Using Surf-Forecast’s Historical Surf Data To Find The Most Consistent Waves On Earth
Using our statistical data for 7000 spots dating back to 2006, we can find those waves that break the most, with the best winds.
Surf Forecasts:
Niyodo Rivermouth surfForecast / Shikoku / Japan
48hr Weather and Surf, issued 8 am Monday 05 Jan 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
18.8° 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: 1.1m 4s primary swell from a West direction and 0.2m 10s secondary swell from a East-southeast direction (forecast issued at 08:00am January 05). The wind direction is predicted to be cross-shore.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (05 Jan) | 2.5ft (0.7m) | 4s |
| Afternoon (05 Jan) | 3.5ft (1.1m) | 4s |
| Evening (05 Jan) | 2ft (0.6m) | 5s |
Table - waves today at Niyodo Rivermouth. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Monday 05 | Tuesday 06 | Wednesday 07 | Thu 08 | |||||||||||||||||||||
| 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) (?) | 10 | 4 | 4 | 4 | 4 | 5 | 7 | 7 | 7 | 6 | 9 | 9 | 9 | 9 | 10 | 11 | 10 | 10 | 10 | 10 | 14 | 14 | 14 | 4 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 9 | 13 | 35 | 46 | 36 | 16 | 21 | 16 | 7 | 4 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 4 | 4 | 4 | 48 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | glass | off | cross- off | cross | cross- off | off | off | cross- off | off | off | cross- off | cross- off | off | off | off | off | off | glass | glass | on | cross- off | cross- off | cross- off | cross- off |
High Tide / height (m) | 7:49AM 1.84 | 6:49PM 1.87 | 8:26AM 1.79 | 7:34PM 1.81 | 9:01AM 1.74 | 8:19PM 1.71 | ||||||||||||||||||
Low Tide / height (m) | 1:16PM 0.89 | 1:39AM -0.02 | 1:57PM 0.85 | 2:18AM 0.11 | 2:39PM 0.82 | 2:55AM 0.29 | ||||||||||||||||||
Monday 05 | Tuesday 06 | Wednesday 07 | Thu 08 | |||||||||||||||||||||
| Sunrise | - | 7:09 | - | - | - | - | - | - | - | 7:09 | - | - | - | - | - | - | - | 7:09 | - | - | - | - | - | - |
| Sunset | - | - | - | 5:09 | - | - | - | - | - | - | - | 5:10 | - | - | - | - | - | - | - | 5:12 | - | - | - | - |
 |  |  |  |  | | | | | | | | |  | | | | | | | | | | | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 7 | 8 | 10 | 11 | 9 | 7 | 5 | 4 | 5 | 6 | 9 | 10 | 7 | 5 | 6 | 6 | 6 | 7 | 11 | 11 | 9 | 7 | 6 | 5 |
| Feels °C (?) | 4 | 5 | 7 | 6 | 5 | 2 | 1 | 0 | 1 | 2 | 5 | 6 | 3 | 1 | 2 | 2 | 2 | 4 | 8 | 7 | 4 | 3 | 3 | 2 |
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
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