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Surf Forecasts:
Niyodo Rivermouth surfForecast / Shikoku / Japan
48hr Weather and Surf, issued 2 pm Thursday 21 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 9PM is: 2.1m 7s primary swell from a South-southwest direction and 0.8m 10s secondary swell from a East-southeast direction (forecast issued at 02:00pm May 21). The wind direction is predicted to be cross-shore.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (21 May) | - | - |
| Afternoon (21 May) | 5ft (1.6m) | 7s |
| Evening (21 May) | 7ft (2.1m) | 7s |
Table - waves today at Niyodo Rivermouth. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastHeavy rain (total 32mm), heaviest during Sat night. Warm (max 26°C on Fri morning, min 20°C on Thu night). Wind will be generally light. | ||||||||||||||||||||||||
Thu 21 | Friday 22 | Saturday 23 | Sun 24 | |||||||||||||||||||||
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 |    |    |    |    | ||||||||||||||||||||
S 7 | S 7 | SSW 7 | SSW 7 | SW 7 | SSW 7 | SSW 7 | SSW 7 | SSW 7 | ESE 10 | ESE 9 | ESE 9 | ESE 9 | ESE 10 | E 7 | ESE 8 | ESE 8 | ESE 8 | E 9 | ESE 9 | E 9 | ESE 9 | E 9 | E 8 | |
243 | 269 | 485 | 456 | 503 | 280 | 203 | 128 | 99 | 80 | 78 | 78 | 50 | 52 | 70 | 384 | 703 | 953 | 1075 | 1023 | 1131 | 1023 | 809 | 836 | |
Wind (km/h) | ||||||||||||||||||||||||
on | on | on | cross | cross-off | cross-off | off | off | off | cross-on | on | glassy | glassy | cross-on | cross-on | cross-on | cross-on | cross-on | cross | cross | cross | off | cross-off | cross-off | |
High Tide | 10:33PM1.59m | 9:10AM1.57m | 11:39PM1.53m | 10:29AM1.44m | 00:43AM1.51m | |||||||||||||||||||
Low Tide | 3:21PM0.20m | 3:50AM1.09m | 4:23PM0.37m | 5:12AM1.07m | 5:32PM0.52m | 6:43AM0.98m | ||||||||||||||||||
 |  | |  |  |  |  | | | |  |  | | |  | | | | |  |  | | |  | |
 | — | — | — | — | — | 5:00 | — | — | — | — | — | — | — | 5:00 | — | — | — | — | — | — | — | 4:58 | — | — |
 | — | — | 7:01 | — | — | — | — | — | — | — | 7:02 | — | — | — | — | — | — | — | 7:02 | — | — | — | — | 7:04 |
3 | 1 | 1 | — | 1 | — | — | — | — | — | — | — | — | — | 1 | 2 | 2 | 3 | 5 | 6 | 4 | 5 | 1 | — | |
Temp °C | 23 | 23 | 24 | 23 | 23 | 21 | 20 | 24 | 26 | 24 | 22 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 |
26 | 27 | 28 | 26 | 27 | 23 | 21 | 23 | 25 | 23 | 23 | 23 | 23 | 21 | 21 | 20 | 20 | 20 | 22 | 23 | 23 | 23 | 22 | 22 | |
Swell 1 Height (m) Direction Period (s) | S 7 | ESE 9 | ESE 9 | ESE 10 | SSW 7 | SSW 7 | SSW 7 | SSW 7 | SSW 7 | SSW 7 | SSW 6 | S 6 | ESE 9 | ENE 4 | ESE 9 | SW 6 | — | — | E 9 | — | E 9 | ESE 9 | E 9 | SSW 6 |
 kJ | 188 | 148 | 110 | 103 | 363 | 280 | 203 | 128 | 99 | 58 | 41 | 28 | 50 | 15 | 68 | 5 | — | — | 1075 | — | 1131 | 1023 | 809 | 10 |
Swell 2 Height (m) Direction Period (s) | ESE 9 | — | — | — | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 9 | ESE 9 | S 6 | ESE 10 | S 6 | — | — | — | — | — | S 6 | — | S 5 | S 8 |
| kJ | 136 | — | — | — | 81 | 83 | 83 | 83 | 81 | 80 | 78 | 78 | 19 | 52 | 17 | — | — | — | — | — | 16 | — | 21 | 1 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | ENE 4 | NE 4 | NE 6 | SSE 7 | SW 6 | S 6 | SW 6 | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | 2 | 1 | 1 | 5 | 9 | 17 | 6 | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | S 7 | S 7 | SSW 7 | SSW 7 | SW 7 | — | WNW 4 | NW 3 | NW 3 | — | SSE 3 | ESE 3 | ENE 4 | — | E 7 | ESE 8 | ESE 8 | ESE 8 | — | ESE 9 | — | — | — | E 8 |
| kJ | 243 | 269 | 485 | 456 | 503 | — | 11 | 2 | 3 | — | 4 | 8 | 13 | — | 70 | 384 | 703 | 953 | — | 1023 | — | — | — | 836 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 51 | 51 | 51 | 51 | 0 | 0 | 0 | 0 | 0 | 29 | 61 | 0 | 0 | 29 | 29 | 229 | 229 | 224 | 29 | 245 | 183 | 0 | 0 | 0 |
Best forecast wave conditions in Shikoku | ||||||||||||||||||||||||
Best forecast wave conditions in Japan | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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