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Surf Forecasts:
Niyodo Rivermouth surfForecast / Shikoku / Japan
48hr Weather and Surf, issued 2 am Monday 04 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
21.1° C
(Which is 1.0°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 7AM is: 2.0m 8s primary swell from a South-southwest direction and 0.4m 10s secondary swell from a East-southeast direction (forecast issued at 02:00am May 04). An open ocean swell of 1.0m 4s is not directed at the surf break. The wind direction is predicted to be cross-shore.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (04 May) | 6ft (1.8m) | 8s |
| Afternoon (04 May) | 4.5ft (1.3m) | 8s |
| Evening (04 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 ForecastMostly dry. Warm (max 20°C on Wed morning, min 13°C on Mon night). Winds decreasing (fresh winds from the WNW on Mon morning, calm by Wed afternoon). | ||||||||||||||||||||||||
Monday 4 | Tuesday 5 | Wednesday 6 | ||||||||||||||||||||||
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 | 6 PM | 9 PM | |
Swell Height Map |    |    |    | |||||||||||||||||||||
SSW 9 | SSW 9 | SSW 8 | SSW 8 | SSW 8 | SSW 8 | SSW 8 | SW 7 | SSW 7 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | SE 10 | |
1717 | 1515 | 618 | 414 | 298 | 202 | 142 | 121 | 46 | 42 | 42 | 42 | 41 | 58 | 58 | 57 | 65 | 64 | 63 | 83 | 81 | 81 | 80 | 92 | |
Wind (km/h) | ||||||||||||||||||||||||
cross-on | cross | cross | cross | cross-off | cross-off | cross-off | cross-off | off | cross-off | off | cross-on | on | on | glassy | cross-off | off | off | off | glassy | on | on | glassy | off | |
High Tide | 6:27AM1.73m | 7:55PM1.66m | 6:53AM1.69m | 8:33PM1.57m | 7:21AM1.64m | |||||||||||||||||||
Low Tide | 00:51AM0.86m | 1:11PM0.20m | 1:19AM0.93m | 1:44PM0.26m | 1:49AM1.00m | 2:21PM0.34m | ||||||||||||||||||
 |  |  |  | | | |  |  | | |  | | | |  | | | | | | | | | |
 | — | 5:13 | — | — | — | — | — | — | — | 5:13 | — | — | — | — | — | — | — | 5:13 | — | — | — | — | — | — |
 | — | — | — | — | — | — | 6:49 | — | — | — | — | — | — | — | 6:50 | — | — | — | — | — | — | — | 6:51 | — |
7 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Temp °C | 21 | 20 | 17 | 19 | 19 | 18 | 17 | 15 | 13 | 13 | 13 | 17 | 18 | 18 | 17 | 15 | 14 | 14 | 14 | 18 | 20 | 20 | 19 | 16 |
22 | 20 | 15 | 15 | 11 | 12 | 13 | 13 | 11 | 11 | 11 | 15 | 15 | 16 | 16 | 14 | 12 | 12 | 12 | 17 | 18 | 19 | 20 | 15 | |
Swell 1 Height (m) Direction Period (s) | ESE 10 | SSW 9 | SSW 8 | SSW 8 | SSW 8 | SSW 8 | SSW 8 | SW 7 | SSW 7 | SW 7 | ESE 10 | S 6 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | SE 10 |
 kJ | 38 | 1159 | 618 | 414 | 298 | 202 | 142 | 121 | 46 | 25 | 42 | 21 | 41 | 58 | 58 | 57 | 65 | 64 | 63 | 83 | 81 | 81 | 80 | 92 |
Swell 2 Height (m) Direction Period (s) | E 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | SW 7 | ESE 10 | SSE 6 | S 6 | S 6 | S 6 | S 5 | S 5 | S 5 | — | S 5 | — | — | SSE 3 |
| kJ | 7 | 38 | 38 | 38 | 38 | 37 | 38 | 38 | 41 | 42 | 11 | 42 | 7 | 11 | 6 | 6 | 2 | 2 | 2 | — | 2 | — | — | 1 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | SE 7 | SE 8 | SE 7 | SSE 7 | SSE 6 | SSW 6 | SW 6 | — | — | — | — | — | S 5 | SW 6 | — | — | E 3 |
| kJ | — | — | — | — | — | — | — | 9 | 9 | 14 | 9 | 13 | 8 | 6 | — | — | — | — | — | 1 | 2 | — | — | 1 |
Wind waves Height (m) Direction Period (s) | SSW 9 | SSW 9 | W 4 | W 4 | W 5 | WNW 5 | WNW 4 | NW 4 | W 4 | W 3 | WNW 3 | — | — | — | — | — | — | — | — | — | E 3 | E 6 | ESE 3 | — |
| kJ | 1717 | 1515 | 37 | 46 | 81 | 78 | 36 | 7 | 4 | 2 | 2 | — | — | — | — | — | — | — | — | — | 1 | 7 | 1 | — |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 183 | 82 | 55 | 55 | 82 | 65 | 55 | 0 | 0 | 0 | 0 | 55 | 330 | 51 | 0 | 0 | 0 | 0 | 0 | 0 | 432 | 432 | 0 | 0 |
Best forecast wave conditions in Shikoku | ||||||||||||||||||||||||
Best forecast wave conditions in Japan | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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