
Surf Forecasts:
Asakawa surf forecast from 27 Jul 2026:
- Best quality surf: Monday 3 Aug, 9PM (local time) - 5.5ft (1.7m), 16s period, ESE swell with glassy winds.
- Most powerful swell: Monday 3 Aug, 9PM (local time) - 5.5ft (1.7m), 16s period, ESE swell with 1,341 kJ wave energy.
- Next surfable swell (1★+): Monday 27 Jul, 9PM (local time) - 1.5ft (0.4m), 14s 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 Monday (Jul 27) at 9PM. The primary swell is predicted to be 0.4m and 14s period with a secondary swell of 0.6m and 9s. Another secondary swell of 0.5m and 10s 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 1.7m 16s and forecast to arrive on Monday (Aug 03) at 9PM. Winds are predicted to be glassy at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.3m 3s period and expected on Friday (Jul 31) at 9AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9PM (Mon 27th Jul) | 1.5ft (0.4m) 14s |
| Best Surf | 9PM (Mon 3rd Aug) | 5.5ft (1.7m) 16s |
| Most Powerful | 9PM (Mon 3rd Aug) | 5.5ft (1.7m) 16s |
Table - best surf conditions forecast for Asakawa over the next 16 days.
The Lowdown
Alright, so the first few days are flat as a pancake, but don't walk away – this one's got a massive, classic groundswell brewing on the horizon. Gotta be patient.
The first bits of interest are tiny. Monday afternoon, 27 July, we have glassy conditions at Asakawa – a point break – with a weak 1ft swell from the SE. It's surfable, but very ordinary. The water is warm at 83°, feeling about normal for this time of year. The combined energy is a low 174, so don't get your hopes up. Tuesday and Wednesday are more of the same – small, clean but barely breaking. There's a real lull from Thursday 30 July right through to Monday 3 August; the swell drops right out, with energy readings falling below 100. Nothing to get wet for.
Then the change arrives. On Monday 3 August, the swell starts to build properly. By Monday morning, we get a 4ft ESE swell with a period of 15 seconds. The energy jumps to 786 – moderate now – and the wind is light cross-shore. It's marginal, but the window is opening.
Now, the standout. The real magic is forecast for Tuesday 6 August. The morning of Thursday 6 August is the pick of the whole run. We're looking at a massive 15ft swell from the ESE, with a very long period of 18 seconds. The combined energy is a massive 11301 (strong to very strong wave energy). The wind is glassy – absolutely dead calm. It's the kind of morning that will have you calling in sick. The water temp is still warm. This is excellent to exceptional surf for experienced surfers, but that size is strictly for experts. The long period groundswell can make a point break like this really line up, but it'll be thick and powerful.
Wednesday 5 August is also a cracking day, with a 10ft to 12ft ESE swell, glassy morning wind, and very long 18-second periods. The energy is also very strong (6227-7122). Another day for the quiver.
From Friday 7 August onwards, the swell goes absolutely nuts. The wave heights exceed 23ft, and the energy values are astronomical (over 30000). While the wind is offshore and clean, the swell is far too big for this break. It's a spectacular sight, but not for paddling. This setup would be more interesting for the big-wave tow crew or kite surfers, not a standard paddle session.
The swell then winds down, but the 10th of August still has a 16ft SE swell with glassy conditions, though the period drops to 10 seconds. It's still for experts only. By the 11th, we're back to small, choppy, and onshore junk.
So, bottom line: the first week is a write-off. The absolute standout is the morning of Thursday 6 August – that's the one to circle. The morning of Wednesday 5 August is a very close second. Get on it.
