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Surf Forecasts:
Niyodo Rivermouth surfForecast / Shikoku / Japan
48hr Weather and Surf, issued 8 pm 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 1AM is: 0.9m 9s primary swell from a East-southeast direction and 0.3m 12s secondary swell from a Southeast direction (forecast issued at 08:00pm May 17). The wind direction is predicted to be offshore.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (18 May) | 2.5ft (0.7m) | 9s |
| Afternoon (18 May) | 2.5ft (0.8m) | 9s |
| Evening (18 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 ForecastModerate rain (total 11mm), heaviest on Tue night. Warm (max 24°C on Mon morning, min 18°C on Sun night). Wind will be generally light. | ||||||||||||||||||||||||
Sun 17 | Monday 18 | Tuesday 19 | Wednesday 20 | |||||||||||||||||||||
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 | 12 PM | 3 PM | |
Swell Height Map |   |    |    |    | ||||||||||||||||||||
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 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | |
106 | 108 | 111 | 111 | 92 | 84 | 106 | 106 | 106 | 111 | 106 | 106 | 103 | 76 | 154 | 171 | 146 | 170 | 170 | 166 | 163 | 163 | 160 | 190 | |
Wind (km/h) | ||||||||||||||||||||||||
glassy | cross-off | off | off | off | glassy | on | on | cross-on | glassy | off | glassy | cross-off | on | on | on | glassy | glassy | off | glassy | glassy | glassy | cross-on | cross-on | |
High Tide | 6:51PM1.90m | 5:58AM1.88m | 7:41PM1.85m | 6:39AM1.85m | 8:34PM1.77m | 7:22AM1.79m | ||||||||||||||||||
Low Tide | 00:25AM0.84m | 12:48PM-0.10m | 1:09AM0.92m | 1:36PM-0.06m | 1:54AM1.00m | 2:26PM0.05m | ||||||||||||||||||
 |  | | | | | | | | | |  | | | |  | |  | |  |  | |  | | |
 | — | — | — | 5:03 | — | — | — | — | — | — | — | 5:01 | — | — | — | — | — | — | — | 5:01 | — | — | — | — |
 | 6:59 | — | — | — | — | — | — | — | 7:00 | — | — | — | — | — | — | — | 7:00 | — | — | — | — | — | — | 7:00 |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 2 | 1 | 1 | 2 | 2 | 1 | 1 | |
Temp °C | 22 | 20 | 19 | 18 | 19 | 23 | 24 | 24 | 22 | 20 | 19 | 18 | 18 | 21 | 23 | 22 | 21 | 19 | 20 | 20 | 20 | 21 | 23 | 23 |
24 | 21 | 19 | 17 | 19 | 23 | 24 | 24 | 23 | 22 | 20 | 19 | 19 | 21 | 22 | 23 | 23 | 21 | 22 | 22 | 23 | 24 | 26 | 25 | |
Swell 1 Height (m) Direction Period (s) | 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 | SSE 8 | S 8 | S 7 | S 7 |
 kJ | 106 | 108 | 111 | 111 | 92 | 84 | 106 | 106 | 106 | 111 | 106 | 106 | 103 | 76 | 154 | 171 | 146 | 170 | 170 | 166 | 159 | 157 | 159 | 171 |
Swell 2 Height (m) Direction Period (s) | SE 12 | SE 11 | SE 12 | SE 12 | SE 12 | SE 12 | SE 12 | SE 10 | SE 10 | SE 12 | SE 11 | SE 11 | SE 11 | SE 10 | E 8 | E 9 | SSE 6 | SE 6 | S 9 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 |
| kJ | 24 | 19 | 23 | 23 | 23 | 23 | 23 | 4 | 4 | 21 | 31 | 30 | 30 | 50 | 33 | 25 | 27 | 39 | 15 | 166 | 163 | 163 | 160 | 190 |
Swell 3 Height (m) Direction Period (s) | — | — | — | SE 10 | SE 10 | SE 10 | SE 10 | SE 12 | SE 12 | — | — | — | ESE 10 | — | — | — | — | S 9 | — | — | — | — | — | — |
| kJ | — | — | — | 4 | 4 | 4 | 4 | 6 | 6 | — | — | — | 20 | — | — | — | — | 2 | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | ESE 2 | SE 3 | ESE 4 | — | — | — | — | — | SE 5 | — | — | SE 7 | SSE 8 | SSE 7 | — | — | — |
| kJ | — | — | — | — | — | — | — | 1 | 1 | 6 | — | — | — | — | — | 19 | — | — | 63 | 107 | 135 | — | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 0 | 0 | 0 | 523 | 58 | 55 | 0 | 0 | 0 | 0 | 55 | 58 | 58 | 0 | 0 | 0 | 0 | 0 | 0 | 29 | 29 |
Best forecast wave conditions in Shikoku | ||||||||||||||||||||||||
Best forecast wave conditions in Japan | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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