Surf Forecasts:
Aoshima Harbour surf forecast from 11 Sep 2026:
- Best quality surf: Monday 14 Sep, 9PM (local time) - 4ft (1.2m), 9s period, ESE swell with glassy winds.
- Most powerful swell: Tuesday 15 Sep, 12PM (local time) - 4.5ft (1.4m), 9s period, ESE swell with 300 kJ wave energy.
- Next surfable swell (1★+): Monday 14 Sep, 9PM (local time) - 4ft (1.2m), 9s period with ESE 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 (Sep 14) at 9PM. The primary swell is predicted to be 1.2m and 9s period with a secondary swell of 0.5m and 12s. 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 1.4m 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+) | 9PM (Mon 14th Sep) | 4ft (1.2m) 9s |
| Best Surf | 9PM (Mon 14th Sep) | 4ft (1.2m) 9s |
| Most Powerful | 12PM (Tue 15th Sep) | 4.5ft (1.4m) 9s |
Table - best surf conditions forecast for Aoshima Harbour over the next 16 days.
The Lowdown
G’day, it’s Rusty here.
Look, I’m going to be straight with you—this stretch of coast is looking pretty grim for the next couple of weeks. We’ve got a long, flat, and messy run ahead. The first real chance of anything decent won’t show up until late in the game, and even then, it’s not for the faint-hearted.
The outlook starts at Aoshima Harbour, and honestly, the first week is a write-off. From Friday the 11th right through to Thursday the 17th, we’re looking at tiny, weak swells—nothing over 4ft—with cross-onshore winds messing things up. The water temp is sitting at 82°, which is right on the mark for this time of year, so no surprises there. But the waves? Forget it. It’s all knee to waist-high slop with short, weak periods. You’d be better off doing anything else.
There’s a small window on the 19th and 20th where the swell jumps up—we’re talking 10ft to 16ft—but the wind is howling onshore and it’s lumpy chaos. That’s not surfable; that’s a washing machine. And way too big for this spot anyway.
Now, here’s where it gets interesting. On Monday the 21st, the swell is still chunky at 11ft, but the wind finally eases. The call is that it’s just too big for Aoshima Harbour—it’s a beach/jetty setup, and when it’s pushing that hard, it’s just a closeout mess. Not for beginners, that’s for sure, and even for the experienced crew, it’s a handful.
Then the wind goes nuts from the 22nd to the 24th—near gale to storm force—and the surf drops back down. That's a hard pass.
But hold on. The last day of the forecast, Saturday the 26th, is the one to circle. We’ve got a clean 8ft swell from the ESE with a 12-second period, and the wind is glassy in the morning. That’s the standout. The combined energy is strong, and that’s the kind of power that gets the heart pumping. It’s going to be a proper groundswell, and it’s breaking with some serious push. The only catch is, at 8ft, it’s expert territory only. This is the one. If you’re an experienced surfer and can read a fast, critical wave, Saturday morning the 26th at Aoshima Harbour is your shot. The afternoon gets a bit cross-onshore, so get on it early.
So, the long story short: a whole lot of nothing, one huge blown-out pulse, and then a single, clean, powerful morning on the 26th. That’s the pick. Mark your calendar.
Rusty.
