Surf Forecasts:
Asakawa surf forecast from 9 Aug 2026:
- Best quality surf: Sunday 9 Aug, 6PM (local time) - 3.5ft (1.0m), 13s period, E swell with glassy winds.
- Most powerful swell: Sunday 9 Aug, 9PM (local time) - 3.5ft (1.0m), 13s period, E swell with 339 kJ wave energy.
- Next surfable swell (1★+): Sunday 9 Aug, 6PM (local time) - 3.5ft (1.0m), 13s period with E 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 Sunday (Aug 09) at 6PM. The primary swell is predicted to be 1.0m and 13s period with a secondary swell of 1.1m and 11s. Another secondary swell of 1.0m and 12s is also forecast. 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 13s and forecast to arrive on Sunday (Aug 09) at 9PM. Winds are predicted to be glassy at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.7m 4s period and expected on Tuesday (Aug 11) at 12PM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6PM (Sun 9th Aug) | 3.5ft (1.0m) 13s |
| Best Surf | 6PM (Sun 9th Aug) | 3.5ft (1.0m) 13s |
| Most Powerful | 9PM (Sun 9th Aug) | 3.5ft (1.0m) 13s |
Table - best surf conditions forecast for Asakawa over the next 16 days.
The Lowdown
Alright folks, it’s Rusty here with a look at the Asakawa, Asakawa (point) outlook. The water’s a touch warmer than normal for this time of year at 84°F.
The next 16 days start off with a bit of a tease, but it’s not until the first week is over that things get interesting. The first real standout is a bit of a wildcard. The best surf on offer is the early session on Sunday, August 9th. We’ve got a 4ft SSW groundswell rolling in. The period is a solid 12 seconds, which is going to fatten up those lines nicely. The wind is glassy, and the combined energy reading is moderate at 852. Expect very good surf conditions. Remember, this is an inconsistent point break, so don’t assume it’s pumping every day. The crowd situation is *sometimes* busy, so you might have some company.
The rest of the opening week stays pretty small. We get a few days of surfable but ordinary waves through Tuesday and Wednesday, but nothing that really screams “go”. The swell drops off and the wind angles become a problem. The 18th of August swings back into action with a solid increase in size. The swell is 6ft from the E on Tuesday morning, with a combined energy of 906. The wind is light cross-shore, but the period is a short 10 seconds, and the conditions are described as marginal. It’s not the cleanest, but it’s size. The 19th of August is the biggest day of the forecast, with a 10ft E swell hitting, but it’s also messy with a cross-onshore wind and a very strong combined energy of 2473. That’s expert territory.
The real promising window that’s worth a look is the morning of the 20th of August. The swell drops to a more manageable 4ft from the ESE, and the wind goes glassy again. The combined energy is moderate at 289. It’s a clean, smaller window after the big, choppy stuff. The 22nd and 23rd of August also show promise with good morning glass and a building S swell, around 4ft to 5ft, with periods around 10-11 seconds. The 22nd morning has a moderate energy of 301, and the 23rd morning has a stronger 525. These are the ones to focus on for the second week.
Rusty.
