
Surf Forecasts:
Aoshima surf forecast from 5 Aug 2026:
- Best quality surf: Thursday 6 Aug, 9AM (local time) - 21ft (6.5m), 15s period, ESE swell with cross-onshore winds.
- Most powerful swell: Thursday 6 Aug, 6PM (local time) - 21ft (6.5m), 16s period, ESE swell with 21,568 kJ wave energy.
- Next surfable swell (1★+): Thursday 6 Aug, 9AM (local time) - 21ft (6.5m), 15s 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 Thursday (Aug 06) at 9AM. The primary swell is predicted to be 6.5m and 15s period with a secondary swell of 5.5m and 15s. The wind is predicted to be cross-onshore as the swell arrives.
The most powerful waves expected at Aoshima in the next 16 days are 6.5m 16s and forecast to arrive on Thursday (Aug 06) at 6PM. Winds are predicted to be onshore at the time the swell arrives.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9AM (Thu 6th Aug) | 21ft (6.5m) 15s |
| Best Surf | 9AM (Thu 6th Aug) | 21ft (6.5m) 15s |
| Most Powerful | 6PM (Thu 6th Aug) | 21ft (6.5m) 16s |
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’s cooking for Aoshima over the next couple of weeks. I gotta be straight with you – it’s a rough start. We’ve got a solid window of time where the ocean is just not cooperating. The first recommendation for a surf doesn't even roll around until the 14th of August, so we’re looking at a dry spell of over a week before anything worth paddling out for shows up.
Aoshima is a reef setup, and it’s fairly consistent, but the winds early on are just ugly. The water temp is sitting at 85°, which is about normal for this time of year, no shock there. But from the start of the month through to the 13th, we’re stuck with a run of poor conditions. A massive swell comes through on the 6th and 7th of August – we’re talking 21ft and 20ft of swell from the ESE with a very long period of 15 to 17 seconds (combined energy readings of 29,626 and 35,289). That’s a *lot* of water, but it’s a mix of strong onshore and cross-onshore winds, and the wave comment is clear: too big for this break. That’s expert-only territory, and even then, the wind is gonna make it a sloppy mess. The rest of that first week is just one poor surf condition after another with fresh to strong breezes messing up the face.
Things start to settle down a little around the 12th and 13th, but it’s only marginal. The swell drops to 5ft and then 3ft, period hangs around 11 seconds, but it's still cross-onshore. Not worth getting wet for.
Now, here’s a tiny glimmer. On the morning of the 14th of August, we get a moment of pure glass. The wind goes glassy from the NNE, and the swell is a tiny 2ft from the south with a period of 9 seconds. The wave comment says “surfable waves but very ordinary conditions.” For a reef break, that’s a long-period groundswell, but it’s small. It’s the only time in the first two weeks where the wind is truly clean. The 15th of August morning also has a glassy moment with a 2ft swell from the east, but it's the same story – small and ordinary. If you’re desperate for a longboard or a funboard, those two mornings are your best bet, but don’t expect anything firing.
The 17th sees a bit of a bump in size, with 6ft on the Monday afternoon, but the wind is onshore and fresh, so it’s poor again. The 18th and 19th bring more swell, up to 7ft and then 12ft, and even a lovely 14-second period on the 19th, but the wind is cross-on and strong. The 20th of August finally shows a shift to a cross-shore breeze from the SE, with a 8ft swell from the east at 12 seconds (combined energy of 1,754). That’s a moderate energy, and the conditions are described as “marginal.” It’s not great, but it’s the best of the lot in the second week. The direction is east, and Aoshima’s optimum swell direction is SE, so it’s a bit off, but at least the wind is finally cross-shore.
Honestly, the standout? There isn’t a true one. The 14th morning’s glassy conditions are the only clean window, but it’s tiny. If you’re a beginner, the swell on the 14th and 15th is small enough (2ft), but when it does get bigger later in the window, it’s either too big or the wind is trash. The 20th has the best combo of size and wind, but it’s still marginal. Keep an eye on the forecasts, because this run of poor surf can’t last forever.
Rusty.
