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Surf Forecasts:
Asakawa surfForecast / Shikoku / Japan
48hr Weather and Surf, issued 2 pm Sunday 31 May 2026 JSTForecast update in hr min s Forecast update imminent
Asakawa surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Asakawa sea temperature is
22.5° C
(Which is normal for this time of year)How big are the waves at Asakawa today (31 May):
- Afternoon surf: Afternoon surf (31 May, local time) - 4ft (1.2m), 12s period with S swell.
- Evening surf: Evening surf (31 May, local time) - 4ft (1.2m), 12s period with S swell.
The current surf forecast for Asakawa at 10PM is: 1.2m 12s primary swell from a South direction and 0.5m 15s secondary swell from a South direction, 1.5m 6s secondary swell from a South-southeast direction (forecast issued at 02:00pm May 31). The wind direction is predicted to be cross-onshore.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (31 May) | - | - |
| Afternoon (31 May) | 4ft (1.2m) | 12s |
| Evening (31 May) | 4ft (1.2m) | 12s |
Table - waves today at Asakawa. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastHeavy rain (total 274mm), heaviest during Tue night. Warm (max 27°C on Sun afternoon, min 19°C on Sun night). Winds increasing (calm on Sun night, near gales from the N by Wed morning). | ||||||||||||||||||||||||
Sun 31 | Monday 1 | Tuesday 2 | Wed 3 | |||||||||||||||||||||
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 13 | S 12 | S 12 | S 12 | S 11 | S 11 | S 14 | S 13 | S 14 | S 14 | S 14 | S 14 | S 14 | S 14 | S 13 | SSW 13 | SSW 13 | SSW 14 | SSW 14 | SSW 14 | ESE 9 | ESE 10 | SSW 14 | S 14 | |
319 | 423 | 638 | 396 | 305 | 235 | 474 | 569 | 1161 | 1081 | 1161 | 1594 | 1617 | 1599 | 1419 | 1249 | 1155 | 1336 | 1578 | 1724 | 2930 | 7350 | 9953 | 10078 | |
Wind (km/h) | ||||||||||||||||||||||||
glassy | on | cross-on | cross-on | cross-on | cross | glassy | on | on | on | on | on | on | glassy | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross | cross-off | cross-off | cross-off | |
High Tide | 6:39PM1.66m | 5:28AM1.69m | 7:15PM1.65m | 6:00AM1.68m | 7:51PM1.62m | 6:34AM1.67m | ||||||||||||||||||
Low Tide | 00:00AM0.97m | 12:22PM0.16m | 00:33AM0.98m | 12:57PM0.18m | 1:07AM1.00m | |||||||||||||||||||
 |  |  |  | |  | | | | | |  |  | |  |  |  | | |  | | | | | |
 | — | — | — | — | — | 4:52 | — | — | — | — | — | — | — | 4:52 | — | — | — | — | — | — | — | 4:52 | — | — |
 | — | — | 7:06 | — | — | — | — | — | — | — | 7:07 | — | — | — | — | — | — | — | 7:07 | — | — | — | — | 7:07 |
— | — | — | — | — | — | — | — | — | — | — | — | 3 | 4 | 2 | 6 | 12 | 13 | 12 | 20 | 32 | 68 | 69 | 24 | |
Temp °C | 26 | 27 | 23 | 20 | 19 | 19 | 19 | 23 | 24 | 23 | 22 | 21 | 20 | 19 | 20 | 20 | 21 | 21 | 21 | 21 | 22 | 21 | 21 | 21 |
27 | 27 | 22 | 20 | 19 | 21 | 21 | 24 | 24 | 24 | 24 | 23 | 22 | 21 | 22 | 20 | 21 | 21 | 20 | 19 | 19 | 17 | 14 | 13 | |
Swell 1 Height (m) Direction Period (s) | S 13 | S 12 | ESE 10 | S 12 | SSE 7 | SSE 7 | S 14 | S 13 | S 14 | S 14 | S 14 | S 14 | S 14 | S 14 | S 13 | SSW 13 | SSW 13 | SSW 14 | SSW 14 | SSW 14 | SSW 15 | SSW 15 | ESE 11 | S 14 |
 kJ | 319 | 423 | 32 | 396 | 235 | 121 | 474 | 569 | 1161 | 1081 | 1161 | 1594 | 1617 | 1599 | 1419 | 1249 | 1155 | 1336 | 1578 | 1724 | 2445 | 5168 | 8326 | 10078 |
Swell 2 Height (m) Direction Period (s) | ESE 11 | ESE 11 | SE 12 | S 15 | S 11 | S 11 | S 11 | SSW 16 | ESE 10 | ESE 10 | SSW 17 | ESE 11 | ESE 11 | ESE 10 | SE 11 | ESE 10 | ESE 12 | SSW 15 | — | — | — | — | SSW 14 | SE 11 |
| kJ | 85 | 74 | 22 | 118 | 305 | 235 | 235 | 346 | 19 | 19 | 386 | 45 | 45 | 42 | 19 | 19 | 15 | 1042 | — | — | — | — | 9953 | 3084 |
Swell 3 Height (m) Direction Period (s) | SSE 9 | SE 12 | — | ESE 11 | S 15 | ESE 7 | SSE 6 | SSE 6 | SE 11 | SE 11 | ESE 11 | ESE 11 | ESE 9 | ESE 10 | E 9 | ESE 12 | — | — | — | — | — | — | SSE 12 | — |
| kJ | 7 | 23 | — | 51 | 224 | 70 | 55 | 25 | 19 | 19 | 45 | 46 | 17 | 18 | 15 | 14 | — | — | — | — | — | — | 706 | — |
Wind waves Height (m) Direction Period (s) | — | — | S 12 | SSE 6 | — | — | — | — | SE 5 | SE 5 | SE 5 | SE 5 | SE 5 | — | — | ESE 5 | SE 6 | SE 6 | ESE 7 | ESE 8 | ESE 9 | ESE 10 | — | NNE 7 |
| kJ | — | — | 638 | 145 | — | — | — | — | 21 | 15 | 37 | 32 | 28 | — | — | 52 | 159 | 284 | 610 | 1377 | 2930 | 7350 | — | 946 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 0 | 11 | 583 | 11 | 11 | 2 | 0 | 19 | 19 | 19 | 11 | 11 | 11 | 0 | 43 | 57 | 369 | 475 | 581 | 369 | 475 | 473 | 285 | 285 |
Best forecast wave conditions in Shikoku | ||||||||||||||||||||||||
Best forecast wave conditions in Japan | ||||||||||||||||||||||||
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