Surf Forecasts:
Asakawa surf forecast from 29 Jul 2026:
- Best quality surf: Wednesday 5 Aug, 12PM (local time) - 20ft (6.0m), 18s period, SE swell with cross-shore winds.
- Most powerful swell: Thursday 6 Aug, 3AM (local time) - 25ft (7.5m), 18s period, SE swell with 33,663 kJ wave energy.
- Next surfable swell (1★+): Saturday 1 Aug, 9PM (local time) - 1.5ft (0.4m), 11s 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 Saturday (Aug 01) at 9PM. The primary swell is predicted to be 0.2m and 18s period with a secondary swell of 0.4m and 11s. Another secondary swell of 0.2m and 4s is also forecast. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Asakawa in the next 16 days are 7.5m 18s and forecast to arrive on Thursday (Aug 06) at 3AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 3s period and expected on Sunday (Aug 02) at 9AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9PM (Sat 1st Aug) | 1.5ft (0.4m) 11s |
| Best Surf | 12PM (Wed 5th Aug) | 20ft (6.0m) 18s |
| Most Powerful | 3AM (Thu 6th Aug) | 25ft (7.5m) 18s |
Table - best surf conditions forecast for Asakawa over the next 16 days.
The Lowdown
Alright, Rusty here again, giving you the lowdown on Asakawa. We’ve got a slow start, but a big wall of water is on the way.
First few days, from the end of July through August 1st, are a total dud. Tiny swell, hardly any energy, and the reports are all “poor surf conditions.” Don’t even bother.
Things finally wake up on Sunday, August 2nd. A longer-period groundswell arrives from the east-southeast. By the afternoon, we’re talking 4ft waves at 16 seconds, with the combined energy hitting 571 (moderate). The wind is glassy, which is a huge plus. The water temp is about normal for the season. This is your first real chance to get wet, even if it’s not huge.
Now, the one you have to circle on your calendar is Wednesday, August 5th through Friday the 7th. A massive southeast swell is forecast. Wave heights explode to 21ft on Wednesday, and 24ft on Thursday, with a very long 18-second period. The energy readings are insane, hitting 24,928 and then 38,598 (very strong). This is a serious, expert-only situation. Anything over 8ft is for the experienced crew only. The wind stays cross-shore, not glassy, but manageable for those who can handle a big wave at a point break.
After that big pulse passes, it drops off quickly. Saturday the 8th still has 8ft from the south, but it comes with thunderstorms and onshore wind. From Sunday the 9th onward, it’s back to small, messy stuff under 6ft, with plenty of onshore breezes. Thursday the 14th offers a little clean-up with 3ft and a clean offshore wind, but it’s small.
Bottom line: If you’re an expert looking for the biggest, most powerful swell of the window, it’s Wednesday, August 5th. For a clean, fun session that everyone else can handle, aim for Sunday afternoon, August 2nd.
Respect the ocean.
- Rusty
Short Range ForecastSome drizzle, heaviest during Thu afternoon. Warm (max 33°C on Thu morning, min 27°C on Thu night). Wind will be generally light. | Days 5-7 Weather SummaryLight rain (total 3mm), mostly falling on Tue morning. Warm (max 33°C on Sun morning, min 27°C on Sat night). Wind will be generally light. | ||||||||||||||||||
Thursday 30 | Friday 31 | Saturday 1 | Sunday 2 | Monday 3 | Tuesday 4 | ||||||||||||||
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) | SE 10 | SE 10 | SE 10 | SE 9 | SE 9 | SE 9 | SE 10 | SE 10 | SE 11 | ESE 16 | ESE 15 | ESE 16 | ESE 16 | ESE 16 | ESE 18 | ESE 18 | ESE 17 | ESE 18 | ESE 18 |
Wave Graph  | |||||||||||||||||||
 kJ | 47 | 23 | 23 | 23 | 24 | 23 | 23 | 38 | 29 | 100 | 201 | 554 | 838 | 1360 | 2552 | 4059 | 4868 | 7021 | 13067 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | glassy | on | glassy | glassy | glassy | cross-off | glassy | cross-on | off | glassy | glassy | cross-off | cross | on | glassy | cross-on | cross-on | glassy |
High Tide | 5:48AM1.74m | 7:11PM1.71m | 6:24AM1.77m | 7:36PM1.73m | 7:00AM1.77m | 8:00PM1.74m | 7:37AM1.73m | 8:25PM1.74m | 8:17AM1.67m | 8:51PM1.72m | 9:03AM1.58m | 9:19PM1.69m | |||||||
Low Tide | 00:13AM0.89m | 12:32PM0.15m | 00:44AM0.81m | 1:02PM0.16m | 1:15AM0.74m | 1:31PM0.21m | 1:47AM0.67m | 2:00PM0.31m | 2:22AM0.61m | 2:31PM0.44m | 3:01AM0.57m | 3:03PM0.60m | |||||||
 |  |  |  |  | | | | | | | | | | | | | | | |
 | — | 5:11 | — | — | 5:13 | — | — | 5:13 | — | — | 5:13 | — | — | 5:15 | — | — | 5:16 | — | — |
 | 7:05 | — | 7:04 | — | — | 7:04 | — | — | 7:02 | — | — | 7:01 | — | — | 7:00 | — | — | 7:00 | — |
mm | — | — | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 2 | — |
Temp °C | 29 | 33 | 33 | 29 | 33 | 32 | 29 | 33 | 33 | 29 | 33 | 33 | 30 | 32 | 31 | 27 | 30 | 30 | 27 |
Feels °C | 33 | 37 | 37 | 34 | 36 | 36 | 34 | 36 | 36 | 33 | 35 | 37 | 34 | 36 | 34 | 33 | 34 | 34 | 33 |
Swell 1 Height (m) Direction Period (s) | SSW 8 | SE 10 | SE 10 | SE 9 | SE 9 | SE 9 | SE 10 | SE 10 | SE 11 | SE 11 | ESE 15 | ESE 16 | ESE 16 | ESE 16 | ESE 18 | ESE 18 | ESE 17 | ESE 18 | ESE 18 |
| kJ | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 38 | 29 | 41 | 201 | 554 | 838 | 1360 | 2552 | 4059 | 4868 | 7021 | 13067 |
Swell 2 Height (m) Direction Period (s) | SE 10 | SSW 5 | SSW 8 | SSW 7 | SSW 5 | ENE 3 | SE 11 | SSW 4 | ESE 17 | ESE 16 | ESE 9 | SE 10 | SE 9 | S 8 | SSE 9 | — | SE 6 | ESE 7 | — |
| kJ | 47 | 5 | 6 | 11 | 4 | 1 | 20 | 2 | 28 | 100 | 32 | 16 | 14 | 5 | 17 | — | 33 | 131 | — |
Swell 3 Height (m) Direction Period (s) | SE 12 | SSW 8 | SSW 4 | SE 12 | SE 12 | SSW 4 | S 7 | S 7 | S 4 | S 7 | SE 11 | S 8 | S 8 | SSW 8 | — | — | — | — | — |
| kJ | 25 | 6 | 2 | 6 | 24 | 2 | 4 | 1 | 1 | 1 | 5 | 1 | 5 | 6 | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | NNE 3 | — | — | NE 3 | W 6 | N 3 | — | — | — | ESE 5 | — | — | ESE 7 | — |
| kJ | — | — | — | — | — | 2 | — | — | 1 | 1 | 5 | — | — | — | 28 | — | — | 285 | — |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 0 | 30 | 30 | 6 | 2 | 459 | 6 | 6 | 22 | 0 | 0 | 0 | 0 | 22 | 459 | 0 | 41 | 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)
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