Short Range ForecastHeavy rain (total 63mm), heaviest during Fri night. Warm (max 28°C on Wed morning, min 27°C on Wed morning). Mainly strong winds. | Days 4-6 Weather SummaryHeavy rain (total 126mm), heaviest during Sat afternoon. Warm (max 28°C on Sat morning, min 26°C on Sat afternoon). Mainly strong winds. | ||||||||||||||||||||
Wednesday 5 | Thursday 6 | Friday 7 | Saturday 8 | Sunday 9 | Monday 10 | Tuesday 11 | |||||||||||||||
AM | 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) | ESE 16 | ESE 17 | ESE 16 | ESE 15 | ESE 15 | SE 16 | SSE 15 | SE 14 | SSE 14 | SSE 13 | ESE 10 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 8 | ESE 8 | ESE 8 | SE 8 | E 12 | E 12 |
Wave Graph | |||||||||||||||||||||
8650 | 11595 | 12393 | 17356 | 20372 | 18486 | 15796 | 6770 | 4080 | 2679 | 2810 | 1819 | 1496 | 1481 | 1640 | 1388 | 1141 | 1056 | 653 | 359 | 702 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-on | cross-on | on | on | on | on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on |
High Tide | 10:45AM1.67m | 10:27PM1.91m | 12:18PM1.56m | 11:14PM1.84m | 2:34PM1.58m | 00:24AM1.79m | 4:09PM1.71m | 1:55AM1.79m | 4:58PM1.85m | 3:13AM1.86m | 5:33PM1.97m | 4:12AM1.96m | 6:03PM2.06m | ||||||||
Low Tide | 4:14PM1.07m | 5:33AM0.72m | 5:04PM1.28m | 6:56AM0.70m | 6:41PM1.44m | 8:23AM0.61m | 8:51PM1.47m | 9:33AM0.47m | 10:08PM1.38m | 10:25AM0.34m | 10:56PM1.27m | 11:09AM0.24m | 11:33PM1.13m | ||||||||
5:31 | — | — | 5:31 | — | — | 5:33 | — | — | 5:33 | — | — | 5:33 | — | — | 5:35 | — | — | 5:35 | — | — | |
— | 7:07 | — | — | 7:07 | — | — | 7:06 | — | — | 7:05 | — | — | 7:04 | — | — | 7:02 | — | — | 7:01 | — | |
mm | 3 | 2 | 5 | 6 | 7 | 11 | 6 | 5 | 18 | 8 | 16 | 21 | 10 | 9 | 26 | 13 | 10 | 13 | 4 | 5 | 14 |
Temp °C | 28 | 28 | 27 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 28 | 28 | 27 |
Feels °C | 28 | 28 | 27 | 26 | 26 | 26 | 26 | 26 | 27 | 28 | 27 | 27 | 26 | 25 | 25 | 25 | 26 | 26 | 29 | 30 | 29 |
Swell 1 Height (m) Direction Period (s) | ESE 16 | ESE 17 | ESE 16 | ESE 15 | ESE 15 | SE 16 | SSE 15 | SE 14 | SSE 14 | SSE 13 | SSE 13 | S 12 | S 13 | S 12 | S 12 | S 11 | S 12 | S 12 | S 11 | SSE 8 | E 12 |
8650 | 11595 | 12393 | 12270 | 14917 | 18486 | 14349 | 6770 | 4080 | 2571 | 1379 | 799 | 747 | 773 | 636 | 640 | 773 | 389 | 244 | 307 | 702 | |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | ENE 15 | ENE 15 | ENE 15 | E 15 | E 16 | SE 15 | SE 15 | E 14 | E 13 | E 12 | E 12 | E 12 | SSE 7 |
— | — | — | — | — | — | — | — | 42 | 21 | 21 | 38 | 76 | 9 | 8 | 366 | 340 | 297 | 287 | 359 | 115 | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | SE 16 | — | — | — | S 16 | S 16 | — | SW 13 | S 11 | S 11 |
— | — | — | — | — | — | — | — | — | — | — | 10 | — | — | — | 133 | 84 | — | 43 | 191 | 151 | |
Wind waves Height (m) Direction Period (s) | — | — | — | ESE 15 | ESE 15 | ESE 16 | ESE 15 | ESE 11 | ESE 11 | ESE 10 | ESE 10 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 8 | ESE 8 | ESE 8 | SE 8 | E 7 | — |
— | — | — | 17356 | 20372 | 18448 | 15796 | 3998 | 3554 | 2679 | 2810 | 1819 | 1496 | 1481 | 1640 | 1388 | 1141 | 1056 | 653 | 111 | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 288 | 842 | 288 | 361 | 791 | 288 | 803 | 791 | 791 | 803 | 803 | 283 | 791 | 791 | 837 | 699 | 1223 | 283 | 283 | 232 | 202 |
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.











