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Surf Forecasts:
Niyodo Rivermouth surfForecast / Shikoku / Japan
48hr Weather and Surf, issued 2 am Friday 22 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
22.6° C
(Which is 1.4°C warmer than normal for this time of year)How big are the waves at Niyodo Rivermouth today?
The current surf forecast for Niyodo Rivermouth at 8AM is: 1.3m 7s primary swell from a South-southwest direction and 0.7m 10s secondary swell from a East-southeast direction (forecast issued at 02:00am May 22). An open ocean swell of 0.4m 3s is not directed at the surf break. The wind direction is predicted to be offshore and the swell rating is 2.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (22 May) | 3.5ft (1.1m) | 7s |
| Afternoon (22 May) | 2.5ft (0.7m) | 10s |
| Evening (22 May) | 2.5ft (0.7m) | 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 18mm), heaviest on Sat afternoon. Warm (max 25°C on Fri morning, min 19°C on Fri night). Wind will be generally light. | ||||||||||||||||||||||||
Friday 22 | Saturday 23 | Sunday 24 | ||||||||||||||||||||||
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 | 6 PM | 9 PM | |
Swell Height Map |    |    |    | |||||||||||||||||||||
SW 7 | SSW 7 | SSW 7 | SSW 7 | ESE 10 | ESE 10 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 8 | ESE 8 | ESE 8 | ESE 9 | ESE 9 | ESE 9 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | E 8 | |
501 | 268 | 197 | 121 | 82 | 80 | 78 | 78 | 50 | 50 | 134 | 497 | 867 | 955 | 951 | 755 | 803 | 800 | 720 | 655 | 547 | 438 | 384 | 391 | |
Wind (km/h) | ||||||||||||||||||||||||
cross-off | cross-off | off | off | off | cross-on | on | glassy | glassy | cross | cross-on | cross-on | cross-on | cross | cross-on | cross | cross | cross-off | cross | cross | cross-on | cross-on | cross-on | cross-off | |
High Tide | 10:33PM1.59m | 9:10AM1.57m | 11:39PM1.53m | 10:29AM1.44m | 00:43AM1.51m | 12:10PM1.37m | ||||||||||||||||||
Low Tide | 3:50AM1.09m | 4:23PM0.37m | 5:12AM1.07m | 5:32PM0.52m | 6:43AM0.98m | 6:45PM0.65m | ||||||||||||||||||
 |  |  | | | |  |  |  |  |  |  | | | | | | | | | | |  | | |
 | — | 5:00 | — | — | — | — | — | — | — | 5:00 | — | — | — | — | — | — | — | 4:58 | — | — | — | — | — | — |
 | — | — | — | — | — | — | 7:02 | — | — | — | — | — | — | — | 7:02 | — | — | — | — | — | — | — | 7:04 | — |
1 | — | — | — | — | — | — | — | — | 1 | 2 | 2 | 2 | 2 | 3 | 3 | 1 | 1 | 1 | — | — | — | — | — | |
Temp °C | 23 | 21 | 19 | 24 | 25 | 24 | 23 | 22 | 21 | 19 | 20 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 22 | 23 | 23 | 23 | 21 |
26 | 23 | 19 | 23 | 24 | 24 | 24 | 25 | 23 | 20 | 20 | 20 | 20 | 21 | 21 | 21 | 22 | 23 | 23 | 23 | 23 | 24 | 25 | 23 | |
Swell 1 Height (m) Direction Period (s) | SSW 7 | SSW 7 | SSW 7 | SSW 7 | SSW 7 | SSW 7 | SSW 6 | S 6 | ESE 9 | ESE 9 | ESE 9 | SW 6 | — | — | ESE 9 | ESE 9 | — | — | — | — | S 9 | ESE 8 | ESE 8 | ESE 8 |
 kJ | 340 | 268 | 197 | 121 | 82 | 58 | 41 | 49 | 50 | 50 | 134 | 8 | — | — | 951 | 755 | — | — | — | — | 2 | 438 | 384 | 280 |
Swell 2 Height (m) Direction Period (s) | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 9 | ESE 9 | SSE 6 | S 6 | SSW 6 | — | — | — | — | — | — | — | — | — | — | SSW 8 | SSW 8 | SSW 7 |
| kJ | 81 | 83 | 83 | 83 | 81 | 80 | 78 | 78 | 21 | 11 | 11 | — | — | — | — | — | — | — | — | — | — | 13 | 19 | 16 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | NE 4 | NE 4 | E 5 | E 5 | SW 6 | SE 7 | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | 1 | 1 | 1 | 1 | 10 | 12 | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | SW 7 | — | NNW 3 | NW 3 | NW 3 | SE 2 | SE 3 | ENE 4 | ENE 4 | E 5 | E 7 | ESE 8 | ESE 8 | ESE 8 | — | — | ESE 9 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | — | — | E 8 |
| kJ | 501 | — | 1 | 3 | 1 | 1 | 4 | 11 | 17 | 25 | 89 | 497 | 867 | 955 | — | — | 803 | 800 | 720 | 655 | 547 | — | — | 391 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 0 | 0 | 55 | 61 | 0 | 0 | 29 | 29 | 229 | 229 | 330 | 224 | 243 | 224 | 0 | 183 | 229 | 82 | 29 | 29 | 0 |
Best forecast wave conditions in Shikoku | ||||||||||||||||||||||||
Best forecast wave conditions in Japan | ||||||||||||||||||||||||
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