Surf Forecasts:
Asakawa surf forecast from 22 Aug 2026:
- Best quality surf: Monday 24 Aug, 9PM (local time) - 7.5ft (2.3m), 16s period, SE swell with glassy winds.
- Most powerful swell: Tuesday 25 Aug, 3PM (local time) - 11ft (3.5m), 15s period, SSE swell with 6,366 kJ wave energy.
- Next surfable swell (1★+): Sunday 23 Aug, 6AM (local time) - 2ft (0.6m), 8s period with SSW 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 23) at 6AM. The primary swell is predicted to be 0.6m and 8s period with a secondary swell of 0.3m and 10s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Asakawa in the next 16 days are 3.5m 15s and forecast to arrive on Tuesday (Aug 25) at 3PM. Winds are predicted to be onshore at the time the swell arrives.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6AM (Sun 23rd Aug) | 2ft (0.6m) 8s |
| Best Surf | 9PM (Mon 24th Aug) | 7.5ft (2.3m) 16s |
| Most Powerful | 3PM (Tue 25th Aug) | 11ft (3.5m) 15s |
Table - best surf conditions forecast for Asakawa over the next 16 days.
The Lowdown
Alright surfers, Rusty here with a look at Asakawa for the next couple of weeks. It's a bit of a mixed bag to be honest, starting slow before we get a pulse of quality later.
First up, we’re kicking off this Sunday morning with just ankle-biters. Swell is a weak 2ft from the SSW with a short period. There’s only a weak energy of 95, so don't get your hopes up. Winds are glassy though, so if you're desperate for a paddle, you'll find clean little waves.
The first real standout comes on Monday morning, the 24th. This is the best on offer in the whole outlook. We’ve got a clean 4ft swell from the SE, but the period is a very long 16 seconds, giving us a solid wall of energy (817). With glassy conditions, Asakawa is going to be absolutely pristine. That long period means the waves will have proper shape and push. Asakawa is a point break, so it'll handle that long-period groundswell perfectly. Keep in mind, it's a point, so it can get a bit snobby, but with only "sometimes" crowds, you might have it to yourself.
Things get a bit tricky from Monday afternoon onwards. The swell builds through Tuesday, hitting 11ft from the SSE. That’s big, borderline expert-only territory. The wind also swings onshore or cross-onshore, making things lumpy and messy despite the massive energy (up to 6382). The setup likely gets too rough for a good paddle.
The week from the 26th stays similar: decent swell size, but constantly plagued by onshore or cross-onshore wind and a lot of stormy energy. There are a few glassy windows, like Saturday the 29th morning with a smaller 6ft swell from the ESE, but the period drops right off to 7 seconds. It'll be small and weak (477 energy), so it's a far cry from that Monday session.
We get a nice change on Tuesday, the 1st of September. The wind finally turns cross-offshore, and we get clean, waist-high waves. The swell is only 3ft from the ESE, but with a 13-second period, it packs a punch (597). It'll be clean and fun, but don’t expect anything huge.
The following week lacks any clear standouts. Wednesday the 2nd and Thursday the 3rd see the swell pick up again but the wind gets strong and cross-off. It gets very choppy and messy. By the second weekend, heavy rain and strong onshore winds (19 mph) ruin what could have been a good swell. It looks more like a kiter's playground than a surfer's paradise through that period.
So, to sum it up: mark your calendar for Monday morning, the 24th of August. That’s your best chance for a classic session at Asakawa. After that, it's a case of picking the cleanest moments between the wind.
Rusty.
