Surf Forecasts:
Asakawa surf forecast from 23 Aug 2026:
- Best quality surf: Tuesday 25 Aug, 3AM (local time) - 10ft (3.0m), 16s period, SSE swell with glassy winds.
- Most powerful swell: Tuesday 25 Aug, 6AM (local time) - 11ft (3.5m), 15s period, SSE swell with 5,164 kJ wave energy.
- Next surfable swell (1★+): Monday 24 Aug, 3AM (local time) - 2.5ft (0.8m), 13s period with SE swell.
Best Forecast Surf Conditions for Asakawa this week:
The surf forecast for Asakawa over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Monday (Aug 24) at 3AM. The primary swell is predicted to be 0.8m and 13s period with a secondary swell of 0.4m and 8s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Asakawa in the next 16 days are 3.5m 15s and forecast to arrive on Tuesday (Aug 25) at 6AM. Winds are predicted to be glassy at the time the swell arrives.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3AM (Mon 24th Aug) | 2.5ft (0.8m) 13s |
| Best Surf | 3AM (Tue 25th Aug) | 10ft (3.0m) 16s |
| Most Powerful | 6AM (Tue 25th Aug) | 11ft (3.5m) 15s |
Table - best surf conditions forecast for Asakawa over the next 16 days.
Short Range ForecastSome drizzle, heaviest during Tue night. Warm (max 31°C on Sun morning, min 25°C on Mon night). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 9mm), mostly falling on Wed afternoon. Warm (max 30°C on Wed afternoon, min 26°C on Wed night). Wind will be generally light. | ||||||||||||||||||||
Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | Friday 28 | Saturday 29 | |||||||||||||||
AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Swell Height Map |  |  |  |  |  |  |  | ||||||||||||||
Wave Height (m) Direction Period (s) | SSW 8 | SE 13 | SE 12 | SE 19 | SE 16 | SSE 16 | SSE 15 | SSE 14 | S 14 | S 13 | S 13 | SSW 12 | SSW 11 | SSE 9 | SSE 9 | S 10 | S 11 | S 10 | S 9 | S 9 | S 8 |
Wave Graph  | |||||||||||||||||||||
 kJ | 54 | 45 | 152 | 1254 | 2357 | 4678 | 4644 | 4094 | 3376 | 2570 | 1445 | 660 | 192 | 328 | 233 | 377 | 595 | 612 | 313 | 215 | 137 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | cross-on | cross | glassy | on | cross | on | on | glassy | glassy | cross-on | cross | glassy | cross-on | cross | glassy | cross-on | cross-off | glassy | cross-on | cross |
High Tide | 4:43PM1.42m | 2:31AM1.38m | 5:04PM1.52m | 3:35AM1.49m | 5:25PM1.60m | 4:20AM1.60m | 5:47PM1.67m | 4:59AM1.70m | 6:08PM1.73m | 5:36AM1.78m | 6:30PM1.78m | 6:12AM1.83m | 6:52PM1.81m | ||||||||
Low Tide | 9:51PM1.18m | 9:51AM0.47m | 10:27PM1.07m | 10:31AM0.36m | 10:55PM0.96m | 11:05AM0.27m | 11:22PM0.84m | 11:35AM0.21m | 11:50PM0.72m | 12:05PM0.20m | 00:18AM0.60m | 12:33PM0.23m | 00:48AM0.49m | ||||||||
 | |  | | | | | |  |  |  | | | |  |  | | | | |  | |
 | 5:28 | — | — | 5:30 | — | — | 5:30 | — | — | 5:31 | — | — | 5:31 | — | — | 5:31 | — | — | 5:33 | — | — |
 | — | 6:39 | — | — | 6:38 | — | — | 6:37 | — | — | 6:37 | — | — | 6:35 | — | — | 6:34 | — | — | 6:32 | — |
mm | — | — | — | — | — | — | — | — | 1 | — | 2 | 1 | 1 | 1 | — | 1 | 2 | 1 | — | 3 | 6 |
Temp °C | 31 | 30 | 27 | 30 | 30 | 26 | 30 | 30 | 26 | 29 | 30 | 27 | 29 | 29 | 26 | 29 | 30 | 26 | 30 | 30 | 27 |
Feels °C | 34 | 33 | 32 | 33 | 34 | 31 | 33 | 33 | 31 | 34 | 34 | 32 | 32 | 33 | 29 | 32 | 33 | 30 | 34 | 34 | 32 |
Swell 1 Height (m) Direction Period (s) | SSW 8 | S 8 | SE 12 | SE 19 | SE 16 | SSE 16 | SSE 15 | SSE 14 | S 14 | S 13 | S 13 | SSW 12 | SSE 8 | SSE 9 | SSE 9 | S 10 | S 11 | S 10 | S 9 | S 9 | S 8 |
