Aoshima Surf Break

Lat Long: 31.81° N 131.47° E

Aoshima Surf Forecast and Surf Report

Issued: 8 am 11 Sep 2026 (local time)

Forecast update in  hr  min

Today's Aoshima sea temperature is
28.0°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: Tuesday 15 Sep, 12AM (local time) - 4ft (1.2m), 9s period, ESE swell with cross-offshore winds.
  • Most powerful swell: Friday 18 Sep, 3PM (local time) - 4.5ft (1.4m), 17s period, ESE swell with 1,162 kJ wave energy.
  • Next surfable swell (1★+): Tuesday 15 Sep, 12AM (local time) - 4ft (1.2m), 9s period with ESE 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 Tuesday (Sep 15) at 12AM. The primary swell is predicted to be 1.2m and 9s period with a secondary swell of 0.4m and 12s. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Aoshima in the next 16 days are 1.4m 17s and forecast to arrive on Friday (Sep 18) at 3PM. Winds are predicted to be onshore at the time the swell arrives.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+)12AM (Tue 15th Sep)4ft (1.2m) 9s
Best Surf12AM (Tue 15th Sep)4ft (1.2m) 9s
Most Powerful 3PM (Fri 18th Sep)4.5ft (1.4m) 17s

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


The Lowdown

G'day, I'm Rusty. Let's have a look at what's on the cards for Aoshima over the next couple of weeks. Straight up, the window to get a decent wave is going to be a long and frustrating wait. We're looking at a big gap with mostly poor conditions before anything even becomes rideable, and even then, you'll need to be careful what you pick.

For the first ten days or so, from now through to about the 19th of September, I'd honestly find something else to do. The swell is small and messy, the wind is mostly onshore or cross-onshore, and the forecast is just a write-off. There are a couple of days where the combined energy bumps up a bit, like on the 15th with a reading of 357 (moderate), but it's paired with risk of thunderstorms and cross-onshore breezes. You’re looking at a fair bit of chop and poor surf quality.

Now, the week starting the 21st of September gets interesting, but only if you know what you’re doing and you’re comfortable in big, heavy water. Aoshima (a reef break) is going to be hit by a serious wall of swell. On Monday the 21st, the morning sees a massive 28 ft swell from the SE with a period of 15 seconds. The combined energy is an enormous 31669 (very strong), and while the wind is a moderate offshore at first, the swell is just too big. This is expert-only territory, and honestly, the setup looks more interesting for kite surfing than paddle surfing. Even the afternoon has a 33 ft swell, but that's 40793 in energy – absolutely pumping, but too dangerous for a standard surf. You'd get towed into something wild if you had the gear.

After that, things drop off quickly into the 22nd with an onshore blow and messy conditions. By the 24th, the swell is tiny at 2 ft, even with clean offshore winds. It’s not worth a paddle.

The best chance for a decent surf actually comes at the very end of the forecast, on Friday the 25th of September. Friday morning shows a 6 ft swell from the ESE at a solid 16 seconds (a true groundswell). The energy is at 1614 (moderate to strong), and the wind is light and cross-shore, almost glassy. This is the standout. A long-period swell like this is best for a reef or point break like Aoshima, and the water is around 82°, which is about average for the time of year. It's a bit on the bigger side for a beginner, but for anyone else, this is the window. Crowds can be a thing here sometimes, so get out early. Saturday the 26th still has size – up to 10 ft – but the wind swings cross-onshore and it gets choppier, and at that size it's getting out of intermediate territory.

So, in short, it's a slow burner. Sit through the first week and a half of nothing, then prepare for either a massive, dangerous swell or the one golden window on the 25th. Keep an eye on it.

Rusty.

Short Range Forecast

Light rain (total 2mm), mostly falling on Fri afternoon. Warm (max 27°C on Sun morning, min 25°C on Fri morning). Wind will be generally light.

Days 4-6 Weather Summary

Heavy rain (total 20mm), heaviest during Tue morning. Warm (max 27°C on Mon morning, min 24°C on Mon night). Wind will be generally light.

Friday
11
Saturday
12
Sunday
13
Monday
14
Tuesday
15
Wednesday
16
Thursday
17
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
0
0
1
0
0
0
0
0
1
0
1
2
1
0
1
0
0
0
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)
0.9
SE
7
1.1
SE
7
0.5
E
14
0.5
E
14
0.5
E
14
0.6
E
14
0.8
ESE
14
0.6
E
13
1
ESE
9
1.1
ESE
8
1.1
ESE
8
1.2
ESE
9
1.3
ESE
9
1.4
ESE
9
1.2
ESE
9
1.1
ESE
9
1.1
E
9
1
ESE
9
0.9
ESE
9
0.9
ESE
9
0.8
ESE
9
Wave Graph
Metric surfscale
Energy kJ
89
118
97
99
96
134
250
128
161
160
164
232
268
307
254
184
199
162
131
108
101
Wind (km/h)
10
NNE
10
ENE
5
N
15
NNE
10
ENE
10
N
10
NNE
10
E
10
NE
10
NNE
10
E
5
S
10
NNE
10
NNE
10
NE
15
NNE
15
NE
15
NNE
15
NNE
15
NE
20
NNE
Wind State
cross-on
on
cross-on
cross-on
on
cross
cross-on
on
cross-on
cross-on
cross-on
cross-off
cross-on
cross-on
cross-on
cross-on
on
cross-on
cross-on
cross-on
cross-on
High Tide
6:17PM2.17m
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
11:59AM0.34m
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
rain showers
clear
clear
clear
clear
clear
clear
thunderstorm
clear
cloud
light rain
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:54
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
1
3
3
2
2
2
4
4
2
2
5
Temp °C
26
26
25
26
26
26
27
27
26
27
27
26
24
25
25
25
26
25
26
26
25
Feels °C
29
29
29
29
30
31
30
30
30
30
31
29
28
28
29
28
29
27
29
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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