Asakawa Surf Break

Lat Long: 33.63° N 134.38° E

Asakawa Surf Forecast and Surf Report

Issued: 2 am 30 Jul 2026 (local time)

Forecast update in  hr  min

Today's Asakawa sea temperature is
28.3° C
0.9° 

Asakawa surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


Asakawa surf forecast from 29 Jul 2026:

  • Best quality surf: Wednesday 5 Aug, 6PM (local time) - 20ft (6.0m), 18s period, SE swell with cross-shore winds.
  • Most powerful swell: Thursday 6 Aug, 9AM (local time) - 26ft (8.0m), 18s period, SE swell with 37,604 kJ wave energy.
  • Next surfable swell (1★+): Saturday 1 Aug, 9PM (local time) - 1.5ft (0.4m), 11s 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 (Aug 01) at 9PM. The primary swell is predicted to be 0.2m and 18s period with a secondary swell of 0.4m and 11s. 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 8.0m 18s and forecast to arrive on Thursday (Aug 06) at 9AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.6m 3s period and expected on Sunday (Aug 02) at 9AM.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+) 9PM (Sat 1st Aug)1.5ft (0.4m) 11s
Best Surf 6PM (Wed 5th Aug)20ft (6.0m) 18s
Most Powerful 9AM (Thu 6th Aug)26ft (8.0m) 18s

Table - best surf conditions forecast for Asakawa over the next 16 days.


The Lowdown

G’day, Rusty here. Let’s have a look at what’s coming up for Asakawa.

Right now, it’s flat as a tack. We’ve got a run of tiny, weak swell and poor conditions through the end of July and into Saturday the 1st of August. The waves are barely 1ft, with short 10 to 13 second periods and combined energy staying under 60. The water’s sitting at 83°, which is pretty normal for this time of year. You’d be wasting your time getting wet.

Then things start to wake up. Sunday the 2nd of August, we finally get a decent pulse. The morning shows 2ft from the ESE with a 14 second period, and the combined energy jumps to 287. Wind is light cross-off from the NE, so it’s clean. By the afternoon, the swell pushes to 3ft, period stretches to 16 seconds, and energy hits 560. Still clean with that NE cross-off. It’s not huge, but it’s the first real surf of the outlook.

Monday the 3rd sees the swell building fast. Morning has 6ft from the ESE, 17 second period, and energy at 1784, but there’s a light cross-onshore wind that’s putting a bit of texture on it. The afternoon jumps to 7ft with the same direction and period, energy up to 2385, but the wind swings onshore from the SE. Conditions are marginal, so choose your session wisely.

Tuesday the 4th of August is where it gets interesting for the experienced crew. The morning is glassy with a 10ft swell from the ESE, 17 second period, and combined energy roaring at 4498. That’s a solid groundswell. It’s excellent for experts but too big for beginners. The afternoon brings risk of storms and onshore wind, so the window is tight.

Wednesday the 5th of August. This is the standout. Morning session sees 16ft from the SE, 18 second period, and energy at a massive 14075. The wind is cross-off from the NE, so it’s clean. This is proper, powerful groundswell – the kind that will shape up nicely at Asakawa’s point setup. The period is long, over 15 seconds, so expect long lulls between sets but serious grunt when they come. The afternoon holds 18ft from the SE, 18 second period, energy up at 19029, with a gentle cross-shore. That’s the pick of the fortnight.

Thursday the 6th is just too big. 26ft from the SE with 18 second period and energy over 37,000. Even with favourable wind, this is way beyond what most can handle. Same story into Friday the 7th, with 23ft to 20ft and strong cross-onshore winds. This is kite-surfing territory, not paddle surfing.

After that, the swell drops back through the second week. Saturday the 8th has 10ft from the SSW, but it’s choppy and onshore. Sunday the 9th is smaller and messy. By Monday the 10th and Tuesday the 11th, we get a bit of relief with 5ft to 5ft and some glassy windows, but nothing that compares to that Wednesday the 5th blast.

Thursday the 14th of August offers a nice little clean-up. Morning has 4ft from the ESE, 13 second period, with offshore wind from the north and combined energy at 862. The afternoon turns glassy with similar size. It’s a good, well-shaped option for a fun session.

Overall, don’t bother paddling out until Sunday the 2nd. The real heat is Wednesday the 5th – big, clean groundswell for those who can handle it. After that, the second week is quieter but has a few tidy windows if you’re keen for a paddle.

Rusty.

Short Range Forecast

Some drizzle, heaviest during Thu afternoon. Warm (max 33°C on Thu morning, min 27°C on Thu night). Wind will be generally light.

Days 4-6 Weather Summary

Light rain (total 5mm), mostly falling on Tue morning. Warm (max 34°C on Sun morning, min 26°C on Tue night). Wind will be generally light.

Thursday
30
Friday
31
Saturday
1
Sunday
2
Monday
3
Tuesday
4
Wednesday
5
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
0
0
0
0
0
0
0
0
1
2
2
3
3
2
3
5
3
8
8
7
!
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.4
SE
10
0.4
SE
10
0.4
SE
10
0.4
SE
9
0.3
SE
13
0.4
SE
10
0.4
SE
10
0.4
SE
11
0.4
SE
16
0.4
ESE
18
1
ESE
16
1.3
ESE
17
1.7
ESE
17
2.1
ESE
17
2.3
ESE
17
3
ESE
17
3
ESE
18
4
ESE
17
5
SE
18
5.5
SE
18
7
SE
18
Wave Graph
Metric surfscale
Energy kJ
23
23
23
24
26
23
28
29
64
120
534
946
1749
2352
3063
4461
5729
9480
14075
19029
29325
Wind (km/h)
5
ENE
10
SSE
5
NW
5
ESE
5
SE
5
WNW
5
E
5
SE
5
NW
10
NE
10
NE
10
N
5
ESE
15
SE
5
SSE
5
SE
15
SE
5
NNE
15
NE
15
ENE
20
NE
Wind State
cross
on
glassy
glassy
cross-on
glassy
glassy
on
off
cross-off
cross-off
cross-off
cross-on
on
on
glassy
on
glassy
cross-off
cross
cross-off
High Tide
7:11PM1.71m
6:24AM1.77m
7:36PM1.73m
7:00AM1.77m
8:00PM1.74m
7:37AM1.73m
8:25PM1.74m
8:17AM1.67m
8:51PM1.72m
9:03AM1.58m
9:19PM1.69m
9:59AM1.47m
9:52PM1.64m
Low Tide
12:32PM0.15m
00:44AM0.81m
1:02PM0.16m
1:15AM0.74m
1:31PM0.21m
1:47AM0.67m
2:00PM0.31m
2:22AM0.61m
2:31PM0.44m
3:01AM0.57m
3:03PM0.60m
3:47AM0.54m
3:40PM0.78m
clear
thunderstorm
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
thunderstorm
thunderstorm
clear
clear
clear
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:11
5:13
5:13
5:13
5:15
5:16
5:16
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:04
7:04
7:02
7:01
7:00
7:00
6:59
 mm
1
3
2
Temp °C
33
32
29
33
32
29
33
33
29
34
34
30
31
30
27
29
29
27
31
32
28
Feels °C
37
36
34
36
36
34
36
37
33
37
37
35
35
34
32
34
32
32
32
33
30
  • Map Icons:
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  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
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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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