Surf Forecasts:
Aoshima surf forecast from 12 Aug 2026:
- Best quality surf: Wednesday 12 Aug, 9PM (local time) - 3ft (0.9m), 12s period, E swell with offshore winds.
- Most powerful swell: Monday 17 Aug, 3AM (local time) - 4.5ft (1.3m), 10s period, E swell with 327 kJ wave energy.
- Next surfable swell (1★+): Wednesday 12 Aug, 9PM (local time) - 3ft (0.9m), 12s 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 Wednesday (Aug 12) at 9PM. The primary swell is predicted to be 0.9m and 12s period with a secondary swell of 0.7m and 9s. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Aoshima in the next 16 days are 1.3m 10s and forecast to arrive on Monday (Aug 17) at 3AM. Winds are predicted to be glassy at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 3s period and expected on Thursday (Aug 13) at 12AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9PM (Wed 12th Aug) | 3ft (0.9m) 12s |
| Best Surf | 9PM (Wed 12th Aug) | 3ft (0.9m) 12s |
| Most Powerful | 3AM (Mon 17th Aug) | 4.5ft (1.3m) 10s |
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.
First off, the water’s sitting at a warm 84°F, which is pretty much bang on average for this time of year, so no surprises there.
The outlook is a bit of a mixed bag, with a lot of flat or poor days to wade through. We’ve got a gap of several days with no real recommendations right now, so don’t be in a rush. The first proper window of opportunity doesn’t arrive until the morning of Saturday the 15th. That morning, the wind goes glassy with a light ENE breeze, and we’ve got a clean 3ft easterly swell. The combined energy is moderate at 222, and it’s a 10-second period, so there’s a bit of push behind it. It’s not going to be pumping, but it’ll be clean and surfable. Expect good surf conditions.
The real standout, and I mean the one to circle on the calendar, is the morning of Saturday the 22nd. We’re looking at a solid 5ft swell from the south, with a light southerly cross-offshore breeze keeping things clean. The combined energy jumps up to 527 (moderate to strong), and the period is 8 seconds. This is the biggest, cleanest surf of the whole forecast. The size is getting into that ‘too big for beginners’ territory, but for anyone with a bit of experience, this is the best on offer. The water’s still warm, and the conditions are set to be very good.
Keep in mind, Aoshima is a reef break, and it’s exposed to the SE, but the standout morning is coming from the south. The consistency is fairly consistent, but crowds can show up sometimes, so that’s worth keeping in the back of your mind for that Saturday morning.
Saturday afternoon and Sunday morning on the 22nd and 23rd drop off quickly, with cross-shore and onshore winds messing things up. The second week looks pretty grim overall, with a lot of small, choppy, or onshore wind days. The morning of the 27th of August has a 4ft ESE swell with a cross-offshore wind, but it’s still marginal. The energy is strong at 476, but the conditions are questionable.
So, to sum it up: don’t get excited for the next week or so. The morning of Saturday the 15th is a decent little warm-up, but the real call is the morning of Saturday the 22nd. That’s your session.
Rusty.
