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Surf Forecasts:
Niyodo Rivermouth surfForecast / Shikoku / Japan
48hr Weather and Surf, issued 8 am Friday 17 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
19.4° C
(Which is slightly warmer than usual)How big are the waves at Niyodo Rivermouth today?
The current surf forecast for Niyodo Rivermouth at 4PM is: 1.8m 14s primary swell from a Southeast direction and 2.0m 9s secondary swell from a East-southeast direction (forecast issued at 08:00am April 17). The wind direction is predicted to be cross-onshore.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (17 Apr) | 6ft (1.9m) | 15s |
| Afternoon (17 Apr) | 6ft (1.8m) | 14s |
| Evening (17 Apr) | 6.5ft (2.0m) | 16s |
Table - waves today at Niyodo Rivermouth. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Friday 17 | Saturday 18 | Sunday 19 | Mon 20 | |||||||||||||||||||||
| 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) (?) | 15 | 15 | 15 | 14 | 14 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 15 | 15 | 15 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 1808 | 1606 | 1563 | 1307 | 1307 | 1884 | 2328 | 2610 | 2578 | 2687 | 2513 | 2925 | 2584 | 2169 | 2140 | 1956 | 1812 | 1812 | 1945 | 2085 | 2265 | 2265 | 2233 | 2250 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | glass | glass | cross- on | cross- on | cross- on | cross- off | cross- off | cross- off | cross- off | glass | cross- on | on | glass | glass | glass | glass | off | glass | on | on | glass | glass | glass | off |
High Tide / height (m) | 5:27AM 1.88 | 6:08PM 1.93 | 5:56AM 1.90 | 6:52PM 1.94 | 6:26AM 1.90 | 7:39PM 1.88 | ||||||||||||||||||
Low Tide / height (m) | 11:45AM 0.17 | 12:04AM 0.52 | 12:22PM 0.05 | 12:40AM 0.62 | 1:01PM -0.01 | 1:17AM 0.76 | ||||||||||||||||||
Friday 17 | Saturday 18 | Sunday 19 | Mon 20 | |||||||||||||||||||||
| Sunrise | 5:33 | - | - | - | - | - | - | - | 5:31 | - | - | - | - | - | - | - | 5:31 | - | - | - | - | - | - | - |
| Sunset | - | - | - | - | 6:36 | - | - | - | - | - | - | - | 6:37 | - | - | - | - | - | - | - | 6:37 | - | - | - |
 | |  | | |  |  | |  | | | | | | | | | | | | | | | | |
Rain (mm) | - | - | 1 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 16 | 17 | 19 | 19 | 18 | 16 | 16 | 16 | 16 | 18 | 19 | 19 | 18 | 17 | 17 | 16 | 16 | 19 | 20 | 20 | 18 | 17 | 17 | 16 |
| Feels °C (?) | 15 | 17 | 16 | 15 | 15 | 14 | 15 | 16 | 15 | 18 | 18 | 18 | 19 | 18 | 17 | 16 | 16 | 20 | 19 | 19 | 18 | 18 | 18 | 16 |
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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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