
Surf Forecasts:
Asakawa surf forecast from 22 Jul 2026:
- Best quality surf: Friday 24 Jul, 12AM (local time) - 1ft (0.3m), 18s period, SE swell with offshore winds.
- Most powerful swell: Saturday 25 Jul, 3AM (local time) - 1.5ft (0.4m), 16s period, SE swell with 94 kJ wave energy.
- Next surfable swell (1★+): Friday 24 Jul, 12AM (local time) - 1ft (0.3m), 18s 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 Friday (Jul 24) at 12AM. The primary swell is predicted to be 0.3m and 18s period with a secondary swell of 0.3m and 10s. Another secondary swell of 0.2m and 4s is also forecast. Another secondary swell of 0.4m and 4s is also forecast. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Asakawa in the next 16 days are 0.4m 16s and forecast to arrive on Saturday (Jul 25) at 3AM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 3s period and expected on Saturday (Jul 25) at 6AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12AM (Fri 24th Jul) | 1ft (0.3m) 18s |
| Best Surf | 12AM (Fri 24th Jul) | 1ft (0.3m) 18s |
| Most Powerful | 3AM (Sat 25th Jul) | 1.5ft (0.4m) 16s |
Table - best surf conditions forecast for Asakawa over the next 16 days.
The Lowdown
Alright, Rusty here, let’s have a look at what Asakawa’s got cookin’ over the next couple of weeks.
Honestly, it’s a slow start. We’re lookin’ at a real flat spell right through the end of July and into the first day of August. There’s tiny little bumps, but nothin’ you’d paddle out for. It’s not until Sunday the 2nd of August that we finally see a pulse of proper energy roll in.
That Sunday morning, the 2nd, things start to wake up. The swell builds to around 2ft from the ESE, with a solid 15-second period – that’s proper groundswell. Combined energy is up to 278 (moderate wave energy) and the wind is a light cross-offshore, so the line-up should be clean. This is a point break, so that long period will wrap in nicely. Keep in mind it’s an inconsistent setup here at Asakawa (point), so don’t expect a non-stop conveyor belt, but it’s the start of something.
The standout by a long shot is Monday the 3rd of August. The morning session is lookin’ prime: 5ft of ESE swell, 18-second period – that’s very long period groundswell. Combined energy jumps right up to 1276 (strong wave energy). Wind is light and cross-offshore, so the face should be smooth. Now, this size is fine for intermediate surfers but might be a handful for beginners, and with that long period at a point break, the waves will have some serious push and shape. The afternoon gets a bit tricky with onshore wind and the swell pushin’ 5ft, but the morning is the real window.
Then Tuesday the 4th of August, especially the morning, looks excellent for experienced surfers. We’ve got 5ft of easterly swell, 17-second period, and glassy conditions with zero wind. Combined energy is 1386 (strong wave energy). That’s a clean, powerful swell, but at 5ft it’s at that edge where beginners might find it a bit much, and the long period will make the sets come through with some authority.
After that, it fades quickly. Wednesday the 5th drops off into marginal, and from Thursday the 6th onwards we’re back to flat, weak conditions with poor surf through to the end of the forecast period on the 7th.
So, if you’re lookin’ for the best, set your alarm for Monday the 3rd of August, morning session at Asakawa. Clean conditions, solid swell from the ESE, and that long period will give you some proper lines. Tuesday morning is a very close second.
Rusty.
