Surf Forecasts:
Aja surf forecast from 18 Aug 2026:
- Best quality surf: Friday 21 Aug, 12PM (local time) - 3ft (0.9m), 7s period, E swell with cross-offshore winds.
- Most powerful swell: Wednesday 19 Aug, 12PM (local time) - 6ft (1.9m), 7s period, E swell with 345 kJ wave energy.
- Next surfable swell (1★+): Friday 21 Aug, 12PM (local time) - 3ft (0.9m), 7s period with E swell.
Best Forecast Surf Conditions for Aja this week:
The surf forecast for Aja over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Friday (Aug 21) at 12PM. The primary swell is predicted to be 0.9m and 7s period. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Aja in the next 16 days are 1.9m 7s and forecast to arrive on Wednesday (Aug 19) at 12PM. 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 3PM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12PM (Fri 21st Aug) | 3ft (0.9m) 7s |
| Best Surf | 12PM (Fri 21st Aug) | 3ft (0.9m) 7s |
| Most Powerful | 12PM (Wed 19th Aug) | 6ft (1.9m) 7s |
Table - best surf conditions forecast for Aja over the next 16 days.
The Lowdown
Alright, Rusty here again. Let’s break down the surf at Aja for the next couple of weeks.
First off, it’s a slow start. We’ve got a solid 7-day stretch of nothing worth riding from now until the 25th of August. The swell is either flat, tiny, or just plain messy. Most days have 0.2ft to 1ft of short-period windswell (6-8 seconds) with cross-off or cross winds. The energy readings are mostly in the single or double digits – weak stuff. The water temp is 84°F, which is about normal for this time of year.
Things pick up a little on the 25th. A 0.8ft pulse from the east-northeast with a 10-second period shows up, giving us a moderate 128 energy reading. The wind is a gentle cross-shore, so it’ll be a bit bumpy, but it’s something. The 27th afternoon brings a big change: a 3ft east swell with a very long 16-second period, and energy jumps to 3971. That’s a powerful groundswell, but the wind is onshore from the northwest. On a reef, that long period can be a good thing, but the onshore wind will mess it up. It’s only for the experienced guys.
The real standout is the 31st of August into the 1st of September. On the 31st, we’ve got a 7ft to 8ft east-northeast to east swell with a 14-second period. The energy is massive – 20,105 to 23,073. And the wind? Dead calm, glassy as a mirror. But here’s the thing: that’s way too big for Aja. It’s a reef, and 7ft+ is a monster. The guidance says it’s too big for the break. This is only for hardcore experts, and even then, it’s super dangerous. The crowd is possible here, but at that size, only the brave will be out.
Then it goes quiet for a day or two before the 2nd of September throws another huge pulse: 8ft to 9ft from the west to west-northwest, with periods of 12-13 seconds and energy hitting 15,112 to 24,487. The wind is cross-onshore, which is a shame, but the size is insane. Same story – expert territory only, and the break can’t handle it well.
So, bottom line: the first week is a total loss. The best window is the 31st of August morning, with glassy conditions and a massive east swell, but it’s dangerously big for Aja. If you’re a top-tier charger, that’s your shot. For everyone else, maybe look at the 25th-27th for something smaller, but the wind won’t be doing you any favors.
Rusty.
