Surf Forecasts:
Aoshima Harbour surf forecast from 27 Jul 2026:
- Best quality surf: Monday 3 Aug, 6PM (local time) - 5ft (1.6m), 16s period, ESE swell with glassy winds.
- Most powerful swell: Monday 3 Aug, 9PM (local time) - 5.5ft (1.7m), 16s period, ESE swell with 1,375 kJ wave energy.
- Next surfable swell (1★+): Tuesday 28 Jul, 12AM (local time) - 1.5ft (0.5m), 10s 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 Tuesday (Jul 28) at 12AM. The primary swell is predicted to be 0.5m and 10s period with a secondary swell of 0.5m and 8s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Aoshima Harbour in the next 16 days are 1.7m 16s and forecast to arrive on Monday (Aug 03) at 9PM. Winds are predicted to be glassy at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.0m 5s period and expected on Tuesday (Jul 28) at 9PM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12AM (Tue 28th Jul) | 1.5ft (0.5m) 10s |
| Best Surf | 6PM (Mon 3rd Aug) | 5ft (1.6m) 16s |
| Most Powerful | 9PM (Mon 3rd Aug) | 5.5ft (1.7m) 16s |
Table - best surf conditions forecast for Aoshima Harbour over the next 16 days.
The Lowdown
Alright, this is Rusty, and I’m looking at the next couple of weeks for Aoshima Harbour. Honestly, the first week is a bit of a write-off. We’ve got a long, flat spell with nothing worth paddling out for. The energy is just too weak, with combined swell readings barely hitting triple digits (127) on the 27th July, and then dropping into the 20s and 30s as we head into early August. It’s small, messy, and the wind is all over the shop. You’re looking at a solid 5 to 6 day gap with no real surf on offer.
The first real glimmer of hope shows up on the 2nd of August. That Sunday afternoon, we see a pulse of 2ft of ESE swell with a period of 13 seconds. The combined energy jumps to 215, which is still weak, but it’s a start. The wind is light cross-shore, so it’s not all bad, but conditions are still marginal.
Now, the standout window is from the 3rd of August Monday morning through to the 5th of August Wednesday morning. The swell builds nicely, hitting 4ft on Monday morning, then 5ft Monday afternoon, and peaking around 7ft to 10ft on Tuesday and Wednesday. The period is a dreamy 15 to 18 seconds, so it’s proper groundswell with serious energy. The combined energy readings are massive: 652 on Monday morning, then 981, 2392, and a whopping 5131 by Wednesday morning. That’s moderate to strong energy. The wind is light cross-onshore through most of this, but the early mornings are glassy with slight air. The water temperature is a warm 84° and is about normal for this time of year.
The catch is, for Wednesday and Thursday, the swell gets too big for this spot. By Wednesday morning, it’s 10ft, and by Thursday it’s 12ft to 13ft, which is only for experts. The forecast says it's too big for this break. That means the best bet is Tuesday morning, the 4th of August, with 7ft of ESE swell. That’s solid, powerful, and with a light cross-onshore wind, it’ll be lumpy but doable. The swell direction is from the ESE, which is not the optimum SE direction, but with that long period, it will still wrap in nicely at this beach/jetty setup. Crowds are possible here, so get in early.
By the second week, from the 9th onwards, the swell drops, but the winds turn clean. The 11th August Tuesday morning is a highlight: 6ft of E swell, 14-second period, with a clean cross-offshore breeze from the SSW. That’s excellent for experienced surfers. The combined energy is still strong at 1249. That’s a day to circle.
So, to sum it up: the first week is a dud, then a big pulse of long-period groundswell hits from the 3rd to the 5th of August, with Tuesday the 4th being the sweet spot before it gets too big. The second week cleans up nicely, with the 11th of August offering a solid, clean day for the more experienced crew.
Rusty.
