Asakawa Surf Break

Lat Long: 33.63° N 134.38° E

Asakawa Surf Forecast and Surf Report

Issued: 8 pm 10 Aug 2026 (local time)

Forecast update in  hr  min

Today's Asakawa sea temperature is
28.6° 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 10 Aug 2026:

  • Best quality surf: Tuesday 11 Aug, 3AM (local time) - 3.5ft (1.0m), 11s period, S swell with cross-offshore winds.
  • Most powerful swell: Monday 17 Aug, 12PM (local time) - 4ft (1.2m), 10s period, E swell with 262 kJ wave energy.
  • Next surfable swell (1★+): Tuesday 11 Aug, 3AM (local time) - 3.5ft (1.0m), 11s 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 Tuesday (Aug 11) at 3AM. The primary swell is predicted to be 1.0m and 11s period with a secondary swell of 0.5m and 12s. 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 1.2m 10s and forecast to arrive on Monday (Aug 17) at 12PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.0m 5s period and expected on Tuesday (Aug 11) at 3PM.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+) 3AM (Tue 11th Aug)3.5ft (1.0m) 11s
Best Surf 3AM (Tue 11th Aug)3.5ft (1.0m) 11s
Most Powerful12PM (Mon 17th Aug)4ft (1.2m) 10s

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


The Lowdown

G’day, Rusty here. Let’s have a yarn about Asakawa. It’s been a bit quiet, but there’s a couple of windows that’ll get the stoke going.

The surf kicks off on Tuesday 11th August. Tuesday morning you’ve got 3ft of south swell wrapping in, with a 10-second period and a decent 307 of energy pushing through. The wind is NNE at 9 mph, so it’s cross-off and the waves will be clean. That’s your best bet for the first week. It’s a point break and it’s inconsistent, so don’t expect a set every minute, but when they come, they’ll be worth the wait. Crowds are possible here sometimes, so keep an eye out. Tuesday afternoon drops a touch to 3ft, still clean, but the energy dips a bit.

From Wednesday 12th through to Monday 18th August, it’s mostly ordinary. The swell hangs around 2ft to 3ft, but the wind swings onshore or cross-onshore and the quality goes down the drain. There are a few glassy windows on Saturday 15th morning and again on Monday 17th morning, with 2ft swell and clean conditions, but the energy is weak — only around 160 to 172. You could get a few fun ones, but it’s nothing to write home about.

There’s a little gap of quiet, then Thursday 20th August sees a jump in size — 5ft from the SSE with 9-second period and energy hitting 400. But the wind is cross-onshore and the surf is messy, so it’s marginal at best.

Now here’s where it gets interesting. Friday 21st August morning delivers the standout of the whole outlook. You’ve got 4ft of south swell, 9-second period, and 270 of energy. The wind is glassy — absolute zero — from the ESE at 3 mph. That’s clean conditions, and for Asakawa, that’s the pick. The waves will be clean and the point will hold that south swell nicely.

After that, Saturday 22nd morning has glassy conditions again with 3ft of south swell, and Tuesday 25th August morning brings a bigger, long-period pulse: 4ft from the SE with a 13-second period and 693 of energy. It’s a bit cross-onshore, so not pristine, but there’s power there. By Wednesday 26th August morning, it cleans right up again — glassy winds and 4ft of ESE swell at 11 seconds, 473 of energy. That’s another ripper session to look forward to.

Overall, the best on offer is Friday 21st August morning with clean 4ft south swell. The second standout is Wednesday 26th August morning with glassy conditions and solid energy. The water temperature is about average for this time of year, no big anomaly to note.

Stay keen, and get out there when it’s clean. Asakawa doesn’t fire often, but when it does, it’s a gem.

Rusty.

Short Range Forecast

Moderate rain (total 15mm), heaviest on Thu morning. Warm (max 30°C on Tue morning, min 23°C on Mon night). Wind will be generally light.

Days 5-7 Weather Summary

Light rain (total 4mm), mostly falling on Thu night. Warm (max 30°C on Sat afternoon, min 23°C on Thu night). Wind will be generally light.

Tuesday
11
Wednesday
12
Thursday
13
Friday
14
Saturday
15
Sunday
16
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
2
2
1
1
0
0
1
0
0
1
0
0
1
1
0
1
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)
1
S
10
1
S
10
0.9
SSW
10
0.9
SSW
10
0.7
SSW
10
0.7
S
10
0.8
SSW
10
0.7
SSW
9
0.7
SSW
9
0.7
S
9
0.7
S
9
0.6
S
9
0.7
S
8
0.7
S
10
0.7
S
9
0.8
S
10
0.7
S
9
0.6
S
9
1
ESE
6
Wave Graph
Metric surfscale
Energy kJ
216
216
173
173
92
87
125
88
86
81
78
56
71
90
83
122
81
59
58
Wind (km/h)
15
N
15
NNE
15
NNE
10
NW
5
E
10
SE
0
ENE
10
E
10
SSE
5
W
5
SSE
10
SSE
5
W
5
E
10
SSE
5
W
5
SSE
10
S
5
WNW
Wind State
cross-off
cross-off
cross-off
off
cross-on
on
glassy
cross-on
on
glassy
on
on
glassy
glassy
on
glassy
on
cross-on
glassy
High Tide
3:52AM1.69m
5:51PM1.75m
4:49AM1.80m
6:24PM1.81m
5:39AM1.88m
6:54PM1.83m
6:24AM1.90m
7:22PM1.83m
7:07AM1.87m
7:49PM1.81m
7:49AM1.78m
8:14PM1.77m
Low Tide
10:33PM1.05m
10:55AM0.05m
11:18PM0.92m
11:39AM-0.00m
11:58PM0.78m
12:20PM0.01m
00:35AM0.66m
12:56PM0.09m
1:12AM0.56m
1:30PM0.22m
1:48AM0.49m
2:00PM0.39m
2:24AM0.47m
clear
clear
clear
part cloud
rain showers
rain showers
rain showers
thunderstorm
thunderstorm
thunderstorm
clear
thunderstorm
clear
clear
clear
clear
clear
thunderstorm
rain showers
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:20
5:20
5:22
5:22
5:22
5:24
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:54
6:53
6:52
6:52
6:51
6:49
6:47
 mm
1
2
6
5
1
1
1
2
1
Temp °C
27
30
30
25
27
27
24
27
28
24
28
28
25
29
30
25
30
29
26
Feels °C
30
29
30
27
29
29
28
30
30
27
30
30
29
31
32
28
33
32
30
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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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