Asakawa Surf Break

Lat Long: 33.63° N 134.38° E

Asakawa Surf Forecast and Surf Report

Issued: 2 pm 12 Sep 2026 (local time)

Forecast update in  hr  min

Today's Asakawa sea temperature is
27.6°C
0.6° 

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


Asakawa surf forecast from 12 Sep 2026:

  • Best quality surf: Saturday 19 Sep, 6PM (local time) - 15ft (4.5m), 14s period, ESE swell with cross-offshore winds.
  • Most powerful swell: Saturday 19 Sep, 6PM (local time) - 15ft (4.5m), 14s period, ESE swell with 7,257 kJ wave energy.
  • Next surfable swell (1★+): Saturday 12 Sep, 6PM (local time) - 1.5ft (0.4m), 10s 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 Saturday (Sep 12) at 6PM. The primary swell is predicted to be 0.4m and 10s period with a secondary swell of 0.5m and 7s. Another secondary swell of 0.6m and 5s 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 4.5m 14s and forecast to arrive on Saturday (Sep 19) at 6PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 3s period and expected on Thursday (Sep 17) at 12PM.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+) 6PM (Sat 12th Sep)1.5ft (0.4m) 10s
Best Surf 6PM (Sat 19th Sep)15ft (4.5m) 14s
Most Powerful 6PM (Sat 19th Sep)15ft (4.5m) 14s

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


The Lowdown

Alright folks, Rusty here. Let's have a look at what Asakawa's got cookin' over the next couple weeks. It's a bit of a slow burner, so hang tight.

The first week is pretty quiet overall. We start with some small, weak conditions. On Saturday the 12th, the morning session is on offer with a tiny 2ft southerly swell, but it's clean with a light cross-offshore breeze. The energy is weak (102), so it's more of a longboard or foiling kind of day if you're keen. The water is a balmy 82°, which is about average for this time of year.

We then hit a real dry spell. From Saturday afternoon right through until the end of the following week, it's mostly small, weak, and messy. There are flashes of clean conditions with glassy mornings on Monday the 14th, Tuesday the 15th, and Wednesday the 16th, but the swell is tiny, barely pushing 3ft, and the energy is weak to moderate at best (around 100-200 range). It's surfable, but very ordinary. This stretch of nothing-special goes on for days.

Now, here’s where it gets interesting. A serious pulse of energy shows up for the true standouts. The real magic window looks to be from Saturday the 19th through Monday the 21st. This is where you want to point your car. On Saturday morning the 19th, we've got a solid 12ft swell from the ESE pumping in with a very long 15-second period. The wind is a clean cross-offshore from the NE. The combined energy is massive (4990). This is setup for experienced surfers only; that size at a point break like Asakawa will be a proper handful, but the potential for some freight-train rides is there. The afternoon gets bigger, up to 16ft, but the wind swings more cross-shore, making it a bit gnarlier.

Sunday the 20th still has solid muscle, with another 12ft swell from the SE and cross-off winds. Then Monday the 21st morning could be the pick, as a 12ft southerly groundswell meets a 12-second period and complete glass. Flat calm. If you can get out there before the wind and the afternoon storms, that session will be absolutely pumping, though still only for the experienced crew.

After that big push, it backs off quickly into the following week. Tuesday the 22nd morning is worth a late look, with 8ft surf and glassy conditions, good for a wider range of surfers. But then the wind turns onshore and it gets messy again. By the 23rd, it's blown out and tiny. There is a brief return of cleaner, glassy conditions on Thursday the 24th afternoon with a 6ft easterly swell, offering a possible fun end to the outlook, before it fades out to flat, clean conditions by the weekend.

So, to sum it up: the first ten days are a write-off. Your one true standout is the weekend of the 19th and 20th, and Monday the 21st morning. Aim for those days, bring your big-wave board, and stay out of the way if you’re not ready for it. This spot likes a solid SE groundswell, and when it lines up, there’s really nothing else like it.

*Rusty*

Short Range Forecast

Moderate rain (total 10mm), heaviest on Mon night. Warm (max 29°C on Sun morning, min 24°C on Sun night). Wind will be generally light.

Days 5-7 Weather Summary

Moderate rain (total 13mm), heaviest on Wed morning. Warm (max 28°C on Tue afternoon, min 23°C on Tue night). Wind will be generally light.

Sat
12
Sunday
13
Monday
14
Tuesday
15
Wednesday
16
Thursday
17
Friday
18
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
1
0
0
0
1
1
0
1
1
0
1
1
1
1
1
1
1
3
1
2
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.6
S
7
0.4
ESE
10
0.4
ESE
9
0.6
ESE
9
1
SE
9
1.1
SE
8
1
SE
8
1
SE
10
1.1
SE
9
1.1
SE
9
0.9
ESE
9
0.9
SE
9
0.9
ESE
9
0.8
ESE
9
0.7
SE
9
0.7
SE
9
1.3
ESE
8
2.3
E
8
1.6
ESE
9
1.8
ESE
9
Wave Graph
Metric surfscale
Energy kJ
34
35
32
54
145
149
142
181
203
190
138
115
121
96
75
75
186
703
405
471
Wind (km/h)
5
ESE
5
SE
5
S
10
SSE
5
S
0
S
15
S
5
WNW
5
SSW
10
S
5
W
5
E
5
ENE
5
N
15
NNE
15
NE
10
NNE
10
NE
5
E
0
N
Wind State
glassy
on
on
on
glassy
glassy
cross-on
cross-off
glassy
cross-on
glassy
glassy
glassy
off
cross-off
cross-off
cross-off
cross-off
cross
glassy
High Tide
6:37PM1.84m
6:54AM1.85m
7:00PM1.83m
7:31AM1.78m
7:22PM1.79m
8:09AM1.67m
7:43PM1.73m
8:48AM1.54m
8:04PM1.66m
9:32AM1.40m
8:24PM1.57m
10:38AM1.28m
8:45PM1.47m
Low Tide
00:43AM0.33m
12:57PM0.43m
1:15AM0.29m
1:24PM0.57m
1:46AM0.29m
1:50PM0.72m
2:19AM0.34m
2:13PM0.87m
2:54AM0.42m
2:34PM1.00m
3:36AM0.53m
2:53PM1.12m
thunderstorm
thunderstorm
thunderstorm
clear
thunderstorm
thunderstorm
part cloud
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
part cloud
thunderstorm
part cloud
part cloud
rain showers
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:43
5:43
5:45
5:45
5:46
5:47
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:14
6:13
6:10
6:09
6:07
6:07
6:06
 mm
1
3
1
1
1
2
1
2
2
3
3
1
2
1
Temp °C
27
25
29
28
25
28
29
25
28
28
25
26
25
24
28
27
24
26
27
24
Feels °C
32
30
32
31
30
31
31
28
31
31
29
30
29
28
29
29
26
28
30
27
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
Map placeholder
How to use the Wavefinder 
submit an eyeball surf report

Quick surf report for Asakawa:

join our community of surf reporters

FREE! Surf-Forecast.com widget for your website

The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Asakawa surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.


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.

Nearest locationNearest