Asakawa Surf Break

Asakawa Surf Forecast and Surf Report

Lat Long: 33.63° N 134.38° E

Issued: 2 pm 05 Jul 2026 (local time)

Forecast update in  hr  min

Today's Asakawa sea temperature is
24.5° C

1.1°C colder than average for this time of year

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


Asakawa surf forecast from 5 Jul 2026:

  • Best quality surf: Saturday 11 Jul, 12AM (local time) - 13ft (4.0m), 18s period, S swell with glassy winds.
  • Most powerful swell: Saturday 11 Jul, 12AM (local time) - 13ft (4.0m), 18s period, S swell with 10,307 kJ wave energy.
  • Next surfable swell (1★+): Monday 6 Jul, 6PM (local time) - 3.5ft (1.0m), 14s period with SE 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 Monday (Jul 06) at 6PM. The primary swell is predicted to be 1.0m and 14s period with a secondary swell of 0.2m and 7s. Another secondary swell of 0.7m and 6s 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 4.0m 18s and forecast to arrive on Saturday (Jul 11) at 12AM. Winds are predicted to be glassy at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.6m 3s period and expected on Tuesday (Jul 07) at 12AM.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+) 6PM (Mon 6th Jul)3.5ft (1.0m) 14s
Best Surf12AM (Sat 11th Jul)13ft (4.0m) 18s
Most Powerful12AM (Sat 11th Jul)13ft (4.0m) 18s

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


Updates in  hr  min  s Forecast update imminent

Alright, this is Rusty.

Let’s check the pulses up at Asakawa. We’ve got a quiet start, but the back end of this run has some serious muscle building. The water is sitting right around 76°, which is a bit cooler than usual for this time of year, so don’t get caught without a little extra rubber for that first dip.

The first couple of days are a total dud. Sunday the 5th is tiny, weak, and blown out with rain. Monday the 6th is hardly better with a cross-onshore breeze and no energy to work with. You’re looking at a solid gap of a few days where you can leave the board in the car.

We finally get a pulse on Tuesday morning the 7th. Swell bumps to about 4ft, but it’s cross-shore and has a very long period of 12 seconds. That’s classic groundswell, and on a point like Asakawa, that long-period juice can really draw some nice lines. The energy is moderate, but it’s still just a marginal call.

Now, hold tight. From Wednesday morning the 8th, the ocean wakes up. The swell jumps to 7ft with a 16-second interval, and the energy gets strong. It’s onshore, but the power is there. By Wednesday afternoon it’s 10ft and the energy is very strong. That’s getting into expert-only territory, as 10ft at Asakawa with that period will have some serious grunt.

Thursday the 9th holds that 10ft to 12ft range with a consistent 16-second period, but the wind turns cross-onshore, chopping the faces up a little. Still a major swell. Friday the 10th is the peak for raw size, with the swell hitting 13ft and the energy going completely bonkers. This is a massive, powerful groundswell. If you aren’t a hardcore expert, stay on dry sand.

The standout window, and the one I’d lock in, is Saturday morning, July 11th. The swell is still a solid 13ft, but the wind goes glassy – absolute perfection. The energy is still enormous. For the experts, this is going to be an all-timer session. Asakawa with a 13ft, 17-second groundswell and zero wind? That is the definition of a beast. It will be clean, terrifying, and incredible.

After Saturday, the swell fades quickly. Sunday the 12th is still a solid 8ft, but the wind turns and the energy drops. By Monday the 13th, it’s back down to a glassy 4ft in the morning, which could be a fun, easy session to finish the run. The rest of the second week falls apart into smaller, weaker swells and short periods; nothing worth chasing. The last few days are tiny and flat.

The one to go for: Saturday morning, July 11th. It’s the big wave call of the run. Clean, glassy, and massive.

Rusty.

Short Range Forecast

Moderate rain (total 19mm), heaviest on Sun afternoon. Warm (max 28°C on Mon morning, min 23°C on Mon night). Wind will be generally light.

Days 5-7 Weather Summary

Mostly dry. Warm (max 27°C on Thu afternoon, min 23°C on Wed night). Wind will be generally light.

