Surf Forecasts:
Aoshima surf forecast from 15 Aug 2026:
- Best quality surf: Sunday 16 Aug, 12AM (local time) - 3ft (0.9m), 10s period, E swell with glassy winds.
- Most powerful swell: Thursday 20 Aug, 9PM (local time) - 11ft (3.5m), 9s period, SE swell with 1,656 kJ wave energy.
- Next surfable swell (1★+): Sunday 16 Aug, 12AM (local time) - 3ft (0.9m), 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 Sunday (Aug 16) at 12AM. The primary swell is predicted to be 0.9m 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 3.5m 9s and forecast to arrive on Thursday (Aug 20) at 9PM. 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+) | 12AM (Sun 16th Aug) | 3ft (0.9m) 10s |
| Best Surf | 12AM (Sun 16th Aug) | 3ft (0.9m) 10s |
| Most Powerful | 9PM (Thu 20th Aug) | 11ft (3.5m) 9s |
Table - best surf conditions forecast for Aoshima over the next 16 days.
The Lowdown
G'day, I'm Rusty. Well, let's have a look at what's in store for Aoshima over the next couple of weeks. It's a bit of a mixed bag to be honest, a real slow burner. We've got some clean windows here and there, but you're going to have to be patient and pick your moments. The real standout is shaping up to be the Tuesday morning of the 25th, but that's a fair way off, so we'll keep an eye on it.
Right now, through the weekend and into the early part of next week, it's mostly a write-off for anything decent. The swell is tiny, around 3ft to 3ft from the east, but the problem is the wind. It's a cross-onshore breeze for most of the afternoons, chopping things right up. The water temp is a warm 84°F, which is about average for this time of year, so that's nice at least.
But there are a couple of windows in there. Sunday morning the 16th, we get a glassy period with that same small 3ft east swell (combined energy of 212). It's small, but clean. Then again on Monday morning the 17th, glassy conditions again with a 3ft east swell (combined energy of 238). You'll need a longboard or a foily for these. Just be aware, Aoshima can get crowded sometimes.
You'll see a bit of a pulse mid-week with some stormy weather and a jump in swell, but it's not clean. By Friday the 21st, the swell picks up to 6ft from the south (combined energy of 924), but it's still cross-onshore and looks messy. That pattern hangs around Saturday the 22nd too. The setup here, with that much wind and a beach/reef break, might be more interesting for the kite surfers than us paddle guys for those days.
Now, here's where it gets interesting. We've got a spell from the 23rd to the 26th that has real promise. Sunday the 23rd morning kicks off with glassy conditions and a 4ft south swell (combined energy of 317). Nice and clean.
But the real standout is Tuesday the 25th of August. The morning session is your target. We're looking at a solid 7ft swell from the east-southeast, and the period is a very long 16 seconds (combined energy of 2568). That's proper groundswell energy. And the best part? Glassy conditions, with the wind coming from the northeast. This is excellent surf for experienced surfers; that size is too big for beginners. Because it's such a long period swell, it might be a bit straight at the beach, but it could link up nicely. Just a heads up, that is a week and a half away, so it's a promising forecast but not locked in yet.
The day before, Monday the 24th, also has a clean glassy morning with a smaller 3ft groundswell (combined energy of 421) and a 13-second period. That's a great warm-up session.
After that peak, Wednesday the 26th morning is still very good, with a 6ft east-southeast swell (combined energy of 995) and glassy conditions. Clean waves for the experienced crew.
We then fade out into a tiny, poor run of surf for the last few days of the month and into the 30th. There's a small clean window on Saturday the 29th afternoon with a 2ft east swell (combined energy of 222) and a cross-offshore breeze, and again on Sunday the 30th morning with a clean offshore wind and the same tiny 2ft east swell (combined energy of 177). It's surfable but tiny, a longboard-only affair.
So to wrap it up, the early week is a struggle, but keep your eyes peeled for the 23rd through to the 26th, with Tuesday the 25th being the one to circle if you've got the experience for it.
