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Surf Forecasts:
Niyodo Rivermouth surfForecast / Shikoku / Japan
48hr Weather and Surf, issued 2 am Tuesday 28 Apr 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
20.6° C
(Which is 1.0°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 3PM is: 0.2m 12s primary swell from a East-southeast direction and 0.3m 8s secondary swell from a East direction, 0.4m 4s secondary swell from a South-southwest direction (forecast issued at 02:00am April 28). The wind direction is predicted to be onshore.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (28 Apr) | 1ft (0.3m) | 12s |
| Afternoon (28 Apr) | 0.5ft (0.2m) | 12s |
| Evening (28 Apr) | 3ft (0.9m) | 5s |
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 45mm), heaviest during Thu night. Warm (max 21°C on Tue morning, min 13°C on Wed night). Wind will be generally light. | ||||||||||||||||||||||||
Tuesday 28 | Wednesday 29 | Thursday 30 | ||||||||||||||||||||||
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 |    |    |    | |||||||||||||||||||||
E 7 | E 7 | SE 12 | SE 12 | SE 12 | ESE 12 | ESE 12 | SSW 5 | SSW 5 | SSW 5 | SSW 6 | SSW 6 | SSW 6 | SSW 5 | SSW 5 | SSW 5 | E 10 | E 10 | E 10 | SE 11 | SE 11 | SE 9 | SE 9 | ESE 6 | |
38 | 39 | 27 | 23 | 23 | 14 | 14 | 39 | 28 | 30 | 34 | 27 | 18 | 16 | 9 | 2 | 8 | 7 | 7 | 18 | 18 | 12 | 20 | 65 | |
Wind (km/h) | ||||||||||||||||||||||||
off | off | glassy | glassy | on | on | glassy | glassy | off | off | off | off | glassy | cross-off | off | off | off | glassy | off | glassy | glassy | glassy | glassy | cross-off | |
High Tide | 3:59AM1.65m | 4:15PM1.62m | 4:25AM1.69m | 4:58PM1.70m | 4:49AM1.73m | 5:36PM1.75m | ||||||||||||||||||
Low Tide | 9:39PM0.57m | 10:10AM0.61m | 10:19PM0.59m | 10:42AM0.45m | 10:54PM0.63m | 11:11AM0.32m | ||||||||||||||||||
 | |  |  | | | |  |  | | | |  | | | | |  |  | | | | | | |
 | — | 5:20 | — | — | — | — | — | — | — | 5:18 | — | — | — | — | — | — | — | 5:18 | — | — | — | — | — | — |
 | — | — | — | — | — | — | 6:45 | — | — | — | — | — | — | — | 6:45 | — | — | — | — | — | — | — | 6:45 | — |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 5 | 4 | 3 | 4 | 2 | 4 | |
Temp °C | 17 | 16 | 16 | 20 | 21 | 21 | 21 | 19 | 18 | 17 | 16 | 19 | 21 | 20 | 15 | 16 | 16 | 14 | 13 | 14 | 14 | 15 | 16 | 16 |
17 | 15 | 16 | 21 | 21 | 22 | 23 | 20 | 18 | 16 | 15 | 18 | 20 | 19 | 13 | 14 | 14 | 13 | 13 | 15 | 15 | 16 | 17 | 15 | |
Swell 1 Height (m) Direction Period (s) | E 7 | E 7 | E 7 | ESE 7 | E 8 | E 8 | E 8 | SSW 5 | SSW 5 | SSW 5 | SSW 6 | SSW 6 | SSW 6 | SSW 5 | SSW 5 | SSW 5 | E 10 | ENE 5 | ENE 6 | E 9 | SE 11 | SE 9 | SE 9 | SE 9 |
 kJ | 38 | 39 | 27 | 18 | 18 | 10 | 10 | 18 | 28 | 30 | 34 | 27 | 18 | 16 | 9 | 2 | 8 | 3 | 6 | 7 | 18 | 12 | 20 | 12 |
Swell 2 Height (m) Direction Period (s) | SSW 5 | SW 5 | SSW 5 | SSW 5 | SSW 5 | ESE 12 | ESE 12 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 5 | E 5 | ENE 5 | ENE 5 | E 10 | E 10 | SE 11 | E 9 | E 9 | SSE 5 | E 9 |
| kJ | 11 | 7 | 5 | 5 | 2 | 14 | 14 | 10 | 10 | 5 | 5 | 5 | 4 | 2 | 2 | 2 | 3 | 7 | 7 | 18 | 7 | 6 | 4 | 6 |
Swell 3 Height (m) Direction Period (s) | SE 12 | ESE 12 | SE 12 | SE 12 | SE 12 | SE 6 | SSE 6 | ESE 12 | ESE 12 | ESE 11 | ESE 11 | SE 11 | E 4 | E 8 | E 8 | S 5 | S 4 | SE 11 | SE 11 | SE 6 | — | SSE 5 | E 9 | S 13 |
| kJ | 23 | 14 | 23 | 23 | 23 | 1 | 3 | 14 | 13 | 13 | 12 | 5 | 1 | 4 | 5 | 2 | 2 | 5 | 5 | 1 | — | 2 | 6 | 4 |
Wind waves Height (m) Direction Period (s) | E 3 | — | — | — | SSW 4 | SSW 4 | SSW 4 | SSW 5 | — | — | — | — | — | — | — | NNW 2 | NNW 2 | — | ENE 5 | E 4 | E 4 | E 4 | E 4 | ESE 6 |
| kJ | 1 | — | — | — | 5 | 6 | 11 | 39 | — | — | — | — | — | — | — | 1 | 1 | — | 14 | 11 | 17 | 7 | 14 | 65 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 233 | 283 | 2320 | 229 | 0 | 0 | 29 | 0 | 566 | 539 | 539 | 539 | 1041 | 302 | 302 | 1041 | 907 | 573 | 993 | 85 | 0 |
Best forecast wave conditions in Shikoku | ||||||||||||||||||||||||
Best forecast wave conditions in Japan | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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