Asakawa Surf Break

Lat Long: 33.63° N 134.38° E

Asakawa Surf Forecast and Surf Report

Issued: 8 am 28 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 28 Aug 2026:

  • Best quality surf: Tuesday 1 Sep, 12AM (local time) - 4.5ft (1.4m), 10s period, SSE swell with glassy winds.
  • Most powerful swell: Wednesday 2 Sep, 6PM (local time) - 10ft (3.0m), 10s period, S swell with 1,853 kJ wave energy.
  • Next surfable swell (1★+): Saturday 29 Aug, 9PM (local time) - 2ft (0.6m), 7s 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 Saturday (Aug 29) at 9PM. The primary swell is predicted to be 0.6m and 7s period with a secondary swell of 0.3m and 11s. Another secondary swell of 0.6m and 4s 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 3.0m 10s and forecast to arrive on Wednesday (Sep 02) at 6PM. Winds are predicted to be onshore at the time the swell arrives.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+) 9PM (Sat 29th Aug)2ft (0.6m) 7s
Best Surf12AM (Tue 1st Sep)4.5ft (1.4m) 10s
Most Powerful 6PM (Wed 2nd Sep)10ft (3.0m) 10s

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 table for Asakawa over the next couple of weeks.

Right off the bat, we’ve got a rough stretch ahead. The first week is a total write-off for any decent paddle surfing. The wind is almost always cross-onshore or onshore, and the guidance tells me Asakawa is an inconsistent point break that needs a clean offshore to really fire. From Friday the 28th of August right through to Saturday the 5th of September, the conditions are just poor. Swell is small and weak, with the combined wave energy barely cracking 100 (97) on the Sunday morning, though that morning does go glassy with a clean 2ft S swell. But it’s just too small to get excited about. There’s a long gap here with no real recommendations.

Now, hold on to your board shorts because things shift in the second week. Sunday the 6th of September is where it starts to get interesting. The morning kicks off with a glassy cross-offshore wind from the NNE, light at 6 mph, and a clean 3ft S groundswell with a very long period of 14 seconds. The combined energy jumps to 1037 – that’s moderate to strong energy. This is a point break, so that long period swell will wrap in beautifully and produce well-shaped, lined-up waves. The afternoon is even better: the swell pumps up to 8ft from the SSE, period still solid at 13 seconds, and the combined energy is a massive 2975. Winds stay clean and cross-offshore. This is excellent, powerful surf, but at 8ft it’s pushing into expert territory. This is the standout of the whole forecast.

Monday the 7th sees the swell dropping back and the wind turning a bit lumpy, so it’s more marginal. But then look at Saturday the 12th of September. The morning is absolutely glassy – dead calm, 0 mph wind – with a massive 13ft SE groundswell riding a very long 14-second period. The combined energy is a monstrous 8089. This is exceptional surf, but only for the most experienced crew. That kind of size and power at a point break means it will be a heavy, challenging paddle. If you’re not a pro, sit this one out. The afternoon drops slightly to 12ft but gets a cross-onshore bump, so the morning window is your golden ticket.

Overall, this is a tale of two weeks. The first six to seven days are a complete bust. The second week delivers a couple of absolute gems, with Sunday the 6th and Saturday the 12th being the clear standouts, though the 12th is strictly for experts.

Stay stoked, and keep an eye on that forecast.

Rusty.

Short Range Forecast

Light rain (total 9mm), mostly falling on Sun morning. Warm (max 31°C on Fri morning, min 24°C on Sun night). Wind will be generally light.

Days 4-6 Weather Summary

Heavy rain (total 78mm), heaviest during Tue afternoon. Warm (max 30°C on Mon afternoon, min 26°C on Mon night). Wind will be generally light.

Friday
28
Saturday
29
Sunday
30
Monday
31
Tuesday
1
Wednesday
2
Thursday
3
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
1
0
0
1
0
2
0
0
0
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)
0.9
SSW
8
1
SSW
8
0.8
SSW
8
1
SSW
8
1
SSW
7
0.8
SSW
8
0.7
S
7
0.6
S
7
0.6
S
7
0.9
S
11
1.1
S
10
1.4
SSE
10
1.9
SSE
9
2.1
SSE
10
2.3
SSE
10
2.5
SSE
10
3
SSE
10
2.5
SSE
10
2.5
S
10
2.1
S
10
1.9
S
10
Wave Graph
Metric surfscale
Energy kJ
105
116
73
110
117
75
54
39
37
185
230
386
605
795
943
1322
1618
1452
1360
878
716
Wind (km/h)
10
SW
15
SSW
15
WSW
5
SW
15
SSW
10
WSW
5
SE
10
S
10
WSW
5
SE
15
SE
5
SSE
20
SE
25
SSE
25
SSE
25
SSE
25
SSE
20
SSE
40
SE
30
S
25
SSW
Wind State
cross-on
cross-on
cross
cross
cross-on
cross
glassy
cross-on
cross
glassy
on
glassy
cross-on
on
on
on
on
on
on
cross-on
cross-on
High Tide
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
9:51AM1.47m
9:02PM1.65m
Low Tide
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
3:16AM0.36m
3:06PM0.93m
thunderstorm
thunderstorm
part cloud
clear
thunderstorm
clear
rain showers
thunderstorm
clear
clear
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
rain showers
thunderstorm
thunderstorm
thunderstorm
rain showers
<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
5:37
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:34
6:32
6:30
6:30
6:29
6:28
6:25
 mm
1
2
1
2
3
1
6
8
12
16
8
10
17
19
11
7
Temp °C
31
31
27
31
30
27
29
29
26
29
30
27
27
27
27
27
27
27
27
27
27
Feels °C
34
35
31
34
33
32
34
33
30
32
33
32
30
29
29
29
29
29
27
28
28
  • Map Icons:
  • Break
  • 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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