Surf Forecasts:
Aja surf forecast from 15 Sep 2026:
- Best quality surf: Thursday 17 Sep, 12AM (local time) - 1.5ft (0.5m), 14s period, E swell with cross-offshore winds.
- Most powerful swell: Sunday 20 Sep, 3PM (local time) - 6.5ft (2.0m), 14s period, E swell with 1,559 kJ wave energy.
- Next surfable swell (1★+): Thursday 17 Sep, 12AM (local time) - 1.5ft (0.5m), 14s 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 Thursday (Sep 17) at 12AM. The primary swell is predicted to be 0.5m and 14s period with a secondary swell of 0.5m and 7s. 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 2.0m 14s and forecast to arrive on Sunday (Sep 20) 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 1.0m 9s period and expected on Tuesday (Sep 15) at 9PM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12AM (Thu 17th Sep) | 1.5ft (0.5m) 14s |
| Best Surf | 12AM (Thu 17th Sep) | 1.5ft (0.5m) 14s |
| Most Powerful | 3PM (Sun 20th Sep) | 6.5ft (2.0m) 14s |
Table - best surf conditions forecast for Aja over the next 16 days.
The Lowdown
G’day, Rusty here. Look, I’m not gonna sugarcoat it – we’re staring down a long, painful run of flat or blown-out junk for Aja (Indonesia). The water temp is sitting at a warm 84°, which is about normal for this time of year, so at least a dip won't give you a shock.
Right now and through the rest of this week, it’s pretty much a write-off. We’ve got tiny swell – nothing over 2ft – and that’s being pushed around by cross-shore winds. The energy levels are pathetic, with readings barely creeping into double digits (65). It’s all stormy skies and flat surf. Honestly, you’d be better off staying home.
We head into next week, and things actually get worse before they get any better. By Sunday the 20th, the swell jumps up to 8ft to 10ft, and the combined energy rockets up to over 3800, but don’t get excited. The wind is hammering in cross-onshore at 16-19 mph, turning it into a complete washing machine. On Monday the 21st it’s still big and messy, with fresh cross-onshore winds up to 22 mph. This whole stretch through to the end of next week is just poor conditions with a capital P.
There is one small flicker. On Thursday the 17th, the swell bumps up just a touch to 3ft from the east with a period of 9 seconds, and the energy hits a moderate 205. It’s still only a marginal call with cross-shore breeze. Not worth paddling out for unless you’re desperate.
After that, it’s a total flat spell from the morning of the 26th of September through to the end of the month. Literally zero energy (0) showing – nothing but glassy, flat water and cross-onshore ripples. That’s a solid three- to four-day gap with no surf on offer at all.
The very last gasp is the 29th of September – we see a chunky 10ft to 13ft spike from the ENE with moderate energy (1473 to 2499), but again it’s blown out by moderate cross-onshore winds. Unless you’re a tow-in nut, it’s not surfable.
Honestly, mate, this is a brutal 16-day block. No standouts. Not a single day where the whole picture lines up. Given the constant cross and cross-onshore wind with all the swell pulses, and the break being an exposed reef, this setup is more interesting for kite surfing than paddle surfing for most of it. Keep the boards in the rack – the forecasts might change, but right now there’s nothing worth chasing.
Rusty.