Rusty
Short Range ForecastLight rain (total 7mm), mostly falling on Mon afternoon. Warm (max 33°C on Tue morning, min 27°C on Tue night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 33°C on Fri morning, min 27°C on Sat night). Wind will be generally light. | |||||||||||||||||||
Mon 27 | Tuesday 28 | Wednesday 29 | Thursday 30 | Friday 31 | Saturday 1 | Sunday 2 | ||||||||||||||
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 14 | SE 14 | SE 10 | SE 10 | SSW 6 | SE 10 | SE 10 | ESE 10 | SE 10 | SE 10 | SE 10 | SE 9 | SE 9 | SE 11 | SE 10 | SE 11 | SE 11 | ESE 17 | ESE 16 | ESE 15 |
Wave Graph | ||||||||||||||||||||
70 | 65 | 51 | 54 | 48 | 48 | 48 | 38 | 23 | 23 | 23 | 24 | 23 | 20 | 28 | 40 | 30 | 59 | 100 | 411 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | cross-off | glassy | cross-on | off | glassy | on | glassy | glassy | on | off | glassy | cross-on | off | glassy | on | glassy | cross-on | on | glassy |
High Tide | 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 | 7:00AM1.77m | 8:00PM1.74m | 7:37AM1.73m | 8:25PM1.74m | |||||||
Low Tide | 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 | 1:31PM0.21m | 1:47AM0.67m | 2:00PM0.31m | 2:22AM0.61m | |||||||
— | — | 5:11 | — | — | 5:11 | — | — | 5:11 | — | — | 5:13 | — | — | 5:13 | — | — | 5:13 | — | — | |
7:07 | — | — | 7:06 | — | — | 7:05 | — | — | 7:04 | — | — | 7:04 | — | — | 7:02 | — | — | 7:01 | — | |
mm | 4 | — | — | 1 | — | 1 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 31 | 28 | 33 | 32 | 29 | 31 | 32 | 29 | 33 | 32 | 29 | 33 | 33 | 29 | 32 | 32 | 28 | 32 | 31 | 28 |
Feels °C | 36 | 32 | 37 | 36 | 34 | 35 | 36 | 33 | 37 | 36 | 34 | 36 | 36 | 33 | 34 | 35 | 32 | 36 | 35 | 33 |
Swell 1 Height (m) Direction Period (s) | S 9 | S 8 | S 8 | SE 10 | SSW 6 | SSW 6 | SE 10 | SSW 5 | SE 10 | SE 10 | SE 10 | SE 9 | SE 9 | SE 10 | SE 10 | SE 11 | SE 11 | ESE 12 | ESE 12 | ESE 15 |
54 | 51 | 51 | 49 | 48 | 27 | 48 | 11 | 23 | 23 | 23 | 23 | 23 | 14 | 28 | 40 | 30 | 30 | 85 | 411 | |
Swell 2 Height (m) Direction Period (s) | SE 10 | SE 10 | SE 10 | SE 13 | SE 10 | SE 10 | SSW 8 | ESE 10 | SSW 8 | SSW 6 | SW 5 | SSW 5 | SE 13 | SE 11 | SW 4 | — | ESE 13 | ESE 9 | ESE 16 | SE 10 |
50 | 50 | 49 | 28 | 48 | 48 | 11 | 38 | 19 | 4 | 7 | 2 | 6 | 20 | 1 | — | 17 | 15 | 100 | 16 | |
Swell 3 Height (m) Direction Period (s) | SE 14 | SE 14 | SE 14 | E 16 | SSW 8 | SSW 8 | SE 13 | SSW 8 | SE 14 | SSW 7 | SSW 7 | SE 12 | SSW 4 | S 7 | S 7 | S 7 | ESE 9 | ESE 17 | SE 9 | S 8 |
70 | 65 | 29 | 5 | 14 | 12 | 26 | 11 | 8 | 5 | 5 | 24 | 2 | 4 | 1 | 1 | 8 | 59 | 14 | 5 | |
Wind waves Height (m) Direction Period (s) | — | SW 3 | SW 4 | SSW 8 | — | — | SSW 6 | — | — | — | — | NE 3 | NE 3 | — | NNE 3 | — | — | — | — | — |
— | 1 | 8 | 54 | — | — | 22 | — | — | — | — | 2 | 2 | — | 1 | — | — | — | — | — | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 11 | 0 | 0 | 4 | 1 | 2 | 372 | 30 | 2 | 511 | 553 | 2341 | 575 | 1 | 30 | 11 | 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.










