
Surf Forecasts:
Asakawa surf forecast from 24 Jul 2026:
- Best quality surf: Saturday 25 Jul, 9AM (local time) - 1.5ft (0.4m), 16s period, SE swell with glassy winds.
- Most powerful swell: Saturday 25 Jul, 9AM (local time) - 1.5ft (0.4m), 16s period, SE swell with 91 kJ wave energy.
- Next surfable swell (1★+): Saturday 25 Jul, 9AM (local time) - 1.5ft (0.4m), 16s 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 (Jul 25) at 9AM. The primary swell is predicted to be 0.4m and 16s period with a secondary swell of 0.5m and 11s. Another secondary swell of 0.1m and 9s is also forecast. The wind is predicted to be glassy 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 9AM. Winds are predicted to be glassy at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 3s period and expected on Sunday (Jul 26) at 3AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9AM (Sat 25th Jul) | 1.5ft (0.4m) 16s |
| Best Surf | 9AM (Sat 25th Jul) | 1.5ft (0.4m) 16s |
| Most Powerful | 9AM (Sat 25th Jul) | 1.5ft (0.4m) 16s |
Table - best surf conditions forecast for Asakawa over the next 16 days.
The Lowdown
Righto, Rusty here. Let’s have a look at what’s on offer at Asakawa over the next couple of weeks. I’ll be straight with you—this is a bit of a slow starter, so don’t be in a rush to wax up just yet.
The first week is pretty quiet with tiny, clean waves but very ordinary conditions. The water temp is sitting at 83°, which is a touch warmer than normal for this time of year. We kick off Saturday 25 July with glassy 1ft surf from the SE, period a long 16 seconds, and combined energy at 155—weak. It stays like that through Sunday and Monday, all glassy, but the waves are so small they’re barely worth the paddle. Tuesday 28 July morning sees a slight lift to 2ft from the ESE with a shorter 10-second period, energy at 132, still weak. That afternoon turns onshore and messy. Wednesday 29 July morning offers 2ft with a cross-off breeze, but it’s still weak. From Thursday 30 July through to Saturday 1 August, it drops off into the doldrums—waves under 2ft, poor conditions, energy below 54, and mostly onshore or cross-onshore winds. A real lull.
Then we get a flicker of hope. On Sunday 2 August morning, a clean 2ft ESE swell rolls in with a 14-second period and energy up to 232—still weak but showing signs of life. That afternoon gets a bit crinkled by cross-onshore breeze, but the trend is building.
Now, here’s the standout. From Tuesday 4 August through to Friday 7 August, this place fires up for the experienced crew. Tuesday morning brings a solid 7ft ESE groundswell, period 16 seconds, with a clean cross-off breeze from the NE. Combined energy hits 2265—strong. That’s proper, powerful, lined-up surf for those who know what they’re doing. The afternoon gets a bit cross-on, but Wednesday 5 August morning holds 7ft at 17 seconds (energy 2634), though the wind turns cross-shore, so it’s not quite as clean. The absolute cream of the crop is Thursday 6 August: glassy all day with 8ft ESE swell, 17-second period, and energy roaring at 3996–4145—very strong. That’s a big, clean, powerful day for experts only. Friday 7 August keeps the pace with 8ft from the E, a very long 18-second period, and offshore winds from N to NNW. Energy peaks at 4267. That’s the pick of the window: big, clean, offshore. Just remember, long-period E swell tends to be straight at beach breaks—Asakawa is a point, so it should handle that beautifully.
After that pulse, Saturday 8 August morning drops to 3ft from the SW with a clean offshore, then the following days settle back to smaller but clean conditions around 2–3ft. Worth a look if you missed the main event.
No other breaks in the file, so this is it. If you’re a beginner, steer clear of anything over 5ft—that’s from 4 August onward. For the big stuff on 6–7 August, it’s expert territory only.
Rusty.
