Surf Forecasts:
Sosanji Rivermouth surf forecast from 21 Sep 2026:
- Best quality surf: Monday 28 Sep, 3AM (local time) - 4.5ft (1.4m), 14s period, SSE swell with cross-offshore winds.
- Most powerful swell: Monday 28 Sep, 9AM (local time) - 5ft (1.5m), 14s period, SSE swell with 769 kJ wave energy.
- Next surfable swell (1★+): Wednesday 23 Sep, 6AM (local time) - 2ft (0.6m), 10s period with ENE swell.
Best Forecast Surf Conditions for Sosanji Rivermouth this week:
The surf forecast for Sosanji Rivermouth over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Wednesday (Sep 23) at 6AM. The primary swell is predicted to be 0.6m and 10s period with a secondary swell of 0.2m and 8s. Another secondary swell of 0.8m and 5s is also forecast. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Sosanji Rivermouth in the next 16 days are 1.5m 14s and forecast to arrive on Monday (Sep 28) at 9AM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.8m 6s period and expected on Tuesday (Sep 22) at 12AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6AM (Wed 23rd Sep) | 2ft (0.6m) 10s |
| Best Surf | 3AM (Mon 28th Sep) | 4.5ft (1.4m) 14s |
| Most Powerful | 9AM (Mon 28th Sep) | 5ft (1.5m) 14s |
Table - best surf conditions forecast for Sosanji Rivermouth over the next 16 days.
Short Range ForecastMostly dry. Warm (max 27°C on Mon afternoon, min 22°C on Tue night). Wind will be generally light. | Days 5-7 Weather SummarySome drizzle, heaviest during Fri night. Warm (max 27°C on Sat afternoon, min 24°C on Thu night). Wind will be generally light. | |||||||||||||||||||
Mon 21 | Tuesday 22 | Wednesday 23 | Thursday 24 | Friday 25 | Saturday 26 | Sunday 27 | ||||||||||||||
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) | E 12 | ENE 11 | E 10 | E 9 | E 9 | ENE 9 | ENE 7 | E 9 | E 9 | E 10 | E 9 | E 9 | E 9 | E 9 | SE 13 | SE 11 | SE 10 | SE 9 | SSE 12 | SSE 12 |
Wave Graph  | ||||||||||||||||||||
 kJ | 1344 | 622 | 194 | 109 | 56 | 59 | 20 | 15 | 16 | 7 | 15 | 14 | 14 | 14 | 27 | 61 | 79 | 65 | 299 | 393 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | cross | cross | cross-on | cross-on | cross-on | on | glassy | cross-on | on | glassy | cross-on | on | cross-on | glassy | cross | cross-off | cross-off | glassy | cross-off |
High Tide | 3:54PM1.81m | 2:29AM1.69m | 4:26PM1.92m | 3:39AM1.84m | 4:52PM2.01m | 4:29AM1.99m | 5:18PM2.08m | 5:12AM2.11m | 5:42PM2.13m | 5:51AM2.20m | 6:07PM2.16m | 6:28AM2.23m | 6:31PM2.18m | |||||||
Low Tide | 9:31PM1.32m | 9:26AM0.56m | 10:11PM1.12m | 10:14AM0.48m | 10:44PM0.92m | 10:54AM0.43m | 11:14PM0.73m | 11:28AM0.43m | 11:44PM0.55m | 12:01PM0.47m | 00:15AM0.41m | 12:32PM0.56m | 00:47AM0.31m | |||||||
 |  | | | |  | | | | |  | | |  | | | |  | |  | |
 | — | — | 6:01 | — | — | 6:01 | — | — | 6:01 | — | — | 6:03 | — | — | 6:03 | — | — | 6:03 | — | — |
 | 6:13 | — | — | 6:12 | — | — | 6:09 | — | — | 6:08 | — | — | 6:07 | — | — | 6:06 | — | — | 6:05 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | — | — | — | — | — | — |
Temp °C | 27 | 25 | 26 | 26 | 25 | 25 | 24 | 24 | 25 | 25 | 24 | 25 | 25 | 25 | 26 | 27 | 24 | 27 | 26 | 25 |
Feels °C | 29 | 25 | 24 | 24 | 25 | 26 | 26 | 28 | 27 | 27 | 27 | 26 | 27 | 28 | 29 | 27 | 26 | 30 | 30 | 28 |
Swell 1 Height (m) Direction Period (s) | E 12 | ENE 11 | E 10 | E 9 | E 9 | ENE 9 | ENE 7 | E 9 | E 9 | E 10 | E 9 | E 9 | ENE 6 | ESE 4 | ESE 5 | SE 11 | SE 10 | SE 9 | SSE 12 | SSE 12 |
| kJ | 1344 | 622 | 194 | 109 | 56 | 59 | 20 | 15 | 16 | 7 | 15 | 14 | 7 | 5 | 9 | 61 | 79 | 65 | 299 | 393 |
Swell 2 Height (m) Direction Period (s) | S 8 | S 8 | NE 6 | S 8 | NE 5 | S 8 | ESE 9 | SE 4 | SE 8 | SE 8 | ENE 4 | E 6 | E 9 | E 9 | SE 13 | E 9 | E 8 | S 5 | E 8 | E 8 |
| kJ | 6 | 1 | 35 | 1 | 13 | 4 | 17 | 3 | 11 | 3 | 1 | 3 | 14 | 14 | 27 | 25 | 35 | 15 | 34 | 34 |
Swell 3 Height (m) Direction Period (s) | S 8 | — | S 8 | — | S 8 | SE 9 | SE 9 | ENE 5 | ESE 4 | S 7 | SE 8 | SE 8 | SSE 8 | ENE 6 | E 9 | ENE 5 | S 4 | E 8 | SE 14 | S 4 |
| kJ | 6 | — | 1 | — | 5 | 3 | 3 | 3 | 1 | 1 | 3 | 3 | 7 | 7 | 14 | 2 | 4 | 34 | 8 | 4 |
Wind waves Height (m) Direction Period (s) | NNE 7 | NNE 6 | NNE 6 | NE 6 | NNE 5 | NNE 5 | NNE 4 | NNE 4 | — | ENE 3 | NE 4 | NE 3 | ENE 4 | — | S 3 | SSE 3 | SSW 4 | SSW 5 | S 4 | SW 4 |
| kJ | 99 | 257 | 150 | 40 | 33 | 22 | 7 | 1 | — | 2 | 4 | 2 | 1 | — | 1 | 2 | 7 | 37 | 15 | 16 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 21 | 37 | 37 | 310 | 62 | 6 | 632 | 230 | 798 | 2331 | 230 | 230 | 2331 | 230 | 0 | 283 | 0 | 0 | 0 | 0 |
Best forecast wave conditions in Kyu Shu | ||||||||||||||||||||
Best forecast wave conditions in Japan | ||||||||||||||||||||
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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 Sosanji 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 Sosanji Rivermouth Surf forecast
The above surf forecast table for Sosanji Rivermouth provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Sosanji Rivermouth can be found by selecting the local surf guide option on the grey menu. Our Sosanji 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 (Sosanji 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 Sosanji 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.
Sosanji Rivermouth is 12 km (7 miles) from Miyazaki-shi. If you plan a holiday in Kyu Shu, look for hotels and other accommodation in Miyazaki-shi. Miyazaki-shi has rooms for a wide range of budgets as well as car hire and transport links.
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