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Surf Forecasts:
Asakawa surfForecast / Shikoku / Japan
48hr Weather and Surf, issued 2 am Monday 18 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
20.9° C
(Which is normal for this time of year)How big are the waves at Asakawa today?
The current surf forecast for Asakawa at 6AM is: 0.7m 9s primary swell from a East-southeast direction and 0.3m 12s secondary swell from a Southeast direction (forecast issued at 02:00am May 18). The wind direction is predicted to be cross-offshore.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (18 May) | 2.5ft (0.7m) | 9s |
| Afternoon (18 May) | 2.5ft (0.8m) | 9s |
| Evening (18 May) | 2.5ft (0.7m) | 9s |
Table - waves today at Asakawa. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastModerate rain (total 17mm), heaviest on Tue night. Warm (max 25°C on Mon morning, min 18°C on Mon night). Wind will be generally light. | ||||||||||||||||||||||||
Monday 18 | Tuesday 19 | Wednesday 20 | ||||||||||||||||||||||
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 |    |    |    | |||||||||||||||||||||
ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | SE 10 | SE 11 | ESE 11 | ESE 11 | ESE 11 | SE 10 | SE 10 | SE 10 | ESE 10 | SE 10 | ESE 10 | |
68 | 70 | 71 | 71 | 68 | 86 | 68 | 68 | 88 | 130 | 130 | 133 | 135 | 160 | 163 | 143 | 143 | 143 | 160 | 157 | 151 | 130 | 145 | 125 | |
Wind (km/h) | ||||||||||||||||||||||||
cross-off | cross-off | cross-off | glassy | on | on | cross-on | glassy | glassy | glassy | cross-off | on | on | on | cross-on | glassy | glassy | glassy | glassy | glassy | glassy | cross-on | glassy | glassy | |
High Tide | 5:51AM1.87m | 7:42PM1.81m | 6:32AM1.85m | 8:35PM1.73m | 7:15AM1.79m | |||||||||||||||||||
Low Tide | 00:19AM0.89m | 12:46PM-0.12m | 1:03AM0.96m | 1:34PM-0.08m | 1:48AM1.03m | 2:24PM0.03m | ||||||||||||||||||
 | |  | | | | | | | | | | |  | |  |  | |  | | | |  | | |
 | — | 5:00 | — | — | — | — | — | — | — | 4:58 | — | — | — | — | — | — | — | 4:58 | — | — | — | — | — | — |
 | — | — | — | — | — | — | 6:57 | — | — | — | — | — | — | — | 6:58 | — | — | — | — | — | — | — | 6:59 | — |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 5 | 4 | 4 | 2 | 2 | — | |
Temp °C | 20 | 19 | 19 | 24 | 25 | 25 | 23 | 20 | 19 | 18 | 18 | 22 | 24 | 24 | 22 | 20 | 20 | 20 | 20 | 21 | 22 | 22 | 23 | 22 |
20 | 19 | 19 | 24 | 24 | 24 | 24 | 21 | 20 | 19 | 18 | 21 | 23 | 24 | 22 | 22 | 22 | 22 | 23 | 25 | 26 | 25 | 26 | 25 | |
Swell 1 Height (m) Direction Period (s) | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | SE 10 | SE 11 | ESE 11 | ESE 11 | ESE 11 | SE 10 | SE 10 | SE 10 | ESE 10 | S 6 | S 6 |
 kJ | 68 | 70 | 71 | 71 | 68 | 86 | 68 | 68 | 88 | 130 | 130 | 133 | 135 | 160 | 163 | 143 | 143 | 143 | 160 | 157 | 151 | 130 | 101 | 116 |
Swell 2 Height (m) Direction Period (s) | SE 12 | SE 12 | SE 12 | SE 12 | SE 12 | SE 10 | SE 12 | SE 11 | SE 4 | SE 4 | SE 10 | — | — | — | — | SSE 6 | SSE 7 | SSE 6 | SSE 5 | — | — | — | SE 10 | ESE 10 |
| kJ | 22 | 24 | 23 | 23 | 6 | 4 | 21 | 32 | 3 | 3 | 27 | — | — | — | — | 17 | 26 | 25 | 20 | — | — | — | 145 | 125 |
Swell 3 Height (m) Direction Period (s) | — | SE 10 | SE 10 | SE 10 | SE 10 | SE 12 | ESE 10 | SE 4 | SE 11 | SE 4 | ESE 10 | — | — | — | — | — | S 9 | — | S 8 | — | — | — | — | — |
| kJ | — | 4 | 4 | 4 | 4 | 6 | 19 | 3 | 31 | 3 | 21 | — | — | — | — | — | 2 | — | 6 | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | SE 3 | SE 3 | SE 4 | — | — | — | — | — | — | — | — | — | — | — | SSE 7 | SSE 6 | SSE 6 | — | — |
| kJ | — | — | — | — | — | 1 | 2 | 4 | — | — | — | — | — | — | — | — | — | — | — | 62 | 54 | 89 | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 0 | 385 | 11 | 11 | 0 | 0 | 0 | 0 | 11 | 11 | 11 | 11 | 0 | 0 | 0 | 0 | 0 | 0 | 11 | 0 | 0 |
Best forecast wave conditions in Shikoku | ||||||||||||||||||||||||
Best forecast wave conditions in Japan | ||||||||||||||||||||||||
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