
Surf Forecasts:
Asakawa surf forecast from 23 Jul 2026:
- Best quality surf: Friday 24 Jul, 3AM (local time) - 1ft (0.3m), 18s period, SE swell with glassy 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, 3AM (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 3AM. The primary swell is predicted to be 0.3m and 18s period with a secondary swell of 0.3m and 10s. 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 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+) | 3AM (Fri 24th Jul) | 1ft (0.3m) 18s |
| Best Surf | 3AM (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 folks, Rusty here. Let’s have a look at what’s in store for us at Asakawa over the next couple of weeks.
First up, a bit of a slow start. Through the end of July and into the first day of August, we’ve got tiny, weak swell, mostly around 1 ft to 1 ft from the southeast. The combined swell energy is pretty low, sitting between 73 and 175 (moderate energy on the higher end there). The wind is glassy though, which is a real treat, so if you’re desperate for a paddle and a bit of a trim, you could get out there, but it’s pretty ordinary. This stretch is really for the die-hards with a longboard.
Then we hit Sunday, August 2nd, and things start to shift. The swell picks up a bit, hitting 2 ft from the SSW early on, with the energy jumping to 255 (moderate). The morning is glassy, but by the afternoon the wind goes cross-on and the swell pushes to 4 ft, making it a bit messy. Still not the standout.
Now, here’s where it gets interesting. The real action starts on Monday, August 3rd. The morning at Asakawa is looking like the best on offer for the first week. We’ve got a 4 ft groundswell from the SSW, with a long period of 14 seconds, and the combined energy is a solid 677 (moderate). The wind is glassy – dead calm – so the surface will be like a mirror. This is a classic point break setup, and that long period groundswell will wrap in nicely, giving you some proper shaped waves. It’s an intermediate break, so not one for the groms, but for the rest of you, this is the call. The water temp is about average for the time of year, nothing unusual.
After that little window, the wind gets messy on the 3rd afternoon and through the 4th, with the swell turning from the ESE. The energy climbs rapidly, hitting 1007 (strong) on the Tuesday morning, but the wind is onshore or cross-on, so it’s going to be a choppy, tough paddle. The swell is getting bigger, up to 5 ft, but the conditions aren’t clean.
The big one, the one you’ve been waiting for, is a full week away. Wednesday, August 5th, the morning session is a true standout. A 8 ft swell from the ESE, with a period of 16 seconds (very long period groundswell), and the energy is a massive 2817 (strong to very strong). The wind is glassy. This is a serious groundswell. At 8 ft, it’s getting into the territory for experienced surfers only. The long period will make it powerful and the sets will be well-spaced, making the paddle out a bit easier. It’s a point break, so it should handle that long period beautifully.
Then, if you’re an expert and you’re feeling brave, Thursday, August 6th and Friday, August 7th mornings are absolutely pumping. Thursday morning sees an 12 ft swell from the ESE, period of 17 seconds, and energy at 7004 (very strong). Friday morning is even bigger, a 13 ft swell from the ESE, 18 seconds, and energy hitting 10180 (very strong). Both mornings have glassy conditions. This is expert-only territory. The waves will be thick, powerful, and moving fast. For the average surfer, this is a spectator sport. The afternoon winds turn onshore, so the window is tight.
After that big pulse, the swell drops back down to a 5 ft E swell on Saturday, August 8th, with clean morning winds, offering a more manageable but still fun session. The energy is 887 (moderate), so it’s a nice way to come down from the big stuff.
So, to wrap it up: You’ve got a long, flat spell, one good morning on the 3rd of August, and then a massive, expert-level groundswell window from the 5th to the 7th of August. If you’re average, aim for the 3rd. If you’re a charger, you know what to do.
Rusty.
Short Range ForecastModerate rain (total 11mm), heaviest on Sun afternoon. Warm (max 33°C on Sat morning, min 27°C on Fri night). Wind will be generally light. | Days 5-7 Weather SummaryModerate rain (total 14mm), heaviest on Mon afternoon. Warm (max 32°C on Mon morning, min 25°C on Mon night). Wind will be generally light. | ||||||||||||||||||
Friday 24 | Saturday 25 | Sunday 26 | Monday 27 | Tuesday 28 | Wednesday 29 | ||||||||||||||
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 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 | |||||||||||||||||||
50 | 49 | 49 | 42 | 91 | 90 | 87 | 78 | 76 | 74 | 72 | 70 | 65 | 67 | 49 | 48 | 48 | 48 | 47 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | glassy | glassy | off | glassy | glassy | off | glassy | glassy | off | glassy | glassy | off | glassy | glassy | off | cross-off | cross-off | off |
High Tide | 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 | 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 | — | — | 5:09 | — | — | 5:09 | — | — | 5:09 | — | — | 5:11 | — | — | 5:11 | — | — | |
7:08 | — | 7:08 | — | — | 7:07 | — | — | 7:07 | — | — | 7:07 | — | — | 7:06 | — | — | 7:05 | — | |
mm | — | — | 2 | — | — | 2 | 1 | 1 | 5 | 2 | — | 7 | — | — | 4 | — | — | 1 | — |
Temp °C | 29 | 32 | 32 | 29 | 33 | 32 | 28 | 31 | 31 | 28 | 32 | 29 | 27 | 30 | 30 | 27 | 31 | 31 | 27 |
Feels °C | 34 | 36 | 37 | 34 | 37 | 37 | 32 | 35 | 36 | 33 | 36 | 34 | 32 | 34 | 35 | 32 | 34 | 35 | 32 |
Swell 1 Height (m) Direction Period (s) | SE 10 | SE 10 | SE 9 | SE 11 | SE 11 | SE 10 | SE 10 | SE 10 | SE 11 | S 8 | S 8 | S 9 | S 9 | ESE 10 | SE 10 | SE 10 | SE 10 | SE 10 | SE 10 |
16 | 23 | 14 | 41 | 40 | 35 | 48 | 50 | 55 | 50 | 47 | 55 | 54 | 67 | 49 | 48 | 48 | 48 | 47 | |
Swell 2 Height (m) Direction Period (s) | SSW 3 | SE 18 | SE 18 | SE 16 | SE 16 | SE 16 | SE 16 | SE 15 | S 9 | SE 11 | SE 10 | SE 10 | SE 10 | S 8 | S 8 | SSW 8 | SSW 8 | SSW 8 | SSW 8 |
1 | 49 | 49 | 42 | 91 | 90 | 87 | 78 | 39 | 40 | 51 | 50 | 50 | 36 | 35 | 22 | 22 | 21 | 12 | |
Swell 3 Height (m) Direction Period (s) | SE 18 | SSW 4 | SE 12 | SW 4 | S 8 | S 8 | SSW 8 | S 9 | SE 15 | SE 14 | SE 14 | SE 14 | SE 14 | SE 14 | SE 13 | SE 13 | SSW 5 | SE 13 | SE 12 |
50 | 1 | 21 | 1 | 5 | 5 | 11 | 26 | 76 | 74 | 72 | 70 | 65 | 29 | 28 | 27 | 4 | 26 | 24 | |
Wind waves Height (m) Direction Period (s) | SW 3 | N 2 | — | SW 4 | — | NE 3 | — | NNE 3 | — | SW 3 | N 2 | — | SW 3 | — | — | SW 4 | N 2 | — | — |
4 | 1 | — | 5 | — | 2 | — | 2 | — | 2 | 1 | — | 3 | — | — | 9 | 1 | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Best forecast wave conditions in Shikoku | |||||||||||||||||||
Best forecast wave conditions in Japan | |||||||||||||||||||
Header Global | |||||||||||||||||||
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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.










