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Surf Forecasts:
Niyodo Rivermouth surfForecast / Shikoku / Japan
48hr Weather and Surf, issued 8 pm Monday 13 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 slightly warmer than usual)How big are the waves at Niyodo Rivermouth today?
The current surf forecast for Niyodo Rivermouth at 2AM is: 0.9m 11s primary swell from a East-southeast direction and 0.3m 4s secondary swell from a South direction (forecast issued at 08:00pm April 13). The wind direction is predicted to be glassy and the swell rating is 2.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (14 Apr) | 3ft (0.9m) | 11s |
| Afternoon (14 Apr) | 3.5ft (1.0m) | 11s |
| Evening (14 Apr) | 3.5ft (1.1m) | 12s |
Table - waves today at Niyodo Rivermouth. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Mon 13 | Tuesday 14 | Wednesday 15 | Thursday 16 | |||||||||||||||||||||
| 6 PM | 9 PM | 0 AM | 3 AM | 6 AM | 9 AM | 12 PM | 3 PM | 6 PM | 9 PM | 0 AM | 3 AM | 6 AM | 9 AM | 12 PM | 3 PM | 6 PM | 9 PM | 0 AM | 3 AM | 6 AM | 9 AM | 12 PM | 3 PM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |   |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 12 | 12 | 12 | 12 | 12 | 18 | 17 | 16 | 16 | 16 | 16 | 16 | 15 | 15 | 14 | 16 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 163 | 146 | 183 | 204 | 200 | 200 | 200 | 251 | 319 | 325 | 330 | 330 | 379 | 679 | 951 | 2042 | 2287 | 2087 | 2354 | 2295 | 1933 | 1881 | 1363 | 2404 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | glass | glass | glass | glass | glass | glass | on | on | cross- on | glass | glass | off | glass | glass | glass | glass | off | glass | glass | off | off | off | glass | on |
High Tide / height (m) | ||||||||||||||||||||||||
Low Tide / height (m) | ||||||||||||||||||||||||
Mon 13 | Tuesday 14 | Wednesday 15 | Thursday 16 | |||||||||||||||||||||
| Sunrise | - | - | - | - | 5:37 | - | - | - | - | - | - | - | 5:35 | - | - | - | - | - | - | - | 5:33 | - | - | - |
| Sunset | 6:32 | - | - | - | - | - | - | - | 6:34 | - | - | - | - | - | - | - | 6:35 | - | - | - | - | - | - | - |
 |  | | | | | | |  |  |  | | | | | | | |  | |  | | | | |
Rain (mm) | - | - | - | - | - | - | - | - | 2 | 1 | - | 1 | 2 | 1 | 2 | 1 | 2 | 2 | 1 | - | - | - | - | - |
| Temp. °C | 17 | 17 | 16 | 16 | 16 | 17 | 19 | 19 | 17 | 17 | 16 | 16 | 16 | 17 | 17 | 17 | 17 | 17 | 17 | 16 | 15 | 19 | 23 | 22 |
| Feels °C (?) | 18 | 18 | 17 | 17 | 16 | 18 | 18 | 18 | 18 | 18 | 17 | 16 | 17 | 18 | 18 | 18 | 18 | 18 | 18 | 15 | 14 | 17 | 22 | 21 |
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Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
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