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Surf Forecasts:
Niyodo Rivermouth surfForecast / Shikoku / Japan
48hr Weather and Surf, issued 2 am Friday 29 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 (29 May):
- Morning surf: Morning surf (29 May, local time) - 2.5ft (0.7m), 7s period with SSW swell.
- Afternoon surf: Afternoon surf (29 May, local time) - 1.5ft (0.4m), 8s period with E swell.
- Evening surf: Evening surf (29 May, local time) - 1.5ft (0.5m), 10s period with E swell.
The current surf forecast for Niyodo Rivermouth at 9AM is: 0.7m 7s primary swell from a South-southwest direction and 0.5m 6s secondary swell from a South-southeast direction (forecast issued at 02:00am May 29). An open ocean swell of 0.3m 2s is not directed at the surf break. The wind direction is predicted to be cross-offshore.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (29 May) | 2.5ft (0.7m) | 7s |
| Afternoon (29 May) | 1.5ft (0.4m) | 8s |
| Evening (29 May) | 1.5ft (0.5m) | 10s |
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. | ||||||||||||||||||||||||
Friday 29 | Saturday 30 | Sunday 31 | ||||||||||||||||||||||
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 |    |    |    | |||||||||||||||||||||
S 6 | S 6 | SSW 6 | SSW 7 | SSW 7 | E 8 | ESE 10 | E 10 | E 10 | E 10 | E 10 | E 10 | E 12 | ESE 10 | E 11 | ESE 11 | ESE 11 | S 16 | S 15 | S 14 | S 13 | S 13 | S 13 | S 12 | |
68 | 66 | 68 | 38 | 39 | 22 | 33 | 49 | 47 | 47 | 46 | 48 | 98 | 83 | 89 | 95 | 107 | 188 | 294 | 411 | 609 | 673 | 736 | 690 | |
Wind (km/h) | ||||||||||||||||||||||||
glassy | cross-off | off | cross-off | cross-off | glassy | cross-on | glassy | off | off | off | glassy | on | on | glassy | glassy | off | off | off | glassy | on | on | glassy | glassy | |
High Tide | 4:01AM1.64m | 5:27PM1.65m | 4:31AM1.67m | 6:04PM1.68m | 5:02AM1.68m | 6:40PM1.69m | ||||||||||||||||||
Low Tide | 10:21PM0.89m | 10:44AM0.30m | 10:58PM0.91m | 11:17AM0.23m | 11:33PM0.93m | 11:50AM0.19m | ||||||||||||||||||
 | |  | | | | |  | | | | | | |  |  | | |  | | | | | | |
 | — | 4:56 | — | — | — | — | — | — | — | 4:56 | — | — | — | — | — | — | — | 4:56 | — | — | — | — | — | — |
 | — | — | — | — | — | — | 7:07 | — | — | — | — | — | — | — | 7:07 | — | — | — | — | — | — | — | 7:08 | — |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Temp °C | 23 | 23 | 22 | 26 | 28 | 28 | 25 | 22 | 20 | 19 | 18 | 24 | 24 | 24 | 23 | 22 | 21 | 20 | 20 | 24 | 25 | 25 | 24 | 22 |
26 | 26 | 23 | 26 | 28 | 29 | 27 | 24 | 20 | 18 | 16 | 24 | 23 | 24 | 25 | 24 | 22 | 21 | 20 | 25 | 25 | 26 | 26 | 24 | |
Swell 1 Height (m) Direction Period (s) | S 6 | S 6 | SSW 6 | SSW 7 | SSW 7 | SW 6 | ESE 10 | SE 6 | SE 6 | E 10 | E 10 | E 10 | E 12 | ESE 10 | E 11 | ESE 11 | ESE 11 | ESE 11 | S 15 | S 14 | S 13 | S 13 | S 13 | S 12 |
 kJ | 68 | 66 | 68 | 38 | 29 | 20 | 33 | 21 | 16 | 47 | 46 | 48 | 98 | 83 | 89 | 95 | 107 | 135 | 294 | 411 | 609 | 673 | 736 | 690 |
Swell 2 Height (m) Direction Period (s) | E 8 | E 8 | E 8 | SSE 6 | SSE 6 | E 8 | SSE 6 | E 10 | E 10 | SSE 6 | SSE 6 | SSE 6 | SSE 6 | SSE 6 | SSE 5 | SSE 5 | S 17 | S 16 | ESE 11 | ESE 11 | ESE 11 | E 10 | E 10 | S 16 |
| kJ | 45 | 34 | 34 | 21 | 14 | 22 | 11 | 49 | 47 | 13 | 10 | 6 | 6 | 6 | 6 | 3 | 52 | 188 | 123 | 135 | 121 | 80 | 74 | 264 |
Swell 3 Height (m) Direction Period (s) | SE 9 | SE 10 | ESE 10 | ESE 8 | ESE 10 | ESE 12 | SW 6 | SW 6 | SW 6 | ESE 12 | ESE 12 | ESE 12 | SE 9 | SW 6 | SE 9 | SE 9 | SE 9 | SE 9 | SSE 9 | — | — | — | SE 12 | E 10 |
| kJ | 22 | 15 | 9 | 22 | 39 | 15 | 10 | 10 | 10 | 29 | 28 | 29 | 3 | 1 | 3 | 3 | 3 | 3 | 8 | — | — | — | 22 | 74 |
Wind waves Height (m) Direction Period (s) | — | — | — | NW 2 | — | SSE 6 | ESE 3 | ENE 4 | ENE 4 | NE 4 | — | — | E 3 | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | 1 | — | 14 | 6 | 3 | 5 | 14 | — | — | 1 | — | — | — | — | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 0 | 0 | 0 | 61 | 0 | 0 | 0 | 0 | 0 | 330 | 51 | 0 | 0 | 0 | 0 | 0 | 0 | 103 | 51 | 0 | 0 |
Best forecast wave conditions in Shikoku | ||||||||||||||||||||||||
Best forecast wave conditions in Japan | ||||||||||||||||||||||||
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