Aoshima Surf Break

Lat Long: 31.81° N 131.47° E

Aoshima Surf Forecast and Surf Report

Issued: 8 pm 11 Sep 2026 (local time)

Forecast update in  hr  min

Today's Aoshima sea temperature is
27.9°C
0.0° 

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


Aoshima surf forecast from 11 Sep 2026:

  • Best quality surf: Sunday 13 Sep, 9PM (local time) - 2ft (0.6m), 13s period, E swell with glassy winds.
  • Most powerful swell: Saturday 19 Sep, 3AM (local time) - 8ft (2.4m), 17s period, ESE swell with 3,164 kJ wave energy.
  • Next surfable swell (1★+): Sunday 13 Sep, 9PM (local time) - 2ft (0.6m), 13s period with E swell.

Best Forecast Surf Conditions for Aoshima this week:

The surf forecast for Aoshima over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Sunday (Sep 13) at 9PM. The primary swell is predicted to be 0.6m and 13s period with a secondary swell of 0.8m and 9s. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Aoshima in the next 16 days are 2.4m 17s and forecast to arrive on Saturday (Sep 19) at 3AM. Winds are predicted to be onshore at the time the swell arrives.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+) 9PM (Sun 13th Sep)2ft (0.6m) 13s
Best Surf 9PM (Sun 13th Sep)2ft (0.6m) 13s
Most Powerful 3AM (Sat 19th Sep)8ft (2.4m) 17s

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


The Lowdown

Alright, Rusty here again, but in feet and miles. Let’s look at Aoshima.

The next couple weeks are a tough slog. We’ve got a long stretch of poor conditions kicking off now, running through the first ten days or so, with only a few marginal moments. The real action doesn’t show up until the tail end of the period, so you’ve gotta be patient.

Water temp is about average for the time of year. The combined swell energy is weak to moderate, mostly in the low hundreds, so not much power around.

First real recommendation doesn’t come until Sunday the 13th of September. Sunday morning at Aoshima, we’ve got a small 3ft swell from the ESE with a 9-second period. Light cross-onshore wind keeps it a bit messy, and the energy is weak at 267. It’s marginal, maybe a few knee-high runners if you’re desperate. The break is fairly consistent, but it’s a reef, so watch your feet.

The whole next week is poor. Monday the 14th through Friday the 18th all show onshore wind and short-period windswell. Swell bumps to around 4ft by Tuesday the 15th, but the quality is gone. Combined energy hits the low 300s, but it’s not worth paddling out.

Then things get big. Friday the 18th afternoon brings a long-period groundswell of 4ft at 18 seconds, but the wind is onshore at 15 mph, and the energy jumps to 1630. By Saturday the 19th, it’s a massive 15ft swell from the ESE with a 17-second period and energy over 10,000. That’s huge, powerful, and dangerous. With onshore winds at 22 mph and storms around, this is expert-only. The reef would be handling a ton of water, but it’s more of a kite-surfing setup than a paddle session.

The big swell sticks around through the 20th and 21st, with 10ft to 16ft and strong, messy winds. Then on Tuesday the 22nd, the wind swings cross-off from the SSW at 37 mph in the afternoon, which would clean it up, but the swell is still 16ft from the south. Forecast says it’s too big for this break. Stay out of the water.

Here’s the one good window. After the chaos, on Wednesday the 23rd of September, the morning turns glassy. Wind is offshore from the E at just 3 mph, and the swell drops to a tiny 2ft from the ESE, but with a very long 16-second period. Energy is weak at 183, but glassy conditions on a reef with long-period groundswell could give you a few clean, shoulder-high set waves. It’s the best of a bad run.

Thursday the 24th and Friday the 25th show some improvement. Friday morning the 25th is the real standout. You’ve got 8ft of ESE groundswell at 16 seconds, with light cross-onshore wind. The combined energy is over 3000, which is moderate to strong. The forecast gives it the highest score of the whole run. That’s head-high plus with long, powerful lines. The long period is best for this reef, but crowds are possible. This is your window.

