Surf Forecasts:
Aja surf forecast from 21 Aug 2026:
- Most powerful swell: Tuesday 25 Aug, 3PM (local time) - 13ft (4.0m), 16s period, E swell with 7,494 kJ wave energy.
Best Forecast Surf Conditions for Aja this week:
The most powerful waves expected at Aja in the next 16 days are 4.0m 16s and forecast to arrive on Tuesday (Aug 25) at 3PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 4.0m 17s period and expected on Tuesday (Aug 25) at 12PM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 3PM (Tue 25th Aug) | 13ft (4.0m) 16s |
Table - best surf conditions forecast for Aja over the next 16 days.
The Lowdown
G'day, I'm Rusty, and I've got a tough one for you today. The outlook for Aja, a reef break, is looking pretty grim for the foreseeable future. This spot is known for being inconsistent, and unfortunately, that's exactly what we're seeing. There's a massive gap in the forecast with no decent surf, so don't get your hopes up for a quick fix.
The water temperature here is sitting at 84°F, which is pretty much bang on average for this time of year, so no surprises there.
Let's start from Friday the 21st of August. We've got a tiny 1ft swell from the ENE with a short 8-second period, and the combined energy is a weak 21. It's basically flat. The wind is a fresh 19 mph cross-off, which cleans things up, but there's nothing to ride. The whole weekend follows the same pattern – tiny to no swell, and while the wind stays offshore, it's too strong to be fun. Expect a strong breeze from the SE on Saturday hitting 25 mph, making it clean but near impossible to paddle into. The 23rd and 24th are completely flat with no swell at all.
Things get a little interesting on Tuesday the 25th of August. The afternoon sees a massive 12ft swell from the E with a very long 16-second period. The combined energy is a whopping 6197, so there's a lot of power in the water. However, this is where the reef break comes into its own – a long-period groundswell like this is best at a reef, so the shape could be good. The wind is a light 9 mph cross-shore, but it's a marginal call. This is a big swell over 8ft, so it's for experts only. The next day, the 26th, the swell is still big at 12ft, but the wind turns cross-onshore from the W, making it choppy and poor. The energy remains strong at 2563, but the conditions are naff.
After that, it's back to poor conditions with a mix of strong onshore winds and small, weak swells. There's a brief window around Thursday the 3rd of September with a small 3ft swell from the E and a 10-second period, and a light breeze, but the conditions are only described as "very ordinary." The energy is a moderate 135, but it's nothing to write home about.
The real highlight, if you can call it that, is on Saturday the 5th of September. The morning brings a clean 5ft swell from the E with a long 14-second period, and guess what? The wind is glassy – a complete 3 mph calm from the N. The combined energy is a strong 855. This is what you're waiting for. The glassy conditions mean the reef will be pristine, and the 5ft swell is a great size for intermediates. The forecast says "expect very good surf conditions," and it's the only standout in the whole 16-day window. The afternoon shifts to a light cross-onshore, so get in early.
To sum it up, you've got a long wait. The only real chance for a decent session is on the morning of Saturday the 5th of September. It's a promising call, but remember, it's a long way out, so keep an eye on the forecasts. The rest of the window is a write-off.
Rusty.