Short Range ForecastHeavy rain (total 55mm), heaviest during Thu night. Warm (max 28°C on Tue afternoon, min 26°C on Thu night). Winds decreasing (fresh winds from the E on Wed night, light winds from the S by Fri morning). | Days 5-7 Weather SummaryHeavy rain (total 187mm), heaviest during Sat night. Warm (max 28°C on Mon morning, min 25°C on Sat afternoon). Winds decreasing (fresh winds from the SW on Fri night, light winds from the WNW by Sat afternoon). | |||||||||||||||||||
Tue 18 | Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | ||||||||||||||
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 6 | E 7 | E 7 | ESE 7 | ESE 8 | ESE 8 | SE 8 | SE 8 | NE 8 | S 9 | ENE 9 | ENE 9 | ENE 9 | ENE 9 | E 14 | E 14 | E 10 | ENE 13 | E 10 | E 10 |
Wave Graph | ||||||||||||||||||||
0 | 229 | 315 | 0 | 0 | 0 | 0 | 0 | 18 | 0 | 8 | 8 | 15 | 16 | 14 | 4 | 7 | 56 | 34 | 31 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | off | off | cross-off | cross-off | cross | cross-on | cross-on | cross-off | off | off | off | cross-off | cross-off | cross-off |
High Tide | 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 | 4:05AM1.75m | 6:09PM1.81m | ||||||||
Low Tide | 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 | 11:20AM0.66m | 11:30PM1.23m | |||||||
— | — | 6:03 | — | — | 6:03 | — | — | 6:03 | — | — | 6:03 | — | — | 6:03 | — | — | 6:05 | — | — | |
7:02 | — | — | 7:01 | — | — | 7:00 | — | — | 7:00 | — | — | 7:00 | — | — | 6:59 | — | — | 6:58 | — | |
mm | — | 2 | 3 | 4 | 3 | 1 | 8 | 20 | 14 | 24 | 16 | 8 | 51 | 80 | 6 | 1 | 1 | — | — | — |
Temp °C | 28 | 28 | 28 | 28 | 28 | 28 | 27 | 27 | 27 | 27 | 27 | 27 | 26 | 26 | 27 | 27 | 27 | 28 | 28 | 27 |
Feels °C | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 30 | 31 | 28 | 27 | 29 | 31 | 27 | 28 | 27 | 27 | 28 | 29 | 28 |
Swell 1 Height (m) Direction Period (s) | SW 8 | SW 8 | SW 8 | SW 8 | SSW 8 | S 10 | SW 9 | S 10 | S 9 | S 9 | E 14 | SW 9 | SW 10 | SW 11 | SW 11 | SW 11 | SW 9 | E 11 | SW 10 | SSW 8 |
34 | 35 | 18 | 10 | 22 | 118 | 12 | 225 | 264 | 286 | 4 | 235 | 392 | 116 | 377 | 249 | 163 | 20 | 59 | 192 | |
Swell 2 Height (m) Direction Period (s) | S 7 | S 7 | S 7 | S 8 | SW 8 | SW 9 | SW 9 | SW 9 | SW 10 | ESE 7 | ENE 9 | ENE 9 | SE 9 | ENE 9 | E 9 | SE 13 | E 10 | E 13 | E 10 | E 10 |
8 | 4 | 4 | 11 | 11 | 12 | 28 | 12 | 17 | 77 | 8 | 8 | 42 | 16 | 6 | 6 | 7 | 14 | 34 | 31 | |
Swell 3 Height (m) Direction Period (s) | SE 10 | SE 10 | — | S 8 | — | — | — | SW 9 | NE 8 | SW 10 | E 14 | E 14 | ENE 9 | E 16 | E 14 | E 14 | ESE 11 | ENE 13 | E 13 | SW 10 |
4 | 4 | — | 1 | — | — | — | 39 | 18 | 133 | 4 | 4 | 15 | 5 | 14 | 4 | 23 | 56 | 14 | 25 | |
Wind waves Height (m) Direction Period (s) | E 6 | E 7 | E 7 | ESE 7 | ESE 8 | ESE 8 | SE 8 | SE 8 | ESE 7 | ESE 7 | S 9 | S 8 | S 9 | S 9 | S 8 | S 9 | SSE 8 | S 8 | SSE 8 | ESE 5 |
139 | 229 | 315 | 345 | 545 | 527 | 1009 | 547 | 243 | 149 | 822 | 1086 | 999 | 1169 | 754 | 1051 | 497 | 593 | 373 | 25 | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 1037 | 15 | 673 | 778 | 590 | 673 | 719 | 590 | 14 | 10 | 590 | 673 | 16 | 598 | 14 | 598 | 598 | 590 | 14 | 14 |
Best forecast wave conditions in Okinawa | ||||||||||||||||||||
Best forecast wave conditions in Japan | ||||||||||||||||||||
Header Global | ||||||||||||||||||||
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)
Wind Speed (km/h)
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.











