Surf Forecasts:
Aoshima Harbour surf forecast from 8 Aug 2026:
- Best quality surf: Monday 10 Aug, 9PM (local time) - 4ft (1.2m), 12s period, E swell with glassy winds.
- Most powerful swell: Sunday 9 Aug, 6PM (local time) - 7ft (2.1m), 14s period, ESE swell with 1,680 kJ wave energy.
- Next surfable swell (1★+): Monday 10 Aug, 9PM (local time) - 4ft (1.2m), 12s period with E swell.
Best Forecast Surf Conditions for Aoshima Harbour this week:
The surf forecast for Aoshima Harbour over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Monday (Aug 10) at 9PM. The primary swell is predicted to be 1.2m and 12s period with a secondary swell of 1.1m and 10s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Aoshima Harbour in the next 16 days are 2.1m 14s and forecast to arrive on Sunday (Aug 09) at 6PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.6m 6s period and expected on Thursday (Aug 13) at 6PM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9PM (Mon 10th Aug) | 4ft (1.2m) 12s |
| Best Surf | 9PM (Mon 10th Aug) | 4ft (1.2m) 12s |
| Most Powerful | 6PM (Sun 9th Aug) | 7ft (2.1m) 14s |
Table - best surf conditions forecast for Aoshima Harbour over the next 16 days.
The Lowdown
Imperial Version
Alright, listen up. It’s Rusty here. The next couple of weeks are looking pretty average for Aoshima Harbour, so let’s not beat around the bush. We’ve got a bit of a slow grind ahead, but there are a couple of windows where it might just turn on.
The first few days are a write-off, to be honest. Saturday the 8th has some solid 10ft swell, but it’s a stormy, lumpy mess with an onshore wind. The energy is strong (2070), but it’s not doing us any favors. Sunday the 9th and Monday the 10th see the swell drop, but the wind stays on it, and the periods are short and crumbly. Not worth paddling out for.
We hit a real flat spot mid-week, from the 12th through to the 14th. The swell drops right off, and the energy is weak. It’s just a waiting game. The good news is, the water is sitting right around 84° with a normal temp anomaly, so you won’t need a hood.
Then things finally start to look up. On the morning of Sunday the 16th, we get a nice clean 6ft east swell with an 11-second period, and the wind is glassy. That’s the standout. The energy is decent (858), and it should be clean and lined up. It’s still a beach/jetty setup, so the long period might make it a bit straight, but with the conditions, it’s your best bet. The following morning, Monday the 17th, is similar – 5ft and glassy. Very promising.
There’s a couple of smaller, clean mornings on the 18th, but the afternoons get chopped. The long-range stuff, like the 23rd, looks clean but tiny. So, if you can, get on it early on the 16th or 17th. That’s the pick of the fortnight.
That’s the word from the beach.
Rusty.
Short Range ForecastModerate rain (total 18mm), heaviest on Sat night. Warm (max 28°C on Sun morning, min 25°C on Mon night). Winds decreasing (fresh winds from the E on Sat afternoon, calm by Mon night). | Days 5-7 Weather SummarySome drizzle, heaviest during Wed night. Warm (max 28°C on Tue afternoon, min 25°C on Tue night). Wind will be generally light. | |||||||||||||||||||
Sat 8 | Sunday 9 | Monday 10 | Tuesday 11 | Wednesday 12 | Thursday 13 | Friday 14 | ||||||||||||||
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 9 | ESE 9 | ESE 8 | E 14 | ESE 14 | E 13 | E 12 | E 12 | E 12 | E 12 | E 11 | E 10 | E 10 | E 10 | SSE 9 | SSE 9 | E 10 | SSE 9 | E 10 | E 9 |