Short Range ForecastLight rain (total 3mm), mostly falling on Sat night. Warm (max 31°C on Sun morning, min 25°C on Mon night). Wind will be generally light. | Days 5-7 Weather SummaryModerate rain (total 10mm), heaviest on Wed afternoon. Warm (max 30°C on Thu morning, min 26°C on Tue night). Wind will be generally light. | ||||||||||||||||||
Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | Friday 28 | ||||||||||||||
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 8 | SSW 8 | SE 13 | SE 12 | SE 16 | SE 16 | SSE 16 | SSE 15 | SSE 15 | SSE 14 | S 13 | S 13 | SSW 12 | SSE 9 | SSE 8 | SSE 9 | S 10 | SSE 10 | SSE 9 |
Wave Graph | |||||||||||||||||||
55 | 54 | 45 | 152 | 793 | 1852 | 5089 | 5799 | 6366 | 4832 | 3389 | 1805 | 995 | 459 | 360 | 721 | 865 | 998 | 601 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | glassy | on | cross | glassy | on | glassy | cross-on | on | glassy | cross-on | on | glassy | on | on | cross | on | cross-on | cross |
High Tide | 00:36AM1.34m | 4:43PM1.42m | 2:31AM1.38m | 5:04PM1.52m | 3:35AM1.49m | 5:25PM1.60m | 4:20AM1.60m | 5:47PM1.67m | 4:59AM1.70m | 6:08PM1.73m | 5:36AM1.78m | 6:30PM1.78m | |||||||
Low Tide | 8:57AM0.58m | 9:51PM1.18m | 9:51AM0.47m | 10:27PM1.07m | 10:31AM0.36m | 10:55PM0.96m | 11:05AM0.27m | 11:22PM0.84m | 11:35AM0.21m | 11:50PM0.72m | 12:05PM0.20m | 00:18AM0.60m | |||||||
— | 5:28 | — | — | 5:30 | — | — | 5:30 | — | — | 5:31 | — | — | 5:31 | — | — | 5:31 | — | — | |
6:40 | — | 6:39 | — | — | 6:38 | — | — | 6:37 | — | — | 6:37 | — | — | 6:35 | — | — | 6:34 | — | |
mm | 2 | — | — | — | — | 1 | — | — | — | 1 | 2 | 3 | — | — | — | 2 | — | 2 | — |
Temp °C | 26 | 31 | 30 | 27 | 31 | 29 | 26 | 30 | 30 | 26 | 29 | 29 | 27 | 30 | 30 | 26 | 30 | 29 | 27 |
Feels °C | 30 | 35 | 34 | 32 | 35 | 33 | 31 | 33 | 33 | 31 | 33 | 33 | 32 | 33 | 33 | 31 | 33 | 32 | 32 |
Swell 1 Height (m) Direction Period (s) | SSW 8 | SSW 8 | S 8 | SE 12 | SE 16 | SE 16 | SSE 16 | SSE 15 | SSE 15 | SSE 14 | S 13 | S 13 | SSW 12 | SSE 9 | SSE 8 | SSE 9 | S 10 | SSE 10 | SSE 9 |
55 | 54 | 30 | 152 | 793 | 1852 | 5089 | 5799 | 6366 | 4832 | 3389 | 1805 | 995 | 459 | 360 | 721 | 865 | 998 | 601 | |
Swell 2 Height (m) Direction Period (s) | ESE 10 | ESE 11 | SE 13 | SSW 9 | SSW 8 | S 8 | E 11 | E 15 | E 14 | E 13 | E 13 | SE 9 | SE 9 | SSW 11 | SSW 9 | E 11 | E 10 | E 14 | SE 12 |
10 | 38 | 45 | 30 | 13 | 12 | 10 | 17 | 16 | 32 | 30 | 311 | 314 | 359 | 110 | 9 | 8 | 4 | 6 | |
Swell 3 Height (m) Direction Period (s) | ESE 13 | ESE 6 | ESE 11 | S 8 | SW 8 | SSW 8 | SW 8 | E 15 | — | — | — | E 13 | E 12 | E 12 | SW 10 | SSW 10 | SE 14 | — | E 12 |
16 | 3 | 23 | 21 | 11 | 6 | 17 | 17 | — | — | — | 29 | 11 | 11 | 50 | 10 | 8 | — | 3 | |
Wind waves Height (m) Direction Period (s) | SW 2 | — | — | — | — | — | — | — | — | — | SE 10 | — | — | — | — | — | — | ESE 6 | E 6 |
1 | — | — | — | — | — | — | — | — | — | 213 | — | — | — | — | — | — | 180 | 207 | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 2 | 0 | 11 | 2 | 0 | 11 | 0 | 433 | 19 | 0 | 19 | 11 | 0 | 11 | 11 | 2 | 11 | 11 | 2 |
Best forecast wave conditions in Shikoku | |||||||||||||||||||
Best forecast wave conditions in Japan | |||||||||||||||||||
Header Global | |||||||||||||||||||
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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.











