Aoshima Surf Break

Lat Long: 31.81° N 131.47° E

Aoshima Surf Forecast and Surf Report

Issued: 8 pm 21 Aug 2026 (local time)

Forecast update in  hr  min

Today's Aoshima sea temperature is
28.7° C
0.2° 

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


Aoshima surf forecast from 21 Aug 2026:

  • Best quality surf: Wednesday 26 Aug, 6AM (local time) - 20ft (6.0m), 13s period, SSE swell with cross-onshore winds.
  • Most powerful swell: Wednesday 26 Aug, 6AM (local time) - 20ft (6.0m), 13s period, SSE swell with 11,546 kJ wave energy.
  • Next surfable swell (1★+): Saturday 22 Aug, 9PM (local time) - 2ft (0.6m), 10s 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 Saturday (Aug 22) at 9PM. The primary swell is predicted to be 0.6m and 10s period with a secondary swell of 0.6m and 8s. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Aoshima in the next 16 days are 6.0m 13s and forecast to arrive on Wednesday (Aug 26) at 6AM. Winds are predicted to be cross-onshore at the time the swell arrives.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+) 9PM (Sat 22nd Aug)2ft (0.6m) 10s
Best Surf 6AM (Wed 26th Aug)20ft (6.0m) 13s
Most Powerful 6AM (Wed 26th Aug)20ft (6.0m) 13s

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


The Lowdown

G’day, Rusty here. Lookin’ at the 16-day window for Miyazaki, it’s a bit of a mixed bag. We’ve got some serious size showing up later on, but the wind and conditions are gonna make it hard to score clean waves for a good stretch. There’s a real gap at the start with nothing worthwhile, and then a big pulse of energy that’s more for the brave or the kiter.

We kick off with a quiet run from Saturday the 22nd to Sunday the 23rd. The swell is tiny, only 2ft from the SSE and E, but it's all cross-onshore, creating small wind ripples. The combined wave energy is weak (126 to 182), and it’s just poor surf. Not worth paddling out for.

Come Monday the 24th, things start to shift. Monday morning sees a small 2ft ESE swell creep in, with a very long period of 20 seconds. The combined energy bumps to a moderate 538, but it's onshore and wind is light. The afternoon gets more interesting – a 6.2ft ESE groundswell, with that real long 17-second period, drives the energy up to a strong 2134. But it's onshore wind again, so we’re looking at marginal conditions at best. That long period will make it fat and walled-up at this exposed reef break, but the wind kills it.

Then we hit a wall of huge ugly energy. From Tuesday the 25th right through to Wednesday the 26th, a powerful SE swell builds. Tuesday morning we’ve got 13ft at 16 seconds with 19 mph cross-onshore winds and a combined energy of a whopping 9596. The afternoon hits 15ft at 16 seconds with 22 mph onshore winds, energy at 10609. Wednesday is just as wild – 15ft at 13 seconds with 28 mph cross-onshore winds, energy at 6740. This is way over 8ft, so it’s expert-only territory, and with those strong winds and a big chunk of sea energy, it’s messy as hell. Honestly, this looks more like a kite-surfing scenario than a paddle session. Aoshima is an exposed reef, but onshore winds and giant chop make it a no-go.

Thursday the 27th sees the swell drop a bit but still remain big. We’ve got 8.2ft to 9.8ft from the SSE, with moderate cross-shore winds. Energy stays moderate to strong (1158-2692). The surf is still marginal, but at least the size is dropping into a more manageable range for experienced surfers. The periods drop to 9 seconds, so it’s a shorter, weaker wind swell on top of the background.

Friday the 28th into Saturday the 29th sees the swell drop further, with 5.2ft to 5.9ft from the SE, but it’s onshore and chasing rain showers. Not much to get excited about. Combined energy falls back to 271-631. Poor or marginal.

Now, Sunday the 30th and Monday the 31st. The swell starts to fill in again. Sunday morning brings back a 6.2ft ESE groundswell with a 13-second period, energy at a healthy 1416. Wind is light onshore, but it’s still marginal. Monday the 31st is our first real standout for the window, but it’s not perfect. Monday morning offers 7.9ft from the ESE at 12 seconds. Combined energy is solid at 1553, and the wind is a light cross-onshore at 6 mph. That’s light enough to smooth things out, and the score is our highest so far at a 3. The afternoon pushes 8.2ft with a bit more period at 13 seconds, energy hitting 2112. It’s still onshore but building. For an exposed reef, this is the best on offer early in the window. It’s not polished, but there’ll be power.

The real standout, though, is Tuesday the 1st of September. It’s a good week and a half out, so take it as promising but not locked in. Tuesday afternoon shows 13ft from the E at 11 seconds, with a combined energy of 6964. The wind is light onshore from the NE at 9 mph. The score for that session hits a 4, the best rating of the whole run. That’s solid, powerful surf and the wind is manageable. But then Wednesday the

Short Range Forecast

Some drizzle, heaviest during Sat morning. Warm (max 28°C on Sat morning, min 25°C on Sat night). Wind will be generally light.

Days 5-7 Weather Summary

Heavy rain (total 100mm), heaviest during Wed night. Warm (max 28°C on Tue afternoon, min 26°C on Mon night). Winds increasing (light winds from the NE on Mon night, strong winds from the ESE by Tue night).

Saturday
22
Sunday
23
Monday
24
Tuesday
25
Wednesday
26
Thursday
27
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
0
0
1
1
1
2
0
0
0
0
0
0
1
2
1
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.8
SSE
9
0.7
SSE
8
0.6
E
10
0.6
E
10
0.6
E
10
0.6
E
10
0.7
ESE
12
0.6
ESE
20
1.9
ESE
17
3
ESE
16
4
SE
16
4.5
SE
16
5
SE
15
4.5
SE
13
4
SE
11
3.5
SSE
9
2.5
SE
9
3
SSE
9
2.4
SSE
9
Wave Graph
Metric surfscale
Energy kJ
106
73
70
73
71
78
138
264
2097
4703
9392
10539
11292
6652
3842
1926
1083
1404
900
Wind (km/h)
5
E
10
E
10
E
5
ENE
10
NNE
10
ESE
10
E
15
NE
15
ENE
20
NE
30
NE
35
NE
40
E
45
ESE
35
SE
40
SSE
25
SSE
20
SSE
20
ESE
Wind State
glassy
cross-on
cross-on
on
cross-on
cross-on
cross-on
on
on
on
cross-on
on
cross-on
cross-on
cross
cross
cross
cross
cross-on
High Tide
11:10PM1.79m
3:33PM1.65m
00:50AM1.73m
4:30PM1.80m
2:33AM1.77m
5:05PM1.93m
3:44AM1.89m
5:34PM2.03m
4:36AM2.02m
6:00PM2.11m
5:21AM2.13m
6:25PM2.16m
Low Tide
7:22AM0.69m
7:52PM1.52m
8:50AM0.59m
9:39PM1.43m
9:52AM0.46m
10:31PM1.29m
10:39AM0.34m
11:08PM1.13m
11:19AM0.27m
11:41PM0.97m
11:55AM0.25m
00:12AM0.81m
clear
thunderstorm
clear
clear
clear
clear
clear
clear
clear
part cloud
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:41
5:43
5:43
5:43
5:45
5:45
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:52
6:51
6:50
6:47
6:46
6:45
6:45
 mm
1
1
6
17
16
10
31
11
8
20
Temp °C
27
28
28
27
28
28
27
28
28
27
27
28
28
27
27
27
27
28
27
Feels °C
33
31
31
33
31
31
32
30
30
30
27
28
28
26
27
26
29
31
29
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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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