Asakawa Surf Break

Lat Long: 33.63° N 134.38° E

Asakawa Surf Forecast and Surf Report

Issued: 2 pm 27 Aug 2026 (local time)

Forecast update in  hr  min

Today's Asakawa sea temperature is
29.0°C
1.3° 

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


Asakawa surf forecast from 27 Aug 2026:

  • Best quality surf: Monday 31 Aug, 9AM (local time) - 3.5ft (1.1m), 10s period, S swell with glassy winds.
  • Most powerful swell: Thursday 3 Sep, 9PM (local time) - 15ft (4.5m), 11s period, S swell with 4,408 kJ wave energy.
  • Next surfable swell (1★+): Friday 28 Aug, 12PM (local time) - 3.5ft (1.0m), 8s period with S 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 (Aug 28) at 12PM. The primary swell is predicted to be 1.0m and 8s period with a secondary swell of 0.3m and 8s. Another secondary swell of 0.2m and 9s is also forecast. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Asakawa in the next 16 days are 4.5m 11s and forecast to arrive on Thursday (Sep 03) at 9PM. Winds are predicted to be cross-onshore at the time the swell arrives.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+)12PM (Fri 28th Aug)3.5ft (1.0m) 8s
Best Surf 9AM (Mon 31st Aug)3.5ft (1.1m) 10s
Most Powerful 9PM (Thu 3rd Sep)15ft (4.5m) 11s

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


The Lowdown

Alright, let's look at the whole picture. The next few days are gonna be a bit of a grind. There's swell around, but the wind has got it all chopped up and messy. You've got some small, weak waves, but they're not worth the paddle. We gotta be patient.

Friday afternoon the 28th, the wind finally drops to glass. The swell is a small 3ft at 8 seconds from the SSW. It’s not going to be epic, but it's clean and there might be a few fun ones. Sunday morning the 30th, same story – glassy conditions and similar small, short-period swell. It’s surfable but nothing special. We're talking weak energy of 162, so you know there's not much push.

Then Monday morning the 31st, things start to look up. Light, glassy wind from the SE, and the swell pushes up to 4ft from the S with a 10-second period. Energy is moderate at 267. It’s not huge, but it’s clean and the conditions are finally right. This is the pick of the first week. Water temp is 84°, which is a touch warmer than normal for late August.

After that, the window slams shut. The wind goes onshore and starts to howl, and the swell builds right along with it. We're talking a lot of energy out there, over 1000 on Tuesday the 1st, but it's all blown out and stormy. The size jumps to 6ft and bigger, but it's a complete mess.

From Tuesday the 1st through the 8th, it's just storm after storm. Swell heights build to 13ft, even 18ft, but with strong onshore winds, it's going to be a disaster. This is not surfable. The point might have some shelter, but with that much wind and size, it's just a washing machine.

But then, we get a real turn. Tuesday afternoon the 8th, the wind does a complete flip, going glassy from the WNW. The swell has dropped to a solid 10ft from the SSE with a 10-second period. The energy is strong at 2042. This is the first real standout. This is when Asakawa starts to show its stuff.

Wednesday morning the 9th looks even better. A light, cross-offshore breeze from the NNE, clean conditions, and a pumping 10ft of SSE swell with plenty of energy (3184). This is the best session on offer. For experts only, this is going to be firing.

We get a nice cleanup on Thursday the 10th. Dead calm, glassy from the SE, and the swell settles to a very respectable 8ft from the SSE on a 9-second period. Energy is moderate at 848. Another good day for someone who knows what they're doing.

The run continues into Friday the 11th. The swell backs off a touch to 6ft, but it's still glassy in the morning with a light E breeze. It won't have the power of the previous two days, but it'll still be a fun, clean session.

So, the start is a dud, the middle is a full-on storm. But the end of the window, from the 8th to the 11th, is where it's at. That Wednesday the 9th is the standout – clean, solid, and powerful. It's a long-range promise, so don't hold your breath, but it's definitely something to get excited about. Asakawa is an inconsistent spot, so when it does line up, you make the most of it.

Rusty.

Short Range Forecast

Light rain (total 5mm), mostly falling on Fri afternoon. Warm (max 31°C on Thu afternoon, min 26°C on Fri night). Wind will be generally light.

Days 5-7 Weather Summary

Heavy rain (total 63mm), heaviest during Tue afternoon. Warm (max 30°C on Sun afternoon, min 25°C on Sun night). Winds increasing (calm on Sun night, fresh winds from the SSE by Wed morning).

Thu
27
Friday
28
Saturday
29
Sunday
30
Monday
31
Tuesday
1
Wednesday
2
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
0
1
0
1
0
0
0
0
1
0
0
2
0
1
0
0
0
0
0
0
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.5
S
10
1.4
S
9
0.9
SSW
8
0.9
SSW
8
0.8
SSW
8
0.9
SSW
8
1.1
SSW
4
0.9
SSW
7
0.9
SSW
7
0.9
SSW
7
0.6
S
11
1.1
S
10
1.1
SSE
10
1.2
SSE
9
1.8
SSE
9
1.9
SSE
9
2.2
SSE
10
2.4
SSE
10
2.5
SSE
10
3.5
SSE
11
Wave Graph
Metric surfscale
Energy kJ
398
313
85
87
73
107
38
78
74
76
91
239
240
265
549
606
838
1021
1393
2715
Wind (km/h)
20
SSW
15
WSW
10
SW
5
SSE
10
WSW
10
SW
15
SSW
10
WSW
5
SE
15
SSW
10
WSW
5
SE
10
SE
10
E
20
E
25
SE
25
SSE
30
SSE
30
SSE
35
SSE
Wind State
cross-on
cross
cross-on
glassy
cross
cross
cross-on
cross
glassy
cross-on
cross
glassy
on
cross-on
cross-on
cross-on
on
on
on
on
High Tide
6:08PM1.73m
5:36AM1.78m
6:30PM1.78m
6:12AM1.83m
6:52PM1.81m
6:48AM1.84m
7:14PM1.82m
7:26AM1.80m
7:38PM1.81m
8:07AM1.73m
8:03PM1.78m
8:53AM1.61m
8:30PM1.72m
Low Tide
11:50PM0.72m
12:05PM0.20m
00:18AM0.60m
12:33PM0.23m
00:48AM0.49m
1:02PM0.31m
1:19AM0.40m
1:31PM0.43m
1:53AM0.35m
2:01PM0.58m
2:31AM0.33m
2:32PM0.75m
part cloud
part cloud
rain showers
thunderstorm
clear
part cloud
part cloud
clear
part cloud
thunderstorm
clear
clear
clear
thunderstorm
mod rain
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:31
5:33
5:33
5:35
5:35
5:35
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:35
6:34
6:32
6:30
6:30
6:29
6:28
 mm
1
4
2
8
7
13
20
13
12
21
Temp °C
31
27
30
29
26
31
31
27
29
30
26
30
29
26
27
27
27
27
27
27
Feels °C
33
31
35
35
31
33
33
31
34
34
30
33
31
31
29
29
29
28
28
27
  • 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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