| kJ | 54 | 30 | 152 | 1254 | 2357 | 4678 | 4644 | 4094 | 3376 | 2570 | 1445 | 660 | 192 | 328 | 233 | 377 | 595 | 612 | 313 | 215 | 137 |
Swell 2 Height (m) Direction Period (s) | ESE 11 | SE 13 | SSW 9 | S 8 | SSW 8 | E 11 | E 11 | E 14 | E 13 | SE 9 | SE 9 | SSE 9 | SSW 11 | SSW 10 | SSW 9 | ESE 10 | SE 7 | ESE 9 | SW 11 | SW 11 | SW 11 |
| kJ | 38 | 45 | 30 | 21 | 21 | 10 | 10 | 16 | 32 | 166 | 241 | 202 | 183 | 63 | 135 | 18 | 121 | 16 | 20 | 31 | 32 |
Swell 3 Height (m) Direction Period (s) | ESE 6 | ESE 11 | S 8 | SW 9 | S 8 | E 16 | E 15 | — | — | E 13 | E 13 | E 12 | S 9 | E 11 | E 11 | SE 14 | SE 14 | SSE 12 | SE 13 | ESE 9 | SE 11 |
| kJ | 3 | 23 | 21 | 13 | 11 | 20 | 17 | — | — | 30 | 29 | 25 | 41 | 10 | 9 | 8 | 8 | 15 | 26 | 8 | 20 |
Wind waves Height (m) Direction Period (s) | — | SSW 2 | — | — | — | — | — | — | — | — | — | — | — | — | — | SE 6 | — | — | — | — | SE 7 |
| kJ | — | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | 115 | — | — | — | — | 27 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 11 | 2 | 0 | 11 | 2 | 11 | 11 | 0 | 0 | 11 | 2 | 0 | 11 | 2 | 0 | 11 | 0 | 0 | 11 | 2 |
Best forecast wave conditions in Shikoku | |||||||||||||||||||||
Best forecast wave conditions in Japan | |||||||||||||||||||||
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FREE! Surf-Forecast.com widget for your website
The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Asakawa surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.
Information about the Asakawa Surf forecast
The above surf forecast table for Asakawa provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Asakawa can be found by selecting the local surf guide option on the grey menu. Our Asakawa surf forecast is unique since it includes wave energy (power) that defines the real feel of the surf rather than just the height or the period. If you surf the same spot (Asakawa) regularly then make a mental note of the wave energy from the surf forecast table each time you go. Very soon you may start to choose your surf days based on the wave energy alone combined with our forecast of favourable offshore wind conditions. Our star ratings will help here and of course you will also find the usual wave height and period predictions on our surf forecasts as well as a full break down of the swell components under our advanced users option (to reveal that, click the little Einstein character under the tide times).
Further information to help with frequently asked questions about our surf forecast for Asakawa may be found under the help tab on the top menu and also by moving your mouse over the question marks on the surf forecast table itself. Please always bear in mind that the forecast is for near-shore open water and local factors at each surf break influence the actual breaking wave height, such as the beach / reef profile, water depths offshore and shelter.
Are you planning a holiday in Shikoku? If you are looking for accommodation near Asakawa, camping, hotels and holiday cottages in Shikoku, consider staying in Anan which is 41 km (25 miles) away. Other places in and around Shikoku where you can find information about places to rent, and car hire include Muroto which is 44 km (27 miles) away, Komatsushima, Aki and Kamojima.
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