Short Range ForecastLight rain (total 7mm), mostly falling on Mon afternoon. Warm (max 33°C on Sat morning, min 27°C on Sun night). Wind will be generally light. | Days 4-6 Weather SummarySome drizzle, heaviest during Tue afternoon. Warm (max 33°C on Wed afternoon, min 26°C on Wed night). Wind will be generally light. | ||||||||||||||||||||
Saturday 25 | Sunday 26 | Monday 27 | Tuesday 28 | Wednesday 29 | Thursday 30 | Friday 31 | |||||||||||||||
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 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 | ESE 10 | ESE 10 | ESE 9 | SE 9 | SE 9 | SE 9 | SE 9 |
Wave Graph | |||||||||||||||||||||
91 | 90 | 87 | 78 | 76 | 74 | 72 | 70 | 65 | 67 | 49 | 48 | 48 | 48 | 38 | 35 | 35 | 23 | 24 | 24 | 23 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | glassy | off | glassy | glassy | cross-off | glassy | glassy | cross-off | glassy | on | off | cross-off | glassy | cross-off | cross-on | on | cross | glassy | cross-on | cross-off |
High Tide | 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 | 5:48AM1.74m | 7:11PM1.71m | 6:24AM1.77m | 7:36PM1.73m | ||||||||
Low Tide | 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 | 12:32PM0.15m | 00:44AM0.81m | 1:02PM0.16m | 1:15AM0.74m | |||||||
5:09 | — | — | 5:09 | — | — | 5:09 | — | — | 5:11 | — | — | 5:11 | — | — | 5:11 | — | — | 5:13 | — | — | |
— | 7:07 | — | — | 7:07 | — | — | 7:07 | — | — | 7:06 | — | — | 7:05 | — | — | 7:04 | — | — | 7:04 | — | |
mm | — | — | — | — | 1 | — | — | 6 | — | — | 1 | — | — | — | — | — | — | — | — | — | — |
Temp °C | 33 | 33 | 29 | 32 | 31 | 28 | 32 | 30 | 28 | 32 | 31 | 29 | 32 | 33 | 28 | 31 | 31 | 27 | 32 | 32 | 28 |
Feels °C | 37 | 38 | 34 | 36 | 36 | 32 | 36 | 35 | 33 | 36 | 35 | 34 | 35 | 37 | 32 | 34 | 35 | 32 | 36 | 36 | 32 |
Swell 1 Height (m) Direction Period (s) | SE 11 | SE 10 | SE 10 | SE 10 | SE 11 | S 8 | S 8 | S 9 | S 8 | ESE 10 | SE 10 | SE 10 | SE 10 | S 8 | ESE 10 | ESE 10 | ESE 9 | SE 9 | SE 9 | SE 9 | SE 9 |
56 | 36 | 48 | 50 | 55 | 50 | 50 | 54 | 51 | 67 | 49 | 48 | 48 | 33 | 38 | 35 | 35 | 23 | 23 | 21 | 23 | |
Swell 2 Height (m) Direction Period (s) | SE 16 | SE 16 | SE 16 | S 9 | S 9 | SE 14 | SE 10 | SE 10 | SE 10 | S 8 | S 8 | S 8 | SSW 8 | SE 10 | SSW 8 | SSW 8 | SSW 8 | SSW 7 | SSW 7 | SE 12 | SE 11 |
91 | 90 | 87 | 26 | 39 | 74 | 51 | 50 | 50 | 36 | 35 | 34 | 22 | 48 | 20 | 11 | 11 | 11 | 5 | 24 | 20 | |
Swell 3 Height (m) Direction Period (s) | S 8 | S 8 | S 8 | SE 15 | SE 15 | SE 11 | SE 14 | SE 14 | SE 14 | SE 14 | SE 13 | SE 13 | SSW 5 | SE 13 | SE 12 | SE 14 | SE 12 | SE 12 | SE 12 | S 7 | SSW 7 |
5 | 5 | 10 | 78 | 76 | 40 | 72 | 70 | 65 | 29 | 28 | 27 | 5 | 26 | 25 | 8 | 6 | 6 | 24 | 4 | 5 | |
Wind waves Height (m) Direction Period (s) | NE 9 | NNE 3 | — | NNE 3 | — | WSW 3 | — | — | — | — | SSW 4 | — | — | NE 3 | — | — | — | SW 3 | — | — | WSW 2 |
3 | 2 | — | 3 | — | 1 | — | — | — | — | 1 | — | — | 2 | — | — | — | 1 | — | — | 1 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 11 | 0 | 0 | 0 | 0 | 22 | 581 | 14 | 2 | 30 | 6 |
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.










