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Surf Forecasts:
Niyodo Rivermouth surfForecast / Shikoku / Japan
48hr Weather and Surf, issued 8 am Tuesday 14 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 5PM is: 1.1m 12s primary swell from a Southeast direction and 0.6m 6s secondary swell from a Southeast direction (forecast issued at 08:00am April 14). 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
Tuesday 14 | Wednesday 15 | Thursday 16 | Fri 17 | |||||||||||||||||||||
| 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 | 6 PM | 9 PM | 0 AM | 3 AM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |    |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 11 | 11 | 11 | 11 | 12 | 12 | 12 | 12 | 12 | 18 | 17 | 16 | 16 | 16 | 16 | 16 | 15 | 14 | 16 | 16 | 16 | 16 | 15 | 15 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 200 | 200 | 200 | 251 | 319 | 325 | 325 | 330 | 379 | 679 | 951 | 1761 | 2445 | 2087 | 2506 | 2443 | 1801 | 1484 | 2384 | 2538 | 2475 | 2295 | 2237 | 2150 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- off | glass | on | on | off | glass | cross- off | glass | glass | cross- off | glass | glass | glass | off | off | cross- off | cross- off | off | cross- off | glass | cross- on | off | off | cross- off |
High Tide / height (m) | ||||||||||||||||||||||||
Low Tide / height (m) | ||||||||||||||||||||||||
Tuesday 14 | Wednesday 15 | Thursday 16 | Fri 17 | |||||||||||||||||||||
| Sunrise | 5:37 | - | - | - | - | - | - | - | 5:35 | - | - | - | - | - | - | - | 5:33 | - | - | - | - | - | - | - |
| Sunset | - | - | - | - | 6:34 | - | - | - | - | - | - | - | 6:35 | - | - | - | - | - | - | - | 6:36 | - | - | - |
 | |  |  |  |  | | | | | | | | | |  | | | | | | | |  | |
Rain (mm) | - | - | - | - | 2 | 5 | 4 | 1 | 2 | 1 | 2 | 1 | 1 | 2 | 1 | - | - | - | - | - | - | - | - | - |
| Temp. °C | 15 | 17 | 19 | 19 | 17 | 16 | 16 | 16 | 16 | 17 | 17 | 17 | 17 | 17 | 16 | 16 | 15 | 18 | 22 | 22 | 19 | 15 | 13 | 13 |
| Feels °C (?) | 15 | 18 | 18 | 19 | 18 | 17 | 16 | 17 | 17 | 18 | 18 | 18 | 18 | 18 | 16 | 15 | 13 | 15 | 19 | 21 | 19 | 13 | 10 | 10 |
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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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