
Surf Forecasts:
Aoshima Harbour surf forecast from 21 Jul 2026:
- Best quality surf: Tuesday 21 Jul, 9PM (local time) - 2ft (0.6m), 9s period, E swell with cross-offshore winds.
- Most powerful swell: Wednesday 22 Jul, 9AM (local time) - 2.5ft (0.7m), 11s period, E swell with 108 kJ wave energy.
- Next surfable swell (1★+): Tuesday 21 Jul, 9PM (local time) - 2ft (0.6m), 9s 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 Tuesday (Jul 21) at 9PM. The primary swell is predicted to be 0.6m and 9s period with a secondary swell of 0.3m and 13s. 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 0.7m 11s and forecast to arrive on Wednesday (Jul 22) at 9AM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.6m 3s period and expected on Wednesday (Jul 22) at 12AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9PM (Tue 21st Jul) | 2ft (0.6m) 9s |
| Best Surf | 9PM (Tue 21st Jul) | 2ft (0.6m) 9s |
| Most Powerful | 9AM (Wed 22nd Jul) | 2.5ft (0.7m) 11s |
Table - best surf conditions forecast for Aoshima Harbour over the next 16 days.
The Lowdown
Alright crew, Rusty here. Let’s have a look at what’s cooking for Aoshima Harbour over the next couple of weeks.
Right off the bat, it’s a pretty quiet start. The first few days are offering tiny waves and mostly messy conditions, so you’d be wrestling more with the chop than riding anything fun. The water temp is sitting right on 83°, which is pretty much bang on average for this time of year, so you won’t need any thick rubber.
The first real chance to get a tiny bit of hope comes Thursday morning, the 23rd of July. We’ve got a tiny 2ft of easterly swell, but the wind is glassy, which is a rare treat. The period is 10 seconds, which is alright for a wave that small, and the combined energy is weak (90). It’s not going to set the world on fire, but it’s the cleanest option for a paddle. That same kind of glassy, small wave pattern repeats on Friday morning, Saturday morning, Sunday morning, and into the next week. The early mornings are your only window for a clean but very ordinary wave.
The standout? Honestly, there isn’t a proper standout in the first week. It’s all small, weak, and fickle.
Now, hold on to your board shorts, because things change dramatically in the second week. From the 31st of July, the swell really starts to build, but the wind is a mess. Friday afternoon the 31st has a 3ft easterly swell but with a strong cross-onshore wind, making it choppy. The energy is ramping up to moderate (251).
By Saturday the 1st of August, the swell is pushing 5ft to 5ft from the SE, but with onshore winds up to 19 mph, it’s a total mess. Forget about a clean wave. This is more of a kite-surfing setup than a paddling one.
The real event is Sunday the 2nd of August. The morning has a 7ft swell from the SE with a very long period of 14 seconds and a cross-offshore wind, giving you clean conditions. The combined energy is strong (2054). This is the best window. However, the swell is getting big, so it’s pushing into intermediate territory. The afternoon gets a bit choppy with cross-shore wind, but the morning is your window. This swell is a long-period groundswell, so it might break a bit straight at the beach, but it’ll have plenty of power.
Then it gets a bit silly. Monday the 3rd of August has a 10ft swell from the SE, but the wind is already cross-onshore, making it messy. The energy is very strong (4160), but for a beach/jetty setup, this is big and ugly. After that, the 4th and 5th of August are just massive, stormy, and blown out with 13ft to 15ft swells and strong winds. That’s expert-only territory, and even then, it won’t be pretty.
So, the standout is Sunday morning the 2nd of August. If you’re an experienced surfer, get there early for clean, powerful 7ft SE groundswell. It’s the only time the stars align for size and clean wind. For the rest of the run, you’re either looking at tiny glassy mornings or big, messy, blown-out conditions.
Rusty out.
