max 18°C on Sat morning, min 13°C on Sun afternoon). Wind will be generally light. | Days 5-7 Weather SummaryHeavy rain (total 20mm), heaviest during Tue afternoon. Very mild (max 18°C on Wed afternoon, min 10°C on Tue afternoon). Winds increasing (calm on Wed morning, near gales from the WSW by Thu morning). | |||||||||||||||||||
Fri 13 | Saturday 14 | Sunday 15 | Monday 16 | Tuesday 17 | Wednesday 18 | Thursday 19 | ||||||||||||||
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) | SSW 4 | S 5 | S 5 | S 6 | S 7 | S 6 | S 6 | S 6 | S 8 | S 8 | S 7 | SSW 7 | SE 7 | SSE 7 | SSE 8 | SSE 8 | SSE 8 | SE 8 | SSW 8 | SW 7 |
Wave Graph  | ||||||||||||||||||||
 kJ | 4 | 13 | 9 | 9 | 15 | 18 | 18 | 24 | 72 | 41 | 16 | 9 | 25 | 47 | 217 | 197 | 85 | 11 | 13 | 211 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | off | cross-off | glassy | glassy | cross | off | off | off | off | cross-off | off | off | off | off | cross-on | cross-on | cross-on | cross-on | cross-on |
High Tide | 5:44PM1.53m | 8:30AM1.32m | 6:23PM1.45m | 9:27AM1.29m | 7:12PM1.33m | 10:34AM1.28m | 8:23PM1.19m | 11:42AM1.29m | 10:21PM1.08m | 12:38PM1.31m | 00:40AM1.08m | 1:19PM1.34m | 2:19AM1.16m | |||||||
Low Tide | 1:08AM0.14m | 12:50PM1.09m | 1:54AM0.24m | 1:57PM1.11m | 2:50AM0.37m | 4:13PM1.08m | 4:03AM0.51m | 6:21PM0.96m | 5:30AM0.62m | 7:26PM0.79m | 6:49AM0.71m | 8:12PM0.62m | ||||||||
 |  |  | | |  |  | | | |  | | |  |  |  |  | | | | |
 | — | — | 6:15 | — | — | 6:16 | — | — | 6:16 | — | — | 6:18 | — | — | 6:18 | — | — | 6:20 | — | — |
 | 4:37 | — | — | 4:37 | — | — | 4:36 | — | — | 4:35 | — | — | 4:35 | — | — | 4:34 | — | — | 4:34 | — |
mm | — | — | — | — | — | 4 | 10 | — | — | — | — | 2 | 6 | 11 | — | 1 | — | — | — | — |
Temp °C | 17 | 17 | 18 | 18 | 18 | 15 | 14 | 16 | 17 | 17 | 17 | 12 | 12 | 12 | 17 | 18 | 18 | 13 | 14 | 12 |
Feels °C | 15 | 16 | 16 | 16 | 16 | 14 | 9 | 14 | 13 | 15 | 13 | 7 | 6 | 7 | 17 | 15 | 12 | 2 | 4 | 4 |
Swell 1 Height (m) Direction Period (s) | SE 8 | S 5 | S 5 | S 6 | S 7 | S 6 | S 6 | S 6 | S 8 | S 8 | S 7 | SSW 7 | SE 7 | SSE 7 | SSE 8 | SSE 8 | SSE 8 | SSW 5 | SSW 8 | SSW 5 |
| kJ | 3 | 13 | 9 | 9 | 15 | 18 | 18 | 24 | 72 | 41 | 16 | 9 | 25 | 47 | 217 | 197 | 85 | 5 | 13 | 19 |
Swell 2 Height (m) Direction Period (s) | E 10 | E 9 | SE 11 | SE 7 | SSE 5 | SE 11 | SE 11 | SE 10 | SE 10 | SE 10 | SE 10 | SE 7 | SSW 7 | E 10 | — | — | SW 6 | SE 8 | SE 9 | SW 8 |
| kJ | 2 | 1 | 4 | 2 | 3 | 5 | 4 | 4 | 4 | 4 | 4 | 2 | 5 | 2 | — | — | 46 | 11 | 3 | 16 |
Swell 3 Height (m) Direction Period (s) | — | — | ESE 8 | SE 11 | E 9 | — | — | — | — | — | SW 8 | SE 10 | E 10 | — | — | — | — | SSE 8 | — | SE 9 |
| kJ | — | — | 6 | 4 | 2 | — | — | — | — | — | 2 | 4 | 2 | — | — | — | — | 6 | — | 3 |
Wind waves Height (m) Direction Period (s) | SSW 4 | — | — | — | — | — | N 2 | N 3 | NNE 2 | — | — | NNE 3 | N 3 | NNE 3 | N 3 | — | — | NE 3 | — | SW 7 |
| kJ | 4 | — | — | — | — | — | 1 | 1 | 1 | — | — | 3 | 5 | 3 | 1 | — | — | 2 | — | 211 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 84 | 24 | 57 | 57 | 24 | 24 | 61 | 30 | 0 | 30 | 222 | 508 | 482 | 545 | 0 | 89 | 480 | 482 | 482 | 566 |
Best forecast wave conditions in Kanagawa | ||||||||||||||||||||
Best forecast wave conditions in Japan | ||||||||||||||||||||
Header Global | ||||||||||||||||||||
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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 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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