But don’t plan the whole week around it. Friday afternoon the wind goes onshore, and Saturday the 26th is lumpy and messy with 12ft surf. Sunday the 27th is the same.

So, summary: The first ten days are a write-off. The standout is Friday morning, September 25th, at Aoshima (Japan). It’s the only time where swell size, period, and light wind all come together for a good session. There’s also a tiny, glassy window on the 23rd for the small stuff. Long-range, so it’s promising but not locked in.

Rusty.

Short Range Forecast

Some drizzle, heaviest during Sun morning. Warm (max 27°C on Sun morning, min 25°C on Fri night). Wind will be generally light.

Days 5-7 Weather Summary

Heavy rain (total 24mm), heaviest during Wed morning. Warm (max 26°C on Mon night, min 23°C on Wed afternoon). Wind will be generally light.

Saturday
12
Sunday
13
Monday
14
Tuesday
15
Wednesday
16
Thursday
17
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
2
0
0
0
1
0
1
0
1
2
1
1
1
0
1
1
0
0
0
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
14
0.5
E
14
0.5
E
14
0.6
E
14
0.8
ESE
14
0.6
E
13
0.9
ESE
9
1.1
ESE
8
1.1
ESE
8
1.1
ESE
9
1.2
ESE
9
1.3
ESE
9
1.1
ESE
9
1
E
9
1
ESE
9
1.2
E
9
0.9
ESE
9
0.9
ESE
9
1.3
E
8
Wave Graph
Metric surfscale
Energy kJ
97
99
96
134
250
128
126
160
160
180
227
266
211
165
173
225
108
106
207
Wind (km/h)
5
NE
10
NE
10
ENE
10
N
10
NNE
10
E
5
NE
10
N
10
ESE
5
WNW
10
NNE
5
SE
10
N
10
NE
5
NE
10
NNE
15
NNE
15
NE
15
NNE
Wind State
glassy
cross-on
on
cross
cross-on
cross-on
cross-on
cross-on
cross-on
glassy
cross-on
cross-on
cross
cross-on
cross-on
cross-on
cross-on
on
cross-on
High Tide
6:16AM2.24m
6:41PM2.19m
6:53AM2.24m
7:04PM2.19m
7:30AM2.19m
7:29PM2.17m
8:10AM2.10m
7:54PM2.12m
8:53AM1.96m
8:20PM2.06m
9:44AM1.80m
8:48PM1.96m
Low Tide
00:14AM0.61m
12:30PM0.40m
00:44AM0.49m
1:01PM0.50m
1:16AM0.41m
1:30PM0.64m
1:49AM0.37m
1:59PM0.81m
2:26AM0.39m
2:29PM0.98m
3:06AM0.45m
3:00PM1.17m
part cloud
clear
clear
clear
thunderstorm
clear
clear
clear
part cloud
thunderstorm
thunderstorm
thunderstorm
thunderstorm
mod rain
thunderstorm
cloud
thunderstorm
part cloud
thunderstorm
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:54
5:56
5:56
5:56
5:58
5:58
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:25
6:24
6:22
6:22
6:21
6:20
6:17
 mm
1
2
1
2
4
7
7
1
4
Temp °C
25
26
26
26
27
27
26
27
27
26
26
26
25
24
23
24
25
26
25
Feels °C
29
29
29
31
31
30
31
31
30
30
30
30
29
27
27
27
26
28
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 Aoshima Surf forecast

The above surf forecast table for Aoshima provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Aoshima can be found by selecting the local surf guide option on the grey menu. Our Aoshima 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 (Aoshima) 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 Aoshima 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.

Aoshima is 14 km (9 miles) from Miyazaki-shi. If you plan a holiday in Kyu Shu, look for hotels and other accommodation in Miyazaki-shi. Miyazaki-shi has rooms for a wide range of budgets as well as car hire and transport links.

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