Short Range ForecastMostly dry. Warm (max 28°C on Wed afternoon, min 24°C on Thu night). Wind will be generally light. | Days 5-7 Weather SummaryModerate rain (total 11mm), heaviest on Mon morning. Warm (max 28°C on Sun afternoon, min 24°C on Sat night). Wind will be generally light. | |||||||||||||||||||
Wed 12 | Thursday 13 | Friday 14 | Saturday 15 | Sunday 16 | Monday 17 | Tuesday 18 | ||||||||||||||
PM | 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 11 | E 11 | E 10 | E 10 | E 10 | E 9 | E 10 | E 11 | E 10 | E 10 | E 10 | E 10 | E 10 | E 10 | E 10 | E 10 | E 10 | E 10 | E 10 | E 10 |
Wave Graph  | ||||||||||||||||||||
 kJ | 279 | 112 | 72 | 69 | 66 | 62 | 87 | 141 | 162 | 165 | 159 | 156 | 192 | 233 | 279 | 231 | 234 | 192 | 188 | 149 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | glassy | glassy | cross | off | glassy | cross | cross-off | glassy | cross-on | glassy | cross-on | cross-on | glassy | glassy | cross-on | glassy | on | on | cross-on |
High Tide | 6:31PM2.13m | 5:44AM2.15m | 6:57PM2.16m | 6:25AM2.20m | 7:23PM2.17m | 7:04AM2.21m | 7:48PM2.17m | 7:43AM2.16m | 8:14PM2.14m | 8:24AM2.07m | 8:40PM2.10m | 9:08AM1.93m | 9:08PM2.04m | |||||||
Low Tide | 00:07AM1.00m | 12:23PM0.17m | 00:39AM0.87m | 12:56PM0.22m | 1:12AM0.76m | 1:28PM0.32m | 1:45AM0.68m | 1:59PM0.46m | 2:20AM0.62m | 2:30PM0.63m | 2:58AM0.61m | 3:01PM0.83m | ||||||||
 |  | | | | | | |  | |  | | |  |  | | | | | | |
 | — | — | 5:37 | — | — | 5:37 | — | — | 5:37 | — | — | 5:37 | — | — | 5:39 | — | — | 5:39 | — | — |
 | 7:00 | — | — | 7:00 | — | — | 6:59 | — | — | 6:58 | — | — | 6:57 | — | — | 6:55 | — | — | 6:54 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | 2 | 4 | 3 | — | 2 | — | 2 |
Temp °C | 28 | 26 | 27 | 28 | 26 | 27 | 28 | 26 | 26 | 27 | 25 | 27 | 28 | 26 | 28 | 28 | 27 | 27 | 28 | 26 |
Feels °C | 28 | 29 | 31 | 29 | 28 | 29 | 29 | 29 | 30 | 29 | 28 | 29 | 30 | 30 | 31 | 31 | 31 | 29 | 29 | 28 |
Swell 1 Height (m) Direction Period (s) | E 11 | E 11 | S 9 | S 9 | S 8 | E 9 | E 10 | E 11 | E 10 | E 10 | E 10 | E 10 | E 10 | E 10 | E 10 | E 10 | E 10 | E 10 | E 10 | E 10 |
| kJ | 279 | 112 | 59 | 57 | 52 | 62 | 87 | 141 | 162 | 165 | 159 | 156 | 192 | 233 | 279 | 231 | 234 | 192 | 188 | 149 |
Swell 2 Height (m) Direction Period (s) | S 9 | S 9 | E 10 | E 10 | E 10 | S 8 | S 8 | S 9 | S 9 | S 9 | S 8 | S 8 | S 8 | S 8 | S 8 | SSE 8 | S 8 | S 8 | S 8 | S 8 |
| kJ | 87 | 81 | 72 | 69 | 66 | 52 | 51 | 39 | 56 | 54 | 50 | 52 | 35 | 33 | 21 | 22 | 20 | 19 | 10 | 10 |
Swell 3 Height (m) Direction Period (s) | NNE 5 | NNE 4 | SE 12 | ESE 12 | ESE 12 | SE 11 | E 11 | SSE 5 | SE 11 | E 10 | SE 10 | SE 10 | — | SE 11 | SE 11 | SE 11 | SE 11 | SE 11 | SE 10 | SE 10 |
| kJ | 17 | 2 | 6 | 14 | 14 | 5 | 9 | 9 | 4 | 2 | 4 | 4 | — | 31 | 31 | 30 | 30 | 29 | 28 | 27 |
Wind waves Height (m) Direction Period (s) | — | SW 3 | — | S 3 | SSE 3 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | 2 | — | 1 | 2 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 330 | 0 | 0 | 297 | 0 | 0 | 330 | 0 | 0 | 50 | 0 | 20 | 50 | 0 | 0 | 330 | 0 | 48 | 709 | 38 |
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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