Surf Forecasts:
Aoshima surf forecast from 9 Sep 2026:
- Best quality surf: Tuesday 15 Sep, 12AM (local time) - 4.5ft (1.4m), 9s period, ESE swell with glassy winds.
- Most powerful swell: Tuesday 15 Sep, 12PM (local time) - 5ft (1.5m), 9s period, E swell with 380 kJ wave energy.
- Next surfable swell (1★+): Saturday 12 Sep, 6PM (local time) - 2ft (0.6m), 14s 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 (Sep 12) at 6PM. The primary swell is predicted to be 0.6m and 14s period with a secondary swell of 0.4m and 6s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Aoshima in the next 16 days are 1.5m 9s and forecast to arrive on Tuesday (Sep 15) at 12PM. Winds are predicted to be cross-onshore at the time the swell arrives.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6PM (Sat 12th Sep) | 2ft (0.6m) 14s |
| Best Surf | 12AM (Tue 15th Sep) | 4.5ft (1.4m) 9s |
| Most Powerful | 12PM (Tue 15th Sep) | 5ft (1.5m) 9s |
Table - best surf conditions forecast for Aoshima over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s have a look at what Aoshima’s got cooking for us over the next couple of weeks.
Straight up, it’s a tough start. We’re looking at a solid block of days with nearly nothing worth paddling out for. The first good window doesn't roll around until around Tuesday the 15th, and even then it’s only just *marginal*. Before that, from the 10th through the 14th, we’re dealing with poor surf conditions and cross-onshore winds that are keeping things messy. A few of those days have a bit of swell, but the wind is just ruining it.
The real story here, and the standout by a long shot, is the massive pulse that’s forecast to arrive on the 20th and 21st. This is a serious groundswell event. By Sunday the 20th, we’re looking at waves bumping up to 8ft from the ESE with a very long period of 17 seconds. The combined energy is through the roof at (3667). But hold up – the wind is still a problem, blowing cross-on at 12 mph, so it’s not going to be clean. The models are hinting that the real magic might be on Monday the 21st, even though the swell is huge at 15ft to 18ft from the SE. The wind is onshore, but the guidance is saying the conditions might come together for this break. This is big, powerful stuff – over 8ft, so it’s strictly for the experienced crew. That long period will give it a lot of punch, but at a reef like Aoshima, it might just line up beautifully.
For a more manageable option, the morning of Tuesday the 15th sees a small uptick. Swell around 5ft from the ESE with a period of 9 seconds, and a light breeze. The wave energy is moderate (341). It’s still only a “marginal” call, and the wind is onshore, but it’s the best of a pretty poor bunch before the big stuff hits.
After the big swell peaks on the 21st and 22nd, it drops back down quickly. The 23rd sees a shift in wind to a fresh cross-shore from the NNW, but the swell is still a solid 8ft and dropping. By the 24th and 25th, we're back to tiny, weak waves and messy onshore winds.
Honestly, Aoshima is having a rough run. The first week is a write-off, then we get a window of huge, challenging swell. If you’re an expert and you can handle a bit of onshore wind for the sake of size, keep an eye on the 21st. Otherwise, it’s a waiting game.
Rusty.
