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Surf Forecasts:
Niyodo Rivermouth surfForecast / Shikoku / Japan
48hr Weather and Surf, issued 2 am Thursday 23 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
19.6° C
(Which is normal for this time of year)How big are the waves at Niyodo Rivermouth today?
The current surf forecast for Niyodo Rivermouth at 5AM is: 1.0m 10s primary swell from a East direction and 0.4m 13s secondary swell from a Southeast direction, 0.4m 13s secondary swell from a Southeast direction (forecast issued at 02:00am April 23). The wind direction is predicted to be cross-offshore and the swell rating is 2.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (23 Apr) | 5ft (1.5m) | 5s |
| Afternoon (23 Apr) | 4.5ft (1.3m) | 7s |
| Evening (23 Apr) | 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 48mm), heaviest during Thu morning. Very mild (max 18°C on Sat afternoon, min 11°C on Fri night). Wind will be generally light. | ||||||||||||||||||||||||
Thursday 23 | Friday 24 | Saturday 25 | ||||||||||||||||||||||
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 10 | E 10 | E 10 | E 5 | E 5 | SSW 7 | S 8 | S 8 | SSW 8 | SSW 8 | SSW 8 | SSW 8 | SSW 8 | SSW 8 | SSW 8 | E 9 | E 8 | E 8 | ESE 8 | E 9 | ESE 9 | ESE 9 | ESE 10 | ESE 9 | |
130 | 127 | 188 | 98 | 136 | 161 | 324 | 301 | 218 | 178 | 155 | 133 | 101 | 77 | 23 | 80 | 291 | 387 | 264 | 393 | 660 | 993 | 1157 | 1168 | |
Wind (km/h) | ||||||||||||||||||||||||
glassy | off | off | cross-off | off | off | off | off | off | off | off | cross-off | off | glassy | off | off | off | glassy | glassy | glassy | glassy | cross-on | cross | cross-off | |
High Tide | 10:40PM1.50m | 8:57AM1.58m | 00:20AM1.44m | 10:13AM1.44m | 1:56AM1.46m | 12:24PM1.36m | ||||||||||||||||||
Low Tide | 3:33AM1.15m | 4:34PM0.39m | 5:12AM1.22m | 6:06PM0.51m | 7:33AM1.14m | 7:39PM0.55m | ||||||||||||||||||
 |  |  |  | | |  | | | |  | | | | | | | | | | | | |  | |
 | — | 5:26 | — | — | — | — | — | — | — | 5:24 | — | — | — | — | — | — | — | 5:24 | — | — | — | — | — | — |
 | — | — | — | — | — | — | 6:40 | — | — | — | — | — | — | — | 6:42 | — | — | — | — | — | — | — | 6:42 | — |
— | 1 | 8 | 11 | 14 | 9 | 2 | — | — | — | — | — | — | — | 4 | 2 | 2 | — | 1 | 1 | — | — | — | — | |
Temp °C | 17 | 15 | 13 | 14 | 15 | 15 | 15 | 14 | 14 | 14 | 14 | 14 | 15 | 14 | 12 | 11 | 11 | 13 | 13 | 15 | 17 | 18 | 17 | 15 |
17 | 13 | 11 | 13 | 14 | 14 | 14 | 13 | 13 | 13 | 13 | 12 | 12 | 13 | 10 | 9 | 8 | 12 | 12 | 15 | 16 | 17 | 15 | 13 | |
Swell 1 Height (m) Direction Period (s) | E 10 | E 10 | SE 13 | SE 13 | S 6 | SSW 7 | S 8 | S 8 | SSW 8 | SSW 8 | SSW 8 | SSW 8 | SSW 8 | SSW 8 | E 7 | E 9 | E 9 | E 8 | ESE 8 | S 6 | S 6 | — | — | — |
 kJ | 130 | 127 | 61 | 84 | 52 | 161 | 324 | 301 | 218 | 178 | 155 | 133 | 101 | 77 | 28 | 80 | 150 | 186 | 264 | 7 | 3 | — | — | — |
Swell 2 Height (m) Direction Period (s) | SE 13 | SE 13 | — | S 5 | SE 13 | E 10 | E 7 | E 7 | E 6 | E 7 | E 8 | E 7 | E 7 | E 7 | E 5 | S 7 | S 7 | S 7 | S 7 | SE 12 | SE 15 | — | — | — |
| kJ | 87 | 61 | — | 4 | 84 | 65 | 247 | 131 | 54 | 38 | 55 | 39 | 51 | 38 | 13 | 26 | 24 | 15 | 8 | 6 | 8 | — | — | — |
Swell 3 Height (m) Direction Period (s) | SE 11 | E 4 | — | — | SE 13 | SE 13 | SE 13 | SE 13 | SE 13 | SE 13 | SE 12 | E 9 | E 9 | E 5 | SSW 8 | SSW 7 | SE 12 | SE 12 | ESE 12 | SE 14 | — | — | — | — |
| kJ | 5 | 1 | — | — | 84 | 61 | 60 | 60 | 42 | 41 | 39 | 27 | 27 | 11 | 23 | 21 | 23 | 36 | 14 | 8 | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | E 10 | E 5 | E 5 | E 6 | ENE 7 | — | NE 6 | NE 6 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 9 | E 8 | E 8 | — | E 9 | ESE 9 | ESE 9 | ESE 10 | ESE 9 |
| kJ | — | — | 188 | 98 | 136 | 181 | 254 | — | 124 | 82 | 183 | 250 | 172 | 86 | 162 | 243 | 291 | 387 | — | 393 | 660 | 993 | 1157 | 1168 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 224 | 29 | 0 | 0 | 0 | 0 | 0 | 0 | 103 | 243 |
Best forecast wave conditions in Shikoku | ||||||||||||||||||||||||
Best forecast wave conditions in Japan | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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