Short Range ForecastModerate rain (total 14mm), heaviest on Fri afternoon. Warm (max 28°C on Sun morning, min 27°C on Fri afternoon). Winds decreasing (strong winds from the SE on Sat morning, moderate winds from the ESE by Sun night). | Days 5-7 Weather SummaryLight rain (total 4mm), mostly falling on Tue afternoon. Warm (max 29°C on Tue morning, min 26°C on Tue night). Winds increasing (light winds from the W on Tue night, fresh winds from the WNW by Thu morning). | |||||||||||||||||||
Fri 21 | Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | Thursday 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) | ENE 8 | ENE 9 | ENE 9 | ENE 9 | S 10 | SSW 10 | SSW 10 | E 9 | SSW 10 | E 11 | ENE 7 | NE 9 | E 16 | E 14 | NE 12 | NNW 11 | NW 11 | W 11 | W 12 | E 16 |
Wave Graph | ||||||||||||||||||||
32 | 15 | 16 | 15 | 0 | 0 | 0 | 14 | 0 | 281 | 77 | 42 | 7494 | 3436 | 576 | 992 | 1092 | 1789 | 2791 | 20 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | off | off | off | off | off | off | cross-off | cross-off | cross-off | cross-off | cross | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | on | on |
High Tide | 00:39AM1.71m | 4:44PM1.56m | 2:33AM1.68m | 5:37PM1.69m | 4:05AM1.75m | 6:09PM1.81m | 5:01AM1.88m | 6:36PM1.91m | 5:43AM2.00m | 7:00PM1.99m | 6:19AM2.10m | 7:23PM2.06m | ||||||||
Low Tide | 6:30PM1.37m | 9:01AM0.87m | 9:01PM1.43m | 10:27AM0.78m | 10:42PM1.35m | 11:20AM0.66m | 11:30PM1.23m | 11:59AM0.54m | 00:05AM1.10m | 12:30PM0.43m | 00:35AM0.96m | 12:59PM0.35m | 1:05AM0.83m | |||||||
— | — | 6:03 | — | — | 6:03 | — | — | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — | |
7:00 | — | — | 7:00 | — | — | 6:59 | — | — | 6:58 | — | — | 6:57 | — | — | 6:55 | — | — | 6:54 | — | |
mm | 3 | 4 | 3 | 3 | — | — | — | — | 1 | — | — | — | 3 | 1 | — | — | — | — | — | 1 |
Temp °C | 27 | 27 | 27 | 27 | 27 | 28 | 28 | 27 | 28 | 28 | 27 | 29 | 29 | 28 | 28 | 29 | 28 | 29 | 28 | 28 |
Feels °C | 27 | 26 | 25 | 26 | 28 | 29 | 29 | 28 | 29 | 29 | 28 | 32 | 33 | 33 | 30 | 32 | 32 | 30 | 29 | 29 |
Swell 1 Height (m) Direction Period (s) | ENE 8 | ENE 9 | ENE 9 | ENE 9 | S 10 | SSW 10 | SSW 10 | SSW 9 | SSW 10 | ESE 17 | ESE 18 | ESE 17 | E 16 | E 14 | NE 12 | NNW 11 | NW 11 | W 11 | ESE 9 | ESE 9 |
32 | 15 | 16 | 15 | 865 | 625 | 625 | 383 | 351 | 2007 | 4233 | 8098 | 7494 | 3436 | 524 | 992 | 1092 | 1789 | 80 | 90 | |
Swell 2 Height (m) Direction Period (s) | SW 10 | ENE 9 | E 14 | E 9 | SE 9 | ESE 14 | ESE 13 | SE 12 | ESE 18 | SSW 10 | SSW 9 | SSW 9 | SSW 9 | SSW 10 | N 9 | ESE 10 | ESE 9 | ESE 8 | E 13 | E 12 |
16 | 8 | 4 | 7 | 23 | 20 | 35 | 38 | 221 | 258 | 151 | 99 | 101 | 151 | 127 | 85 | 46 | 73 | 29 | 12 | |
Swell 3 Height (m) Direction Period (s) | ESE 11 | — | — | E 14 | SE 13 | ESE 14 | ESE 13 | E 9 | SE 13 | — | ENE 7 | — | ESE 20 | — | ESE 12 | E 14 | E 13 | E 13 | E 18 | E 16 |
11 | — | — | 4 | 7 | 41 | 35 | 14 | 80 | — | 77 | — | 38 | — | 137 | 34 | 31 | 29 | 6 | 20 | |
Wind waves Height (m) Direction Period (s) | S 8 | SSE 8 | S 9 | S 9 | — | ESE 5 | ESE 5 | ESE 5 | E 5 | E 11 | E 7 | NE 9 | NNE 5 | NNW 7 | W 8 | SSW 9 | SSW 9 | SSW 9 | W 12 | WSW 12 |
564 | 1231 | 1405 | 1566 | — | 59 | 48 | 43 | 16 | 281 | 70 | 42 | 38 | 240 | 576 | 226 | 327 | 126 | 2791 | 2944 | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 590 | 590 | 590 | 813 | 14 | 673 | 598 | 14 | 761 | 14 | 15 | 16 | 15 | 10 | 10 | 10 | 10 | 10 | 598 | 598 |
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.











