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Surf Forecasts:
Niyodo Rivermouth surfForecast / Shikoku / Japan
48hr Weather and Surf, issued 8 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 11AM is: 1.1m 7s primary swell from a South-southwest direction and 0.7m 10s secondary swell from a East-southeast direction (forecast issued at 08:00am 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.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (22 May) | 4ft (1.2m) | 7s |
| 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 17mm), heaviest on Sat afternoon. Warm (max 25°C on Fri morning, min 20°C on Fri night). Wind will be generally light. | ||||||||||||||||||||||||
Friday 22 | Saturday 23 | Sunday 24 | Mon 25 | |||||||||||||||||||||
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 | 12 AM | 3 AM | |
Swell Height Map |    |    |    |    | ||||||||||||||||||||
SSW 7 | SSW 7 | SSW 7 | ESE 10 | SE 9 | ESE 9 | ESE 10 | ESE 9 | ESE 6 | ESE 8 | ESE 8 | E 9 | E 9 | ESE 9 | ESE 9 | ESE 8 | ESE 9 | ESE 8 | ESE 8 | ESE 8 | E 8 | ESE 8 | ESE 8 | ESE 8 | |
203 | 128 | 99 | 80 | 90 | 69 | 51 | 78 | 197 | 450 | 804 | 1171 | 1018 | 858 | 977 | 955 | 959 | 782 | 702 | 629 | 608 | 414 | 370 | 318 | |
Wind (km/h) | ||||||||||||||||||||||||
off | off | off | cross-on | on | cross-off | glassy | glassy | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross | cross | cross-off | cross-on | cross-on | cross-on | cross-on | cross-on | glassy | off | |
High Tide | 9:10AM1.57m | 11:39PM1.53m | 10:29AM1.44m | 00:43AM1.51m | 12:10PM1.37m | 1:37AM1.53m | ||||||||||||||||||
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 | — | — | — | — | — | — | — | 4:58 |
 | — | — | — | — | 7:02 | — | — | — | — | — | — | — | 7:02 | — | — | — | — | — | — | — | 7:04 | — | — | 7:05 |
— | — | — | — | — | — | — | — | 1 | 2 | 2 | 3 | 1 | 3 | 3 | 2 | — | — | — | — | — | — | — | — | |
Temp °C | 20 | 24 | 25 | 24 | 23 | 22 | 21 | 21 | 20 | 21 | 21 | 21 | 21 | 20 | 21 | 21 | 21 | 23 | 23 | 23 | 22 | 21 | 20 | 20 |
21 | 23 | 24 | 24 | 24 | 24 | 23 | 23 | 20 | 20 | 20 | 21 | 22 | 22 | 22 | 23 | 23 | 24 | 23 | 24 | 23 | 23 | 22 | 22 | |
Swell 1 Height (m) Direction Period (s) | SSW 7 | SSW 7 | SSW 7 | S 7 | SE 9 | S 6 | S 6 | ESE 9 | ESE 9 | — | — | E 9 | E 9 | — | — | — | S 8 | SW 8 | SSW 8 | SSW 7 | ESE 8 | ESE 8 | ESE 8 | ESE 8 |
 kJ | 203 | 128 | 99 | 70 | 90 | 48 | 28 | 78 | 73 | — | — | 1171 | 1018 | — | — | — | 1 | 3 | 12 | 9 | 460 | 414 | 370 | 318 |
Swell 2 Height (m) Direction Period (s) | ESE 10 | ESE 10 | ESE 10 | ESE 10 | SSW 6 | ESE 9 | ESE 10 | S 6 | S 6 | — | — | — | — | — | — | — | — | — | — | SSW 8 | SSW 7 | SSW 7 | SSW 6 | SSW 6 |
| kJ | 83 | 83 | 81 | 80 | 31 | 69 | 51 | 18 | 17 | — | — | — | — | — | — | — | — | — | — | 6 | 9 | 9 | 8 | 8 |
Swell 3 Height (m) Direction Period (s) | — | — | NE 4 | NE 5 | E 5 | E 6 | SW 6 | SW 6 | — | — | — | — | — | — | — | — | — | — | — | — | SSW 8 | S 6 | S 6 | SSE 6 |
| kJ | — | — | 1 | 1 | 1 | 1 | 6 | 5 | — | — | — | — | — | — | — | — | — | — | — | — | 7 | 7 | 3 | 8 |
Wind waves Height (m) Direction Period (s) | WNW 4 | NW 3 | NW 3 | ESE 3 | SE 4 | ENE 4 | ENE 4 | E 4 | ESE 6 | ESE 8 | ESE 8 | — | — | ESE 9 | ESE 9 | ESE 8 | ESE 9 | ESE 8 | ESE 8 | ESE 8 | E 8 | — | — | — |
| kJ | 20 | 2 | 3 | 6 | 10 | 2 | 24 | 24 | 197 | 450 | 804 | — | — | 858 | 977 | 955 | 959 | 782 | 702 | 629 | 608 | — | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 51 | 29 | 0 | 0 | 0 | 229 | 330 | 235 | 29 | 29 | 330 | 224 | 183 | 0 | 86 | 82 | 29 | 29 | 29 | 0 | 0 |
Best forecast wave conditions in Shikoku | ||||||||||||||||||||||||
Best forecast wave conditions in Japan | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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