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Surf Forecasts:
Niyodo Rivermouth surfForecast / Shikoku / Japan
48hr Weather and Surf, issued 8 am Thursday 28 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
23.0° C
(Which is 1.3°C warmer than normal for this time of year)How big are the waves at Niyodo Rivermouth today (28 May):
- Morning surf: Morning surf (28 May, local time) - 4ft (1.2m), 7s period with ESE swell.
- Afternoon surf: Afternoon surf (28 May, local time) - 2.5ft (0.8m), 8s period with E swell.
- Evening surf: Evening surf (28 May, local time) - 3ft (0.9m), 6s period with S swell.
The current surf forecast for Niyodo Rivermouth at 2PM is: 0.8m 8s primary swell from a East direction and 0.8m 7s secondary swell from a South-southwest direction (forecast issued at 08:00am May 28). The wind direction is predicted to be glassy.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (28 May) | 4ft (1.2m) | 7s |
| Afternoon (28 May) | 2.5ft (0.8m) | 8s |
| Evening (28 May) | 3ft (0.9m) | 6s |
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 28°C on Fri morning, min 18°C on Fri night). Wind will be generally light. | ||||||||||||||||||||||||
Thursday 28 | Friday 29 | Saturday 30 | Sun 31 | |||||||||||||||||||||
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 7 | ESE 7 | S 7 | E 8 | S 7 | S 6 | S 6 | S 6 | S 7 | SSW 7 | ESE 10 | SW 7 | E 11 | E 10 | E 10 | E 10 | E 10 | E 10 | E 10 | E 10 | ESE 11 | ESE 11 | ESE 11 | ESE 11 | |
198 | 124 | 97 | 80 | 72 | 68 | 68 | 68 | 70 | 40 | 39 | 35 | 35 | 49 | 47 | 47 | 46 | 48 | 78 | 75 | 95 | 93 | 95 | 123 | |
Wind (km/h) | ||||||||||||||||||||||||
glassy | glassy | glassy | glassy | glassy | glassy | glassy | glassy | cross-off | cross-off | cross-off | glassy | cross-on | off | off | off | off | glassy | on | on | glassy | off | off | off | |
High Tide | 3:30AM1.62m | 4:47PM1.59m | 4:01AM1.64m | 5:27PM1.65m | 4:31AM1.67m | 6:04PM1.68m | ||||||||||||||||||
Low Tide | 10:10AM0.40m | 10:21PM0.89m | 10:44AM0.30m | 10:58PM0.91m | 11:17AM0.23m | 11:33PM0.93m | ||||||||||||||||||
 | |  | | |  |  | |  | | | | | | | | | | | | | | | | |
 | 4:58 | — | — | — | — | — | — | 4:56 | — | — | — | — | — | — | — | 4:56 | — | — | — | — | — | — | — | 4:56 |
 | — | — | — | — | 7:07 | — | — | — | — | — | — | — | 7:07 | — | — | — | — | — | — | — | 7:07 | — | — | 7:08 |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Temp °C | 23 | 23 | 24 | 25 | 25 | 23 | 23 | 23 | 22 | 26 | 28 | 28 | 26 | 22 | 20 | 19 | 18 | 23 | 24 | 24 | 23 | 20 | 19 | 19 |
26 | 26 | 28 | 30 | 30 | 27 | 27 | 26 | 24 | 26 | 29 | 29 | 28 | 22 | 20 | 19 | 17 | 22 | 23 | 23 | 24 | 21 | 19 | 19 | |
Swell 1 Height (m) Direction Period (s) | ESE 7 | ESE 7 | S 7 | E 8 | S 7 | S 6 | S 6 | S 6 | S 7 | SSW 7 | SW 6 | SW 7 | SW 7 | SW 6 | E 10 | E 10 | E 10 | E 10 | E 10 | E 10 | ESE 11 | ESE 11 | ESE 11 | ESE 11 |
 kJ | 198 | 124 | 97 | 80 | 72 | 68 | 68 | 68 | 70 | 40 | 34 | 21 | 22 | 21 | 47 | 47 | 46 | 48 | 78 | 75 | 95 | 93 | 95 | 123 |
Swell 2 Height (m) Direction Period (s) | SSW 7 | SSW 7 | ESE 7 | SSW 7 | E 8 | E 8 | E 8 | E 8 | ESE 8 | SSE 6 | SSE 6 | SSE 6 | SSE 6 | E 10 | SSE 6 | SSE 6 | ENE 5 | ENE 5 | SSE 6 | S 6 | E 4 | S 5 | S 15 | SSE 14 |
| kJ | 108 | 105 | 84 | 54 | 63 | 46 | 45 | 33 | 22 | 25 | 20 | 15 | 13 | 49 | 11 | 6 | 6 | 6 | 6 | 5 | 1 | 2 | 18 | 67 |
Swell 3 Height (m) Direction Period (s) | SE 10 | SE 10 | ESE 10 | SSE 6 | SE 10 | SE 9 | SE 9 | SE 10 | SE 10 | E 8 | ESE 10 | E 8 | E 11 | SSE 6 | ESE 12 | ESE 12 | ESE 12 | ESE 12 | SE 9 | SE 7 | SE 9 | SE 9 | SE 9 | S 17 |
| kJ | 25 | 16 | 9 | 22 | 23 | 23 | 22 | 23 | 23 | 21 | 39 | 23 | 35 | 14 | 29 | 29 | 29 | 29 | 3 | 2 | 3 | 3 | 3 | 51 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | NNW 3 | SW 7 | — | W 4 | NNW 2 | ENE 4 | ENE 5 | — | — | ENE 4 | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | 1 | 35 | — | 15 | 1 | 5 | 33 | — | — | 3 | — | — | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 51 | 0 | 0 | 0 | 0 | 0 | 330 | 539 | 0 | 0 | 0 | 0 |
Best forecast wave conditions in Shikoku | ||||||||||||||||||||||||
Best forecast wave conditions in Japan | ||||||||||||||||||||||||
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