Short Range ForecastLight rain (total 5mm), mostly falling on Sun morning. Warm (max 30°C on Tue morning, min 22°C on Tue night). Wind will be generally light. | Days 4-6 Weather SummaryModerate rain (total 16mm), heaviest on Thu afternoon. Warm (max 28°C on Fri morning, min 23°C on Wed night). Wind will be generally light. | ||||||||||||||||||||
Sunday 9 | Monday 10 | Tuesday 11 | Wednesday 12 | Thursday 13 | Friday 14 | Saturday 15 | |||||||||||||||
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 12 | SSW 12 | S 11 | S 10 | S 10 | S 10 | S 10 | S 10 | S 10 | SSW 10 | SSW 11 | SSW 10 | SSW 9 | SSW 9 | SSW 9 | S 9 | S 9 | S 9 | S 8 | S 9 | S 9 |
Wave Graph  | |||||||||||||||||||||
 kJ | 384 | 378 | 289 | 242 | 190 | 260 | 212 | 212 | 221 | 177 | 161 | 131 | 90 | 86 | 84 | 57 | 57 | 54 | 51 | 59 | 79 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | on | glassy | glassy | glassy | off | cross-off | cross-off | off | glassy | on | on | cross | cross-off | glassy | cross-on | on | glassy | cross | on | off |
High Tide | 4:29PM1.55m | 2:42AM1.58m | 5:14PM1.67m | 3:52AM1.69m | 5:51PM1.75m | 4:49AM1.80m | 6:24PM1.81m | 5:39AM1.88m | 6:54PM1.83m | 6:24AM1.90m | 7:22PM1.83m | 7:07AM1.87m | 7:49PM1.81m | ||||||||
Low Tide | 9:34PM1.16m | 10:02AM0.17m | 10:33PM1.05m | 10:55AM0.05m | 11:18PM0.92m | 11:39AM-0.00m | 11:58PM0.78m | 12:20PM0.01m | 00:35AM0.66m | 12:56PM0.09m | 1:12AM0.56m | 1:30PM0.22m | 1:48AM0.49m | ||||||||
 | |  |  | |  |  | | |  |  | | |  |  | | | | | | | |
 | 5:18 | — | — | 5:20 | — | — | 5:20 | — | — | 5:20 | — | — | 5:22 | — | — | 5:22 | — | — | 5:22 | — | — |
 | — | 6:55 | — | — | 6:54 | — | — | 6:53 | — | — | 6:52 | — | — | 6:52 | — | — | 6:51 | — | — | 6:49 | — |
mm | 1 | 2 | — | 1 | 1 | — | — | — | — | — | — | — | 2 | 5 | 6 | 2 | 1 | — | — | — | 1 |
Temp °C | 29 | 29 | 26 | 29 | 29 | 26 | 30 | 30 | 24 | 27 | 26 | 24 | 26 | 23 | 24 | 28 | 28 | 25 | 29 | 29 | 25 |
Feels °C | 32 | 33 | 30 | 33 | 34 | 29 | 30 | 30 | 24 | 29 | 28 | 26 | 30 | 26 | 28 | 31 | 30 | 29 | 31 | 31 | 28 |
Swell 1 Height (m) Direction Period (s) | SSW 12 | SSW 12 | S 11 | S 10 | S 10 | S 10 | S 10 | S 10 | S 10 | SSW 10 | SSW 11 | SSW 10 | SSW 9 | SSW 9 | ESE 5 | S 9 | S 9 | S 9 | S 8 | S 9 | S 9 |
| kJ | 384 | 378 | 289 | 242 | 190 | 260 | 212 | 212 | 221 | 177 | 161 | 131 | 90 | 86 | 24 | 57 | 57 | 54 | 51 | 59 | 79 |
Swell 2 Height (m) Direction Period (s) | ESE 13 | E 13 | ESE 13 | E 12 | E 12 | E 12 | E 11 | E 11 | E 10 | E 10 | S 10 | ESE 5 | ESE 5 | SE 12 | SSW 9 | E 9 | ESE 4 | E 10 | E 10 | SE 10 | SE 10 |
| kJ | 372 | 339 | 286 | 193 | 144 | 101 | 62 | 37 | 33 | 18 | 18 | 9 | 8 | 22 | 84 | 14 | 6 | 32 | 33 | 35 | 34 |
Swell 3 Height (m) Direction Period (s) | SSE 7 | S 11 | SSW 11 | SSW 11 | SSW 11 | SE 14 | SE 13 | SE 13 | SE 13 | SE 13 | E 10 | SE 12 | SE 12 | E 9 | SE 12 | SE 11 | E 12 | SE 11 | SE 11 | E 10 | E 11 |
| kJ | 96 | 181 | 219 | 78 | 76 | 31 | 27 | 27 | 27 | 27 | 8 | 24 | 23 | 7 | 22 | 20 | 24 | 19 | 29 | 34 | 35 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | NNE 3 | NNE 4 | NE 5 | NE 4 | NE 5 | — | NE 3 | E 5 | E 5 | E 5 | — | ESE 4 | SE 4 | — | — | — | — |
| kJ | — | — | — | — | 3 | 6 | 11 | 20 | 14 | — | 2 | 27 | 22 | 11 | — | 7 | 6 | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 11 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 19 | 11 | 14 | 0 | 0 | 14 | 385 | 0 | 19 | 19 | 0 |
Best forecast wave conditions in Shikoku | |||||||||||||||||||||
Best forecast wave conditions in Japan | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
Latest Updates
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.
Nearest