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Surf Forecasts:
Niyodo Rivermouth surfForecast / Shikoku / Japan
48hr Weather and Surf, issued 2 pm Saturday 23 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
22.5° C
(Which is 1.1°C warmer than normal for this time of year)How big are the waves at Niyodo Rivermouth today?
The current surf forecast for Niyodo Rivermouth at 8PM is: 2.2m 9s primary swell from a East direction and 0.9m 6s secondary swell from a South-southeast direction (forecast issued at 02:00pm May 23). The wind direction is predicted to be cross-offshore and the swell rating is 3.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (23 May) | - | - |
| Afternoon (23 May) | 8ft (2.5m) | 8s |
| Evening (23 May) | 7ft (2.1m) | 9s |
Table - waves today at Niyodo Rivermouth. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastLight rain (total 8mm), mostly falling on Sat afternoon. Warm (max 23°C on Sun morning, min 19°C on Mon night). Wind will be generally light. | ||||||||||||||||||||||||
Sat 23 | Sunday 24 | Monday 25 | Tue 26 | |||||||||||||||||||||
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 | 6 PM | 9 PM | 12 AM | 3 AM | 6 AM | 9 AM | |
Swell Height Map |    |    |    |    | ||||||||||||||||||||
ESE 8 | ESE 8 | ESE 9 | E 9 | ESE 9 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | E 8 | E 8 | E 9 | E 9 | E 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 8 | ESE 8 | E 8 | E 8 | |
908 | 1024 | 1023 | 683 | 744 | 666 | 702 | 727 | 686 | 629 | 509 | 608 | 552 | 529 | 554 | 509 | 374 | 322 | 315 | 268 | 262 | 217 | 210 | 177 | |
Wind (km/h) | ||||||||||||||||||||||||
cross-on | cross | cross | cross-off | cross | cross-off | cross | cross | on | on | on | glassy | glassy | glassy | glassy | on | on | on | glassy | glassy | glassy | glassy | glassy | glassy | |
High Tide | 00:43AM1.51m | 12:10PM1.37m | 1:37AM1.53m | 1:48PM1.38m | 2:21AM1.55m | |||||||||||||||||||
Low Tide | 5:32PM0.52m | 6:43AM0.98m | 6:45PM0.65m | 7:57AM0.84m | 7:54PM0.74m | 8:51AM0.68m | ||||||||||||||||||
 |  | |  | | | |  | | |  |  | |  | |  | | | | | | | | | |
 | — | — | — | — | — | 4:58 | — | — | — | — | — | — | — | 4:58 | — | — | — | — | — | — | — | 4:58 | — | — |
 | — | — | 7:02 | — | — | — | — | — | — | — | 7:04 | — | — | — | — | — | — | — | 7:05 | — | — | — | — | 7:05 |
3 | 2 | 1 | 1 | 2 | 1 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Temp °C | 21 | 21 | 21 | 20 | 21 | 21 | 21 | 21 | 23 | 22 | 22 | 21 | 20 | 20 | 20 | 23 | 23 | 23 | 22 | 21 | 20 | 19 | 19 | 23 |
19 | 20 | 22 | 22 | 23 | 23 | 23 | 22 | 24 | 23 | 24 | 23 | 22 | 22 | 22 | 25 | 24 | 24 | 24 | 23 | 22 | 21 | 21 | 25 | |
Swell 1 Height (m) Direction Period (s) | — | — | ESE 9 | SSE 6 | — | — | — | — | SW 7 | SSW 7 | SSW 6 | ESE 8 | ESE 8 | ESE 8 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 8 | ESE 8 | E 8 | E 8 |
 kJ | — | — | 1023 | 60 | — | — | — | — | 2 | 4 | 8 | 460 | 414 | 376 | 358 | 374 | 374 | 322 | 315 | 268 | 262 | 217 | 210 | 177 |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | SSW 8 | SSW 8 | SSW 8 | SSW 7 | SSE 7 | SSW 6 | E 16 | E 16 | E 16 | E 16 | S 6 | S 6 | SSE 6 |
| kJ | — | — | — | — | — | — | — | — | — | — | — | 6 | 20 | 19 | 10 | 9 | 4 | 5 | 5 | 5 | 5 | 7 | 7 | 7 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | SSW 6 | — | SSE 6 | SSE 7 | SSW 6 | — | E 16 | — | E 16 | E 16 | E 16 | E 16 | E 12 |
| kJ | — | — | — | — | — | — | — | — | — | — | — | 4 | — | 8 | 9 | 4 | — | 5 | — | 5 | 5 | 5 | 5 | 3 |
Wind waves Height (m) Direction Period (s) | ESE 8 | ESE 8 | — | E 9 | ESE 9 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | E 8 | E 8 | E 9 | E 9 | E 9 | — | — | — | — | — | — | — | — |
| kJ | 908 | 1024 | — | 683 | 744 | 666 | 702 | 727 | 686 | 629 | 509 | 608 | 552 | 529 | 554 | 509 | — | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 330 | 642 | 29 | 0 | 29 | 0 | 183 | 183 | 82 | 29 | 9 | 0 | 0 | 0 | 0 | 344 | 58 | 58 | 0 | 0 | 0 | 0 | 0 | 0 |
Best forecast wave conditions in Shikoku | ||||||||||||||||||||||||
Best forecast wave conditions in Japan | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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