Surf Forecasts:
Kugenuma Rivermouth surf forecast from 24 Jun 2026:
- Best quality surf: Sunday 28 Jun, 12AM (local time) - 15ft (4.5m), 11s period, SSW swell with offshore winds.
- Most powerful swell: Sunday 28 Jun, 12AM (local time) - 15ft (4.5m), 11s period, SSW swell with 5,072 kJ wave energy.
- Next surfable swell (1★+): Friday 26 Jun, 12AM (local time) - 1.5ft (0.5m), 13s period with SW 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 Friday (Jun 26) at 12AM. The primary swell is predicted to be 0.5m and 13s period with a secondary swell of 0.5m and 7s. Another secondary swell of 0.5m and 7s is also forecast. 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 4.5m 11s and forecast to arrive on Sunday (Jun 28) at 12AM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.6m 3s period and expected on Thursday (Jun 25) at 12PM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12AM (Fri 26th Jun) | 1.5ft (0.5m) 13s |
| Best Surf | 12AM (Sun 28th Jun) | 15ft (4.5m) 11s |
| Most Powerful | 12AM (Sun 28th Jun) | 15ft (4.5m) 11s |
Table - best surf conditions forecast for Kugenuma Rivermouth over the next 16 days.
Updates in hr min s Forecast update imminent
Short Range ForecastHeavy rain (total 231mm), heaviest during Sat morning. Warm (max 23°C on Fri afternoon, min 19°C on Thu morning). Mainly fresh winds. | Days 5-7 Weather SummaryHeavy rain (total 75mm), heaviest during Sat night. Warm (max 25°C on Tue morning, min 21°C on Sat night). Mainly fresh winds. | ||||||||||||||||||||
Thursday 25 | Friday 26 | Saturday 27 | Sunday 28 | Monday 29 | Tuesday 30 | Wed 1 | |||||||||||||||
Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | |
Swell Height Map |  |  |  |  |  |  |  |  | |||||||||||||
Wave Height (m) Direction Period (s) | SE 10 | SW 16 | S 7 | SW 13 | SW 13 | SSW 6 | S 6 | S 7 | S 8 | SSW 11 | S 11 | S 10 | S 9 | SSW 8 | S 7 | S 7 | SE 9 | SE 9 | SE 9 | SSW 7 | SE 9 |
Wave Graph  | |||||||||||||||||||||
 kJ | 17 | 38 | 78 | 80 | 78 | 117 | 94 | 58 | 172 | 5072 | 694 | 320 | 123 | 39 | 27 | 28 | 22 | 13 | 13 | 18 | 17 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | off | off | off | on | cross | cross-on | cross | cross-off | off | cross-off | cross-off | off | off | cross-off | off | off | cross-on | cross-on | glassy | glassy |
High Tide | 00:06AM1.32m | 3:33PM1.13m | 00:53AM1.34m | 4:32PM1.23m | 1:38AM1.36m | 5:13PM1.30m | 2:21AM1.40m | 5:45PM1.34m | 3:02AM1.44m | 6:12PM1.37m | 3:44AM1.47m | 6:36PM1.38m | 4:27AM1.48m | ||||||||
Low Tide | 7:59AM0.37m | 7:30PM1.02m | 8:48AM0.25m | 8:38PM1.08m | 9:30AM0.14m | 9:30PM1.11m | 10:08AM0.06m | 10:10PM1.12m | 10:43AM0.01m | 10:45PM1.10m | 11:16AM-0.00m | 11:18PM1.05m | 11:49AM0.01m | ||||||||
 |  |  |  |  | | | | | | |  | |  | |  | | | | | | |
 | — | 4:28 | — | — | 4:28 | — | — | 4:28 | — | — | 4:28 | — | — | 4:28 | — | — | 4:30 | — | — | 4:30 | — |
 | 7:00 | — | 7:00 | — | — | 7:00 | — | — | 7:00 | — | — | 7:00 | — | — | 7:00 | — | — | 7:00 | — | — | 7:00 |
mm | 11 | 22 | 6 | 2 | — | — | 70 | 77 | 43 | 72 | — | 2 | 1 | — | — | — | — | — | — | 7 | 7 |
Temp °C | 22 | 20 | 20 | 20 | 21 | 23 | 22 | 22 | 22 | 23 | 24 | 22 | 21 | 21 | 23 | 22 | 25 | 24 | 23 | 22 | 21 |
Feels °C | 24 | 18 | 16 | 21 | 22 | 24 | 24 | 25 | 23 | 25 | 26 | 23 | 23 | 22 | 26 | 25 | 27 | 26 | 25 | 25 | 24 |
Swell 1 Height (m) Direction Period (s) | SE 10 | SW 16 | S 7 | SSE 7 | SW 13 | SW 13 | SW 14 | S 7 | S 8 | S 9 | S 11 | S 10 | S 9 | SSE 7 | S 7 | S 7 | SW 7 | SSW 7 | SE 9 | SE 9 | SE 9 |
| kJ | 17 | 38 | 78 | 26 | 78 | 57 | 29 | 58 | 172 | 1063 | 694 | 320 | 123 | 31 | 26 | 28 | 14 | 10 | 13 | 13 | 13 |
Swell 2 Height (m) Direction Period (s) | SSW 10 | S 4 | SW 14 | S 7 | SE 10 | SE 11 | SE 10 | SW 13 | SW 13 | E 16 | — | E 15 | E 15 | SSW 8 | SSW 8 | SE 10 | SE 9 | SE 9 | SSW 7 | S 4 | E 13 |
| kJ | 10 | 3 | 50 | 26 | 4 | 4 | 4 | 27 | 25 | 5 | — | 4 | 4 | 39 | 27 | 14 | 22 | 13 | 5 | 1 | 3 |
Swell 3 Height (m) Direction Period (s) | SW 15 | SSW 9 | SE 10 | SW 13 | SW 9 | — | E 18 | SW 9 | E 16 | — | — | ESE 15 | ESE 15 | E 15 | SSE 9 | E 14 | E 14 | E 13 | E 13 | SW 7 | ESE 13 |
| kJ | 9 | 16 | 26 | 80 | 3 | — | 6 | 3 | 5 | — | — | 22 | 21 | 4 | 8 | 4 | 4 | 4 | 4 | 2 | 17 |
Wind waves Height (m) Direction Period (s) | — | NE 3 | NNE 3 | NNW 4 | S 6 | SSW 6 | S 6 | — | — | SSW 11 | — | — | — | — | — | — | — | — | S 3 | SSW 7 | SSW 4 |
| kJ | — | 3 | 9 | 2 | 39 | 117 | 94 | — | — | 5072 | — | — | — | — | — | — | — | — | 2 | 18 | 7 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 64 | 105 | 140 | 0 | 7 | 18 | 26 | 9 | 0 | 137 | 0 | 19 | 0 | 0 | 0 | 30 | 45 | 30 | 61 | 24 | 24 |
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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