Short Range ForecastLight rain (total 3mm), mostly falling on Fri afternoon. Warm (max 27°C on Sun morning, min 25°C on Fri morning). Wind will be generally light. | Days 4-6 Weather SummaryModerate rain (total 15mm), heaviest on Tue morning. Warm (max 27°C on Mon morning, min 24°C on Mon night). Wind will be generally light. | ||||||||||||||||||||
Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | |||||||||||||||
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) | SE 7 | SE 8 | SE 7 | E 14 | E 14 | E 14 | ESE 14 | E 13 | ESE 9 | ESE 8 | ESE 8 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 8 |
Wave Graph  | |||||||||||||||||||||
 kJ | 91 | 145 | 73 | 99 | 96 | 134 | 250 | 128 | 126 | 190 | 164 | 218 | 274 | 266 | 248 | 173 | 169 | 158 | 131 | 123 | 96 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | on | cross-on | cross-on | on | cross | cross-on | on | cross-on | cross-on | on | glassy | cross-on | cross-on | cross | cross-on | on | cross | cross-on | on | cross-on |
High Tide | 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 | 8:53AM1.96m | 8:20PM2.06m | 9:44AM1.80m | 8:48PM1.96m | ||||||||
Low Tide | 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 | 2:29PM0.98m | 3:06AM0.45m | 3:00PM1.17m | ||||||||
 |  |  |  | |  | | | | | | |  | | |  | | | | |  | |
 | 5:54 | — | — | 5:54 | — | — | 5:56 | — | — | 5:56 | — | — | 5:56 | — | — | 5:58 | — | — | 5:58 | — | — |
 | — | 6:25 | — | — | 6:24 | — | — | 6:22 | — | — | 6:22 | — | — | 6:21 | — | — | 6:19 | — | — | 6:17 | — |
mm | — | 1 | — | — | — | 2 | — | — | — | — | — | 4 | 3 | 1 | 2 | 1 | 3 | 1 | 1 | 1 | — |
Temp °C | 26 | 26 | 26 | 26 | 26 | 26 | 27 | 27 | 26 | 27 | 27 | 26 | 24 | 25 | 24 | 25 | 26 | 25 | 26 | 26 | 25 |
Feels °C | 29 | 29 | 30 | 29 | 29 | 31 | 30 | 30 | 30 | 30 | 30 | 31 | 27 | 29 | 27 | 28 | 29 | 29 | 29 | 29 | 28 |
Swell 1 Height (m) Direction Period (s) | SE 7 | SE 8 | SE 7 | SSE 7 | E 14 | E 14 | ESE 14 | ESE 9 | ESE 9 | ESE 8 | ESE 8 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 8 |
| kJ | 91 | 145 | 73 | 40 | 96 | 134 | 250 | 61 | 119 | 190 | 164 | 218 | 274 | 266 | 248 | 173 | 169 | 158 | 131 | 123 | 96 |
Swell 2 Height (m) Direction Period (s) | ENE 6 | ENE 6 | ENE 8 | E 14 | SE 6 | ESE 10 | SSE 6 | E 13 | E 13 | E 13 | E 13 | E 12 | E 12 | E 14 | E 15 | E 14 | E 14 | E 13 | E 13 | E 12 | E 12 |
| kJ | 33 | 24 | 32 | 99 | 20 | 31 | 13 | 128 | 126 | 84 | 83 | 74 | 73 | 66 | 74 | 142 | 144 | 121 | 84 | 75 | 44 |
Swell 3 Height (m) Direction Period (s) | E 15 | E 15 | E 14 | ENE 7 | E 10 | SE 6 | ENE 5 | S 6 | S 6 | S 7 | S 7 | E 16 | S 6 | S 7 | E 13 | S 7 | S 7 | S 6 | S 6 | S 6 | SSE 9 |
| kJ | 69 | 74 | 62 | 18 | 30 | 9 | 5 | 7 | 3 | 4 | 1 | 21 | 1 | 1 | 14 | 1 | 1 | 1 | 1 | 1 | 7 |
Wind waves Height (m) Direction Period (s) | ENE 6 | — | — | NE 4 | ENE 4 | ENE 5 | — | ENE 6 | — | — | — | — | — | — | NNE 2 | NE 3 | — | — | NNE 3 | — | — |
| kJ | 53 | — | — | 16 | 8 | 11 | — | 6 | — | — | — | — | — | — | 1 | 2 | — | — | 3 | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 22 | 49 | 19 | 22 | 49 | 3 | 19 | 49 | 39 | 19 | 49 | 0 | 19 | 39 | 3 | 19 | 49 | 19 | 19 | 49 | 23 |
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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