Surf Forecasts:
Aja surf forecast from 17 Aug 2026:
- Most powerful swell: Wednesday 19 Aug, 6AM (local time) - 7ft (2.1m), 7s period, E swell with 452 kJ wave energy.
Best Forecast Surf Conditions for Aja this week:
The most powerful waves expected at Aja in the next 16 days are 2.1m 7s and forecast to arrive on Wednesday (Aug 19) at 6AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 3.0m 8s period and expected on Thursday (Aug 20) at 9AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 6AM (Wed 19th Aug) | 7ft (2.1m) 7s |
Table - best surf conditions forecast for Aja over the next 16 days.
The Lowdown
Right then, let’s have a look at what’s on offer for this stretch of coast. To be honest, it’s a pretty bleak run for the next couple of weeks, with very little to get excited about. The water temp is sitting at 84°, which is pretty much what you’d expect for this time of year, no real surprises there.
The first real chance of a paddle is on Monday, August 17th, at Aja. It’s a reef setup that’s exposed to the north, but it’s inconsistent, so don’t bank on it. You’re looking at a tiny 2ft of easterly swell, with a period of 10 seconds. The combined swell energy is weak, sitting at just 73, so it’s pretty gutless. The wind is a gentle cross-offshore breeze at 9 mph, so it’ll be clean, but the whole picture is very ordinary. It’s really only for the die-hards who just need to get wet. Crowds are possible here.
From Tuesday, August 18th, right through until Saturday, August 22nd, it’s a write-off. No surf to speak of, with poor conditions and building winds, with a risk of thunderstorms. Saturday afternoon sees a tiny 2ft of swell appear, but it’s still poor.
Sunday, August 23rd, shows a little pulse, but still with very poor conditions overall. A 1ft easterly swell at 8 seconds, with a moderate offshore breeze, but it’s not going to deliver anything worth the drive.
The following week, from Monday, August 24th, to Friday, August 28th, is mostly flat, with just small scraps of energy. The wind swings around onshore and picks up, making it choppy and lumpy, so don’t bother.
The only thing that might get your heart rate up is right at the tail end of the forecast. On Monday, August 31st, things get a bit wild. A big 10ft easterly groundswell rolls in, with a very long 15-second period. The combined swell energy is a massive 5121, which is strong and powerful. However, here’s the catch – the wind is a moderate cross-on shore at 12 mph, and the conditions are described as choppy. For a reef break like Aja, a long-period easterly swell can be good, but that cross-on wind will mess it up. This is definitely only for the experts, as it’s too big for anyone else. Given the poor wind, this setup actually looks more interesting for kite surfing than paddle surfing.
To be honest, the pick of a very bad bunch is that Monday morning on August 17th for a tiny, clean wave, but that’s a low bar. The big swell on the 31st is promising only if you’re a charger and can handle lousy wind. Otherwise, this region is looking at a long, flat stretch.
Rusty.
Short Range ForecastHeavy rain (total 20mm), heaviest during Wed night. Warm (max 29°C on Mon morning, min 27°C on Mon night). Winds increasing (light winds from the ESE on Mon morning, strong winds from the ESE by Wed night). | Days 4-6 Weather SummaryHeavy rain (total 44mm), heaviest during Thu night. Warm (max 29°C on Sat morning, min 26°C on Fri night). Winds decreasing (fresh winds from the SE on Thu afternoon, light winds from the SSE by Fri night). | ||||||||||||||||||||
Monday 17 | Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | |||||||||||||||
