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Surf Forecasts:
Niyodo Rivermouth surfForecast / Shikoku / Japan
48hr Weather and Surf, issued 2 am 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
22.1° C
(Which is slightly warmer than usual)How big are the waves at Niyodo Rivermouth today?
The current surf forecast for Niyodo Rivermouth at 8AM is: 1.9m 9s primary swell from a East direction and 1.7m 9s secondary swell from a East-southeast direction, 0.2m 7s secondary swell from a South-southwest direction (forecast issued at 02:00am May 25). The wind direction is predicted to be glassy and the swell rating is 3.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (25 May) | 6ft (1.9m) | 9s |
| Afternoon (25 May) | 6ft (1.8m) | 9s |
| Evening (25 May) | 5ft (1.5m) | 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 46mm), heaviest during Wed night. Warm (max 24°C on Tue morning, min 19°C on Mon night). Wind will be generally light. | ||||||||||||||||||||||||
Monday 25 | Tuesday 26 | Wednesday 27 | ||||||||||||||||||||||
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 | 6 PM | 9 PM | |
Swell Height Map |    |    |    | |||||||||||||||||||||
ESE 8 | E 8 | E 9 | E 9 | E 9 | E 9 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 6 | |
471 | 572 | 613 | 554 | 494 | 483 | 333 | 286 | 244 | 202 | 167 | 167 | 206 | 221 | 99 | 130 | 206 | 211 | 181 | 190 | 190 | 149 | 133 | 45 | |
Wind (km/h) | ||||||||||||||||||||||||
glassy | glassy | glassy | glassy | on | on | on | glassy | glassy | off | off | glassy | on | cross-on | cross-on | glassy | cross-off | glassy | glassy | glassy | on | cross-on | glassy | cross | |
High Tide | 1:37AM1.53m | 1:48PM1.38m | 2:21AM1.55m | 3:04PM1.44m | 2:57AM1.59m | 4:01PM1.52m | ||||||||||||||||||
Low Tide | 7:57AM0.84m | 7:54PM0.74m | 8:51AM0.68m | 8:51PM0.81m | 9:34AM0.53m | |||||||||||||||||||
 | |  |  | | | | | | | | | | |  |  |  | | | | |  | |  | |
 | — | 4:58 | — | — | — | — | — | — | — | 4:58 | — | — | — | — | — | — | — | 4:58 | — | — | — | — | — | — |
 | — | — | — | — | — | — | 7:05 | — | — | — | — | — | — | — | 7:05 | — | — | — | — | — | — | — | 7:06 | — |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 1 | — | — | — | — | — | 1 | 3 | 4 | |
Temp °C | 21 | 20 | 20 | 22 | 23 | 23 | 22 | 21 | 20 | 19 | 19 | 23 | 24 | 24 | 23 | 22 | 20 | 21 | 21 | 23 | 23 | 23 | 21 | 20 |
23 | 22 | 22 | 24 | 24 | 24 | 24 | 23 | 22 | 20 | 20 | 25 | 25 | 24 | 24 | 24 | 21 | 23 | 23 | 26 | 25 | 26 | 24 | 22 | |
Swell 1 Height (m) Direction Period (s) | SSW 8 | ESE 8 | ESE 9 | ESE 9 | ESE 9 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | SE 15 | SE 15 | ESE 8 | ESE 8 | SE 15 | SE 15 | SE 15 | ESE 15 | ESE 11 | ESE 8 | ESE 8 | ESE 6 |
 kJ | 19 | 434 | 408 | 427 | 363 | 341 | 333 | 286 | 244 | 202 | 167 | 167 | 9 | 9 | 99 | 130 | 9 | 9 | 9 | 21 | 11 | 149 | 133 | 41 |
Swell 2 Height (m) Direction Period (s) | — | SSW 8 | SSW 7 | SSW 7 | SSW 6 | SW 6 | SW 6 | S 6 | E 16 | S 6 | S 6 | E 12 | E 12 | E 12 | ESE 15 | SE 15 | S 11 | SE 11 | SE 15 | ESE 15 | ESE 15 | SE 11 | SE 10 | E 8 |
| kJ | — | 19 | 5 | 4 | 4 | 2 | 1 | 1 | 5 | 3 | 3 | 3 | 3 | 3 | 22 | 9 | 2 | 5 | 8 | 21 | 21 | 18 | 17 | 45 |
Swell 3 Height (m) Direction Period (s) | — | SSE 7 | — | — | E 16 | E 16 | E 16 | E 16 | E 16 | E 16 | E 13 | E 16 | SE 12 | SE 12 | SE 12 | — | SE 15 | — | — | — | — | ESE 14 | ESE 14 | SE 10 |
| kJ | — | 9 | — | — | 5 | 5 | 5 | 5 | 5 | 5 | 3 | 5 | 6 | 6 | 6 | — | 9 | — | — | — | — | 21 | 20 | 17 |
Wind waves Height (m) Direction Period (s) | ESE 8 | E 8 | E 9 | E 9 | E 9 | E 9 | — | — | — | — | — | — | ESE 8 | ESE 8 | ESE 6 | E 6 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | — | — | S 3 |
| kJ | 471 | 572 | 613 | 554 | 494 | 483 | — | — | — | — | — | — | 206 | 221 | 69 | 41 | 206 | 211 | 181 | 190 | 190 | — | — | 3 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 0 | 58 | 522 | 9 | 0 | 0 | 0 | 0 | 0 | 82 | 539 | 82 | 0 | 0 | 0 | 0 | 0 | 432 | 58 | 0 | 29 |
Best forecast wave conditions in Shikoku | ||||||||||||||||||||||||
Best forecast wave conditions in Japan | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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