Asakawa Surf Break

Lat Long: 33.63° N 134.38° E

Asakawa Surf Forecast and Surf Report

Issued: 2 pm 06 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 6 Aug 2026:

  • Best quality surf: Sunday 9 Aug, 12AM (local time) - 4.5ft (1.4m), 11s period, SSW swell with glassy winds.
  • Most powerful swell: Friday 7 Aug, 12AM (local time) - 16ft (5.0m), 14s period, SE swell with 8,450 kJ wave energy.
  • Next surfable swell (1★+): Sunday 9 Aug, 12AM (local time) - 4.5ft (1.4m), 11s 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 Sunday (Aug 09) at 12AM. The primary swell is predicted to be 1.4m and 11s period with a secondary swell of 1.5m 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 5.0m 14s and forecast to arrive on Friday (Aug 07) at 12AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.7m 3s period and expected on Wednesday (Aug 12) at 12AM.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+)12AM (Sun 9th Aug)4.5ft (1.4m) 11s
Best Surf12AM (Sun 9th Aug)4.5ft (1.4m) 11s
Most Powerful12AM (Fri 7th Aug)16ft (5.0m) 14s

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


The Lowdown

Alright, let’s get into it. The next couple of weeks are going to be a bit of a mixed bag for us at Asakawa. There’s a decent pulse of energy early on, but the wind is going to be the main character for the first few days, and not in a good way.

The first real window starts Thursday the 6th, but it’s more of a warning than a welcome. We’re looking at a solid 16.4ft SE swell, driven by an east wind at 15.5 mph. It’s cross-on and choppy, with plenty of energy but it’s going to be a battle. That’s more of a washing machine than a wave. We’ll see those conditions continue into Friday the 7th, with the swell dropping from 13.1ft down to 11.5ft through the day. The wind eases a bit to 12.4 mph, but it’s still cross-on and messy. Saturday the 8th, the swell drops to around 6.9ft in the morning and 5.9ft in the afternoon, but the wind is still on it, keeping things fairly choppy. It’s surfable, but you’ll be scratching for a clean one.

Now, here’s the light at the end of the tunnel. Sunday the 9th is our first real standout. The wind goes glassy, absolutely dead, in the morning with a light ESE breeze. The swell drops to a clean 3.3ft, but the period is a solid 13 seconds, direction ESE. The energy is moderate, but the conditions will be perfect. This is the cleanest, most inviting surf we’ll see in this run, even if it’s on the smaller side. That’s the one to get out for.

The early part of next week, Monday the 10th and Tuesday the 11th, is a bit of a lull. We’re looking at small, 3.3ft to 3.9ft swells, with light winds. Tuesday morning actually cleans up again with a bit of glass, so there might be a fun little wave for a log. But it’s not a headline. By Wednesday the 12th, the swell drops right off to 2.6ft. The morning is glassy, and the afternoon even has a bit of rain with glass. It’s small, but on the point, it could be playful.

From Thursday the 13th through Saturday the 15th, things get pretty desperate. The swell bottoms out, the winds go a bit cross, and we’re looking at surf in the 2.0ft to 2.6ft range. This is the real flat spell. A few days with almost nothing on offer. You might find a knee-high ripple, but it’s honestly not worth paddling out for.

We start to see a pulse of life around Sunday the 16th. It’s a bit of a weird one – the swell comes up to around 3.9ft to 4.3ft, but the period is a short 6 seconds. It’s going to be a bit bumpy and lack power. The afternoon on the 16th is glassy, so it might be rideable, but it’s not going to be pretty.

The new energy really starts to build from Monday the 17th. We see a jump to 5.6ft ESE, and while the period is only 10 seconds, it’s a sign of things to come. That morning is a bit onshore, but the energy is there.

Now, for the true standout of the second week, look to the morning of Tuesday the 18th. The swell builds to 6.9ft, the direction is ESE, and the wind goes completely glassy. The period is a short 7 seconds, so it’ll be a bit crumbly and not have that real push, but it’s head-high and clean. For Asakawa, that’s a classic morning. That’s the one to mark in the diary. The following week, the 19th and 20th, looks promising too, with 5.2ft to 6.2ft ESE swell and light, clean winds, especially the afternoon of the 20th. These are looking like the best days of the run, but being that far out, we’ll keep our fingers crossed.

So to sum it up: if you can get out Sunday the 9th for the clean, small waves, do it. Otherwise, the Tuesday the 18th morning is shaping up to be the biggest and cleanest of the run. The water is running about 2.2° warmer than usual, so a touch on the tropical side. Get on it.

Short Range Forecast

Heavy rain (total 48mm), heaviest during Fri night. Warm (max 30°C on Thu afternoon, min 25°C on Sat night). Wind will be generally light.

Days 5-7 Weather Summary

Some drizzle, heaviest during Mon night. Warm (max 30°C on Tue morning, min 25°C on Tue night). Wind will be generally light.

Thu
6
Friday
7
Saturday
8
Sunday
9
Monday
10
Tuesday
11
Wednesday
12
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
0
8
2
1
2
2
2
3
3
2
3
1
1
2
2
1
2
2
2
1
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
5
SE
15
5
SE
14
4
SSE
13
3.5
SSE
12
2.5
S
12
2.1
S
12
1.8
SSW
12
1.4
SSW
11
1.1
SW
12
1
E
13
1.4
S
11
1.1
S
10
1
S
10
1.1
S
10
1.2
S
11
1.2
SSW
11
1
SSW
12
0.8
S
11
0.8
S
10
0.7
S
10
Wave Graph
Metric surfscale
Energy kJ
9797
8450
4635
3568
1857
1269
828
439
367
339
457
239
206
265
351
370
288
143
127
92
Wind (km/h)
25
E
15
ENE
20
E
20
ESE
15
ESE
15
E
15
SE
5
SE
5
ESE
10
SE
0
SE
10
SE
10
SSE
5
W
5
NNE
10
SSW
10
N
5
NE
5
SE
10
N
Wind State
cross-on
cross
cross-on
cross-on
cross-on
cross-on
on
glassy
glassy
on
glassy
cross-on
on
glassy
glassy
cross-on
off
glassy
glassy
cross-off
High Tide
10:35PM1.58m
1:18PM1.32m
11:38PM1.53m
3:21PM1.41m
1:11AM1.52m
4:29PM1.55m
2:42AM1.58m
5:14PM1.67m
3:52AM1.69m
5:51PM1.75m
4:49AM1.80m
6:24PM1.81m
Low Tide
4:27PM0.97m
6:00AM0.50m
5:43PM1.14m
7:33AM0.43m
7:55PM1.22m
8:57AM0.31m
9:34PM1.16m
10:02AM0.17m
10:33PM1.05m
10:55AM0.05m
11:18PM0.92m
11:39AM-0.00m
11:58PM0.78m
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
clear
part cloud
part cloud
part cloud
part cloud
cloud
part cloud
light rain
part cloud
clear
clear
part cloud
rain showers
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:18
5:18
5:18
5:20
5:20
5:20
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:59
6:58
6:57
6:55
6:54
6:53
6:52
 mm
2
8
6
8
21
3
1
2
Temp °C
30
27
27
28
26
28
29
26
29
29
26
29
29
26
30
30
27
29
29
26
Feels °C
31
31
30
31
29
31
31
31
33
32
31
32
31
30
34
34
31
32
33
29
  • Map Icons:
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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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