- Forecast
- Maps
- Live
- Weather State
- Spot Information
Surf Forecasts:
Niyodo Rivermouth surfForecast / Shikoku / Japan
48hr Weather and Surf, issued 8 pm Monday 25 May 2026 JSTForecast update in hr min s Forecast update imminent
Niyodo Rivermouth surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Niyodo Rivermouth sea temperature is
22.0° C
(Which is slightly warmer than usual)How big are the waves at Niyodo Rivermouth today?
The current surf forecast for Niyodo Rivermouth at 3AM is: 1.2m 8s primary swell from a East-southeast direction and 0.3m 6s secondary swell from a South direction (forecast issued at 08:00pm May 25). The wind direction is predicted to be offshore and the swell rating is 2.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (26 May) | 3.5ft (1.1m) | 8s |
| Afternoon (26 May) | 4.5ft (1.3m) | 8s |
| Evening (26 May) | 3ft (0.9m) | 8s |
Table - waves today at Niyodo Rivermouth. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastHeavy rain (total 49mm), heaviest during Wed afternoon. Warm (max 24°C on Thu afternoon, min 19°C on Mon night). Wind will be generally light. | ||||||||||||||||||||||||
Mon 25 | Tuesday 26 | Wednesday 27 | Thursday 28 | |||||||||||||||||||||
6 PM | 9 PM | 12 AM | 3 AM | 6 AM | 9 AM | 12 PM | 3 PM | 6 PM | 9 PM | 12 AM | 3 AM | 6 AM | 9 AM | 12 PM | 3 PM | 6 PM | 9 PM | 12 AM | 3 AM | 6 AM | 9 AM | 12 PM | 3 PM | |
Swell Height Map |   |    |    |    | ||||||||||||||||||||
ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 7 | ESE 8 | ESE 8 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 8 | ESE 8 | ESE 5 | ESE 5 | ESE 6 | SSE 7 | S 7 | SW 7 | SSW 7 | |
300 | 293 | 240 | 202 | 171 | 171 | 206 | 201 | 158 | 94 | 190 | 208 | 188 | 166 | 176 | 160 | 188 | 95 | 149 | 204 | 366 | 239 | 261 | 127 | |
Wind (km/h) | ||||||||||||||||||||||||
on | glassy | glassy | off | off | glassy | on | cross-on | cross-on | cross-on | cross | glassy | glassy | cross | cross-on | on | cross-on | cross | cross-off | cross-off | cross | glassy | glassy | on | |
High Tide | 2:21AM1.55m | 3:04PM1.44m | 2:57AM1.59m | 4:01PM1.52m | 3:30AM1.62m | |||||||||||||||||||
Low Tide | 7:54PM0.74m | 8:51AM0.68m | 8:51PM0.81m | 9:34AM0.53m | 9:39PM0.85m | 10:10AM0.40m | ||||||||||||||||||
 |  | | |  | | | |  |  |  |  | |  | | |  |  | | | | | | | |
 | — | — | — | 4:58 | — | — | — | — | — | — | — | 4:58 | — | — | — | — | — | — | — | 4:58 | — | — | — | — |
 | 7:05 | — | — | — | — | — | — | — | 7:05 | — | — | — | — | — | — | — | 7:06 | — | — | — | — | — | — | 7:07 |
— | — | — | — | — | — | — | — | 1 | 1 | 1 | — | — | 1 | 1 | 4 | 9 | 7 | 5 | 8 | 9 | 2 | — | — | |
Temp °C | 22 | 21 | 20 | 19 | 19 | 23 | 23 | 23 | 23 | 22 | 21 | 21 | 21 | 21 | 21 | 20 | 20 | 19 | 19 | 20 | 21 | 23 | 23 | 24 |
24 | 23 | 22 | 20 | 20 | 24 | 23 | 23 | 24 | 23 | 23 | 23 | 23 | 23 | 22 | 21 | 21 | 20 | 20 | 21 | 23 | 27 | 27 | 28 | |
Swell 1 Height (m) Direction Period (s) | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | SE 15 | SE 15 | ESE 7 | ESE 8 | ESE 8 | ESE 9 | ESE 9 | ESE 15 | SE 11 | SE 10 | SE 10 | SSW 5 | S 6 | SSW 7 | SSE 7 | S 7 | SSW 7 | SSW 7 |
 kJ | 300 | 293 | 240 | 202 | 171 | 171 | 9 | 9 | 158 | 94 | 190 | 208 | 188 | 21 | 5 | 17 | 26 | 4 | 18 | 91 | 336 | 239 | 124 | 127 |
Swell 2 Height (m) Direction Period (s) | SW 6 | S 6 | S 6 | S 6 | SSE 6 | SSE 6 | E 12 | E 12 | ESE 15 | SE 15 | SE 15 | SE 15 | SE 15 | ESE 10 | ESE 15 | ESE 14 | ESE 14 | ESE 14 | ESE 14 | SE 10 | E 8 | E 7 | SSE 6 | SE 6 |
| kJ | 1 | 1 | 7 | 7 | 8 | 3 | 3 | 3 | 22 | 9 | 9 | 9 | 9 | 10 | 21 | 21 | 20 | 19 | 19 | 16 | 37 | 112 | 74 | 59 |
Swell 3 Height (m) Direction Period (s) | E 16 | E 16 | E 16 | E 16 | E 13 | E 12 | SE 12 | SE 12 | SE 12 | — | S 11 | SE 11 | — | SE 11 | SE 10 | — | SW 6 | SW 6 | — | ESE 14 | SE 10 | SE 10 | E 8 | E 8 |
| kJ | 5 | 5 | 5 | 5 | 3 | 3 | 6 | 6 | 6 | — | 2 | 5 | — | 5 | 4 | — | 2 | 2 | — | 19 | 16 | 16 | 76 | 63 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | ESE 8 | ESE 8 | ESE 6 | ESE 6 | E 5 | — | — | ESE 9 | ESE 9 | ESE 8 | ESE 8 | ESE 5 | ESE 5 | ESE 6 | S 7 | SSW 7 | SW 7 | — |
| kJ | — | — | — | — | — | — | 206 | 201 | 82 | 43 | 20 | — | — | 166 | 176 | 160 | 188 | 95 | 149 | 204 | 366 | 209 | 261 | — |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 58 | 0 | 0 | 0 | 0 | 0 | 82 | 432 | 29 | 29 | 29 | 0 | 0 | 29 | 29 | 58 | 29 | 224 | 0 | 0 | 183 | 0 | 0 | 51 |
Best forecast wave conditions in Shikoku | ||||||||||||||||||||||||
Best forecast wave conditions in Japan | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
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 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.
Nearest