Short Range ForecastLight rain (total 8mm), mostly falling on Sat afternoon. Warm (max 33°C on Sat morning, min 27°C on Thu night). Wind will be generally light. | Days 4-6 Weather SummaryHeavy rain (total 27mm), heaviest during Mon afternoon. Warm (max 31°C on Sun morning, min 25°C on Tue night). Wind will be generally light. | ||||||||||||||||||||
Thursday 23 | Friday 24 | Saturday 25 | Sunday 26 | Monday 27 | Tuesday 28 | Wednesday 29 | |||||||||||||||
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) | SE 10 | SE 10 | SE 18 | SE 18 | SE 18 | SE 16 | SE 16 | SE 16 | SE 16 | SE 15 | SE 15 | SE 14 | SE 14 | SE 14 | SE 14 | ESE 10 | SE 10 | SE 10 | SE 10 | SE 10 | SE 10 |
Wave Graph | |||||||||||||||||||||
25 | 25 | 50 | 49 | 49 | 42 | 91 | 90 | 87 | 78 | 76 | 74 | 72 | 70 | 65 | 68 | 49 | 48 | 48 | 48 | 47 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | cross-on | off | glassy | cross-on | off | glassy | glassy | cross-off | glassy | glassy | cross-off | glassy | on | off | glassy | glassy | off | glassy | on | cross-off |
High Tide | 2:11PM1.24m | 00:16AM1.45m | 3:54PM1.32m | 1:31AM1.43m | 4:48PM1.42m | 2:45AM1.46m | 5:23PM1.50m | 3:43AM1.52m | 5:52PM1.58m | 4:30AM1.60m | 6:20PM1.64m | 5:10AM1.68m | 6:46PM1.68m | ||||||||
Low Tide | 6:12PM1.14m | 8:11AM0.59m | 8:12PM1.20m | 9:17AM0.51m | 9:41PM1.17m | 10:08AM0.41m | 10:33PM1.11m | 10:50AM0.32m | 11:10PM1.04m | 11:27AM0.23m | 11:43PM0.96m | 12:00PM0.17m | 00:13AM0.89m | ||||||||
5:07 | — | — | 5:07 | — | — | 5:09 | — | — | 5:09 | — | — | 5:09 | — | — | 5:11 | — | — | 5:11 | — | — | |
— | 7:08 | — | — | 7:08 | — | — | 7:07 | — | — | 7:07 | — | — | 7:07 | — | — | 7:06 | — | — | 7:05 | — | |
mm | — | 1 | 1 | 1 | 2 | — | — | 3 | — | 1 | 3 | 3 | 2 | 6 | 1 | 2 | 7 | 2 | — | — | — |
Temp °C | 32 | 32 | 29 | 32 | 32 | 29 | 33 | 32 | 29 | 31 | 30 | 27 | 30 | 30 | 27 | 29 | 28 | 26 | 30 | 30 | 27 |
Feels °C | 37 | 37 | 34 | 37 | 37 | 34 | 37 | 37 | 34 | 36 | 36 | 32 | 34 | 35 | 32 | 33 | 34 | 31 | 34 | 34 | 31 |
Swell 1 Height (m) Direction Period (s) | SE 10 | SE 10 | SE 10 | SE 10 | SE 18 | SE 11 | SE 11 | SE 10 | SE 10 | SE 10 | SE 11 | S 8 | S 8 | S 8 | S 9 | ESE 10 | SE 10 | S 8 | SE 10 | SE 10 | SE 10 |
25 | 25 | 16 | 23 | 49 | 41 | 40 | 35 | 48 | 50 | 55 | 50 | 47 | 52 | 55 | 68 | 49 | 35 | 48 | 48 | 47 | |
Swell 2 Height (m) Direction Period (s) | SSW 4 | SE 19 | SSW 4 | SE 18 | SE 9 | SE 16 | SE 16 | SE 16 | SE 16 | SE 15 | S 9 | SE 11 | SE 10 | SE 10 | SE 10 | S 8 | S 8 | SE 10 | SSW 8 | SSW 8 | SSW 8 |
1 | 15 | 1 | 49 | 14 | 42 | 91 | 90 | 87 | 78 | 39 | 40 | 51 | 50 | 50 | 35 | 36 | 48 | 22 | 22 | 21 | |
Swell 3 Height (m) Direction Period (s) | SE 20 | S 8 | SE 18 | SSW 4 | ESE 11 | SSW 4 | S 8 | S 8 | SSW 8 | S 9 | SE 15 | SE 14 | SE 14 | SE 14 | SE 14 | SE 13 | SE 13 | SE 13 | SE 13 | SE 13 | SE 12 |
15 | 5 | 50 | 2 | 13 | 2 | 5 | 5 | 11 | 26 | 76 | 74 | 72 | 70 | 65 | 28 | 28 | 27 | 27 | 26 | 25 | |
Wind waves Height (m) Direction Period (s) | — | SSW 4 | SW 4 | N 3 | — | — | — | NNE 3 | WSW 3 | W 4 | — | — | NNE 2 | NNE 3 | — | NE 3 | NE 3 | — | — | — | — |
— | 1 | 4 | 1 | — | — | — | 2 | 1 | 1 | — | — | 1 | 1 | — | 3 | 2 | — | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 289 | 6 | 433 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 11 | 0 | 0 | 0 |
Best forecast wave conditions in Shikoku | |||||||||||||||||||||
Best forecast wave conditions in Japan | |||||||||||||||||||||
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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.