Short Range ForecastMostly dry. Warm (max 30°C on Tue afternoon, min 27°C on Tue night). Wind will be generally light. | Days 5-7 Weather SummaryLight rain (total 4mm), mostly falling on Fri afternoon. Warm (max 30°C on Fri afternoon, min 26°C on Sun night). Wind will be generally light. | |||||||||||||||||||
Tue 21 | Wednesday 22 | Thursday 23 | Friday 24 | Saturday 25 | Sunday 26 | Monday 27 | ||||||||||||||
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) | E 9 | E 9 | E 11 | E 10 | E 10 | E 10 | E 10 | E 10 | E 10 | E 10 | SE 11 | SE 11 | SE 11 | SE 10 | ESE 10 | SSE 9 | SE 11 | ESE 10 | ESE 10 | S 10 |
Wave Graph | ||||||||||||||||||||
56 | 53 | 108 | 102 | 72 | 71 | 50 | 48 | 48 | 31 | 30 | 30 | 29 | 25 | 39 | 45 | 56 | 59 | 57 | 78 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | off | on | cross-on | off | glassy | cross | cross-off | glassy | cross | cross-off | glassy | cross | glassy | glassy | cross-on | glassy | glassy | cross | off |
High Tide | 10:41PM1.91m | 11:45AM1.58m | 11:25PM1.86m | 1:35PM1.54m | 00:22AM1.82m | 3:27PM1.63m | 1:33AM1.81m | 4:37PM1.77m | 2:44AM1.85m | 5:22PM1.90m | 3:46AM1.93m | 5:58PM2.00m | ||||||||
Low Tide | 4:17PM0.90m | 5:27AM0.77m | 5:06PM1.11m | 6:41AM0.72m | 6:17PM1.29m | 8:00AM0.63m | 8:00PM1.39m | 9:11AM0.49m | 9:32PM1.39m | 10:07AM0.35m | 10:33PM1.33m | 10:54AM0.23m | 11:19PM1.24m | |||||||
— | — | 5:22 | — | — | 5:22 | — | — | 5:24 | — | — | 5:24 | — | — | 5:24 | — | — | 5:24 | — | — | |
7:17 | — | — | 7:16 | — | — | 7:16 | — | — | 7:15 | — | — | 7:15 | — | — | 7:15 | — | — | 7:14 | — | |
mm | — | — | — | — | — | — | — | — | — | 2 | — | — | 1 | — | — | 1 | — | — | — | — |
Temp °C | 30 | 28 | 29 | 29 | 28 | 29 | 30 | 29 | 29 | 30 | 29 | 30 | 30 | 29 | 29 | 29 | 28 | 29 | 29 | 28 |
Feels °C | 32 | 32 | 33 | 34 | 32 | 34 | 33 | 33 | 34 | 34 | 35 | 34 | 33 | 34 | 34 | 33 | 33 | 32 | 31 | 32 |
Swell 1 Height (m) Direction Period (s) | E 9 | E 9 | E 11 | E 10 | E 10 | E 10 | E 10 | E 10 | E 10 | E 10 | E 9 | SE 11 | SE 11 | SE 10 | ESE 10 | SSE 9 | S 8 | S 8 | S 8 | S 10 |
56 | 53 | 108 | 102 | 72 | 71 | 50 | 48 | 48 | 30 | 27 | 30 | 29 | 25 | 39 | 45 | 34 | 49 | 48 | 70 | |
Swell 2 Height (m) Direction Period (s) | E 14 | E 12 | SE 8 | SE 8 | S 7 | S 7 | SE 10 | S 4 | SE 9 | ESE 18 | SE 11 | E 9 | E 9 | SSE 7 | SSE 10 | ESE 10 | SE 11 | ESE 10 | ESE 10 | ESE 10 |
14 | 44 | 2 | 2 | 1 | 4 | 4 | 2 | 12 | 31 | 30 | 26 | 26 | 9 | 31 | 42 | 56 | 59 | 57 | 78 | |
Swell 3 Height (m) Direction Period (s) | SSE 8 | S 3 | — | S 7 | SE 7 | SE 20 | SE 19 | SE 8 | ESE 18 | ESE 9 | ESE 17 | ESE 16 | SSE 7 | E 9 | E 9 | E 9 | E 8 | ESE 14 | ESE 14 | SE 14 |
6 | 2 | — | 1 | 2 | 15 | 15 | 3 | 31 | 8 | 27 | 26 | 11 | 15 | 14 | 13 | 12 | 40 | 19 | 8 | |
Wind waves Height (m) Direction Period (s) | — | SSW 3 | — | — | SSW 3 | — | — | SW 3 | — | S 7 | SW 4 | — | — | — | — | — | SW 4 | — | — | — |
— | 8 | — | — | 1 | — | — | 3 | — | 4 | 4 | — | — | — | — | — | 1 | — | — | — | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 630 | 0 | 3 | 644 | 0 | 0 | 644 | 0 | 0 | 118 | 0 | 0 | 312 | 1 | 0 | 69 | 0 | 0 | 312 | 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.