Wave Graph  | ||||||||||||||||||||
 kJ | 1562 | 912 | 559 | 1095 | 1122 | 771 | 513 | 416 | 407 | 325 | 189 | 164 | 164 | 102 | 86 | 84 | 44 | 44 | 68 | 87 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | cross-on | on | on | on | on | on | glassy | glassy | cross | cross-off | on | cross-on | glassy | on | cross-on | cross-on | on | on | cross |
High Tide | 4:09PM1.71m | 1:55AM1.79m | 4:58PM1.85m | 3:13AM1.86m | 5:33PM1.97m | 4:12AM1.96m | 6:03PM2.06m | 5:01AM2.07m | 6:31PM2.13m | 5:44AM2.15m | 6:57PM2.16m | 6:25AM2.20m | 7:23PM2.17m | |||||||
Low Tide | 8:51PM1.47m | 9:33AM0.47m | 10:08PM1.38m | 10:25AM0.34m | 10:56PM1.27m | 11:09AM0.24m | 11:33PM1.13m | 11:47AM0.18m | 00:07AM1.00m | 12:23PM0.17m | 00:39AM0.87m | 12:56PM0.22m | 1:12AM0.76m | |||||||
 |  |  | |  |  | | |  | |  | | |  | | | | | | | |
 | — | — | 5:33 | — | — | 5:35 | — | — | 5:35 | — | — | 5:35 | — | — | 5:37 | — | — | 5:37 | — | — |
 | 7:05 | — | — | 7:04 | — | — | 7:02 | — | — | 7:01 | — | — | 7:00 | — | — | 7:00 | — | — | 6:59 | — |
mm | 5 | 13 | — | — | — | — | — | — | — | — | — | — | — | 1 | — | — | — | — | — | — |
Temp °C | 27 | 27 | 28 | 28 | 27 | 28 | 28 | 27 | 28 | 28 | 26 | 27 | 27 | 25 | 27 | 28 | 26 | 28 | 28 | 26 |
Feels °C | 27 | 27 | 29 | 29 | 31 | 31 | 31 | 32 | 31 | 30 | 29 | 29 | 28 | 29 | 30 | 30 | 28 | 29 | 30 | 29 |
Swell 1 Height (m) Direction Period (s) | SSE 11 | S 11 | ESE 8 | ESE 8 | ESE 14 | E 13 | E 12 | E 12 | E 12 | E 12 | E 11 | E 10 | E 10 | S 9 | SSE 9 | SSE 9 | S 6 | SSE 6 | SSE 6 | E 9 |
| kJ | 486 | 418 | 559 | 555 | 1122 | 771 | 513 | 416 | 407 | 325 | 189 | 164 | 164 | 85 | 86 | 84 | 24 | 39 | 44 | 87 |
Swell 2 Height (m) Direction Period (s) | E 15 | E 15 | S 11 | S 11 | S 10 | SSE 10 | SSE 10 | SSE 10 | S 10 | SSE 10 | SSE 10 | SSE 10 | SSE 10 | E 10 | E 10 | E 10 | S 9 | SSE 9 | E 10 | S 8 |
| kJ | 17 | 38 | 235 | 188 | 250 | 255 | 281 | 218 | 216 | 173 | 177 | 133 | 131 | 102 | 50 | 48 | 40 | 44 | 68 | 49 |
Swell 3 Height (m) Direction Period (s) | E 17 | SE 16 | E 14 | SE 15 | ESE 15 | ESE 14 | SW 11 | ESE 14 | SE 13 | ESE 13 | ESE 13 | ENE 12 | ESE 13 | ESE 12 | ESE 12 | ESE 12 | E 10 | E 9 | SSE 8 | SE 10 |
| kJ | 5 | 10 | 106 | 9 | 21 | 20 | 20 | 19 | 7 | 17 | 17 | 87 | 16 | 15 | 14 | 14 | 44 | 41 | 24 | 51 |
Wind waves Height (m) Direction Period (s) | ESE 9 | ESE 9 | — | E 14 | ESE 6 | — | — | — | — | — | — | NNE 4 | — | S 3 | — | — | — | — | — | — |
| kJ | 1562 | 912 | — | 1095 | 88 | — | — | — | — | — | — | 2 | — | 1 | — | — | — | — | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 359 | 202 | 202 | 202 | 50 | 50 | 310 | 0 | 0 | 340 | 0 | 39 | 312 | 0 | 49 | 297 | 39 | 52 | 297 | 3 |
Best forecast wave conditions in Kyu Shu | ||||||||||||||||||||
Best forecast wave conditions in Japan | ||||||||||||||||||||
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Information about the Aoshima Harbour Surf forecast
The above surf forecast table for Aoshima Harbour provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Aoshima Harbour can be found by selecting the local surf guide option on the grey menu. Our Aoshima Harbour 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 Harbour) 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 Harbour 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 Harbour is 15 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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