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Surf Forecasts:
Niyodo Rivermouth surfForecast / Shikoku / Japan
48hr Weather and Surf, issued 8 am Friday 01 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
21.5° C
(Which is 1.7°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 3PM is: 1.4m 8s primary swell from a South-southwest direction and 0.6m 8s secondary swell from a Southeast direction (forecast issued at 08:00am May 01). An open ocean swell of 1.6m 5s is not directed at the surf break. The wind direction is predicted to be cross-offshore.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (01 May) | 6ft (1.8m) | 8s |
| Afternoon (01 May) | 4.5ft (1.4m) | 8s |
| Evening (01 May) | 3.5ft (1.1m) | 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 51mm), heaviest during Sun night. Warm (max 22°C on Sat afternoon, min 13°C on Fri night). Winds decreasing (fresh winds from the W on Fri afternoon, calm by Sun morning). | ||||||||||||||||||||||||
Friday 1 | Saturday 2 | Sunday 3 | Mon 4 | |||||||||||||||||||||
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 |    |    |    |    | ||||||||||||||||||||
ESE 8 | SSW 8 | SSW 8 | SSW 8 | SSW 8 | SW 7 | WSW 5 | SW 7 | WSW 7 | ESE 10 | ESE 10 | SW 5 | SW 5 | SW 5 | ESE 10 | SE 10 | SE 10 | SSW 5 | SSW 5 | SSW 5 | SSW 6 | SSW 7 | SSW 7 | SSW 8 | |
408 | 394 | 322 | 245 | 173 | 126 | 143 | 91 | 56 | 38 | 38 | 66 | 126 | 58 | 38 | 47 | 45 | 34 | 49 | 83 | 164 | 339 | 856 | 1865 | |
Wind (km/h) | ||||||||||||||||||||||||
cross | cross-off | cross | cross-off | cross-off | cross | cross-off | off | cross-off | glassy | on | glassy | glassy | glassy | glassy | cross-off | glassy | glassy | glassy | cross-on | on | on | cross-on | cross-on | |
High Tide | 5:13AM1.75m | 6:11PM1.77m | 5:37AM1.76m | 6:45PM1.76m | 6:02AM1.75m | 7:20PM1.72m | ||||||||||||||||||
Low Tide | 11:40AM0.23m | 11:55PM0.74m | 12:09PM0.18m | 00:23AM0.80m | 12:39PM0.17m | 00:51AM0.86m | ||||||||||||||||||
 |  | | |  |  | | | | | |  | |  | | | | | |  | |  | |  | |
 | 5:16 | — | — | — | — | — | — | 5:16 | — | — | — | — | — | — | — | 5:15 | — | — | — | — | — | — | — | 5:13 |
 | — | — | — | — | 6:46 | — | — | — | — | — | — | — | 6:47 | — | — | — | — | — | — | — | 6:49 | — | — | 6:49 |
1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 2 | 3 | 16 | 24 | 4 | |
Temp °C | 19 | 19 | 19 | 17 | 15 | 15 | 15 | 13 | 14 | 19 | 21 | 22 | 21 | 19 | 17 | 17 | 17 | 19 | 20 | 19 | 20 | 22 | 22 | 22 |
20 | 15 | 12 | 10 | 10 | 11 | 13 | 10 | 12 | 18 | 19 | 22 | 21 | 19 | 17 | 16 | 17 | 20 | 21 | 20 | 20 | 20 | 21 | 23 | |
Swell 1 Height (m) Direction Period (s) | ESE 8 | SSW 8 | SSW 8 | SSW 8 | SSW 8 | SW 7 | SE 10 | SW 7 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | SE 10 | SE 10 | ESE 9 | ESE 9 | ESE 9 | ESE 10 | ESE 10 | ESE 10 | ESE 10 |
 kJ | 408 | 394 | 322 | 245 | 173 | 126 | 34 | 91 | 38 | 38 | 38 | 40 | 40 | 39 | 38 | 47 | 45 | 34 | 34 | 50 | 55 | 55 | 54 | 37 |
Swell 2 Height (m) Direction Period (s) | — | E 8 | SE 8 | SE 8 | SE 10 | SE 10 | E 9 | SE 10 | E 9 | E 9 | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | 94 | 66 | 45 | 45 | 34 | 6 | 24 | 6 | 7 | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | SE 8 | E 8 | E 8 | E 8 | E 9 | — | E 9 | E 9 | S 6 | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | 90 | 29 | 11 | 12 | 6 | — | 6 | 6 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | SSW 8 | W 4 | W 5 | W 5 | WNW 5 | W 5 | WSW 5 | WNW 5 | WSW 7 | SW 6 | SW 6 | SW 5 | SW 5 | SW 5 | SW 4 | SSW 4 | SSW 5 | SSW 5 | SSW 5 | SSW 5 | SSW 6 | SSW 7 | SSW 7 | SSW 8 |
| kJ | 306 | 46 | 115 | 138 | 133 | 98 | 143 | 24 | 56 | 31 | 21 | 66 | 126 | 58 | 21 | 13 | 14 | 31 | 49 | 83 | 164 | 339 | 856 | 1865 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 58 | 65 | 82 | 2320 | 55 | 55 | 0 | 0 | 0 | 0 | 51 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 453 | 453 | 224 | 183 | 183 |
Best forecast wave conditions in Shikoku | ||||||||||||||||||||||||
Best forecast wave conditions in Japan | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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