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Surf Forecasts:
Kugenuma Rivermouth surfForecast / Kanagawa / Japan
16 Day Weather and Surf, issued 2 pm Monday 01 Jun 2026 JSTForecast 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
21.1° C
(Which is slightly cooler than normal)Kugenuma Rivermouth surf forecast from 1 Jun 2026:
- Best quality surf: Wednesday 3 Jun, 12PM (local time) - 11ft (3.5m), 10s period, S swell with cross-offshore winds.
- Most powerful swell: Wednesday 3 Jun, 3PM (local time) - 15ft (4.5m), 12s period, S swell with 4,818 kJ wave energy.
- Next surfable swell (1★+): Wednesday 3 Jun, 12PM (local time) - 11ft (3.5m), 10s 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 Wednesday (Jun 03) at 12PM. The primary swell is predicted to be 3.5m and 10s period with a secondary swell of 0.6m and 16s. Another secondary swell of 0.3m and 20s is also forecast. 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 4.5m 12s and forecast to arrive on Wednesday (Jun 03) at 3PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 4s period and expected on Wednesday (Jun 03) at 3PM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12PM (Wed 3rd Jun) | 11ft (3.5m) 10s |
| Best Surf | 12PM (Wed 3rd Jun) | 11ft (3.5m) 10s |
| Most Powerful | 3PM (Wed 3rd Jun) | 15ft (4.5m) 12s |
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 236mm), heaviest during Wed morning. Warm (max 24°C on Mon afternoon, min 17°C on Wed afternoon). Winds increasing (light winds from the ESE on Tue night, severe gales from the NNW by Wed afternoon). | Days 5-7 Weather SummaryMostly dry. Warm (max 23°C on Fri afternoon, min 16°C on Fri night). Winds decreasing (fresh winds from the NNE on Thu night, light winds from the E by Sun morning). | ||||||||||||||||||||
Mon 1 | Tuesday 2 | Wednesday 3 | Thursday 4 | Friday 5 | Saturday 6 | Sunday 7 | |||||||||||||||
PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | |
Swell Height Map |  |  |  |  |  |  |  |  | |||||||||||||
SSW 14 | SSW 13 | SSW 14 | SSW 13 | SSW 12 | SSE 8 | S 12 | S 12 | SSW 10 | S 9 | S 8 | SSW 8 | SSW 7 | SSW 7 | SE 11 | SE 11 | SE 10 | SE 10 | S 10 | S 7 | S 10 | |
145 | 238 | 147 | 261 | 127 | 618 | 4818 | 963 | 137 | 76 | 33 | 11 | 10 | 5 | 5 | 5 | 4 | 4 | 2 | 1 | 2 | |
Wind (km/h) | |||||||||||||||||||||
on | on | on | on | cross | cross-off | cross-off | cross-off | off | off | off | off | cross-off | off | cross-off | cross-off | cross-off | cross-off | on | cross-off | off | |
High Tide | 6:36PM1.32m | 4:31AM1.48m | 7:12PM1.31m | 5:09AM1.46m | 7:49PM1.30m | 5:51AM1.41m | 8:30PM1.29m | 6:40AM1.32m | 9:14PM1.28m | 7:38AM1.21m | 10:02PM1.27m | 8:55AM1.08m | 10:52PM1.26m | 10:40AM1.00m | |||||||
Low Tide | 11:08PM1.00m | 11:56AM-0.05m | 11:44PM1.00m | 12:32PM-0.01m | 00:27AM0.99m | 1:12PM0.07m | 1:21AM0.97m | 1:56PM0.19m | 2:35AM0.94m | 2:45PM0.34m | 4:13AM0.87m | 3:42PM0.49m | 5:47AM0.75m | ||||||||
 |  |  | |  |  | | |  | | | | |  | | | | | |  | | |
 | — | — | 4:28 | — | — | 4:28 | — | — | 4:28 | — | — | 4:26 | — | — | 4:26 | — | — | 4:26 | — | — | 4:26 |
 | 6:51 | — | — | 6:51 | — | — | 6:52 | — | — | 6:52 | — | — | 6:52 | — | — | 6:53 | — | — | 6:53 | — | 6:54 |
— | — | — | — | 42 | 145 | 49 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Temp °C | 24 | 22 | 22 | 22 | 19 | 20 | 19 | 20 | 24 | 22 | 21 | 22 | 23 | 20 | 19 | 20 | 17 | 19 | 20 | 19 | 18 |
22 | 19 | 19 | 19 | 18 | 15 | 11 | 17 | 22 | 19 | 16 | 17 | 20 | 15 | 16 | 17 | 14 | 19 | 19 | 19 | 14 | |
Swell 1 Height (m) Direction Period (s) | SSW 14 | SSW 13 | SSW 12 | SSW 13 | SSW 12 | SW 13 | S 12 | S 12 | SSW 10 | S 9 | S 8 | SSW 8 | SSW 7 | SSW 7 | S 7 | S 7 | S 6 | S 7 | S 7 | S 7 | S 7 |
 kJ | 145 | 238 | 147 | 261 | 127 | 26 | 4818 | 963 | 137 | 76 | 33 | 11 | 10 | 5 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
Swell 2 Height (m) Direction Period (s) | S 10 | SSW 18 | SSW 14 | SE 11 | SE 11 | SW 15 | SSE 11 | SSE 9 | SE 9 | SE 8 | SE 8 | SE 8 | SE 8 | SE 12 | SE 11 | SE 11 | SE 10 | E 5 | E 6 | — | — |
| kJ | 48 | 31 | 138 | 5 | 5 | 36 | 3378 | 572 | 79 | 25 | 10 | 2 | 2 | 5 | 5 | 5 | 4 | 1 | 1 | — | — |
Swell 3 Height (m) Direction Period (s) | SE 11 | SE 11 | SE 11 | S 15 | S 14 | S 13 | — | S 10 | SE 13 | — | E 13 | SE 12 | SE 12 | E 7 | — | SE 11 | E 6 | SE 10 | S 10 | E 5 | S 10 |
| kJ | 5 | 5 | 5 | 4 | 4 | 4 | — | 271 | 7 | — | 3 | 5 | 5 | 1 | — | 5 | 1 | 4 | 2 | 1 | 2 |
Wind waves Height (m) Direction Period (s) | S 3 | SSW 4 | SSW 3 | S 4 | S 5 | SSE 8 | NW 4 | — | — | — | NNE 2 | NE 3 | NE 3 | ENE 3 | NNE 3 | NE 3 | E 3 | — | — | NE 2 | NNE 3 |
| kJ | 5 | 20 | 7 | 9 | 19 | 618 | 24 | — | — | — | 1 | 4 | 1 | 7 | 4 | 1 | 1 | — | — | 1 | 9 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 879 | 19 | 85 | 85 | 7 | 499 | 503 | 0 | 0 | 0 | 140 | 130 | 137 | 137 | 140 | 45 | 45 | 63 | 24 | 63 | 463 |
Best forecast wave conditions in Kanagawa | |||||||||||||||||||||
Best forecast wave conditions in Japan | |||||||||||||||||||||
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FREE! Surf-Forecast.com widget for your website
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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