Surf Forecasts:
Asakawa surf forecast from 20 Jul 2026:
- Best quality surf: Monday 27 Jul, 3AM (local time) - 3ft (0.9m), 11s period, S swell with cross-offshore winds.
- Most powerful swell: Monday 27 Jul, 6PM (local time) - 4ft (1.2m), 11s period, S swell with 338 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 0.3m and 3s is also forecast. Another secondary swell of 0.5m and 4s is also forecast. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Asakawa in the next 16 days are 1.2m 11s and forecast to arrive on Monday (Jul 27) at 6PM. Winds are predicted to be cross-onshore at the time the swell arrives.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12AM (Fri 24th Jul) | 1ft (0.3m) 18s |
| Best Surf | 3AM (Mon 27th Jul) | 3ft (0.9m) 11s |
| Most Powerful | 6PM (Mon 27th Jul) | 4ft (1.2m) 11s |
Table - best surf conditions forecast for Asakawa over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s take a look at what’s coming up for Asakawa. It’s grim for the first week, so don’t bother paddling out just yet. We’ve got a run of tiny, weak surf with poor conditions that won't give you a thing. The combined energy is weak, under 100 (34), and it’s just not worth wetting the suit. That stretch from Monday the 20th right through to the end of the week is a write-off.
There’s a real shift on the weekend of the 25th and 26th. Saturday morning the 25th sees a clean, glassy start with a little 1ft swell from the SE, period around 16 seconds – that’s proper groundswell. The energy picks up a bit (137), and with zero wind, it’s going to be tidy. It’s not a big wave, but it’s the first *real* surf we’ve had. The water temp is sitting at 82°F, which is about normal for this time of year, so no surprises there.
The standout, and I mean the one to circle on the calendar, is the morning of Monday the 28th of July. We’re looking at a solid 5ft swell from the SSW, with a 12-second period, and glassy conditions. The combined energy is strong (747). That’s a proper push of clean, well-shaped energy. This is your best bet by a long shot – it’s big enough to get your heart pumping, but still manageable for an intermediate crew. Just be aware that this spot is inconsistent, so when it fires, it’s a treat. Expect crowds to be possible.
The following morning, Tuesday the 29th, is almost as good – another 5ft SSW swell, glassy, and very good conditions. If you miss the 28th, this is the next window. After that, the swell starts to back off and the wind turns messy again in the afternoons, especially with those risk of thunderstorms kicking in. The very end of the run, around the 31st of July and 1st of August, still has some okay 4ft to 5ft SSW swell, but the period drops and the wind is less reliable. The morning of the 1st of August is worth a mention for a glassy session on 5ft SSW swell.
Overall, the first week is a no-go. The second week has a couple of genuine, glassy, mid-sized days. The 28th of July morning is the clear winner.
Rusty.
Short Range ForecastLight rain (total 7mm), mostly falling on Mon afternoon. Warm (max 31°C on Mon afternoon, min 27°C on Mon night). Wind will be generally light. | Days 5-7 Weather SummaryHeavy rain (total 28mm), heaviest during Fri afternoon. Warm (max 32°C on Sat morning, min 27°C on Thu night). Wind will be generally light. | |||||||||||||||||||