Sun
5
Monday
6
Tuesday
7
Wednesday
8
Thursday
9
Friday
10
Saturday
11
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
Rating
(10 max)
0
0
0
1
2
1
2
3
3
4
5
3
4
6
5
6
8
7
4
5
3
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.4
SE
9
0.4
SSW
6
0.6
SE
15
0.9
SE
14
1.1
SE
13
1.1
SE
12
1.1
SE
16
2.1
SE
16
2.1
SE
16
3
SE
17
2.5
SSE
16
3
SSE
16
3
SSE
15
3.5
SSE
16
3.5
S
17
4
S
17
4
S
18
4
S
17
3.5
SSW
16
3
SSW
16
2.4
SSW
15
Wave Graph
Metric surfscale
Energy kJ
31
14
149
301
406
358
620
2035
1983
4826
3644
4430
4301
5644
6748
9174
10307
8560
6356
5020
2449
Wind (km/h)
10
S
0
NNE
15
SSW
5
SW
5
N
5
E
5
SSE
5
S
10
S
5
SSE
0
WSW
10
SE
10
SSE
0
SW
10
SE
10
SSE
5
SSW
5
SSE
10
S
0
NNE
5
SSW
Wind State
on
glassy
cross-on
cross
cross-off
cross
on
on
on
on
glassy
cross-on
on
glassy
cross-on
on
glassy
glassy
on
glassy
cross-on
High Tide
9:43PM1.63m
9:16AM1.51m
10:17PM1.62m
10:17AM1.42m
10:55PM1.60m
11:38AM1.36m
11:41PM1.58m
1:20PM1.35m
00:36AM1.58m
3:00PM1.43m
1:41AM1.60m
4:18PM1.55m
2:47AM1.65m
Low Tide
3:02PM0.38m
3:36AM0.81m
3:39PM0.51m
4:28AM0.75m
4:23PM0.66m
5:30AM0.68m
5:17PM0.83m
6:40AM0.57m
6:30PM0.98m
7:54AM0.44m
8:00PM1.08m
9:03AM0.28m
9:23PM1.10m
10:04AM0.12m
heavy rain
light rain
part cloud
thunderstorm
rain showers
part cloud
rain showers
part cloud
part cloud
clear
clear
clear
clear
part cloud
part cloud
part cloud
part cloud
part cloud
thunderstorm
mod rain
thunderstorm
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
4:56
4:58
4:58
4:58
4:58
5:00
5:00
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:15
7:15
7:15
7:15
7:15
7:15
7:15
7:14
 mm
11
2
4
1
1
2
6
2
Temp °C
24
24
28
28
25
27
26
24
26
26
24
26
27
23
26
26
24
27
27
25
26
Feels °C
28
29
30
32
30
31
30
28
29
29
28
28
29
27
29
29
28
32
31
30
29
Swell 1
Height (m)
Direction
Period (s)
0.6
SSW
6
0.4
SSW
6
0.6
SE
15
0.9
SE
14
1.1
SE
13
1.1
SE
12
1.1
SE
16
2.1
SE
16
2.1
SE
16
3
SE
17
2.5
SSE
16
3
SSE
16
3
SSE
15
3.5
SSE
16
3.5
S
17
4
S
17
4
S
18
4
S
17
3.5
SSW
16
3
SSW
16
2.4
SSW
15
Energy kJ
31
14
149
301
406
358
620
2035
1983
4826
3644
4430
4301
5644
6748
9174
10307
8560
6356
5020
2449
Swell 2
Height (m)
Direction
Period (s)
0.4
SE
9
0.4
ESE
4
0.4
SSW
6
0.3
E
7
0.8
SSW
6
0.8
SE
15
0.9
SE
12
0.7
SE
21
1.6
SSE
18
1.5
SSE
18
0.6
E
8
0.4
E
8
1.6
S
18
0.3
SE
12
0.1
SE
15
Energy kJ
20
6
13
8
47
280
195
445
1689
1377
51
22
1688
23
8
Swell 3
Height (m)
Direction
Period (s)
0.1
S
8
0.2
ESE
10
0.3
ESE
8
0.2
S
7
0.4
SE
18
0.4
SSW
6
0.7
E
8
0.3
E
8
Energy kJ
1
10
13
4
79
15
64
12
Wind waves
Height (m)
Direction
Period (s)
0.3
ESE
4
0.5
SE
4
0.5
S
6
0.6
N
3
0.5
N
4
1.3
E
8
1.4
E
8
1
E
7
1
E
6
1
E
9
0.9
ESE
5
1
E
8
1
E
9
1
E
9
Energy kJ
2
7
17
7
7
224
245
109
86
158
45
137
153
157
Nearest Offshore or Glassy
Rating
(10 max)
1
1
1
2
2
3
4
4
5
5
5
5
5
6
7
9
8
7
5
5
4
Distance (km)
43
43
11
2
0
22
11
11
11
19
0
19
19
0
19
11
0
0
19
0
14
Best forecast wave conditions in Shikoku
Rating
(10 max)
1
1
1
2
3
3
4
4
5
5
6
5
5
8
7
9
9
9
5
8
5
Best forecast wave conditions in Japan
Rating
(10 max)
1
1
1
2
3
3
4
4
5
5
6
5
5
8
7
9
9
9
5
8
5
Header Global
Rating
(10 max)
9
7
5
6
8
7
5
5
9
8
9
9
5
6
6
5
8
7
4
9
9
  • 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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