
Surf Forecasts:
Asakawa surf forecast from 23 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 0.5m 3s period and expected on Wednesday (Jul 29) at 3PM.
| 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
G’day, Rusty here. Look, I’ll be straight with you – for the next week or so, it’s a proper flat spell. We’re looking at a gap of about nine days where there’s really nothing to get excited about. From Thursday the 23rd of July right through to Saturday the 1st of August, the swell is tiny, mostly around 1.0ft to 1ft, and the energy is weak (41 to 173). The guides call it poor or ordinary, and I’m not gonna argue. It’s a frustrating stretch, but these things happen. The water temp is sitting at 83°F, which is a touch warmer than normal for this time of year, so at least it’s comfortable for a float.
The real story, and the one standout in this whole sixteen-day window, is Asakawa on Monday the 3rd of August. We finally get a pulse of proper swell. The morning session is where it’s at. Swell bumps up to 7ft from the ESE, with a long period of 18 seconds – that’s classic groundswell energy. The combined energy is a massive 2927 (strong), and with glassy conditions and near-calm wind, it’s going to be clean. That’s a big swell, over 5ft, so it’s for the confident intermediate and above. It’s a point break, which is a good thing for a long-period swell like this, as it’ll line up nicely. The crowd situation is “sometimes”, so you might have a few others, but for a setup this good, it’s worth it.
Tuesday the 4th of August sees the swell peak even bigger, hitting 12ft from the ESE with a very long 19-second period. The energy is off the charts (8565 in the morning, 9427 in the afternoon). But – and this is a big but – the wind turns cross-onshore, and the afternoon kicks up a gentle breeze making it choppy. The morning is glassy, but 12ft is expert territory only. It’s a heavy, powerful wave.
Wednesday the 5th of August holds that 12ft ESE swell, period dropping to 17 seconds. Morning again looks the pick with glassy conditions and excellent surf for the experienced crew. The energy is still very strong (6381).
Thursday the 6th of August is a bit more manageable. The swell drops to 8ft from the E, period 16 seconds, and the morning is glassy with a 3438 energy reading. Excellent surf for experienced surfers. The afternoon holds at 8ft, still glassy, with 2522 energy. This is a solid day.
By Friday the 7th of August, the swell drops to 5ft from the E, period 14 seconds. The morning is clean with a slight offshore breeze, and energy is a moderate 1028. This is now a fun, manageable size for a wider range of surfers.
So, the call is clear. The first week is a write-off. The second week, starting Monday the 3rd of August, is where the magic happens. The absolute standout is Monday morning at Asakawa – that’s the one to mark on the calendar. It’s promising, but it’s over a week away, so keep an eye on it. Tuesday and Wednesday are for the brave. Thursday and Friday are your best chance for a big, clean wave that’s a bit less intimidating.
Rusty.
Short Range ForecastModerate rain (total 10mm), heaviest on Sat afternoon. Warm (max 32°C on Thu morning, min 27°C on Thu night). Wind will be generally light. | Days 4-6 Weather SummaryHeavy rain (total 23mm), heaviest during Tue afternoon. Warm (max 31°C on Sun morning, min 24°C on Mon 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 | SE 10 | SE 10 | SE 10 | SE 10 | ESE 10 | ESE 10 |
Wave Graph | |||||||||||||||||||||
25 | 25 | 50 | 49 | 49 | 42 | 91 | 90 | 87 | 78 | 76 | 74 | 72 | 70 | 65 | 50 | 51 | 48 | 48 | 38 | 38 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | on | off | glassy | cross-on | off | glassy | glassy | cross-off | glassy | glassy | cross-off | glassy | glassy | off | glassy | cross | off | cross-off | glassy | 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 | 1 | — | 4 | — | 1 | 3 | 2 | — | 3 | 4 | 3 | 4 | 3 | — | 4 | 5 |
Temp °C | 32 | 32 | 29 | 32 | 32 | 29 | 32 | 32 | 29 | 31 | 29 | 28 | 30 | 30 | 27 | 30 | 29 | 26 | 29 | 29 | 25 |
Feels °C | 36 | 37 | 34 | 37 | 37 | 34 | 36 | 37 | 34 | 36 | 34 | 33 | 34 | 35 | 31 | 34 | 33 | 30 | 32 | 33 | 29 |
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 8 | S 8 | S 8 | SE 10 | SE 10 | S 8 | ESE 10 |
25 | 25 | 16 | 14 | 49 | 41 | 40 | 35 | 48 | 50 | 55 | 50 | 50 | 51 | 52 | 35 | 51 | 48 | 48 | 33 | 38 | |
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 | SE 10 | SE 10 | SSW 8 | SSW 6 | ESE 10 | SSW 8 |
1 | 15 | 1 | 49 | 14 | 42 | 91 | 90 | 87 | 78 | 39 | 40 | 51 | 50 | 50 | 50 | 49 | 22 | 12 | 38 | 21 | |
Swell 3 Height (m) Direction Period (s) | SE 20 | S 8 | SE 18 | SSW 4 | SSW 4 | SSW 4 | S 8 | S 8 | SSW 8 | S 9 | SE 15 | SE 14 | SE 14 | SE 14 | SE 14 | SE 14 | SE 13 | SSW 5 | SSW 8 | SE 13 | SE 12 |
15 | 5 | 50 | 2 | 2 | 2 | 5 | 5 | 11 | 26 | 76 | 74 | 72 | 70 | 65 | 29 | 28 | 5 | 13 | 26 | 25 | |
Wind waves Height (m) Direction Period (s) | — | SSW 4 | SW 4 | — | — | — | NE 9 | — | WSW 3 | — | — | — | — | NE 3 | — | — | NNE 3 | N 3 | NNE 2 | NNE 3 | NE 4 |
— | 1 | 5 | — | — | — | 3 | — | 1 | — | — | — | — | 2 | — | — | 1 | 1 | 1 | 7 | 2 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 6 | 433 | 0 | 1 | 11 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 14 | 0 | 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.










