Asakawa Surf Break

Asakawa Surf Forecast and Surf Report

Lat Long: 33.63° N 134.38° E

Issued: 2 pm 06 Jul 2026 (local time)

Forecast update in  hr  min

Today's Asakawa sea temperature is
24.6° C

1.2°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 6 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 10,480 kJ wave energy.
  • Next surfable swell (1★+): Tuesday 7 Jul, 12AM (local time) - 3.5ft (1.1m), 13s 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 Tuesday (Jul 07) at 12AM. The primary swell is predicted to be 1.1m and 13s period with a secondary swell of 0.5m and 6s. Another secondary swell of 0.6m and 7s 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 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 0.4m 3s period and expected on Tuesday (Jul 07) at 3AM.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+)12AM (Tue 7th Jul)3.5ft (1.1m) 13s
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, let’s get into it. The surf is gonna be a tale of two halves really. There's a slow start for the first couple of days with only small stuff around, then the ocean just wakes up from Wednesday onwards and we get a proper pulse of solid swell that hangs around for a while.

Monday afternoon the 6th kicks it off over at Asakawa. Glassy conditions with 3ft of swell out of the SE. The water sits at 76°, which is a bit colder than normal for this time of year – you’ll feel that difference, nothing crazy but you’ll notice it. That swell's carrying moderate energy (316) and the winds are dead still. It’s a small but clean start.

Tuesday morning the 7th looks better. Swell bumps up to 4ft from the ESE with a solid 12-second period, and the energy builds to 854. Glassy again. This is about as clean as it gets for a small wave. The inconsistency of the break is worth mentioning though – it doesn’t fire all the time, so don’t be surprised if you’re waiting a bit.

From Wednesday the 8th onwards, things ramp up drastically. The swell jumps to over 6ft and keeps climbing. The trade-off is the wind goes onshore, so the quality gets questionable. By Wednesday afternoon we’re looking at 8ft / 16-second SE groundswell but that onshore wind will mess with the face. Not ideal for a point break.

The standout window arrives Friday afternoon the 10th and Saturday the 11th. Friday afternoon we’ve got a thumping 13ft / 16-second S swell with massive energy at 11634. The wind is onshore but light – that actually might line up okay here. By Saturday morning we’re still holding at 13ft but now the period stretches to 17 seconds – that's a very long period groundswell, meaning deep ocean energy. This is too big for beginners (over 8ft is expert territory) and long-period swells like this can run a bit fast and straight over the sand, but at a point like Asakawa it could link up nicely.

Then Saturday afternoon the 11th – this is the moment. The swell eases slightly to 11ft from the SSW, period still at 16 seconds, and the wind goes glassy – dead flat. That’s excellent surf for experienced surfers. Clean, powerful, consistent lines. We’re talking 6278 units of energy, which is strong. This is your best bet across the whole run.

After Sunday it tails off steadily. By the middle of the second week (the 16th and 17th) we’re back to knee-high dribble with very ordinary conditions, but there’s a little uptick on Sunday the 19th afternoon – 8ft of ESE swell with light cross-onshore wind, and then Monday the 20th looks interesting too: 7ft from the ESE with glassy conditions in the afternoon. That’s a decent note to finish on, but the confidence is lower that far out.

Overall, the standout is Saturday afternoon the 11th. Don’t sleep on that.

Rusty.

Short Range Forecast

Light rain (total 8mm), mostly falling on Mon night. Warm (max 27°C on Mon afternoon, min 23°C on Mon night). Wind will be generally light.

Days 5-7 Weather Summary

Mostly dry. Warm (max 27°C on Sat morning, min 22°C on Thu night). Wind will be generally light.