Short Range ForecastModerate rain (total 13mm), heaviest on Wed night. Warm (max 26°C on Wed night, min 23°C on Wed night). Winds decreasing (fresh winds from the NNE on Wed night, calm by Sat afternoon). | Days 5-7 Weather SummaryHeavy rain (total 44mm), heaviest during Tue morning. Warm (max 28°C on Sun afternoon, min 23°C on Tue morning). Wind will be generally light. | ||||||||||||||||||
Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | Tuesday 15 | ||||||||||||||
Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Swell Height Map |  |  |  |  |  |  |  | ||||||||||||
Wave Height (m) Direction Period (s) | SE 8 | ENE 7 | E 7 | NE 6 | E 15 | SE 7 | SE 7 | E 14 | E 14 | E 14 | E 14 | E 13 | ESE 8 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | E 9 | E 9 |
Wave Graph  | |||||||||||||||||||
 kJ | 104 | 181 | 203 | 102 | 73 | 137 | 69 | 99 | 96 | 134 | 184 | 128 | 123 | 184 | 227 | 294 | 333 | 332 | 235 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | on | glassy | cross-on | on | cross-on | cross-on | on | glassy | on | cross-on | cross-on |
High Tide | 4:56AM2.07m | 5:52PM2.13m | 5:37AM2.18m | 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 | |||||||
Low Tide | 11:13PM0.94m | 11:25AM0.33m | 11:44PM0.77m | 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 | ||||||
 |  | |  |  | |  |  |  |  | | |  | | |  |  | | | |
 | — | 5:54 | — | — | 5:54 | — | — | 5:54 | — | — | 5:56 | — | — | 5:56 | — | — | 5:56 | — | — |
 | 6:29 | — | 6:27 | — | — | 6:25 | — | — | 6:24 | — | — | 6:22 | — | — | 6:22 | — | — | 6:21 | — |
mm | 6 | 2 | 3 | 1 | — | — | — | — | 1 | — | — | — | 2 | — | 1 | 6 | 24 | 11 | 4 |
Temp °C | 26 | 23 | 23 | 24 | 25 | 26 | 25 | 26 | 26 | 26 | 27 | 28 | 26 | 27 | 27 | 24 | 24 | 23 | 24 |
Feels °C | 23 | 22 | 24 | 25 | 27 | 29 | 28 | 29 | 30 | 31 | 30 | 31 | 30 | 30 | 30 | 27 | 27 | 26 | 28 |
Swell 1 Height (m) Direction Period (s) | SE 8 | SE 8 | SE 7 | ENE 6 | SE 7 | SE 7 | SE 7 | SSE 7 | E 14 | E 14 | E 14 | ESE 9 | ESE 8 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | E 9 | E 9 |
| kJ | 104 | 164 | 65 | 68 | 73 | 137 | 69 | 40 | 96 | 134 | 184 | 61 | 123 | 184 | 227 | 294 | 333 | 332 | 235 |
Swell 2 Height (m) Direction Period (s) | ESE 10 | E 16 | ESE 9 | SE 7 | E 15 | E 15 | ENE 8 | E 14 | SE 6 | ESE 10 | SSE 7 | E 13 | E 13 | E 13 | E 13 | E 16 | S 7 | E 14 | E 15 |
| kJ | 33 | 21 | 8 | 75 | 69 | 74 | 34 | 99 | 19 | 31 | 15 | 128 | 123 | 84 | 84 | 21 | 1 | 66 | 42 |
Swell 3 Height (m) Direction Period (s) | E 17 | E 16 | E 16 | ESE 9 | ESE 11 | ENE 8 | E 14 | ENE 7 | ENE 7 | SE 6 | ENE 7 | S 6 | S 7 | S 7 | S 7 | S 7 | S 7 | S 7 | E 13 |
| kJ | 24 | 47 | 21 | 17 | 12 | 24 | 62 | 19 | 18 | 9 | 4 | 13 | 3 | 4 | 4 | 1 | 4 | 1 | 14 |
Wind waves Height (m) Direction Period (s) | NE 6 | ENE 7 | E 7 | NE 6 | ENE 5 | ENE 5 | NE 8 | NE 7 | — | — | — | ENE 6 | — | — | — | — | NNE 3 | NNE 4 | — |
| kJ | 95 | 181 | 203 | 102 | 32 | 21 | 59 | 39 | — | — | — | 4 | — | — | — | — | 3 | 28 | — |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 283 | 48 | 38 | 38 | 38 | 50 | 23 | 20 | 50 | 0 | 50 | 297 | 38 | 20 | 50 | 0 | 38 | 20 | 20 |
Best forecast wave conditions in Kyu Shu | |||||||||||||||||||
Best forecast wave conditions in Japan | |||||||||||||||||||
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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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