Surf Forecasts:
Aoshima surf forecast from 22 Aug 2026:
- Best quality surf: Friday 28 Aug, 3AM (local time) - 7ft (2.1m), 9s period, SE swell with glassy winds.
- Most powerful swell: Wednesday 26 Aug, 3AM (local time) - 15ft (4.5m), 15s period, SE swell with 8,402 kJ wave energy.
- Next surfable swell (1★+): Sunday 23 Aug, 9PM (local time) - 2.5ft (0.7m), 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 23) at 9PM. The primary swell is predicted to be 0.7m and 10s period with a secondary swell of 0.4m and 13s. Another secondary swell of 0.5m and 5s is also forecast. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Aoshima in the next 16 days are 4.5m 15s and forecast to arrive on Wednesday (Aug 26) at 3AM. 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+) | 9PM (Sun 23rd Aug) | 2.5ft (0.7m) 10s |
| Best Surf | 3AM (Fri 28th Aug) | 7ft (2.1m) 9s |
| Most Powerful | 3AM (Wed 26th Aug) | 15ft (4.5m) 15s |
Table - best surf conditions forecast for Aoshima over the next 16 days.
The Lowdown
Alright folks, Rusty here for the Imperial version. Let’s break down what’s in store for Aoshima.
We’re looking at a rough start. The first week is mostly a loss for decent surf. The swell is either tiny, or it’s getting hammered by onshore winds, making it a choppy, blown-out mess. There’s some serious energy in the water from the 24th of August, with combined swell energy hitting 1644 (moderate) and then jumping to 7988 (strong) on the 25th, but it’s all onshore wind. A beach set-up like this would be more interesting for kite surfing than a proper paddle session. The water temperature is 84°F, which is about average for this time of year.
We’ve got a long gap of poor to marginal conditions until a real highlight shows up. The standout session is the morning of Saturday, the 29th of August. The swell is 6ft from the SSE, with a period of 9 seconds. That’s a decent short-period swell, but the big story is the wind. It’s glassy – dead calm. “Expect very good surf conditions” for that morning. This is the best on offer. The waves will be clean and lined up, perfect for a beginner-friendly reef.
After that, the Sunday morning of the 30th of August has another glassy session, but with a much smaller 3ft swell from the SE and a weak 7-second period, so it’ll be a lot weaker. The following week from the 31st of August gets messy again with onshore winds and stormy conditions, and by the 5th of September, we’re seeing a severe gale from the SE with 50 mph winds – a total no-go.
So, to sum it up: the first week is a bust. The absolute best is the glassy morning of Saturday, the 29th of August. Get out there early for the cleanest waves. The Sunday morning after that is a smaller option, but the rest of the forecast is a write-off with strong winds and poor conditions.
Rusty.
Short Range ForecastHeavy rain (total 33mm), heaviest during Tue night. Warm (max 28°C on Sun morning, min 26°C on Sun night). Wind will be generally light. | Days 4-6 Weather SummaryHeavy rain (total 77mm), heaviest during Wed morning. Warm (max 29°C on Fri afternoon, min 26°C on Thu night). Wind will be generally light. | ||||||||||||||||||||
Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | Friday 28 | Saturday 29 | |||||||||||||||
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 10 | E 10 | ESE 12 | ESE 13 | ESE 16 | ESE 16 | SE 16 | SE 16 | SE 15 | SE 14 | SE 13 | SSE 11 | SE 9 | SE 8 | SSE 9 | SE 9 | SE 9 | SE 9 | SSE 9 | SE 8 | SSE 8 |
Wave Graph  | |||||||||||||||||||||
 kJ | 102 | 106 | 138 | 346 | 1566 | 4703 | 7858 | 7568 | 7523 | 6783 | 4377 | 1034 | 885 | 517 | 827 | 537 | 470 | 429 | 440 | 281 | 154 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-on | on | on | cross-on | on | cross-on | on | cross-on | cross-on | on | cross-on | cross-on | cross-on | on | cross-on | glassy | glassy | cross-on | glassy |
High Tide | 4:30PM1.80m | 2:33AM1.77m | 5:05PM1.93m | 3:44AM1.89m | 5:34PM2.03m | 4:36AM2.02m | 6:00PM2.11m | 5:21AM2.13m | 6:25PM2.16m | 6:01AM2.21m | 6:50PM2.18m | 6:40AM2.24m | 7:14PM2.19m | ||||||||
Low Tide | 9:39PM1.43m | 9:52AM0.46m | 10:31PM1.29m | 10:39AM0.34m | 11:08PM1.13m | 11:19AM0.27m | 11:41PM0.97m | 11:55AM0.25m | 00:12AM0.81m | 12:28PM0.27m | 00:42AM0.68m | 12:59PM0.35m | 1:14AM0.58m | ||||||||
 | |  | | |  |  |  |  | | | | | | | | | | | | | |
 | 5:43 | — | — | 5:43 | — | — | 5:43 | — | — | 5:45 | — | — | 5:45 | — | — | 5:46 | — | — | 5:47 | — | — |
 | — | 6:50 | — | — | 6:47 | — | — | 6:46 | — | — | 6:45 | — | — | 6:45 | — | — | 6:44 | — | — | 6:43 | — |
mm | — | — | — | — | — | — | — | 2 | 31 | 17 | 13 | 11 | 9 | 9 | 12 | 6 | — | — | — | — | — |
Temp °C | 28 | 28 | 27 | 28 | 28 | 27 | 27 | 28 | 28 | 28 | 28 | 27 | 28 | 28 | 27 | 28 | 29 | 28 | 28 | 29 | 27 |
Feels °C | 31 | 31 | 32 | 30 | 31 | 31 | 27 | 29 | 30 | 30 | 30 | 29 | 32 | 32 | 32 | 33 | 33 | 34 | 32 | 33 | 32 |
Swell 1 Height (m) Direction Period (s) | ESE 10 | E 10 | E 10 | ESE 13 | ESE 16 | ESE 16 | SE 16 | SE 16 | SE 15 | SE 14 | SE 13 | SSE 11 | SE 9 | SE 8 | SE 8 | SE 9 | SE 9 | SE 9 | SSE 9 | SE 8 | SSE 8 |
| kJ | 102 | 106 | 96 | 346 | 1566 | 4703 | 7858 | 7568 | 7523 | 6783 | 4377 | 1034 | 885 | 517 | 338 | 537 | 470 | 429 | 440 | 281 | 154 |
Swell 2 Height (m) Direction Period (s) | S 8 | S 8 | ESE 12 | SE 5 | S 8 | ESE 6 | E 12 | E 15 | E 15 | E 13 | E 14 | E 13 | E 12 | SSE 10 | SSE 9 | ESE 11 | E 13 | E 13 | E 12 | E 12 | E 12 |
| kJ | 33 | 21 | 138 | 12 | 4 | 67 | 70 | 157 | 38 | 31 | 57 | 80 | 47 | 120 | 211 | 38 | 87 | 119 | 105 | 103 | 98 |
Swell 3 Height (m) Direction Period (s) | E 13 | ESE 13 | S 8 | E 10 | E 12 | E 12 | E 16 | E 15 | — | ENE 11 | — | E 18 | E 16 | E 12 | E 12 | E 14 | E 10 | SW 12 | SSW 11 | E 13 | E 11 |
| kJ | 29 | 35 | 20 | 46 | 47 | 141 | 44 | 68 | — | 23 | — | 6 | 5 | 70 | 45 | 60 | 31 | 22 | 12 | 4 | 2 |
Wind waves Height (m) Direction Period (s) | ESE 4 | SE 5 | — | — | SE 5 | — | ENE 9 | — | — | — | — | ESE 9 | — | — | SSE 9 | — | — | — | — | — | — |
| kJ | 13 | 11 | — | — | 27 | — | 16 | — | — | — | — | 830 | — | — | 827 | — | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 48 | 50 | 38 | 68 | 330 | 48 | 202 | 330 | 288 | 202 | 202 | 51 | 202 | 48 | 38 | 202 | 48 | 0 | 0 | 50 | 0 |
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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