Short Range ForecastLight rain (total 5mm), mostly falling on Mon afternoon. Warm (max 33°C on Tue afternoon, min 26°C on Mon afternoon). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 32°C on Thu afternoon, min 26°C on Thu night). Wind will be generally light. | |||||||||||||||||||
Mon 27 | Tuesday 28 | Wednesday 29 | Thursday 30 | Friday 31 | Saturday 1 | Sunday 2 | ||||||||||||||
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 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 11 | ESE 11 | ESE 18 | ESE 13 | ESE 16 |
Wave Graph  | ||||||||||||||||||||
 kJ | 57 | 57 | 56 | 55 | 56 | 56 | 56 | 55 | 37 | 36 | 34 | 28 | 28 | 28 | 17 | 47 | 47 | 31 | 137 | 411 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-off | glassy | cross | cross-off | glassy | cross-on | cross-off | glassy | cross | cross-off | glassy | cross | cross-off | glassy | cross | cross-off | on | cross | glassy |
High Tide | 5:58PM2.00m | 4:38AM2.01m | 6:31PM2.08m | 5:24AM2.09m | 7:00PM2.12m | 6:07AM2.14m | 7:28PM2.14m | 6:47AM2.16m | 7:56PM2.14m | 7:28AM2.14m | 8:23PM2.12m | 8:09AM2.07m | 8:51PM2.09m | |||||||
Low Tide | 11:19PM1.24m | 11:35AM0.14m | 11:58PM1.14m | 12:13PM0.10m | 00:33AM1.03m | 12:49PM0.12m | 1:07AM0.93m | 1:23PM0.19m | 1:42AM0.84m | 1:56PM0.30m | 2:17AM0.78m | 2:29PM0.46m | 2:55AM0.73m | |||||||
 |  |  |  |  | | |  | | |  | | | | | | | | | | |
 | — | — | 5:26 | — | — | 5:26 | — | — | 5:26 | — | — | 5:28 | — | — | 5:28 | — | — | 5:28 | — | — |
 | 7:14 | — | — | 7:14 | — | — | 7:13 | — | — | 7:12 | — | — | 7:12 | — | — | 7:10 | — | — | 7:09 | — |
mm | 3 | 1 | — | — | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 31 | 26 | 31 | 33 | 29 | 31 | 32 | 29 | 32 | 32 | 29 | 31 | 31 | 29 | 30 | 31 | 29 | 30 | 30 | 29 |
Feels °C | 34 | 27 | 34 | 36 | 33 | 34 | 35 | 33 | 35 | 35 | 33 | 33 | 34 | 34 | 33 | 34 | 34 | 33 | 33 | 34 |
Swell 1 Height (m) Direction Period (s) | S 8 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 11 | ESE 11 | ESE 11 | ESE 13 | ESE 16 |
| kJ | 51 | 57 | 56 | 55 | 56 | 56 | 56 | 55 | 37 | 36 | 34 | 28 | 28 | 28 | 17 | 47 | 47 | 23 | 137 | 411 |
Swell 2 Height (m) Direction Period (s) | ESE 10 | S 8 | S 8 | S 8 | SSW 5 | S 8 | S 8 | S 7 | S 7 | S 7 | — | S 7 | S 7 | S 4 | E 12 | E 18 | E 18 | ESE 8 | ESE 17 | S 8 |
| kJ | 57 | 36 | 32 | 21 | 8 | 10 | 10 | 10 | 4 | 4 | — | 1 | 1 | 1 | 3 | 6 | 25 | 14 | 58 | 1 |
Swell 3 Height (m) Direction Period (s) | ESE 14 | S 3 | SE 14 | ESE 13 | S 8 | ESE 13 | SE 13 | E 14 | E 13 | E 15 | — | E 12 | NE 4 | S 7 | E 19 | E 15 | E 15 | ESE 18 | E 16 | ENE 16 |
| kJ | 19 | 2 | 7 | 17 | 11 | 17 | 7 | 4 | 3 | 4 | — | 3 | 1 | 1 | 7 | 4 | 4 | 31 | 20 | 85 |
Wind waves Height (m) Direction Period (s) | — | SSW 4 | SW 4 | SSW 3 | — | — | S 2 | — | WSW 4 | — | NNE 3 | — | — | — | — | — | — | — | — | — |
| kJ | — | 7 | 3 | 2 | — | — | 1 | — | 1 | — | 1 | — | — | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 118 | 0 | 0 | 118 | 0 | 0 | 22 | 0 | 1 | 41 | 65 | 312 | 797 | 883 | 2341 | 905 | 0 | 19 | 118 | 0 |
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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