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) | E 10 | E 10 | E 10 | E 6 | E 6 | E 7 | ESE 8 | ESE 8 | ESE 8 | SE 8 | SE 10 | SE 9 | SE 8 | SE 8 | E 14 | ENE 9 | E 10 | ENE 9 | E 14 | ENE 8 | E 13 |
Wave Graph | |||||||||||||||||||||
73 | 71 | 48 | 0 | 0 | 271 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 4 | 8 | 44 | 15 | 15 | 22 | 14 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | off | cross-off | cross-off | cross-off | cross-off | cross-off | off | off | off | cross-off | off | off | off | cross-off | cross-off | off | off | off | off |
High Tide | 9:54AM1.97m | 10:03PM2.06m | 10:37AM1.81m | 10:29PM1.99m | 11:27AM1.65m | 10:59PM1.91m | 12:36PM1.52m | 11:36PM1.81m | 2:40PM1.47m | 00:39AM1.71m | 4:44PM1.56m | 2:33AM1.68m | 5:37PM1.69m | ||||||||
Low Tide | 3:55PM0.66m | 4:31AM0.64m | 4:23PM0.86m | 5:13AM0.70m | 4:52PM1.04m | 6:04AM0.78m | 5:27PM1.21m | 7:17AM0.86m | 6:30PM1.37m | 9:01AM0.87m | 9:01PM1.43m | 10:27AM0.78m | 10:42PM1.35m | ||||||||
6:01 | — | — | 6:01 | — | — | 6:03 | — | — | 6:03 | — | — | 6:03 | — | — | 6:03 | — | — | 6:03 | — | — | |
— | 7:04 | — | — | 7:02 | — | — | 7:01 | — | — | 7:00 | — | — | 7:00 | — | — | 7:00 | — | — | 6:59 | — | |
mm | — | — | 1 | — | — | 3 | 3 | 2 | 11 | 3 | 5 | 15 | 7 | 4 | 1 | 3 | 3 | 3 | — | — | — |
Temp °C | 29 | 29 | 27 | 28 | 29 | 28 | 28 | 28 | 28 | 28 | 28 | 27 | 27 | 28 | 27 | 29 | 29 | 27 | 28 | 29 | 27 |
Feels °C | 32 | 32 | 30 | 29 | 30 | 29 | 28 | 29 | 27 | 30 | 29 | 29 | 29 | 30 | 30 | 31 | 31 | 30 | 30 | 31 | 30 |
Swell 1 Height (m) Direction Period (s) | SW 8 | SW 8 | SW 9 | SW 8 | SW 8 | SW 8 | SW 8 | SW 8 | SW 8 | SW 9 | SW 9 | SW 9 | SW 9 | SW 10 | S 8 | SW 9 | SW 9 | SW 9 | SW 10 | SW 10 | SW 10 |
74 | 74 | 77 | 35 | 34 | 34 | 18 | 11 | 11 | 14 | 12 | 12 | 14 | 23 | 210 | 64 | 141 | 119 | 106 | 79 | 38 | |
Swell 2 Height (m) Direction Period (s) | E 10 | E 10 | E 10 | S 7 | S 7 | S 7 | S 8 | S 8 | SW 8 | SW 9 | SSW 8 | — | — | E 11 | SW 10 | ENE 9 | SW 10 | SSW 9 | ENE 8 | ENE 8 | E 13 |
73 | 71 | 48 | 9 | 8 | 4 | 5 | 11 | 11 | 13 | 13 | — | — | 59 | 32 | 8 | 90 | 67 | 14 | 22 | 14 | |
Swell 3 Height (m) Direction Period (s) | S 7 | S 7 | S 7 | SE 10 | SSE 10 | SE 10 | S 8 | SSW 8 | S 11 | — | — | — | — | — | E 14 | ENE 9 | E 10 | ENE 9 | E 14 | E 14 | E 10 |
16 | 9 | 9 | 16 | 10 | 4 | 1 | 6 | 10 | — | — | — | — | — | 4 | 8 | 44 | 15 | 15 | 15 | 8 | |
Wind waves Height (m) Direction Period (s) | SE 5 | ESE 5 | ESE 5 | E 6 | E 6 | E 7 | ESE 8 | ESE 8 | ESE 8 | SE 8 | SE 10 | SE 9 | SE 8 | SE 8 | SE 8 | SE 8 | SE 8 | SE 7 | SSE 8 | SSE 8 | SSE 8 |
20 | 16 | 36 | 94 | 112 | 271 | 469 | 356 | 751 | 1202 | 1531 | 1019 | 742 | 953 | 594 | 748 | 532 | 554 | 709 | 579 | 574 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 0 | 14 | 14 | 16 | 607 | 845 | 598 | 590 | 590 | 607 | 607 | 14 | 607 | 14 | 14 | 598 | 590 | 590 | 607 | 14 |
Best forecast wave conditions in Okinawa | |||||||||||||||||||||
Best forecast wave conditions in Japan | |||||||||||||||||||||
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Information about the Aja Surf forecast
The above surf forecast table for Aja provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Aja can be found by selecting the local surf guide option on the grey menu. Our Aja 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 (Aja) 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 Aja 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.
Aja is 4 km (2 miles) from the city of Tomigusuku. If you plan a holiday in Okinawa, look for hotels and other accommodation in Tomigusuku. Tomigusuku has rooms for a wide range of budgets as well as car hire and transport links.











