Surf Forecasts:
Asakawa surf forecast from 13 Aug 2026:
- Best quality surf: Friday 14 Aug, 9AM (local time) - 2.5ft (0.7m), 9s period, S swell with glassy winds.
- Most powerful swell: Friday 21 Aug, 9AM (local time) - 3.5ft (1.0m), 10s period, S swell with 208 kJ wave energy.
- Next surfable swell (1★+): Friday 14 Aug, 9AM (local time) - 2.5ft (0.7m), 9s period with S 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 Friday (Aug 14) at 9AM. The primary swell is predicted to be 0.7m and 9s period with a secondary swell of 0.4m and 9s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Asakawa in the next 16 days are 1.0m 10s and forecast to arrive on Friday (Aug 21) at 9AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 3s period and expected on Friday (Aug 21) at 9AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9AM (Fri 14th Aug) | 2.5ft (0.7m) 9s |
| Best Surf | 9AM (Fri 14th Aug) | 2.5ft (0.7m) 9s |
| Most Powerful | 9AM (Fri 21st Aug) | 3.5ft (1.0m) 10s |
Table - best surf conditions forecast for Asakawa over the next 16 days.
Short Range ForecastHeavy rain (total 37mm), heaviest during Sat night. Warm (max 29°C on Sat morning, min 24°C on Fri night). Wind will be generally light. | Days 4-6 Weather SummaryModerate rain (total 13mm), heaviest on Mon night. Warm (max 29°C on Tue morning, min 25°C on Mon night). Wind will be generally light. | ||||||||||||||||||||
Friday 14 | Saturday 15 | Sunday 16 | Monday 17 | Tuesday 18 | Wednesday 19 | Thursday 20 | |||||||||||||||
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) | S 9 | S 9 | S 8 | S 10 | S 9 | ESE 5 | ESE 5 | ESE 6 | ESE 6 | ESE 5 | ESE 9 | ESE 9 | ESE 10 | E 10 | SE 10 | SE 7 | ESE 7 | ESE 8 | SE 8 | SE 10 | S 11 |
Wave Graph  | |||||||||||||||||||||
 kJ | 73 | 73 | 52 | 94 | 79 | 59 | 80 | 150 | 100 | 51 | 113 | 96 | 74 | 46 | 27 | 44 | 70 | 95 | 57 | 32 | 112 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | cross-on | cross-off | glassy | on | cross-on | cross-on | cross-on | cross-on | cross-on | on | cross-on | glassy | on | glassy | cross-off | cross-on | glassy | cross-on | on | cross-on |
High Tide | 7:22PM1.83m | 7:07AM1.87m | 7:49PM1.81m | 7:49AM1.78m | 8:14PM1.77m | 8:31AM1.66m | 8:38PM1.72m | 9:14AM1.51m | 9:01PM1.65m | 10:05AM1.37m | 9:25PM1.57m | 11:17AM1.25m | 9:52PM1.48m | ||||||||
Low Tide | 12:56PM0.09m | 1:12AM0.56m | 1:30PM0.22m | 1:48AM0.49m | 2:00PM0.39m | 2:24AM0.47m | 2:29PM0.58m | 3:02AM0.48m | 2:55PM0.76m | 3:42AM0.53m | 3:19PM0.92m | 4:31AM0.59m | 3:42PM1.07m | ||||||||
 |  |  |  | |  | | | | | | | | |  | | |  | | | | |
 | 5:22 | — | — | 5:22 | — | — | 5:24 | — | — | 5:24 | — | — | 5:26 | — | — | 5:26 | — | — | 5:26 | — | — |
 | — | 6:51 | — | — | 6:49 | — | — | 6:47 | — | — | 6:46 | — | — | 6:45 | — | — | 6:45 | — | — | 6:44 | — |
mm | 1 | 2 | — | — | 1 | 14 | 7 | 4 | 8 | 2 | 1 | 6 | — | 1 | — | — | 1 | 2 | 2 | 2 | 7 |
Temp °C | 28 | 28 | 25 | 29 | 29 | 25 | 26 | 27 | 25 | 27 | 28 | 26 | 29 | 29 | 26 | 28 | 28 | 26 | 28 | 28 | 26 |
Feels °C | 30 | 30 | 29 | 32 | 31 | 29 | 29 | 30 | 28 | 31 | 31 | 30 | 33 | 32 | 31 | 31 | 33 | 31 | 33 | 33 | 31 |
Swell 1 Height (m) Direction Period (s) | S 9 | S 9 | S 8 | S 10 | S 9 | S 9 | S 8 | S 9 | S 8 | ESE 5 | ESE 9 | ESE 9 | ESE 10 | SE 4 | ESE 5 | SE 7 | ESE 7 | ESE 8 | SE 8 | ESE 8 | S 11 |
| kJ | 73 | 73 | 52 | 94 | 79 | 56 | 51 | 40 | 35 | 51 | 113 | 96 | 74 | 10 | 21 | 44 | 61 | 95 | 57 | 32 | 112 |
Swell 2 Height (m) Direction Period (s) | ESE 9 | ESE 9 | S 11 | E 10 | E 10 | ESE 9 | E 10 | ESE 10 | ESE 10 | S 8 | SSW 8 | SSW 8 | SSW 8 | E 10 | SE 10 | SE 10 | SE 10 | ESE 10 | SE 10 | SE 10 | SE 7 |
| kJ | 28 | 17 | 37 | 30 | 30 | 27 | 53 | 35 | 31 | 34 | 21 | 21 | 20 | 46 | 27 | 27 | 46 | 10 | 23 | 25 | 41 |
Swell 3 Height (m) Direction Period (s) | SE 11 | SE 11 | E 9 | SSE 8 | SE 8 | SE 12 | SE 12 | SE 11 | SE 11 | SE 11 | SE 11 | SE 11 | SE 11 | SSW 8 | SSW 8 | SSW 8 | SSW 8 | S 9 | SSW 9 | S 9 | SE 11 |
| kJ | 20 | 19 | 27 | 6 | 10 | 22 | 49 | 45 | 43 | 42 | 30 | 30 | 29 | 20 | 12 | 12 | 12 | 7 | 25 | 28 | 29 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | E 4 | ESE 5 | ESE 5 | ESE 6 | ESE 6 | — | — | SE 4 | — | — | — | — | ESE 6 | — | — | — | — |
| kJ | — | — | — | — | 9 | 59 | 80 | 150 | 100 | — | — | 15 | — | — | — | — | 70 | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 11 | 0 | 0 | 19 | 43 | 285 | 385 | 43 | 43 | 385 | 43 | 0 | 43 | 1 | 0 | 19 | 0 | 19 | 19 | 43 |
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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