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Surf Forecasts:
Niyodo Rivermouth surfForecast / Shikoku / Japan
48hr Weather and Surf, issued 2 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 9PM is: 1.5m 8s primary swell from a East-southeast direction and 0.1m 6s secondary swell from a South direction (forecast issued at 02:00pm May 25). The wind direction is predicted to be glassy and the swell rating is 2.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (25 May) | - | - |
| Afternoon (25 May) | 5ft (1.6m) | 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 77mm), heaviest during Wed night. Warm (max 24°C on Thu morning, min 19°C on Mon night). Wind will be generally light. | ||||||||||||||||||||||||
Mon 25 | Tuesday 26 | Wednesday 27 | Thu 28 | |||||||||||||||||||||
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 9 | ESE 9 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 8 | ESE 5 | ESE 6 | ESE 6 | SSW 8 | SSW 8 | SSW 8 | |
371 | 349 | 341 | 293 | 240 | 202 | 171 | 171 | 176 | 201 | 77 | 83 | 185 | 162 | 193 | 188 | 162 | 171 | 88 | 163 | 216 | 557 | 618 | 536 | |
Wind (km/h) | ||||||||||||||||||||||||
on | cross-on | on | glassy | glassy | off | cross-off | glassy | on | cross-on | cross-on | cross-on | glassy | cross-off | glassy | cross-on | cross-on | cross | cross | cross-off | cross-off | cross | cross-off | glassy | |
High Tide | 1:48PM1.38m | 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 | |||||||||||||||||||
 |  | |  | | | | | |  |  |  | | | | |  | | |  | |  | | | |
 | — | — | — | — | — | 4:58 | — | — | — | — | — | — | — | 4:58 | — | — | — | — | — | — | — | 4:58 | — | — |
 | — | — | 7:05 | — | — | — | — | — | — | — | 7:05 | — | — | — | — | — | — | — | 7:06 | — | — | — | — | 7:07 |
— | — | — | — | — | — | — | — | — | 1 | 1 | 1 | 1 | 2 | 2 | 4 | 7 | 8 | 10 | 14 | 16 | 8 | 2 | — | |
Temp °C | 22 | 22 | 22 | 21 | 20 | 19 | 19 | 23 | 23 | 23 | 22 | 22 | 21 | 21 | 20 | 21 | 20 | 19 | 20 | 20 | 20 | 22 | 22 | 23 |
23 | 23 | 24 | 23 | 22 | 20 | 20 | 25 | 23 | 23 | 23 | 24 | 23 | 23 | 22 | 23 | 21 | 20 | 21 | 21 | 21 | 23 | 25 | 27 | |
Swell 1 Height (m) Direction Period (s) | ESE 9 | ESE 9 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | SSE 6 | SE 15 | SE 15 | ESE 8 | ESE 8 | ESE 8 | ESE 9 | ESE 9 | ESE 15 | ESE 9 | SE 10 | ESE 14 | SSW 6 | SSW 6 | SSW 7 | SSW 8 | S 8 |
 kJ | 371 | 349 | 341 | 293 | 240 | 202 | 171 | 3 | 9 | 9 | 77 | 83 | 185 | 162 | 193 | 21 | 162 | 17 | 20 | 10 | 45 | 261 | 356 | 337 |
Swell 2 Height (m) Direction Period (s) | E 16 | SW 6 | SW 6 | S 6 | S 6 | S 6 | S 6 | E 12 | E 12 | E 12 | ESE 15 | SE 15 | SE 15 | ESE 10 | SE 15 | SE 11 | SE 11 | ESE 14 | SW 6 | ESE 14 | ESE 14 | ESE 6 | ESE 7 | ESE 6 |
| kJ | 5 | 2 | 1 | 1 | 7 | 3 | 3 | 3 | 3 | 3 | 22 | 9 | 9 | 11 | 9 | 5 | 5 | 21 | 2 | 19 | 19 | 156 | 96 | 55 |
Swell 3 Height (m) Direction Period (s) | — | E 16 | E 16 | E 16 | E 16 | E 16 | E 13 | E 16 | SE 12 | SE 12 | SE 12 | SE 15 | S 11 | SE 15 | SE 15 | SE 11 | ESE 15 | ESE 14 | — | — | ESE 14 | SE 10 | SE 10 | ESE 10 |
| kJ | — | 5 | 5 | 5 | 5 | 5 | 3 | 5 | 6 | 6 | 6 | 9 | 2 | 9 | 9 | 5 | 21 | 20 | — | — | 19 | 16 | 25 | 19 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | ESE 8 | ESE 8 | ESE 8 | ESE 6 | ESE 6 | — | — | — | ESE 9 | — | ESE 8 | ESE 5 | ESE 6 | ESE 6 | SSW 8 | SSW 8 | SSW 8 |
| kJ | — | — | — | — | — | — | — | 171 | 176 | 201 | 55 | 47 | — | — | — | 188 | — | 171 | 88 | 163 | 216 | 557 | 618 | 536 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 432 | 539 | 58 | 0 | 0 | 0 | 0 | 0 | 29 | 330 | 29 | 29 | 0 | 0 | 0 | 29 | 58 | 29 | 253 | 0 | 0 | 183 | 0 | 0 |
Best forecast wave conditions in Shikoku | ||||||||||||||||||||||||
Best forecast wave conditions in Japan | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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