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Surf Forecasts:
Niyodo Rivermouth surfForecast / Shikoku / Japan
48hr Weather and Surf, issued 8 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 2AM is: 1.2m 5s primary swell from a East direction and 0.4m 6s secondary swell from a South direction, 0.2m 6s secondary swell from a South-southwest direction (forecast issued at 08:00pm May 22). The wind direction is predicted to be glassy.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (23 May) | 7.5ft (2.3m) | 7s |
| Afternoon (23 May) | 8ft (2.5m) | 8s |
| Evening (23 May) | 7ft (2.1m) | 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 16mm), heaviest on Fri night. Warm (max 23°C on Sun morning, min 19°C on Sun night). Wind will be generally light. | ||||||||||||||||||||||||
Fri 22 | Saturday 23 | Sunday 24 | Monday 25 | |||||||||||||||||||||
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 | 12 PM | 3 PM | |
Swell Height Map |   |    |    |    | ||||||||||||||||||||
SE 9 | ESE 9 | ESE 9 | E 5 | ESE 7 | ESE 7 | ESE 8 | ESE 8 | ESE 9 | ESE 9 | E 9 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | E 8 | E 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | |
106 | 69 | 50 | 60 | 421 | 588 | 865 | 932 | 754 | 631 | 642 | 645 | 688 | 730 | 671 | 629 | 575 | 509 | 601 | 470 | 318 | 286 | 250 | 256 | |
Wind (km/h) | ||||||||||||||||||||||||
on | glassy | glassy | cross | cross | cross-on | cross-on | cross-on | cross | cross | cross | cross-off | cross | cross | cross-on | cross-on | cross-on | cross | glassy | glassy | glassy | glassy | on | on | |
High Tide | 11:39PM1.53m | 10:29AM1.44m | 00:43AM1.51m | 12:10PM1.37m | 1:37AM1.53m | 1:48PM1.38m | ||||||||||||||||||
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 |
— | 1 | 1 | — | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 1 | 1 | — | — | — | — | — | — | — | — | — | — | — | |
Temp °C | 23 | 22 | 21 | 21 | 20 | 21 | 21 | 22 | 22 | 21 | 21 | 21 | 21 | 22 | 23 | 23 | 22 | 21 | 21 | 20 | 19 | 22 | 23 | 23 |
25 | 24 | 23 | 23 | 20 | 20 | 20 | 22 | 23 | 23 | 23 | 23 | 22 | 23 | 24 | 23 | 23 | 23 | 23 | 22 | 21 | 24 | 24 | 24 | |
Swell 1 Height (m) Direction Period (s) | SE 9 | S 6 | ESE 9 | S 6 | — | — | — | — | ESE 9 | ESE 9 | E 9 | — | — | — | — | — | S 6 | SSW 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 |
 kJ | 106 | 48 | 50 | 11 | — | — | — | — | 754 | 631 | 642 | — | — | — | — | — | 1 | 6 | 460 | 414 | 318 | 286 | 250 | 256 |
Swell 2 Height (m) Direction Period (s) | SSW 6 | ESE 9 | S 6 | SSW 6 | — | — | — | — | — | — | — | — | — | — | — | — | S 8 | — | SSW 8 | SSW 7 | SSW 7 | SSW 6 | SSW 6 | SW 6 |
| kJ | 41 | 69 | 18 | 3 | — | — | — | — | — | — | — | — | — | — | — | — | 1 | — | 6 | 10 | 9 | 4 | 4 | 1 |
Swell 3 Height (m) Direction Period (s) | ENE 5 | ENE 6 | SW 6 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | SSW 7 | E 16 | E 16 | E 16 |
| kJ | 3 | 6 | 10 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 9 | 5 | 5 | 5 |
Wind waves Height (m) Direction Period (s) | SE 3 | ENE 5 | ENE 4 | E 5 | ESE 7 | ESE 7 | ESE 8 | ESE 8 | SSE 6 | — | — | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | E 8 | E 8 | — | — | — | — |
| kJ | 5 | 15 | 22 | 60 | 421 | 588 | 865 | 932 | 58 | — | — | 645 | 688 | 730 | 671 | 629 | 575 | 509 | 601 | 470 | — | — | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 29 | 0 | 0 | 183 | 229 | 229 | 330 | 29 | 29 | 29 | 29 | 0 | 103 | 82 | 82 | 29 | 29 | 29 | 0 | 0 | 0 | 0 | 58 | 58 |
Best forecast wave conditions in Shikoku | ||||||||||||||||||||||||
Best forecast wave conditions in Japan | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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