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Surf Forecasts:
Niyodo Rivermouth surfForecast / Shikoku / Japan
48hr Weather and Surf, issued 8 am Sunday 17 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
21.0° 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 2PM is: 0.9m 9s primary swell from a East-southeast direction and 0.1m 10s secondary swell from a Southeast direction (forecast issued at 08:00am May 17). The wind direction is predicted to be onshore.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (17 May) | 3ft (0.9m) | 8s |
| Afternoon (17 May) | 3ft (0.9m) | 9s |
| Evening (17 May) | 3ft (0.9m) | 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 3mm), mostly falling on Tue night. Warm (max 24°C on Sun morning, min 17°C on Mon night). Wind will be generally light. | ||||||||||||||||||||||||
Sunday 17 | Monday 18 | Tuesday 19 | Wed 20 | |||||||||||||||||||||
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 | 12 AM | 3 AM | |
Swell Height Map |    |    |    |    | ||||||||||||||||||||
ESE 8 | ESE 8 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 8 | ESE 8 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | |
127 | 127 | 131 | 106 | 106 | 108 | 111 | 88 | 92 | 84 | 113 | 113 | 113 | 103 | 99 | 99 | 96 | 70 | 154 | 154 | 175 | 170 | 166 | 166 | |
Wind (km/h) | ||||||||||||||||||||||||
off | glassy | on | cross-on | glassy | off | off | cross-off | off | glassy | on | on | glassy | glassy | off | off | cross-off | glassy | on | on | glassy | glassy | off | glassy | |
High Tide | 5:20AM1.87m | 6:51PM1.90m | 5:58AM1.88m | 7:41PM1.85m | 6:39AM1.85m | 8:34PM1.77m | ||||||||||||||||||
Low Tide | 12:04PM-0.07m | 00:25AM0.84m | 12:48PM-0.10m | 1:09AM0.92m | 1:36PM-0.06m | 1:54AM1.00m | ||||||||||||||||||
 | | | | |  | | | | | | | | | | | | | |  | |  | |  | |
 | 5:03 | — | — | — | — | — | — | 5:03 | — | — | — | — | — | — | — | 5:01 | — | — | — | — | — | — | — | 5:01 |
 | — | — | — | — | 6:59 | — | — | — | — | — | — | — | 7:00 | — | — | — | — | — | — | — | 7:00 | — | — | 7:00 |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | |
Temp °C | 18 | 23 | 24 | 23 | 22 | 20 | 19 | 18 | 19 | 23 | 24 | 24 | 22 | 20 | 19 | 18 | 17 | 22 | 23 | 23 | 21 | 20 | 20 | 20 |
18 | 23 | 23 | 23 | 24 | 21 | 18 | 17 | 19 | 23 | 23 | 24 | 24 | 22 | 20 | 19 | 17 | 22 | 23 | 24 | 24 | 22 | 21 | 22 | |
Swell 1 Height (m) Direction Period (s) | ESE 8 | ESE 8 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 8 | ESE 8 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 |
 kJ | 127 | 127 | 131 | 106 | 106 | 108 | 111 | 88 | 92 | 84 | 113 | 113 | 113 | 103 | 99 | 99 | 96 | 70 | 154 | 154 | 175 | 170 | 166 | 166 |
Swell 2 Height (m) Direction Period (s) | SE 10 | SE 10 | SE 10 | SE 10 | SE 12 | SE 11 | SE 12 | SE 12 | SE 12 | SE 12 | SE 12 | SE 12 | SE 10 | SE 12 | SE 11 | SE 11 | SE 11 | SE 10 | E 8 | E 9 | S 9 | SE 7 | SSE 7 | SSE 7 |
| kJ | 17 | 16 | 4 | 4 | 24 | 19 | 23 | 23 | 23 | 23 | 23 | 6 | 4 | 21 | 31 | 30 | 30 | 50 | 33 | 25 | 2 | 23 | 36 | 43 |
Swell 3 Height (m) Direction Period (s) | SE 14 | ESE 14 | SE 14 | SE 14 | — | — | — | SE 10 | SE 10 | SE 10 | SE 10 | SE 10 | SE 12 | — | — | — | ESE 10 | — | — | — | — | — | — | S 9 |
| kJ | 8 | 19 | 7 | 7 | — | — | — | 4 | 4 | 4 | 4 | 4 | 6 | — | — | — | 20 | — | — | — | — | — | — | 6 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 0 | 0 | 85 | 61 | 0 | 0 | 0 | 0 | 0 | 0 | 330 | 58 | 0 | 0 | 0 | 0 | 0 | 0 | 82 | 55 | 0 | 0 | 0 | 0 |
Best forecast wave conditions in Shikoku | ||||||||||||||||||||||||
Best forecast wave conditions in Japan | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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