Surf Forecasts:
Niyodo Rivermouth surf forecast from 9 Jun 2026:
- Best quality surf: Monday 15 Jun, 6PM (local time) - 7.5ft (2.3m), 9s period, E swell with glassy winds.
- Most powerful swell: Monday 15 Jun, 6PM (local time) - 7.5ft (2.3m), 9s period, E swell with 798 kJ wave energy.
- Next surfable swell (1★+): Tuesday 9 Jun, 6PM (local time) - 3ft (0.9m), 8s period with SSW swell.
Best Forecast Surf Conditions for Niyodo Rivermouth this week:
The surf forecast for Niyodo Rivermouth over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Tuesday (Jun 09) at 6PM. The primary swell is predicted to be 0.9m and 8s period with a secondary swell of 0.3m and 8s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Niyodo Rivermouth in the next 16 days are 2.3m 9s and forecast to arrive on Monday (Jun 15) at 6PM. Winds are predicted to be glassy at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.2m 7s period and expected on Monday (Jun 15) at 9AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6PM (Tue 9th Jun) | 3ft (0.9m) 8s |
| Best Surf | 6PM (Mon 15th Jun) | 7.5ft (2.3m) 9s |
| Most Powerful | 6PM (Mon 15th Jun) | 7.5ft (2.3m) 9s |
Table - best surf conditions forecast for Niyodo Rivermouth over the next 16 days.
Updates in hr min s Forecast update imminent
Short Range ForecastLight rain (total 5mm), mostly falling on Tue afternoon. Warm (max 23°C on Wed morning, min 18°C on Tue night). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 8mm), mostly falling on Sun morning. Warm (max 24°C on Fri morning, min 18°C on Sun night). Wind will be generally light. | ||||||||||||||||||||
Tuesday 9 | Wednesday 10 | Thursday 11 | Friday 12 | Saturday 13 | Sunday 14 | Monday 15 | |||||||||||||||
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) | S 8 | S 8 | S 9 | SSW 8 | SSW 8 | S 9 | S 9 | S 8 | S 8 | S 8 | S 8 | S 7 | S 7 | SSE 6 | SSE 6 | ESE 8 | SE 4 | SE 6 | ESE 7 | E 8 | E 9 |
Wave Graph  | |||||||||||||||||||||
 kJ | 100 | 118 | 190 | 147 | 112 | 230 | 186 | 135 | 136 | 105 | 29 | 50 | 22 | 13 | 14 | 28 | 39 | 133 | 180 | 430 | 690 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | glassy | glassy | glassy | on | off | glassy | on | off | glassy | cross-on | off | glassy | on | cross-off | cross | cross | cross | glassy | cross-on | glassy |
High Tide | 12:18PM1.35m | 1:00AM1.58m | 1:50PM1.40m | 1:49AM1.62m | 3:08PM1.51m | 2:37AM1.67m | 4:13PM1.64m | 3:24AM1.73m | 5:10PM1.75m | 4:11AM1.78m | 6:03PM1.83m | 4:58AM1.83m | 6:53PM1.86m | ||||||||
Low Tide | 6:22PM0.73m | 7:37AM0.68m | 7:33PM0.81m | 8:35AM0.50m | 8:41PM0.87m | 9:27AM0.31m | 9:43PM0.90m | 10:17AM0.13m | 10:39PM0.93m | 11:06AM-0.01m | 11:31PM0.95m | 11:55AM-0.10m | 00:19AM0.96m | ||||||||
 |  |  |  | |  |  |  |  | | | | | |  | | | | | | | |
 | 4:54 | — | — | 4:54 | — | — | 4:54 | — | — | 4:54 | — | — | 4:54 | — | — | 4:54 | — | — | 4:54 | — | — |
 | — | 7:13 | — | — | 7:14 | — | — | 7:14 | — | — | 7:15 | — | — | 7:15 | — | — | 7:15 | — | — | 7:15 | — |
mm | — | 1 | 2 | — | — | — | — | 1 | 1 | — | — | — | — | — | — | 2 | 1 | 5 | — | — | — |
Temp °C | 22 | 20 | 19 | 23 | 23 | 20 | 23 | 23 | 20 | 24 | 24 | 21 | 24 | 24 | 21 | 22 | 22 | 19 | 22 | 23 | 21 |
Feels °C | 23 | 21 | 20 | 23 | 23 | 21 | 23 | 24 | 21 | 23 | 24 | 22 | 24 | 25 | 23 | 23 | 20 | 17 | 24 | 23 | 23 |
Swell 1 Height (m) Direction Period (s) | S 8 | S 8 | S 9 | SSW 8 | SSW 8 | S 9 | S 9 | S 8 | S 8 | S 8 | S 8 | S 7 | S 7 | SSE 6 | SSE 6 | S 6 | E 9 | E 15 | ESE 7 | ESE 8 | E 9 |
| kJ | 100 | 118 | 190 | 147 | 112 | 230 | 186 | 135 | 136 | 105 | 29 | 50 | 22 | 13 | 14 | 7 | 13 | 4 | 180 | 283 | 690 |
Swell 2 Height (m) Direction Period (s) | E 8 | E 8 | E 10 | E 9 | E 9 | E 9 | E 8 | E 9 | E 7 | E 7 | SSE 7 | E 8 | E 8 | E 7 | E 8 | ESE 9 | ESE 9 | SE 13 | ESE 15 | SE 15 | S 7 |
| kJ | 29 | 12 | 17 | 6 | 6 | 6 | 5 | 1 | 4 | 4 | 19 | 4 | 11 | 9 | 5 | 8 | 9 | 6 | 21 | 8 | 23 |
Swell 3 Height (m) Direction Period (s) | E 12 | E 10 | SE 9 | SE 9 | SE 9 | SE 5 | — | E 15 | SE 10 | SE 9 | SW 8 | SE 9 | SSW 7 | SSW 7 | ESE 10 | E 11 | SE 13 | E 10 | SE 12 | SE 12 | — |
| kJ | 11 | 8 | 3 | 3 | 3 | 1 | — | 4 | 4 | 3 | 17 | 3 | 5 | 5 | 9 | 2 | 7 | 2 | 6 | 6 | — |
Wind waves Height (m) Direction Period (s) | — | — | SW 3 | — | — | — | — | — | SSW 3 | — | — | — | — | — | — | ESE 8 | SE 4 | SE 6 | ENE 7 | E 8 | — |
| kJ | — | — | 3 | — | — | — | — | — | 1 | — | — | — | — | — | — | 28 | 39 | 133 | 164 | 430 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 0 | 51 | 0 | 0 | 51 | 0 | 0 | 85 | 0 | 432 | 645 | 432 | 1479 | 539 | 653 | 0 | 58 | 0 |
Best forecast wave conditions in Shikoku | |||||||||||||||||||||
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 Niyodo 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 Niyodo Rivermouth Surf forecast
The above surf forecast table for Niyodo Rivermouth provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Niyodo Rivermouth can be found by selecting the local surf guide option on the grey menu. Our Niyodo 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 (Niyodo 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 Niyodo 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.
Niyodo Rivermouth is 15 km (9 miles) from Kochi. If you plan a holiday in Shikoku, look for hotels and other accommodation in Kochi. Kochi has rooms for a wide range of budgets as well as car hire and transport links.
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