Mon 20 | Tuesday 21 | Wednesday 22 | Thursday 23 | Friday 24 | Saturday 25 | Sunday 26 | ||||||||||||||
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 11 | ESE 11 | SW 8 | ESE 11 | ESE 11 | ESE 11 | ESE 10 | ESE 11 | SE 10 | SE 10 | SE 18 | SE 18 | SE 18 | SE 16 | SE 16 | SE 16 | SE 16 | SE 15 | SE 15 | S 10 |
Wave Graph  | ||||||||||||||||||||
 kJ | 12 | 12 | 11 | 23 | 22 | 22 | 11 | 11 | 25 | 25 | 50 | 49 | 49 | 42 | 91 | 90 | 86 | 78 | 76 | 167 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-off | glassy | cross-on | cross-off | cross | cross-on | cross-off | glassy | cross-on | cross-off | glassy | cross-on | off | glassy | glassy | cross-off | glassy | on | cross |
High Tide | 10:10PM1.62m | 10:46AM1.35m | 10:42PM1.56m | 12:10PM1.25m | 11:21PM1.50m | 2:11PM1.24m | 00:16AM1.45m | 3:54PM1.32m | 1:31AM1.43m | 4:48PM1.42m | 2:45AM1.46m | 5:23PM1.50m | ||||||||
Low Tide | 3:45PM0.65m | 4:40AM0.66m | 4:20PM0.84m | 5:41AM0.66m | 5:01PM1.01m | 6:53AM0.64m | 6:12PM1.14m | 8:11AM0.59m | 8:12PM1.20m | 9:17AM0.51m | 9:41PM1.17m | 10:08AM0.41m | 10:33PM1.11m | |||||||
 |  |  | | |  | |  |  | | | | | | | | | | | | |
 | — | — | 5:05 | — | — | 5:07 | — | — | 5:07 | — | — | 5:07 | — | — | 5:09 | — | — | 5:09 | — | — |
 | 7:10 | — | — | 7:09 | — | — | 7:09 | — | — | 7:08 | — | — | 7:08 | — | — | 7:07 | — | — | 7:07 | — |
mm | 1 | — | — | 2 | — | 1 | 2 | 1 | — | 4 | 2 | 2 | 11 | — | — | 7 | 1 | 1 | 6 | 2 |
Temp °C | 31 | 28 | 30 | 31 | 28 | 30 | 31 | 28 | 31 | 31 | 28 | 31 | 30 | 28 | 32 | 31 | 28 | 30 | 31 | 27 |
Feels °C | 35 | 33 | 36 | 36 | 33 | 35 | 37 | 33 | 35 | 36 | 33 | 36 | 35 | 33 | 37 | 36 | 33 | 35 | 36 | 31 |
Swell 1 Height (m) Direction Period (s) | ESE 7 | ESE 7 | ESE 11 | ESE 11 | ESE 11 | ESE 11 | ESE 10 | ESE 11 | SE 10 | SE 10 | SE 10 | SE 9 | SE 9 | SE 11 | SE 11 | SE 10 | SE 10 | SE 10 | S 10 | S 10 |
| kJ | 10 | 9 | 11 | 23 | 22 | 22 | 11 | 11 | 25 | 25 | 16 | 23 | 14 | 41 | 40 | 49 | 48 | 50 | 72 | 167 |
Swell 2 Height (m) Direction Period (s) | SSE 8 | SSE 8 | SSE 8 | SSE 8 | SSE 8 | SSE 8 | SSE 8 | SSE 8 | SSW 4 | SE 19 | SW 3 | SE 18 | SE 18 | SE 16 | SE 16 | SE 16 | SE 16 | SE 15 | SE 11 | SE 11 |
| kJ | 7 | 7 | 7 | 6 | 6 | 6 | 6 | 6 | 1 | 15 | 2 | 49 | 49 | 42 | 91 | 90 | 86 | 78 | 55 | 55 |
Swell 3 Height (m) Direction Period (s) | ESE 11 | ESE 11 | ESE 6 | ESE 6 | SE 6 | SSW 3 | S 7 | SE 11 | SE 20 | S 8 | SE 18 | SSW 4 | SE 12 | S 7 | SSW 8 | S 8 | S 8 | S 10 | SE 15 | SE 14 |
| kJ | 12 | 12 | 4 | 4 | 1 | 1 | 1 | 4 | 15 | 5 | 50 | 1 | 21 | 4 | 6 | 5 | 10 | 16 | 76 | 74 |
Wind waves Height (m) Direction Period (s) | S 3 | SW 3 | SW 8 | SW 2 | SW 3 | SW 3 | SSW 3 | SW 3 | — | SSW 4 | SW 4 | — | SSW 4 | SSW 4 | — | SW 6 | SSW 7 | SW 3 | SW 3 | SW 3 |
| kJ | 5 | 3 | 9 | 1 | 1 | 2 | 1 | 2 | — | 2 | 7 | — | 1 | 1 | — | 2 | 11 | 3 | 2 | 4 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 511 | 30 | 30 | 954 | 30 | 30 | 583 | 282 | 6 | 352 | 0 | 0 | 11 | 0 | 0 | 0 | 0 | 0 | 11 | 2 |
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.
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