Asakawa Surf Break

Lat Long: 33.63° N 134.38° E

Asakawa Surf Forecast and Surf Report

Issued: 2 am 27 Aug 2026 (local time)

Forecast update in  hr  min

Today's Asakawa sea temperature is
28.9°C
1.2° 

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


Asakawa surf forecast from 26 Aug 2026:

  • Best quality surf: Monday 31 Aug, 9AM (local time) - 3.5ft (1.1m), 11s period, SSE swell with glassy winds.
  • Most powerful swell: Wednesday 2 Sep, 3PM (local time) - 7.5ft (2.3m), 10s period, SSE swell with 1,079 kJ wave energy.
  • Next surfable swell (1★+): Friday 28 Aug, 3PM (local time) - 2.5ft (0.7m), 8s period with SSW 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 3PM. The primary swell is predicted to be 0.7m and 8s period with a secondary swell of 0.7m and 8s. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Asakawa in the next 16 days are 2.3m 10s and forecast to arrive on Wednesday (Sep 02) at 3PM. Winds are predicted to be onshore at the time the swell arrives.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+) 3PM (Fri 28th Aug)2.5ft (0.7m) 8s
Best Surf 9AM (Mon 31st Aug)3.5ft (1.1m) 11s
Most Powerful 3PM (Wed 2nd Sep)7.5ft (2.3m) 10s

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


The Lowdown

Right, folks, Rusty here. Let’s have a look at the next 16 days for Asakawa. It’s a point break, inconsistent, and it shows. The start of the run is a write-off, but there’s a couple of moments that’ll get the blood pumping.

For the first few days, we’re in the doldrums. From Thursday 27th August right through to the end of the month, it’s pretty grim. You’ve got cross-onshore winds and tiny, weak swell. The energy is weak (between 87 and 210), and the wave comment is all “poor surf conditions.” Friday 28th afternoon and Sunday 30th morning have a glimmer – glassy or clean conditions – but with ankle-to-knee high swell and periods around 8 seconds, it’s barely a session. Honestly, not worth paddling out for.

Then, Monday 31st August morning looks like the first real chance. The sky clears, the wind goes glassy, and we see a 4ft SSE swell pushing in at a 10-second period. The combined energy is moderate (289). The wave comment says “expect good surf conditions.” It’s a small window, but it’s clean and the best on offer in the first week. The water temp is about average for this time of year.

But hold on, because the real story starts after a gap of poor conditions. From Tuesday 1st September through to Monday 7th September, the wind stays onshore or cross-onshore, often fresh, and the swell gets big but messy. The wave comment is mostly “poor surf conditions.” The energy is strong to very strong (between 810 and 2275), but it’s all blown out. It’s a beach-and-reef setup, so honestly, with that much wind and lumpy water, it looks more interesting for the kite crew than for paddle surfing.

Then, Wednesday 9th September morning. That’s the standout. The wind goes glassy, the rain showers clear, and we get a solid 6ft S swell at a very long 14-second period. The combined energy is strong (1225). The wave comment is “expect very good surf conditions.” This is a groundswell – long period, fat lines – so at a point break like Asakawa, that’s the perfect recipe. It’s a bit much for beginners at over 5ft, but for the experienced crew, Wednesday 9th afternoon is even better. Swell bumps to 7ft from the S, still glassy, same very long period, with the energy jumping to 1849. The wave comment says “excellent surf conditions for experienced surfers.” That’s your pick of the entire forecast.

Thursday 10th September morning keeps the glassy, clean conditions with a 6ft S swell (13 seconds, energy 1503) – another “excellent” call. By the afternoon, the wind goes light cross-onshore, and the quality drops a touch. Friday 11th September morning cleans up again with a cross-offshore wind and a 6ft SSE swell at 11 seconds. The energy is very strong (2253), and the wave comment is “excellent surf conditions for experienced surfers.”

So, the two true standouts? Wednesday 9th September afternoon and Thursday 10th September morning. Both have glassy conditions, a solid S groundswell at a very long period, and powerful energy. It’s a point break, so those long lines will set up beautifully. It’s a promising window, but it’s a week and a half away, so keep an eye on the charts. The rest of the run is a waiting game. Stay salty, folks. Rusty.

Short Range Forecast

Light rain (total 8mm), mostly falling on Fri afternoon. Warm (max 31°C on Thu morning, min 25°C on Fri night). Wind will be generally light.

Days 4-6 Weather Summary

Heavy rain (total 60mm), heaviest during Tue night. Warm (max 30°C on Sun morning, min 25°C on Sun night). Wind will be generally light.

Thursday
27
Friday
28
Saturday
29
Sunday
30
Monday
31
Tuesday
1
Wednesday
2
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
1
0
1
0
1
0
0
0
0
0
0
0
2
1
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)
1.4
SSW
10
1.1
SSE
10
1.2
S
9
0.8
SSW
8
0.7
SSW
8
0.8
S
8
0.8
SSW
7
1
SSW
8
0.8
SSW
7
0.9
SSW
7
0.4
SE
10
0.5
S
12
1.1
SSE
11
1.2
SSE
10
1.4
SSE
10
1.6
SSE
10
1.9
SSE
10
2
SSE
10
2
SSE
10
2.3
SSE
10
1.9
SSE
10
Wave Graph
Metric surfscale
Energy kJ
371
218
235
87
68
71
71
107
73
76
37
71
286
324
356
472
702
826
803
1079
660
Wind (km/h)
15
SSW
20
SSW
15
WSW
5
SW
0
WSW
10
WSW
5
SSW
15
SSW
10
WSW
5
SSW
10
S
5
WSW
5
SE
10
SE
5
ESE
20
ESE
20
SE
25
SE
30
SE
30
SE
30
SSE
Wind State
cross-on
cross-on
cross
cross-on
glassy
cross
cross-on
cross-on
cross
cross-on
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
11:35AM0.21m
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
thunderstorm
part cloud
part cloud
thunderstorm
thunderstorm
part cloud
thunderstorm
clear
clear
clear
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:31
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
1
3
2
1
2
14
11
9
24
12
29
37
Temp °C
31
31
27
30
29
26
31
30
27
30
29
27
30
30
27
27
27
27
27
27
27
Feels °C
33
33
31
35
35
32
34
33
31
33
33
32
32
33
33
30
30
29
28
28
28
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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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