
Surf Forecasts:
Asakawa surf forecast from 3 Aug 2026:
- Best quality surf: Wednesday 5 Aug, 6PM (local time) - 20ft (6.0m), 17s period, ESE swell with cross-shore winds.
- Most powerful swell: Thursday 6 Aug, 9PM (local time) - 21ft (6.5m), 17s period, SSE swell with 24,163 kJ wave energy.
- Next surfable swell (1★+): Tuesday 4 Aug, 9PM (local time) - 15ft (4.5m), 16s period with ESE 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 Tuesday (Aug 04) at 9PM. The primary swell is predicted to be 4.5m and 16s period with a secondary swell of 3.5m and 16s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Asakawa in the next 16 days are 6.5m 17s and forecast to arrive on Thursday (Aug 06) at 9PM. Winds are predicted to be cross-shore at the time the swell arrives.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9PM (Tue 4th Aug) | 15ft (4.5m) 16s |
| Best Surf | 6PM (Wed 5th Aug) | 20ft (6.0m) 17s |
| Most Powerful | 9PM (Thu 6th Aug) | 21ft (6.5m) 17s |
Table - best surf conditions forecast for Asakawa over the next 16 days.
The Lowdown
G’day, I’m Rusty, and I’ve been watchin’ the charts for Asakawa like a hawk. We’ve got a proper run of surf comin’ through, but it’s a bit of a slow burner at first. The water’s a touch warmer than normal for this time of year, sittin’ at 84°, which is a nice little bonus for the early paddles.
The joint is inconsistent, so when it fires, you gotta be on it. It’s a point break that’s fairly exposed to swell, and it loves a clean SE angle. The first few days on Monday 3 August and Tuesday 4 August are a bit marginal with cross-on winds making things messy, but the swell is building. By Tuesday afternoon, the energy jumps to 13ft from the ESE with a 17-second period — that’s a proper groundswell with 14569 energy units. Winds are light and onshore, which is a bit of a bummer, but the size has got some punch.
The real standout is Wednesday 5 August. The swell is 15ft to 16ft from the SE, still with that long 17-second period, and the combined energy is massive, hitting 12158 and 15328. Winds are a light cross-shore, which will keep things reasonably clean. This is big, powerful surf — over 8ft, so it’s strictly for experts. The point break setup will handle that long period nicely, with waves jackin’ up and wrappin’ around. This is the best on offer, no doubt.
Thursday 6 August gets even bigger — 20ft to 21ft from the SSE, energy over 20,000. That’s a beast, but cross-shore winds are pickin’ up to a moderate breeze, and the comment says it’s too big for this break. For the brave, it’s a foaming monster, but I’d say it’s more a kite surfers’ paradise than a paddle session. After that, Friday 7 August through to Sunday 10 August sees the swell drop and the wind turn choppy and onshore, with rain and storms. Quality’s poor, and the energy fades from 19185 down to 1507. A gap of a few days with nothin’ worthwhile.
From Monday 11 August to Friday 14 August, the swell dips under 5ft, with periods around 10 to 13 seconds, and energy under 1300. Winds are mostly light or cross-off, so there’s clean little waves on offer, but nothin’ to get excited about — marginal at best.
Then Saturday 16 August shows a flicker of life: a 6ft ESE swell with 11 seconds and cross-off wind, giving 863 energy units and a clean surface. Sunday 17 August is a real standout for the second week. The swell builds to 12ft from the ESE, 13 seconds, and the wind goes glassy in the morning. 4409 energy units, excellent conditions for experienced surfers. That’s a solid, clean wave that’ll hold up well on the point. Monday 18 August is also glassy with 13ft swell from the ESE, 11 seconds, and 3320 energy — excellent for the same crew. Long-range, so it’s promising but not set in stone.
Overall, Wednesday 5 August is the big day for the first week — big, powerful, expert-only. Sunday 17 August is the pick for the second week, with glassy conditions and solid size. Keep an eye on the charts, as the inconsistency means you gotta be ready to pounce.
