Asakawa Surf Break

Lat Long: 33.63° N 134.38° E

Asakawa Surf Forecast and Surf Report

Issued: 8 pm 31 Aug 2026 (local time)

Forecast update in  hr  min

Today's Asakawa sea temperature is
28.9°C
1.4° 

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


Asakawa surf forecast from 31 Aug 2026:

  • Best quality surf: Sunday 6 Sep, 9AM (local time) - 10ft (3.0m), 9s period, E swell with cross-offshore winds.
  • Most powerful swell: Monday 7 Sep, 6AM (local time) - 8ft (2.5m), 10s period, E swell with 1,490 kJ wave energy.
  • Next surfable swell (1★+): Tuesday 1 Sep, 6AM (local time) - 2ft (0.6m), 8s 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 Tuesday (Sep 01) at 6AM. The primary swell is predicted to be 0.6m and 8s period with a secondary swell of 0.3m and 14s. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Asakawa in the next 16 days are 2.5m 10s and forecast to arrive on Monday (Sep 07) at 6AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 4s period and expected on Thursday (Sep 03) at 9PM.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+) 6AM (Tue 1st Sep)2ft (0.6m) 8s
Best Surf 9AM (Sun 6th Sep)10ft (3.0m) 9s
Most Powerful 6AM (Mon 7th Sep)8ft (2.5m) 10s

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


The Lowdown

Alright, let me take a look at what’s going on with Asakawa. This is a point break that’s inconsistent and only really works with swell from the southeast. It’s a spot for intermediates, and you can expect company sometimes. The water temp is about average for this time of year, nothing out of the ordinary.

Right now, we’ve got a flat start. The first few days are basically a write-off. Tuesday the 1st and Wednesday the 2nd offer nothing rideable – small, onshore junk. Thursday the 3rd afternoon sees a little lift, with 1.3m from the SSE at 10 seconds and some cross-offshore wind, but it’s ordinary at best.

Friday the 4th is messy with heavy rain and moderate breeze. Not worth the drive.

Saturday the 5th is flat again. Then things get interesting.

Sunday the 6th morning is a standout. We get a solid 10ft easterly swell with cross-offshore wind and a combined energy of 1799 – that’s strong. The period is short at 9 seconds, so it’ll be a bit sectiony, but for experienced surfers, this is excellent. Afternoon drops off a bit.

Monday the 7th holds well: 6ft from the ESE, period stretching to 11 seconds, and clean conditions under a light breeze. Combined energy is 1044 – solid moderate. This is the kind of day where the point will start working nicely.

Tuesday the 8th afternoon is glassy – 4ft, period at 10 seconds, and the wind goes offshore and then glass. That’s as clean as it gets. A good one for a quiet session.

Wednesday the 9th morning brings another big pulse: 8ft at 12 seconds from the ESE, combined energy of 1868. That’s expert territory. The afternoon gets bigger at 8ft with a very long 14-second period. That long period will make the waves wrap well around the point, but it can also get a bit straight at times.

Thursday the 10th afternoon is the absolute standout of the whole outlook. 13ft from the ESE with a 14-second period and a combined energy of 6533 – that’s very strong, serious groundswell. Light offshore wind keeps it clean. This is for experienced surfers only. The morning is also huge at 12ft with a 15-second period, but the energy is lower. The afternoon is the pick.

After that, Friday the 11th still has some fun 6ft waves but the wind picks up. Saturday the 12th and Sunday the 13th see more big swell, but the wind turns cross or cross-on, and there’s risk of thunderstorms. The wave quality drops.

By Monday the 14th, it’s all onshore and messy, and from there into the end of the 16 days, it’s poor. The offshore wind disappears, and the swell gets sloppy.

Overall, the best on offer is Thursday the 10th afternoon at Asakawa – that’s a serious, clean groundswell. The runner-up is Sunday the 6th morning for a more manageable but still powerful session.

Rusty.

Short Range Forecast

Heavy rain (total 38mm), heaviest during Wed night. Warm (max 30°C on Tue morning, min 23°C on Thu afternoon). Wind will be generally light.

Days 5-7 Weather Summary

Heavy rain (total 214mm), heaviest during Fri afternoon. Warm (max 28°C on Sat afternoon, min 21°C on Fri night). Wind will be generally light.

Tuesday
1
Wednesday
2
Thursday
3
Friday
4
Saturday
5
Sunday
6
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
0
0
0
1
1
0
2
1
2
2
1
1
0
0
0
2
4
2
3
Swell
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
10
0.4
ESE
13
0.5
E
12
1
S
8
1.1
SSE
8
1.1
SSE
9
1.3
SSE
9
1.1
SSE
8
1.3
SSE
10
1.6
SSE
10
1.5
S
9
1.2
S
8
1.1
ESE
8
0.9
ESE
8
0.9
ESE
8
1.9
ESE
9
3
E
9
1.9
ESE
9
2.1
ESE
9
Wave Graph
Metric surfscale
Energy kJ
31
59
80
134
180
206
273
153
312
435
372
205
146
96
127
518
1204
606
755
Wind (km/h)
10
SW
5
SSE
10
SSE
5
S
10
E
10
SE
0
SE
5
N
15
N
15
NNE
20
NNE
20
NNE
25
NE
25
NNE
25
NNE
15
N
15
NNE
15
ENE
5
NNE
Wind State
cross
on
on
glassy
cross-on
on
glassy
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross
glassy
High Tide
8:07AM1.73m
8:03PM1.78m
8:53AM1.61m
8:30PM1.72m
9:51AM1.47m
9:02PM1.65m
11:18AM1.35m
9:43PM1.56m
1:51PM1.33m
11:00PM1.46m
3:35PM1.46m
1:17AM1.44m
Low Tide
1:53AM0.35m
2:01PM0.58m
2:31AM0.33m
2:32PM0.75m
3:16AM0.36m
3:06PM0.93m
4:13AM0.42m
3:51PM1.11m
5:37AM0.48m
5:35PM1.26m
7:28AM0.46m
8:34PM1.23m
clear
clear
clear
part cloud
thunderstorm
thunderstorm
thunderstorm
mod rain
mod rain
heavy rain
heavy rain
heavy rain
heavy rain
clear
clear
part cloud
rain showers
part cloud
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:35
5:35
5:37
5:37
5:37
5:39
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:30
6:29
6:28
6:25
6:24
6:23
6:22
 mm
1
4
14
9
10
38
57
51
67
1
Temp °C
27
30
30
26
29
29
26
24
24
24
24
23
22
27
28
24
27
28
25
Feels °C
32
33
33
31
32
33
31
28
27
27
26
24
22
25
27
25
28
29
27
  • 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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