Stay salty,
Rusty
Short Range ForecastLight rain (total 3mm), mostly falling on Sat night. Warm (max 28°C on Sun morning, min 25°C on Sun night). Wind will be generally light. | Days 5-7 Weather SummaryHeavy rain (total 101mm), heaviest during Thu afternoon. Warm (max 27°C on Tue night, min 25°C on Wed night). Wind will be generally light. | ||||||||||||||||||
Sunday 16 | Monday 17 | Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | ||||||||||||||
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) | E 10 | E 10 | E 10 | E 10 | E 10 | E 10 | E 9 | E 9 | E 9 | E 9 | E 9 | ESE 6 | E 8 | ESE 7 | ESE 8 | SE 9 | SSE 10 | SSE 10 | SSE 9 |
Wave Graph | |||||||||||||||||||
162 | 156 | 162 | 192 | 188 | 181 | 134 | 132 | 104 | 125 | 74 | 113 | 156 | 316 | 468 | 1628 | 416 | 335 | 265 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | cross | cross-on | glassy | glassy | cross-on | glassy | on | cross-on | on | on | on | on | on | cross-on | cross-on | cross | cross | cross |
High Tide | 7:43AM2.16m | 8:14PM2.14m | 8:24AM2.07m | 8:40PM2.10m | 9:08AM1.93m | 9:08PM2.04m | 10:00AM1.78m | 9:38PM1.97m | 11:12AM1.62m | 10:15PM1.88m | 1:15PM1.55m | 11:10PM1.79m | |||||||
Low Tide | 1:45AM0.68m | 1:59PM0.46m | 2:20AM0.62m | 2:30PM0.63m | 2:58AM0.61m | 3:01PM0.83m | 3:41AM0.63m | 3:33PM1.04m | 4:34AM0.67m | 4:11PM1.24m | 5:47AM0.70m | 5:15PM1.43m | |||||||
— | 5:37 | — | — | 5:39 | — | — | 5:39 | — | — | 5:39 | — | — | 5:41 | — | — | 5:41 | — | — | |
6:58 | — | 6:57 | — | — | 6:55 | — | — | 6:54 | — | — | 6:53 | — | — | 6:52 | — | — | 6:52 | — | |
mm | 2 | — | — | — | — | — | — | — | 1 | 2 | — | 5 | 9 | 11 | 39 | 20 | 7 | 8 | 15 |
Temp °C | 26 | 28 | 28 | 26 | 27 | 28 | 27 | 28 | 28 | 27 | 27 | 27 | 26 | 27 | 26 | 27 | 27 | 27 | 27 |
Feels °C | 30 | 30 | 30 | 30 | 30 | 31 | 31 | 31 | 31 | 31 | 29 | 29 | 29 | 29 | 28 | 30 | 30 | 30 | 30 |
Swell 1 Height (m) Direction Period (s) | E 10 | E 10 | E 10 | E 10 | E 10 | E 10 | E 9 | E 9 | E 9 | E 9 | E 9 | E 8 | E 8 | — | ESE 8 | ESE 9 | ESE 8 | ESE 8 | ESE 8 |
162 | 156 | 162 | 192 | 188 | 181 | 134 | 132 | 104 | 125 | 74 | 68 | 156 | — | 468 | 789 | 314 | 262 | 183 | |
Swell 2 Height (m) Direction Period (s) | S 8 | S 8 | S 8 | S 8 | SSE 8 | S 8 | S 8 | S 7 | S 7 | S 6 | SSE 6 | SE 10 | SE 7 | — | S 14 | SSE 10 | SSE 10 | SSE 10 | SSE 9 |
49 | 52 | 34 | 31 | 19 | 18 | 18 | 17 | 16 | 17 | 13 | 26 | 102 | — | 4 | 392 | 416 | 335 | 265 | |
Swell 3 Height (m) Direction Period (s) | SE 10 | SE 10 | — | SE 11 | SE 11 | SE 11 | SE 11 | SE 11 | SE 11 | SE 10 | SSW 8 | SSW 8 | SE 10 | — | — | — | ENE 7 | ENE 9 | ENE 9 |
4 | 4 | — | 19 | 31 | 30 | 30 | 18 | 18 | 27 | 12 | 6 | 26 | — | — | — | 70 | 16 | 26 | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | E 8 | E 5 | ESE 6 | ENE 6 | ESE 7 | SSE 8 | SE 9 | — | — | — |
— | — | — | — | — | — | — | — | — | 108 | 28 | 113 | 42 | 316 | 365 | 1628 | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 359 | 2 | 0 | 297 | 0 | 0 | 709 | 8 | 38 | 330 | 38 | 283 | 850 | 50 | 283 | 645 | 50 | 283 | 330 |
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.











