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Surf Forecasts:
Niyodo Rivermouth surfForecast / Shikoku / Japan
48hr Weather and Surf, issued 2 pm 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
22.5° C
(Which is 1.2°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 8PM is: 0.6m 9s primary swell from a East-southeast direction and 0.7m 6s secondary swell from a South direction (forecast issued at 02:00pm May 22). An open ocean swell of 0.4m 6s is not directed at the surf break. The wind direction is predicted to be glassy.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (22 May) | - | - |
| Afternoon (22 May) | 2.5ft (0.7m) | 10s |
| Evening (22 May) | 2ft (0.6m) | 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 15mm), heaviest on Fri night. Warm (max 24°C on Fri afternoon, min 20°C on Fri night). Wind will be generally light. | ||||||||||||||||||||||||
Fri 22 | Saturday 23 | Sunday 24 | Mon 25 | |||||||||||||||||||||
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 | 12 AM | 3 AM | 6 AM | 9 AM | |
Swell Height Map |    |    |    |    | ||||||||||||||||||||
SSW 7 | SE 10 | SE 9 | ESE 9 | S 6 | E 10 | ESE 6 | ESE 7 | ESE 8 | ESE 9 | E 9 | ESE 9 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | E 8 | ESE 8 | E 9 | ESE 9 | ESE 9 | ESE 9 | |
99 | 92 | 106 | 69 | 18 | 225 | 263 | 542 | 886 | 1076 | 1088 | 858 | 865 | 800 | 702 | 629 | 644 | 589 | 737 | 471 | 653 | 455 | 436 | 391 | |
Wind (km/h) | ||||||||||||||||||||||||
glassy | cross-on | on | glassy | cross-off | cross | cross-on | cross-on | cross-on | cross-on | cross | cross | cross | cross-off | cross-off | cross-on | on | on | glassy | glassy | glassy | glassy | glassy | glassy | |
High Tide | 11:39PM1.53m | 10:29AM1.44m | 00:43AM1.51m | 12:10PM1.37m | 1:37AM1.53m | |||||||||||||||||||
Low Tide | 4:23PM0.37m | 5:12AM1.07m | 5:32PM0.52m | 6:43AM0.98m | 6:45PM0.65m | 7:57AM0.84m | ||||||||||||||||||
 | |  |  | |  |  |  | | | |  | | | | | |  | | | | | | | |
 | — | — | — | — | — | 5:00 | — | — | — | — | — | — | — | 4:58 | — | — | — | — | — | — | — | 4:58 | — | — |
 | — | — | 7:02 | — | — | — | — | — | — | — | 7:02 | — | — | — | — | — | — | — | 7:04 | — | — | — | — | 7:05 |
— | — | — | — | — | — | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 1 | — | — | — | — | — | — | — | — | — | — | |
Temp °C | 25 | 24 | 23 | 22 | 21 | 20 | 20 | 21 | 21 | 22 | 21 | 21 | 21 | 21 | 21 | 22 | 22 | 22 | 22 | 21 | 20 | 20 | 20 | 22 |
26 | 24 | 25 | 25 | 23 | 21 | 20 | 19 | 20 | 22 | 22 | 22 | 22 | 23 | 23 | 23 | 22 | 23 | 24 | 23 | 22 | 22 | 22 | 24 | |
Swell 1 Height (m) Direction Period (s) | SSW 7 | SSW 7 | SE 9 | S 6 | S 6 | SSE 6 | ESE 9 | — | — | — | E 9 | — | — | — | — | — | ESE 8 | SSW 8 | ESE 8 | ESE 8 | ESE 8 | ESE 9 | ESE 9 | ESE 9 |
 kJ | 99 | 50 | 106 | 37 | 18 | 12 | 66 | — | — | — | 1088 | — | — | — | — | — | 644 | 6 | 521 | 471 | 483 | 455 | 436 | 391 |
Swell 2 Height (m) Direction Period (s) | ESE 10 | SE 10 | SSW 6 | ESE 9 | SW 6 | SSW 6 | — | — | — | — | — | — | — | — | — | — | S 7 | — | SSW 8 | SSW 7 | SSW 7 | SSW 6 | SSW 6 | SSW 6 |
| kJ | 81 | 92 | 31 | 69 | 6 | 3 | — | — | — | — | — | — | — | — | — | — | 1 | — | 12 | 10 | 9 | 8 | 4 | 4 |
Swell 3 Height (m) Direction Period (s) | ENE 4 | ENE 4 | ENE 5 | SW 6 | SW 6 | SSE 8 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | E 16 | SSW 6 |
| kJ | 2 | 1 | 3 | 19 | 10 | 6 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 5 | 4 |
Wind waves Height (m) Direction Period (s) | — | SE 3 | SE 3 | ENE 6 | E 4 | E 10 | ESE 6 | ESE 7 | ESE 8 | ESE 9 | — | ESE 9 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | — | ESE 8 | E 8 | — | E 9 | — | — | — |
| kJ | — | 4 | 2 | 11 | 58 | 225 | 263 | 542 | 886 | 1076 | — | 858 | 865 | 800 | 702 | 629 | — | 589 | 737 | — | 653 | — | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 0 | 51 | 29 | 0 | 29 | 29 | 229 | 229 | 243 | 587 | 330 | 330 | 224 | 0 | 0 | 29 | 330 | 55 | 0 | 0 | 0 | 0 | 0 | 0 |
Best forecast wave conditions in Shikoku | ||||||||||||||||||||||||
Best forecast wave conditions in Japan | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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