Asakawa Surf Break

Lat Long: 33.63° N 134.38° E

Asakawa Surf Forecast and Surf Report

Issued: 2 pm 01 Sep 2026 (local time)

Forecast update in  hr  min

Today's Asakawa sea temperature is
29.0°C
1.5° 

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


Asakawa surf forecast from 1 Sep 2026:

  • Best quality surf: Tuesday 8 Sep, 6AM (local time) - 15ft (4.5m), 11s period, SE swell with offshore winds.
  • Most powerful swell: Tuesday 8 Sep, 6AM (local time) - 15ft (4.5m), 11s period, SE swell with 4,595 kJ wave energy.
  • Next surfable swell (1★+): Wednesday 2 Sep, 12AM (local time) - 3ft (0.9m), 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 Wednesday (Sep 02) at 12AM. The primary swell is predicted to be 0.9m and 8s period with a secondary swell of 0.5m and 12s. 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 11s and forecast to arrive on Tuesday (Sep 08) at 6AM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.1m 5s period and expected on Friday (Sep 04) at 9PM.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+)12AM (Wed 2nd Sep)3ft (0.9m) 8s
Best Surf 6AM (Tue 8th Sep)15ft (4.5m) 11s
Most Powerful 6AM (Tue 8th Sep)15ft (4.5m) 11s

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


The Lowdown

Alright, Rusty here, checkin' in with the local scoop for Asakawa.

First up, the water is a touch warmer than normal for this time of year, coming in at 84°. That’s a nice little bonus for the sessions ahead.

Alright, let's be real. The next week is a bit of a grind for any dedicated surfer. We’ve got a few days that are surfable, but nothing to write home about until things really kick off. The first few days from Tuesday the 1st to the 7th are mostly small, messy, or plagued by iffy conditions. There's a pulse on Thursday the 3rd afternoon with a 5ft SSE swell, light offshore winds, and a combined energy of 419 (moderate), giving us some clean but average waves. Not a standout, but a session to get wet.

The real deal, the one you’ve been waiting for, arrives on Tuesday the 8th of September. That’s the day. Asakawa is a point break, and it’s going to absolutely fire. We’re looking at a solid 15ft groundswell from the SE, with a period of 11 seconds, and it’s gonna be glassy clean with light offshore winds from the NNW. The combined energy is a massive 4393 (very strong energy). This is big, powerful, and clean. It’s an expert-only zone at that size, but for the crew that can handle it, it’s gonna be epic. The swell direction is straight out of the SE, which is exactly what this point likes to see. Just keep in mind this break is inconsistent, so you’ll need to be patient, but the sets that come through will be worth the wait.

The days following that, Wednesday the 9th through Friday the 11th, are still pumping with big swell (11ft to 13ft), but the winds get messy, turning cross-shore and then onshore. It’s still big, with combined energy readings in the thousands (strong to very strong), but the quality drops off a cliff. It’s going to be a washing machine out there, and honestly, it might be more interesting for kite surfers than paddle surfers.

Then we get a second wind on Saturday the 12th of September. The swell drops to a much more manageable 8ft from the SE, with a period of 11 seconds. The wind goes glassy, absolutely dead calm. The combined energy is still a solid 1302 (strong). This is the pick for the intermediate crew. It’s clean, it’s powerful, and it’s perfect. Expect a bit of a crowd here, as the word will be out.

The surf tails off after that, dropping back to 3ft to 6ft through the rest of the second week. There are a few glassy windows on the 14th and 15th with clean lines, but it’s nothing compared to that big pulse.

So, to sum it up: for the big dogs, Tuesday the 8th of September is your stand-out. For the rest of us, Saturday the 12th of September is the session to circle on the calendar. The rest of the time, you’re picking through scraps.

Rusty.

Short Range Forecast

Heavy rain (total 84mm), heaviest during Thu morning. Warm (max 30°C on Tue afternoon, min 23°C on Thu morning). Wind will be generally light.

Days 5-7 Weather Summary

Heavy rain (total 127mm), heaviest during Fri night. Warm (max 28°C on Sat afternoon, min 21°C on Fri night). Mainly fresh winds.

Tue
1
Wednesday
2
Thursday
3
Friday
4
Saturday
5
Sunday
6
Monday
7
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
0
1
1
1
1
1
2
3
1
2
1
2
0
2
1
2
4
1
1
4
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.5
E
12
0.9
S
8
1.1
SSE
9
1.1
SSE
9
1
S
8
1.2
SSE
8
1.4
SSE
10
2.1
SSE
10
1.9
SSE
9
1.7
SSE
9
1.3
ESE
8
1.1
SSW
10
1.4
ESE
8
1.9
ESE
9
2
ESE
8
2
ESE
9
3.5
E
10
2.1
ESE
8
2.2
ESE
9
3.5
SE
11
Wave Graph
Metric surfscale
Energy kJ
80
105
189
206
147
185
370
838
606
474
186
214
256
530
549
560
2309
636
777
3250
Wind (km/h)
10
SSE
0
W
10
E
5
SE
5
ESE
10
NW
10
N
10
NNE
15
NNE
20
N
15
NE
20
N
25
NNE
15
NNE
15
NNE
15
NE
15
NNE
25
NNE
30
N
10
NW
Wind State
on
glassy
cross-on
on
glassy
off
cross-off
cross-off
cross-off
cross-off
cross-off
off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
off
High Tide
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
4:19PM1.58m
2:54AM1.54m
Low Tide
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
8:55AM0.35m
9:45PM1.08m
clear
rain showers
thunderstorm
thunderstorm
thunderstorm
heavy rain
heavy rain
mod rain
light rain
heavy rain
heavy rain
rain showers
clear
part cloud
part cloud
cloud
mod rain
light rain
part cloud
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:35
5:37
5:37
5:37
5:39
5:39
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:29
6:28
6:25
6:24
6:23
6:22
6:21
 mm
1
4
2
17
29
19
8
4
31
82
2
8
4
Temp °C
30
26
28
29
26
23
24
24
25
24
23
27
28
24
26
27
25
24
25
24
Feels °C
33
31
32
33
31
26
27
27
27
25
23
23
27
24
26
28
26
24
24
25
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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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