Asakawa Surf Break

Lat Long: 33.63° N 134.38° E

Asakawa Surf Forecast and Surf Report

Issued: 8 am 10 Jul 2026 (local time)

Forecast update in  hr  min

Today's Asakawa sea temperature is
24.7° C
1.5° 

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


Asakawa surf forecast from 10 Jul 2026:

  • Best quality surf: Saturday 11 Jul, 6AM (local time) - 13ft (4.0m), 17s period, S swell with glassy winds.
  • Most powerful swell: Saturday 11 Jul, 6AM (local time) - 13ft (4.0m), 17s period, S swell with 8,927 kJ wave energy.
  • Next surfable swell (1★+): Saturday 11 Jul, 12AM (local time) - 13ft (4.0m), 17s 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 (Jul 11) at 12AM. The primary swell is predicted to be 4.0m and 17s period. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Asakawa in the next 16 days are 4.0m 17s and forecast to arrive on Saturday (Jul 11) at 6AM. Winds are predicted to be glassy at the time the swell arrives.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+)12AM (Sat 11th Jul)13ft (4.0m) 17s
Best Surf 6AM (Sat 11th Jul)13ft (4.0m) 17s
Most Powerful 6AM (Sat 11th Jul)13ft (4.0m) 17s

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


Alright, crew, Rusty here, pullin' up a chair for the next couple of weeks. It's a bit of a wild ride, with a huge pulse of swell that's gonna have a lot of wind on it before we get a clean window.

The ocean's running a bit cooler than it should be for July, around 77°F, which is about 3°F colder than usual. Not a dealbreaker, but a wetsuit top might be nice for the early sessions.

The first real shot of surf comes Friday, July 10th. A massive 12ft groundswell from the south, with a 17-second period, is pumping in – the energy is off the charts. But the wind is blowing straight onshore at 5 mph. It's gonna be a big, messy, blown-out wall of water. For experts only, and even then, it's a tough ask.

Friday afternoon, the swell stays fat at 12ft, but the onshore wind picks up to 9 mph. No good. Saturday the 11th, we're looking at a 13ft south swell, but the wind is still onshore all day. This is massive, powerful, and ugly. It's the kind of setup that's more interesting for kite surfing than paddle surfing.

Now, here's the moment we've been waiting for. Sunday morning, July 12th. The swell drops to a still-burly 10ft from the SSW, with a 16-second period, and the energy is still very strong. But the wind goes dead calm, glassy. A 5 mph breeze from the south that's barely a breath. For a point break like Asakawa, which faces the south swell, this is a dream scenario. The conditions are "excellent for experienced surfers," and I'm calling it. This is the standout of the whole forecast. The wave face will be clean, powerful, and organized. The crowd is listed as "sometimes," so you might have a few others, but it's the session to be in. The afternoon goes south with a cross-onshore wind and a risk of thunderstorms, so it's a dawn patrol.

Sunday is the peak. Monday the 13th still has a clean 5ft wave from the SSW in the morning with glassy conditions, but it's a lot smaller. The energy is moderate. A fun, smaller option for intermediates.

From Tuesday the 14th right through to the 22nd of July, it's a long, flat spell. The swell drops to under 2 feet, the periods get short, and the energy is weak. A few glassy mornings, but the swell is just too small to bother.

Then, a flicker of hope. Thursday afternoon, July 23rd. The swell builds to 4ft from the ESE with a 12-second period (long period groundswell). The energy is moderate, and the wind is glassy. The forecast says "very good surf conditions." This is a promising, long-range standout but less certain. For a point break, that direction and glassy wind could produce some fun, clean waves. Mark it.

The final days, Friday the 24th and Saturday the 25th, show some small, clean waves in the mornings, but nothing special.

So here's the bottom line: This Sunday morning, July 12th, is the big one. Big, clean, glassy groundswell at Asakawa. The rest of the forecast is mostly flat or blown out, with a possible long-range glimmer on the 23rd.

Rusty, signing off.

Short Range Forecast

Moderate rain (total 11mm), heaviest on Sun night. Warm (max 30°C on Sun afternoon, min 23°C on Fri night). Wind will be generally light.

Days 4-6 Weather Summary

Light rain (total 6mm), mostly falling on Mon afternoon. Warm (max 30°C on Tue morning, min 24°C on Wed night). Wind will be generally light.

Friday
10
Saturday
11
Sunday
12
Monday
13
Tuesday
14
Wednesday
15
Thursday
16
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
5
4
6
6
5
6
5
3
3
3
1
2
0
0
1
0
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)
3.5
S
17
3.5
S
16
4
S
17
4
S
17
4
SSW
17
4
SSW
17
3
SSW
16
2.5
SSW
14
1.9
SSW
12
1.6
SSW
12
1.5
SSW
11
1.2
SSW
11
1
S
10
0.9
SSW
10
0.7
SSW
9
0.6
SSW
9
0.6
SSW
9
0.5
SSW
8
0.4
ESE
9
0.4
ESE
9
0.7
ESE
10
Wave Graph
Metric surfscale
Energy kJ
6964
7220
7851
8486
8345
8344
4833
2724
1069
658
521
350
204
160
88
64
62
39
28
28
80
Wind (km/h)
5
S
15
S
5
SW
10
SSE
10
S
10
WSW
5
S
10
SSW
5
WSW
5
WSW
5
E
5
NNW
5
ENE
10
SE
5
S
10
SSE
10
SSE
0
SW
10
SE
10
SSE
5
W
Wind State
on
on
glassy
on
on
cross
glassy
cross-on
glassy
glassy
cross
off
cross
on
glassy
on
on
glassy
cross-on
on
cross-off
High Tide
3:00PM1.43m
1:41AM1.60m
4:18PM1.55m
2:47AM1.65m
5:16PM1.67m
3:49AM1.73m
6:04PM1.75m
4:46AM1.81m
6:47PM1.80m
5:39AM1.86m
7:26PM1.81m
6:28AM1.88m
8:02PM1.79m
Low Tide
8:00PM1.08m
9:03AM0.28m
9:23PM1.10m
10:04AM0.12m
10:28PM1.08m
10:59AM-0.01m
11:22PM1.02m
11:49AM-0.08m
00:08AM0.95m
12:35PM-0.09m
00:52AM0.87m
1:18PM-0.04m
1:35AM0.79m
clear
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part cloud
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part cloud
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thunderstorm
mod rain
rain showers
thunderstorm
clear
part cloud
thunderstorm
part cloud
part cloud
clear
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
4:58
5:00
5:00
5:01
5:01
5:01
5:03
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:15
7:15
7:14
7:14
7:14
7:13
7:13
 mm
2
9
1
4
1
Temp °C
28
27
25
28
28
25
29
30
25
29
29
26
30
28
26
28
28
25
28
28
25
Feels °C
31
29
29
31
31
29
33
34
30
34
34
31
34
32
31
32
31
30
31
31
29
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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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