Rusty
Short Range ForecastLight rain (total 4mm), mostly falling on Mon morning. Warm (max 31°C on Mon morning, min 25°C on Tue night). Wind will be generally light. | Days 4-6 Weather SummaryHeavy rain (total 32mm), heaviest during Sat afternoon. Warm (max 31°C on Thu morning, min 25°C on Sat night). Wind will be generally light. | ||||||||||||||||||||
Monday 3 | Tuesday 4 | Wednesday 5 | Thursday 6 | Friday 7 | Saturday 8 | Sunday 9 | |||||||||||||||
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) | ESE 16 | ESE 16 | ESE 17 | ESE 16 | ESE 17 | ESE 17 | SE 17 | SE 17 | SE 16 | SE 17 | SSE 17 | SSE 17 | SSE 16 | S 15 | S 15 | SSW 15 | SSW 16 | SSW 15 | SSW 15 | SSW 14 | SSW 14 |
Wave Graph | |||||||||||||||||||||
1223 | 1393 | 2437 | 4324 | 8554 | 8569 | 12158 | 15328 | 16477 | 20742 | 22325 | 22995 | 17626 | 8891 | 8338 | 7092 | 5700 | 4971 | 4060 | 2593 | 1126 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | on | cross-on | cross-on | on | glassy | cross | cross | cross-off | cross | cross-on | cross | cross | cross-on | cross-off | cross | cross-on | cross | cross | cross-on | cross-on |
High Tide | 8:51PM1.72m | 9:03AM1.58m | 9:19PM1.69m | 9:59AM1.47m | 9:52PM1.64m | 11:18AM1.36m | 10:35PM1.58m | 1:18PM1.32m | 11:38PM1.53m | 3:21PM1.41m | 1:11AM1.52m | 4:29PM1.55m | 2:42AM1.58m | ||||||||
Low Tide | 2:31PM0.44m | 3:01AM0.57m | 3:03PM0.60m | 3:47AM0.54m | 3:40PM0.78m | 4:44AM0.52m | 4:27PM0.97m | 6:00AM0.50m | 5:43PM1.14m | 7:33AM0.43m | 7:55PM1.22m | 8:57AM0.31m | 9:34PM1.16m | ||||||||
5:15 | — | — | 5:16 | — | — | 5:16 | — | — | 5:16 | — | — | 5:18 | — | — | 5:18 | — | — | 5:18 | — | — | |
— | 7:00 | — | — | 7:00 | — | — | 6:59 | — | — | 6:59 | — | — | 6:58 | — | — | 6:57 | — | — | 6:55 | — | |
mm | 1 | 1 | 2 | — | — | — | — | — | — | — | — | 2 | 2 | 2 | 4 | 8 | 9 | 5 | — | — | — |
Temp °C | 31 | 29 | 27 | 29 | 29 | 26 | 30 | 31 | 27 | 31 | 31 | 28 | 30 | 30 | 27 | 27 | 27 | 26 | 28 | 28 | 25 |
Feels °C | 35 | 33 | 31 | 32 | 32 | 30 | 31 | 33 | 30 | 32 | 31 | 30 | 30 | 30 | 30 | 29 | 29 | 29 | 28 | 28 | 27 |
Swell 1 Height (m) Direction Period (s) | ESE 16 | ESE 16 | ESE 17 | ESE 16 | ESE 17 | ESE 17 | SE 17 | SE 17 | SE 16 | SE 17 | SSE 17 | SSE 17 | SSE 16 | S 15 | S 15 | SSW 15 | SSW 16 | SSW 15 | SSW 15 | SSW 14 | SE 8 |
1223 | 1393 | 2437 | 4324 | 6015 | 8569 | 12158 | 15328 | 16477 | 20742 | 22325 | 22995 | 17626 | 8891 | 8338 | 7092 | 5700 | 4971 | 4060 | 2593 | 456 | |
Swell 2 Height (m) Direction Period (s) | SE 10 | S 8 | SE 12 | ESE 19 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | E 13 | ESE 12 | SSW 14 |
15 | 5 | 6 | 1802 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 123 | 160 | 1126 | |
Swell 3 Height (m) Direction Period (s) | S 8 | S 8 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | S 12 |
5 | 4 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 225 | |
Wind waves Height (m) Direction Period (s) | E 4 | ESE 6 | ESE 7 | E 9 | ESE 17 | — | — | — | — | — | — | — | E 10 | ESE 10 | ESE 10 | ESE 9 | ESE 9 | SE 9 | ESE 9 | ESE 9 | — |
14 | 118 | 200 | 653 | 8554 | — | — | — | — | — | — | — | 1559 | 2804 | 1578 | 1131 | 1251 | 1374 | 1104 | 947 | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 41 | 19 | 19 | 19 | 19 | 0 | 22 | 510 | 0 | 503 | 1720 | 459 | 1803 | 459 | 0 | 459 | 459 | 459 | 2076 | 1720 | 57 |
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
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.











