
Surf Forecasts:
Asakawa surf forecast from 3 Aug 2026:
- Best quality surf: Tuesday 4 Aug, 9PM (local time) - 13ft (4.0m), 16s period, ESE swell with glassy winds.
- Most powerful swell: Thursday 6 Aug, 3PM (local time) - 18ft (5.5m), 16s period, SE swell with 15,625 kJ wave energy.
- Next surfable swell (1★+): Tuesday 4 Aug, 9PM (local time) - 13ft (4.0m), 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 4.0m 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 5.5m 16s and forecast to arrive on Thursday (Aug 06) at 3PM. 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) | 13ft (4.0m) 16s |
| Best Surf | 9PM (Tue 4th Aug) | 13ft (4.0m) 16s |
| Most Powerful | 3PM (Thu 6th Aug) | 18ft (5.5m) 16s |
Table - best surf conditions forecast for Asakawa over the next 16 days.
The Lowdown
G’day, it’s Rusty here.
We’ve got a solid 16-day stretch ahead, but it ain’t perfect right off the bat. The first couple of days are a bit of a tease, but there’s a proper pulse of energy coming through mid-week that’ll have you checking your board. Let’s break it down.
The action starts Tuesday the 4th. We’ve got a 10ft ESE swell rolling in, but it’s not exactly clean. The wind’s blowing cross-onshore and the energy is strong, with a combined swell energy of 7040. It’s a bit raw, and the tide might be messing with things. The water’s sitting at 85°, which is a touch warmer than usual for this time of year.
Wednesday the 5th is where things start to wake up. The swell bumps up to 15ft in the morning, then pushes to 16ft in the afternoon, all from the ESE. The wind drops to a light breeze, which is a relief. The energy is cranking at 9047 in the morning, building to 11470 by the afternoon. This is looking like the first real standout. Asakawa (Asakawa) is a point break, and with that ESE swell and clean conditions, it’s going to be lined up. The long-period groundswell at 16 seconds is best here, not at the beach. This is the pick of the first few days.
Thursday the 6th, the swell keeps pushing at 18ft, but the wind picks up to a moderate cross-shore. It’s still got a lot of punch, but the surface will get a bit of chop. The energy is huge—12852 in the morning, jumping to 15625 by the afternoon. It’s big, but it’s not going to be as clean as Wednesday. This is definitely expert territory at this size.
Friday the 7th, we’re still looking at 16ft SSE swell, but the wind stays on it. The morning’s a bit cross, but the afternoon turns onshore and chops up, making it poor. The energy is still very strong at 14040, but you’ll be fighting the conditions. The weekend starts to fade.
Saturday the 8th and Sunday the 9th, the swell drops to 12ft and swings to the SSW. The wind is still moderate and cross-shore, which is not ideal. The energy is still moderate, in the 6830-9698 range. It’s surfable, but you’ll be looking for shelter. The afternoons are especially poor as the onshore wind builds.
Monday the 10th, the swell drops further to 10ft, but the wind is now fresh cross-onshore and lumpy. It’s not looking good for paddling out, and the energy is dropping to 5871-7665. I’d give this one a miss.
Tuesday the 11th, things really back off. The swell drops to 5ft in the morning, and the wind is still cross-onshore. It’s messy. The energy is down in the 1842-2412 range, which is weak.
Now, we hit a quiet spell. From Wednesday the 12th through Sunday the 16th, the swell is below 4ft for most of it. There’s a moment on Wednesday afternoon where it goes glassy with a 4ft S swell, but it’s tiny. The energy is down to 747. This is a definite lull. There’s a little bump on Sunday the 16th afternoon with a 5ft ESE swell, but it’s short-period and messy. Not worth getting excited about.
But don’t worry, the long-range forecast is holding a little promise. About a week and a half out, on Monday the 17th of August, we see a new pulse of 10ft ESE swell. The wind is light and there’s a chance of clean conditions in the morning. The energy is moderate at 3381, but it’s still a week away, so take that with a grain of salt. It’s a long way out, but it’s something to keep an eye on.
The following days, Tuesday the 18th and Wednesday the 19th, show a drop back to 5-5ft, but with glassy conditions. It’s small, but it might be clean. That’s about all we can hope for after this next big pulse.
So, the short version: Wednesday the 5th is your standout day, with big, clean ESE swell at Asakawa. Get on it early. After that, it’s a lot of wind and swell, then a long flat spell until a possible mid-month pulse.
