Asakawa Surf Break

Lat Long: 33.63° N 134.38° E

Asakawa Surf Forecast and Surf Report

Issued: 8 pm 18 Aug 2026 (local time)

Forecast update in  hr  min

Today's Asakawa sea temperature is
28.2° C
0.5° 

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


Asakawa surf forecast from 18 Aug 2026:

  • Best quality surf: Wednesday 26 Aug, 12AM (local time) - 4.5ft (1.3m), 12s period, SE swell with cross-offshore winds.
  • Most powerful swell: Wednesday 26 Aug, 3AM (local time) - 5.5ft (1.7m), 14s period, SSE swell with 1,019 kJ wave energy.
  • Next surfable swell (1★+): Wednesday 19 Aug, 6AM (local time) - 2.5ft (0.7m), 8s period with ESE 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 Wednesday (Aug 19) at 6AM. The primary swell is predicted to be 0.7m and 8s period with a secondary swell of 0.4m 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 1.7m 14s and forecast to arrive on Wednesday (Aug 26) at 3AM. Winds are predicted to be cross-offshore at the time the swell arrives.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+) 6AM (Wed 19th Aug)2.5ft (0.7m) 8s
Best Surf12AM (Wed 26th Aug)4.5ft (1.3m) 12s
Most Powerful 3AM (Wed 26th Aug)5.5ft (1.7m) 14s

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 on the menu for the Asakawa region.

First thing you need to know: Asakawa is a point break that’s intermediate level, inconsistent, and picks up swell from the southeast. It’s fairly exposed. Right now, the opening days are a write-off. Wednesday the 19th and Thursday the 20th are all tiny, messy, onshore slop—nothing worth paddling out for. The combined energy is way under 100 (93 and 55), so don’t bother.

Things start to look a little interesting by Friday the 21st, but only just. The swell ticks up to 3 feet from the south with a 9-second period, and the morning is glassy. The wave energy climbs to 175 (moderate), but it’s still ordinary. That glassy window is the only real chance for a few weak, clean waves. Saturday and Sunday mornings offer similar very small, glassy surf—3 feet from the south-southwest—so if you’re desperate for a quick paddle and don’t mind small waves, those windows are your best early bet.

After that, we hit another dry patch. Monday the 24th and Tuesday morning the 25th are weak and uninspiring. But then, Tuesday afternoon on the 25th sees a shift. A 3-foot southeast swell rolls in with a 14-second groundswell period, and the wind goes glassy. The energy jumps to 416 (strong). This is the first real standout: clean, long-period lines coming into the point break. It won’t be big, but the quality will be there. Keep in mind, this spot is inconsistent, so if it’s breaking, get on it early.

The next few days are a bit of a mess. From the 26th to the 29th, we get a big pulse of swell—up to 10 feet—but it’s accompanied by strong onshore or cross-onshore winds. The wave energy is very strong (1434 to 3374), but the wind is howling from the southeast at 12-22 mph. It’s going to be lumpy and blown-out, and at that size with poor wind, it’s only for the very experienced. Honestly, it might be more interesting for kitesurfers than paddle surfers in those conditions.

The real payoff comes at the end of the period. Sunday the 30th of August into Monday the 31st, the winds swing offshore or glassy. Swell sits at a solid 6 to 8 feet from the south-southwest, with a long 13-14 second period. Wave energy is massive (2594 to 3754). The offshore and clean wind makes this an excellent window for experienced surfers. If you’ve got the skills, this is the time.

And then—mark your calendars—on Tuesday the 1st of September, morning brings a 10-foot south swell with a 16-second period, glassy winds, and exceptional conditions for experts. The energy reads 7037 (very strong). Followed by Wednesday the 2nd: morning glassy again, with a 15-foot east-southeast swell, 11-second period, and energy at 9316. This is huge, heavy, and for experts only. The point should handle the long period well, but it’s not a day for beginners by any stretch.

Overall, the standouts are Tuesday afternoon on the 25th for clean, longer-period small waves, and the window from Sunday the 30th through Wednesday the 2nd for serious, clean, powerful surf for those who can handle it.

Stay safe, stay stoked.

Rusty.

Short Range Forecast

Light rain (total 6mm), mostly falling on Tue night. Warm (max 30°C on Thu morning, min 25°C on Tue night). Wind will be generally light.

Days 5-7 Weather Summary

Mostly dry. Warm (max 30°C on Sat morning, min 25°C on Fri night). Wind will be generally light.

Wednesday
19
Thursday
20
Friday
21
Saturday
22
Sunday
23
Monday
24
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
1
0
0
0
0
0
0
1
0
0
1
0
0
1
0
0
0
0
1
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.7
SE
8
0.7
ESE
8
0.7
ESE
8
0.4
SE
10
0.4
SE
10
0.4
SE
10
0.8
S
9
0.9
S
9
0.9
S
9
0.9
SSW
9
0.9
SSW
9
0.8
SSW
9
0.9
SSW
9
0.9
SSW
10
0.8
SSW
10
0.8
SSW
9
0.7
SSW
9
0.7
SSW
10
0.6
SSW
10
Wave Graph
Metric surfscale
Energy kJ
69
56
51
29
25
34
102
127
133
138
138
110
119
148
105
90
71
86
60
Wind (km/h)
5
S
5
SE
10
SSE
5
WSW
5
SSE
10
SSE
5
WSW
5
ESE
10
S
5
WSW
5
SE
10
S
5
WSW
5
SSE
15
S
5
SW
5
SE
10
SSE
0
SSW
Wind State
glassy
on
on
glassy
glassy
on
cross
glassy
cross-on
cross
glassy
on
cross
glassy
on
cross-on
on
on
glassy
High Tide
9:01PM1.65m
10:05AM1.37m
9:25PM1.57m
11:17AM1.25m
9:52PM1.48m
2:05PM1.21m
10:36PM1.39m
4:20PM1.32m
00:36AM1.34m
4:43PM1.42m
2:31AM1.38m
5:04PM1.52m
Low Tide
3:42AM0.53m
3:19PM0.92m
4:31AM0.59m
3:42PM1.07m
5:42AM0.66m
4:07PM1.20m
7:28AM0.66m
8:19PM1.26m
8:57AM0.58m
9:51PM1.18m
9:51AM0.47m
10:27PM1.07m
thunderstorm
thunderstorm
thunderstorm
clear
clear
part cloud
clear
clear
thunderstorm
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:26
5:26
5:28
5:28
5:28
5:30
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:45
6:45
6:44
6:43
6:40
6:39
6:38
 mm
2
1
2
1
Temp °C
26
28
28
26
30
29
26
30
29
26
30
30
26
30
30
26
30
29
25
Feels °C
31
32
32
31
33
33
31
33
32
30
33
33
30
33
33
31
33
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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