Short Range ForecastModerate rain (total 15mm), heaviest on Tue afternoon. Warm (max 28°C on Tue afternoon, min 26°C on Tue night). Wind will be generally light. | Days 5-7 Weather SummaryLight rain (total 4mm), mostly falling on Fri afternoon. Warm (max 28°C on Fri afternoon, min 26°C on Fri night). Mainly fresh winds. | |||||||||||||||||||
Tue 15 | Wednesday 16 | Thursday 17 | Friday 18 | Saturday 19 | Sunday 20 | Monday 21 | ||||||||||||||
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) | NNW 6 | E 15 | E 14 | E 14 | E 14 | E 14 | E 13 | E 13 | E 9 | E 9 | E 9 | ENE 11 | E 14 | E 13 | E 12 | E 14 | E 13 | E 13 | E 12 | E 12 |
Wave Graph  | ||||||||||||||||||||
 kJ | 21 | 18 | 64 | 58 | 100 | 92 | 84 | 84 | 57 | 54 | 55 | 43 | 136 | 737 | 723 | 1559 | 1391 | 956 | 702 | 365 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross | cross | cross-off | cross | cross | cross | cross-off | cross | cross | cross-on | cross-on | cross | cross-on | cross-on | cross-on | cross-on | on | on |
High Tide | 9:09PM2.08m | 10:07AM1.80m | 9:34PM2.00m | 10:51AM1.66m | 10:01PM1.89m | 11:53AM1.52m | 10:36PM1.77m | 2:05PM1.46m | 11:34PM1.64m | 4:15PM1.55m | 1:57AM1.58m | 4:59PM1.68m | ||||||||
Low Tide | 3:13PM0.79m | 3:47AM0.48m | 3:39PM0.94m | 4:23AM0.58m | 4:06PM1.10m | 5:07AM0.71m | 4:40PM1.25m | 6:13AM0.84m | 5:44PM1.38m | 8:09AM0.90m | 8:53PM1.41m | 9:50AM0.83m | 10:23PM1.28m | |||||||
 |  | | | |  | | | | | | | |  | | |  |  | | | |
 | — | — | 6:13 | — | — | 6:15 | — | — | 6:15 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — |
 | 6:34 | — | — | 6:32 | — | — | 6:31 | — | — | 6:30 | — | — | 6:30 | — | — | 6:29 | — | — | 6:28 | — |
mm | 3 | 4 | 2 | 1 | 1 | — | 2 | 2 | — | 1 | 1 | — | 2 | — | — | — | — | — | — | — |
Temp °C | 28 | 27 | 28 | 28 | 27 | 27 | 28 | 27 | 28 | 28 | 27 | 27 | 28 | 27 | 27 | 27 | 26 | 26 | 27 | 26 |
Feels °C | 31 | 31 | 31 | 31 | 30 | 31 | 31 | 30 | 32 | 31 | 30 | 30 | 31 | 29 | 28 | 27 | 24 | 23 | 25 | 24 |
Swell 1 Height (m) Direction Period (s) | E 9 | E 9 | ESE 10 | ESE 9 | ESE 9 | ESE 9 | E 9 | E 9 | E 9 | E 9 | E 9 | ESE 9 | E 14 | E 13 | E 12 | E 14 | E 13 | E 13 | E 12 | E 12 |
| kJ | 176 | 180 | 150 | 144 | 113 | 108 | 83 | 76 | 57 | 54 | 55 | 77 | 136 | 737 | 723 | 1559 | 1391 | 956 | 702 | 365 |
Swell 2 Height (m) Direction Period (s) | NNW 6 | NNW 6 | NNW 6 | NNW 7 | NNW 7 | N 6 | E 13 | N 6 | N 7 | N 7 | E 12 | ESE 15 | ENE 11 | NNW 9 | N 7 | S 8 | S 8 | S 8 | S 7 | N 8 |
| kJ | 21 | 18 | 20 | 25 | 26 | 21 | 84 | 19 | 25 | 15 | 44 | 74 | 95 | 26 | 16 | 11 | 10 | 4 | 4 | 132 |
Swell 3 Height (m) Direction Period (s) | SW 8 | E 15 | E 14 | E 14 | E 14 | E 14 | N 6 | E 13 | E 12 | E 12 | S 8 | ENE 11 | ESE 10 | S 8 | S 8 | S 8 | S 8 | — | SE 10 | S 7 |
| kJ | 3 | 17 | 64 | 58 | 100 | 92 | 20 | 84 | 47 | 45 | 22 | 43 | 52 | 12 | 12 | 11 | 10 | — | 4 | 4 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | NE 3 | ENE 4 | — | — | — | — | N 3 | — | N 7 | — | — | N 7 | N 8 | N 8 | N 8 | — |
| kJ | — | — | — | — | 2 | 4 | — | — | — | — | 1 | — | 23 | — | — | 32 | 80 | 142 | 157 | — |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 17 | 17 | 15 | 15 | 0 | 15 | 15 | 15 | 0 | 15 | 15 | 24 | 49 | 15 | 673 | 673 | 673 | 673 | 598 | 24 |
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.
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