Surf Forecasts:
Asakawa surf forecast from 1 Sep 2026:
- Best quality surf: Tuesday 8 Sep, 6AM (local time) - 15ft (4.5m), 11s period, SE swell with offshore winds.
- Most powerful swell: Tuesday 8 Sep, 9AM (local time) - 15ft (4.5m), 11s period, ESE swell with 5,183 kJ wave energy.
- Next surfable swell (1★+): Wednesday 2 Sep, 6PM (local time) - 3.5ft (1.1m), 9s period with SSE 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 Wednesday (Sep 02) at 6PM. The primary swell is predicted to be 1.1m and 9s period with a secondary swell of 0.5m and 11s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Asakawa in the next 16 days are 4.5m 11s and forecast to arrive on Tuesday (Sep 08) at 9AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 5s period and expected on Tuesday (Sep 08) at 12PM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6PM (Wed 2nd Sep) | 3.5ft (1.1m) 9s |
| Best Surf | 6AM (Tue 8th Sep) | 15ft (4.5m) 11s |
| Most Powerful | 9AM (Tue 8th Sep) | 15ft (4.5m) 11s |
Table - best surf conditions forecast for Asakawa over the next 16 days.
Short Range ForecastHeavy rain (total 184mm), heaviest during Thu night. Warm (max 30°C on Wed morning, min 22°C on Thu afternoon). Wind will be generally light. | Days 4-6 Weather SummaryHeavy rain (total 324mm), heaviest during Mon morning. Warm (max 24°C on Sat morning, min 22°C on Sun morning). Wind will be generally light. | ||||||||||||||||||||
Wednesday 2 | Thursday 3 | Friday 4 | Saturday 5 | Sunday 6 | Monday 7 | Tuesday 8 | |||||||||||||||
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) | SSE 9 | SSE 9 | SSE 8 | SSE 8 | SSE 10 | S 10 | S 9 | SSE 9 | SE 8 | ESE 7 | ESE 7 | ESE 8 | ESE 9 | ESE 9 | ESE 9 | ESE 8 | ESE 8 | SE 10 | SE 11 | SE 11 | SE 11 |
Wave Graph  | |||||||||||||||||||||
 kJ | 189 | 206 | 164 | 147 | 300 | 459 | 440 | 432 | 543 | 297 | 193 | 372 | 1739 | 2073 | 1175 | 1268 | 887 | 2821 | 5183 | 2738 | 1882 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | on | glassy | cross-off | off | cross-off | cross-off | cross-off | cross-on | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | off | cross-off | off | cross-off | cross-off | off |
High Tide | 8:30PM1.72m | 9:51AM1.47m | 9:02PM1.65m | 11:18AM1.35m | 9:43PM1.56m | 1:51PM1.33m | 11:00PM1.46m | 3:35PM1.46m | 1:17AM1.44m | 4:19PM1.58m | 2:54AM1.54m | 4:52PM1.68m | |||||||||
Low Tide | 2:32PM0.75m | 3:16AM0.36m | 3:06PM0.93m | 4:13AM0.42m | 3:51PM1.11m | 5:37AM0.48m | 5:35PM1.26m | 7:28AM0.46m | 8:34PM1.23m | 8:55AM0.35m | 9:45PM1.08m | 9:55AM0.25m | 10:28PM0.91m | ||||||||
 | |  |  |  |  | | |  |  |  | | | | | | |  |  | | | |
 | 5:35 | — | — | 5:37 | — | — | 5:37 | — | — | 5:37 | — | — | 5:39 | — | — | 5:39 | — | — | 5:39 | — | — |
 | — | 6:28 | — | — | 6:25 | — | — | 6:24 | — | — | 6:23 | — | — | 6:22 | — | — | 6:21 | — | — | 6:19 | — |
mm | — | — | 8 | 8 | 33 | 65 | 50 | 16 | 4 | 1 | 2 | 8 | 30 | 57 | 95 | 118 | 13 | — | — | — | 15 |
Temp °C | 30 | 30 | 27 | 25 | 23 | 24 | 23 | 23 | 23 | 24 | 24 | 24 | 23 | 23 | 23 | 23 | 24 | 24 | 28 | 28 | 25 |
Feels °C | 33 | 33 | 32 | 29 | 26 | 27 | 25 | 26 | 25 | 26 | 26 | 26 | 25 | 23 | 23 | 23 | 24 | 25 | 27 | 28 | 25 |
Swell 1 Height (m) Direction Period (s) | SSE 9 | SSE 9 | SSE 8 | SSE 8 | SSE 10 | S 10 | S 9 | SSE 9 | SSW 9 | SSW 10 | ESE 7 | ESE 8 | SSW 8 | SSW 9 | SSW 9 | SSW 9 | SSW 8 | SW 8 | SE 11 | SE 11 | SE 11 |
| kJ | 189 | 206 | 164 | 147 | 300 | 459 | 440 | 432 | 76 | 122 | 193 | 372 | 40 | 31 | 25 | 61 | 24 | 18 | 4472 | 2738 | 1882 |
Swell 2 Height (m) Direction Period (s) | E 11 | E 11 | ESE 11 | ESE 10 | ESE 10 | ESE 10 | ESE 6 | ESE 7 | SSW 10 | E 16 | SSW 10 | SSW 9 | — | — | — | — | — | — | — | ESE 15 | S 10 |
| kJ | 61 | 58 | 37 | 33 | 33 | 18 | 33 | 69 | 142 | 5 | 132 | 99 | — | — | — | — | — | — | — | 123 | 49 |
Swell 3 Height (m) Direction Period (s) | SE 10 | SE 11 | SE 11 | SE 10 | SE 10 | SE 10 | E 9 | ESE 7 | E 15 | E 16 | — | — | — | — | — | — | — | — | — | S 10 | SSW 7 |
| kJ | 17 | 18 | 18 | 16 | 25 | 16 | 7 | 57 | 4 | 5 | — | — | — | — | — | — | — | — | — | 48 | 18 |
Wind waves Height (m) Direction Period (s) | — | — | E 4 | E 4 | NNE 2 | NE 4 | NNE 4 | NNE 4 | SE 8 | ESE 7 | NNE 3 | NNE 4 | ESE 9 | ESE 9 | ESE 9 | ESE 8 | ESE 8 | SE 10 | ESE 11 | N 5 | N 4 |
| kJ | — | — | 14 | 9 | 1 | 12 | 21 | 6 | 543 | 297 | 3 | 5 | 1739 | 2073 | 1175 | 1268 | 887 | 2821 | 5183 | 29 | 10 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 43 | 19 | 0 | 0 | 0 | 0 | 22 | 0 | 376 | 0 | 0 | 0 | 22 | 57 | 43 | 43 | 43 | 0 | 43 | 43 | 0 |
Best forecast wave conditions in Shikoku | |||||||||||||||||||||
Best forecast wave conditions in Japan | |||||||||||||||||||||
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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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