Stay stoked.
Rusty.
Short Range ForecastLight rain (total 8mm), mostly falling on Thu afternoon. Warm (max 31°C on Wed afternoon, min 25°C on Tue night). Wind will be generally light. | Days 4-6 Weather SummaryHeavy rain (total 80mm), heaviest during Sat night. Warm (max 29°C on Fri morning, min 26°C on Fri night). Wind will be generally light. | ||||||||||||||||||||
Tuesday 4 | Wednesday 5 | Thursday 6 | Friday 7 | Saturday 8 | Sunday 9 | Monday 10 | |||||||||||||||
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 17 | ESE 16 | ESE 16 | SE 16 | SE 16 | SE 15 | SE 16 | SSE 16 | SSE 16 | SSE 15 | S 15 | SSW 16 | SSW 16 | SSW 16 | SSW 17 | SSW 16 | SSW 16 | SSW 16 | SSW 15 | SSW 14 |
Wave Graph | |||||||||||||||||||||
4604 | 6015 | 8000 | 9047 | 11470 | 12859 | 12852 | 15625 | 13346 | 13001 | 10326 | 6481 | 6151 | 5363 | 5959 | 7359 | 5954 | 5933 | 4981 | 3692 | 3033 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | on | glassy | cross | cross-on | cross-off | cross | cross | cross-off | cross | cross-on | cross-off | cross | cross-on | cross-on | cross | cross-on | cross | cross-on | cross-on | cross-on |
High Tide | 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 | 5:14PM1.67m | ||||||||
Low Tide | 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 | 10:02AM0.17m | 10:33PM1.05m | ||||||||
5:16 | — | — | 5:16 | — | — | 5:16 | — | — | 5:18 | — | — | 5:18 | — | — | 5:18 | — | — | 5:20 | — | — | |
— | 7:00 | — | — | 6:59 | — | — | 6:59 | — | — | 6:58 | — | — | 6:57 | — | — | 6:55 | — | — | 6:54 | — | |
mm | — | 1 | — | — | — | — | — | 3 | 4 | 5 | 3 | 4 | 6 | 9 | 22 | 12 | 14 | 5 | 2 | 3 | 13 |
Temp °C | 29 | 29 | 26 | 30 | 31 | 27 | 30 | 30 | 27 | 29 | 29 | 27 | 28 | 27 | 26 | 26 | 26 | 26 | 26 | 26 | 26 |
Feels °C | 32 | 32 | 30 | 32 | 33 | 30 | 31 | 32 | 30 | 31 | 30 | 30 | 31 | 29 | 29 | 27 | 27 | 28 | 26 | 26 | 27 |
Swell 1 Height (m) Direction Period (s) | ESE 16 | ESE 17 | ESE 16 | ESE 16 | SE 16 | SE 16 | SE 15 | SE 16 | SSE 16 | SSE 16 | SSE 15 | S 15 | SSW 16 | SSW 16 | SSW 16 | SSW 17 | SSW 16 | SSW 16 | SSW 16 | SSW 15 | SSW 14 |
4604 | 6015 | 8000 | 9047 | 11470 | 12859 | 12852 | 15625 | 13346 | 13001 | 10326 | 6481 | 6151 | 5363 | 5959 | 7359 | 5954 | 5933 | 4981 | 3692 | 3033 | |
Swell 2 Height (m) Direction Period (s) | ESE 19 | — | — | — | — | — | — | — | — | — | — | ESE 10 | ESE 9 | — | — | — | — | — | — | — | E 12 |
1802 | — | — | — | — | — | — | — | — | — | — | 1050 | 1129 | — | — | — | — | — | — | — | 49 | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | E 8 | E 9 | — | — | — | — | — | — | — | E 9 | ESE 9 | — | — | SE 9 | ESE 9 | ESE 10 | ESE 10 | ESE 9 | ESE 9 | ESE 9 | ESE 8 |
634 | 846 | — | — | — | — | — | — | — | 1039 | 2091 | — | — | 1467 | 1672 | 2339 | 2555 | 2120 | 2684 | 2179 | 1125 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 19 | 19 | 0 | 43 | 245 | 0 | 22 | 459 | 0 | 459 | 459 | 0 | 459 | 459 | 459 | 475 | 459 | 510 | 1037 | 459 | 1037 |
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.