Mon
6
Tuesday
7
Wednesday
8
Thursday
9
Friday
10
Saturday
11
Sunday
12
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
Rating
(10 max)
2
2
3
1
3
3
3
4
3
2
5
5
7
8
6
5
5
3
2
2
2
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)
0.9
SE
14
1.1
SE
13
1.2
ESE
12
1.2
SE
16
2.1
SE
16
2.1
SE
15
2.5
SE
16
2.5
SE
15
2.5
SSE
16
3
SSE
15
3
SSE
15
3.5
S
16
4
S
16
4
S
18
4
S
17
3.5
SSW
16
3
SSW
16
2.2
SSW
14
1.3
SSW
13
1.4
SSW
12
1.3
S
11
Wave Graph
Metric surfscale
Energy kJ
301
406
417
692
2009
1882
3555
2773
3560
3479
3592
6219
7620
10480
8661
6278
4181
1859
606
560
418
Wind (km/h)
5
ENE
5
N
5
E
10
SSE
5
SSE
10
SE
10
SSE
0
SW
10
SE
10
SSE
0
WNW
10
SE
10
SSE
5
SE
5
SSE
5
S
5
SSW
5
SSE
10
S
5
SW
5
SE
Wind State
glassy
cross-off
glassy
on
on
on
on
glassy
cross-on
on
glassy
cross-on
on
glassy
on
glassy
glassy
on
on
glassy
glassy
High Tide
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
5:16PM1.67m
3:49AM1.73m
Low Tide
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
10:28PM1.08m
10:59AM-0.01m
thunderstorm
rain showers
rain showers
rain showers
part cloud
part cloud
clear
part cloud
part cloud
clear
part cloud
part cloud
part cloud
part cloud
part cloud
cloud
part cloud
part cloud
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
4:58
4:58
4:58
4:58
5:00
5:00
5:01
<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
7:14
7:14
 mm
3
3
1
1
Temp °C
27
24
25
25
23
26
26
23
26
26
23
26
26
24
27
26
25
26
26
24
28
Feels °C
32
28
29
28
26
29
29
27
29
28
27
29
29
28
30
30
30
30
29
28
30
Swell 1
Height (m)
Direction
Period (s)
0.9
SE
14
1.1
SE
13
1.2
ESE
12
1.2
SE
16
2.1
SE
16
2.1
SE
15
2.5
SE
16
2.5
SE
15
2.5
SSE
16
3
SSE
15
3
SSE
15
3.5
S
16
4
S
16
4
S
18
4
S
17
3.5
SSW
16
3
SSW
16
2.2
SSW
14
1.3
SSW
13
1.4
SSW
12
1.3
S
11
Energy kJ
301
406
417
692
2009
1882
3555
2773
3560
3479
3592
6219
7620
10480
8661
6278
4181
1859
606
560
418
Swell 2
Height (m)
Direction
Period (s)
0.4
SSW
6
0.5
SSW
6
0.8
SE
15
1.2
ESE
8
0.6
SSE
20
1.3
SSE
18
1
SSE
19
0.5
E
8
0.6
E
8
1.2
S
18
1
S
21
2.5
SSW
18
0.3
SE
12
0.3
SE
12
1
S
12
0.4
SE
9
0.4
SE
10
Energy kJ
11
22
280
172
275
1042
772
36
50
942
908
3975
23
22
294
31
27
Swell 3
Height (m)
Direction
Period (s)
0.2
E
7
0.4
SE
18
0.4
SSW
6
0.9
SE
12
0.3
E
8
0.4
E
8
0.5
E
9
0.3
SE
12
0.2
E
10
0.4
SE
11
0.3
ESE
8
0.3
ESE
9
Energy kJ
4
79
16
224
12
22
39
23
7
40
14
17
Wind waves
Height (m)
Direction
Period (s)
0.6
E
7
1.3
E
6
1.2
E
7
1
E
6
0.8
ESE
5
0.6
E
5
1
E
8
0.7
E
8
0.8
E
9
Energy kJ
38
141
134
76
36
17
137
63
101
Nearest Offshore or Glassy
Rating
(10 max)
2
2
3
4
4
4
4
4
5
3
5
6
2
8
8
5
5
4
2
2
2
Distance (km)
0
0
0
19
11
19
19
0
19
475
0
19
444
0
19
0
0
14
11
0
0
Best forecast wave conditions in Shikoku
Rating
(10 max)
2
3
3
4
4
5
4
5
5
5
8
9
9
9
5
4
2
3
3
Best forecast wave conditions in Japan
Rating
(10 max)
2
3
3
4
4
5
4
5
6
3
5
8
4
9
9
9
5
4
4
3
3
Header Global
Rating
(10 max)
7
8
7
5
5
9
8
9
8
7
5
6
5
8
5
5
5
5
5
9
8
  • 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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