Surf Forecasts:
Aja surf forecast from 16 Sep 2026:
- Best quality surf: Friday 18 Sep, 3AM (local time) - 1.5ft (0.5m), 13s period, E swell with cross-offshore winds.
- Most powerful swell: Sunday 20 Sep, 3AM (local time) - 5ft (1.6m), 13s period, E swell with 797 kJ wave energy.
- Next surfable swell (1★+): Friday 18 Sep, 3AM (local time) - 1.5ft (0.5m), 13s 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 (Sep 18) at 3AM. The primary swell is predicted to be 0.5m and 13s period with a secondary swell of 0.7m and 9s. Another secondary swell of 0.5m and 7s is also forecast. Another secondary swell of 0.3m and 3s is also forecast. 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 1.6m 13s and forecast to arrive on Sunday (Sep 20) at 3AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 9s period and expected on Wednesday (Sep 16) at 3PM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3AM (Fri 18th Sep) | 1.5ft (0.5m) 13s |
| Best Surf | 3AM (Fri 18th Sep) | 1.5ft (0.5m) 13s |
| Most Powerful | 3AM (Sun 20th Sep) | 5ft (1.6m) 13s |
Table - best surf conditions forecast for Aja over the next 16 days.
The Lowdown
Alright, folks, let’s talk about Aja's outlook. For the next week and a bit, it's looking pretty bleak, to be honest.
From the 17th through the 25th, the surf is mostly small and junked up. There's just not enough size, and the wind has too much cross in it. We're looking at a lot of poor conditions and waist-high or smaller waves. We get a brief clean window on the morning of Friday the 18th, but it's still tiny. The water temp is hanging around 84°F, which is about normal for this time of year.
The real downer is a long stretch of flatness from the 26th through the 29th of September. For four days, there's simply no surf at all.
Then, things get interesting, but not for the faint of heart. On the 27th, a big, stormy 4.5m (15 ft) NE swell arrives in the morning, but it's short-period and junky. The energy is significant (3579), but it's a wall of mush. The next day, the 28th, is your best bet. We see a much larger 5.0m (16 ft) WNW groundswell rolling in, and the energy jumps up to (5794). With an ESE offshore wind keeping it clean, this is the standout period. This is a serious, powerful swell – a crewed-up lineup kind of wave. This is not a beginner's day; this is expert territory only. So, if you're not comfortable in the big stuff, you might want to give the 28th a miss.
By the 30th, the swell drops off dramatically, leaving behind small, clean waves for the first of the month. The wind goes offshore, but the power is gone.
Aja is an inconsistent reef at the best of times, and this forecast doesn't do much to change that reputation. With the long flat spell followed by a short, intense, and potentially dangerous pulse, this isn't the best week to be a beginner. The best opportunity for experienced surfers is definitely the 28th, but only if you're truly comfortable in heavy, overhead surf.
Stay safe out there.
Rusty
Short Range ForecastLight rain (total 5mm), mostly falling on Wed morning. Warm (max 28°C on Wed morning, min 26°C on Wed night). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 5mm), mostly falling on Sat night. Warm (max 28°C on Sat morning, min 25°C on Sun night). Wind will be generally light. | ||||||||||||||||||||
Wednesday 16 | Thursday 17 | Friday 18 | Saturday 19 | Sunday 20 | Monday 21 | Tuesday 22 | |||||||||||||||
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 14 | E 14 | E 14 | E 9 | E 9 | E 13 | E 9 | E 9 | E 12 | N 8 | E 15 | E 13 | E 12 | E 12 | E 12 | E 12 | E 12 | E 11 | ENE 11 | N 7 | N 7 |
Wave Graph  | |||||||||||||||||||||
 kJ | 64 | 59 | 100 | 130 | 103 | 84 | 55 | 54 | 44 | 18 | 218 | 749 | 723 | 738 | 638 | 555 | 384 | 151 | 66 | 35 | 23 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross | cross | cross | cross | cross-off | cross-on | cross | cross-on | cross-on | cross-on | cross | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross |
High Tide | 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 | 3:41AM1.67m | 5:28PM1.80m | ||||||||
Low Tide | 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 | 10:45AM0.70m | 11:03PM1.11m | ||||||||
 | |  |  | | | | | |  | |  |  | | | | |  | | | | |
 | 6:13 | — | — | 6:15 | — | — | 6:15 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — |
 | — | 6:32 | — | — | 6:31 | — | — | 6:30 | — | — | 6:30 | — | — | 6:29 | — | — | 6:28 | — | — | 6:25 | — |
mm | 1 | 1 | — | — | 2 | — | 1 | — | — | — | — | 1 | 1 | 2 | 1 | — | — | — | — | — | — |
Temp °C | 28 | 28 | 26 | 27 | 27 | 26 | 28 | 28 | 27 | 28 | 28 | 27 | 27 | 27 | 26 | 27 | 27 | 27 | 27 | 27 | 26 |
Feels °C | 31 | 31 | 28 | 29 | 30 | 29 | 32 | 31 | 30 | 30 | 30 | 29 | 29 | 29 | 26 | 26 | 26 | 27 | 27 | 28 | 27 |
Swell 1 Height (m) Direction Period (s) | ESE 10 | ESE 9 | ESE 9 | E 9 | E 9 | E 9 | E 9 | E 9 | ESE 9 | ESE 9 | E 15 | E 13 | E 12 | E 12 | E 12 | E 12 | E 12 | N 8 | N 7 | N 7 | N 7 |
| kJ | 150 | 144 | 113 | 130 | 103 | 76 | 55 | 54 | 64 | 61 | 218 | 749 | 723 | 738 | 638 | 555 | 384 | 76 | 38 | 34 | 23 |
Swell 2 Height (m) Direction Period (s) | NNW 6 | N 7 | NNW 7 | NNW 6 | E 13 | N 8 | N 7 | N 7 | E 12 | N 8 | E 9 | S 8 | S 8 | S 8 | S 8 | S 8 | S 8 | E 11 | ENE 11 | ENE 10 | ENE 10 |
| kJ | 28 | 43 | 35 | 23 | 84 | 29 | 25 | 15 | 44 | 18 | 57 | 22 | 21 | 12 | 11 | 10 | 10 | 151 | 66 | 35 | 18 |
Swell 3 Height (m) Direction Period (s) | E 14 | E 14 | E 14 | E 14 | NNW 6 | E 13 | E 12 | E 12 | S 8 | S 8 | ENE 11 | N 9 | NNW 7 | SE 8 | NNW 8 | SE 10 | SE 10 | S 7 | E 10 | E 10 | E 9 |
| kJ | 64 | 59 | 100 | 92 | 12 | 84 | 47 | 45 | 22 | 22 | 68 | 13 | 9 | 3 | 13 | 4 | 4 | 4 | 18 | 7 | 15 |
Wind waves Height (m) Direction Period (s) | — | NE 3 | ENE 3 | NE 4 | — | NE 3 | — | — | N 3 | NNW 9 | NNW 7 | N 8 | N 7 | N 6 | N 8 | N 7 | N 8 | — | — | — | — |
| kJ | — | 1 | 4 | 7 | — | 3 | — | — | 3 | 15 | 16 | 37 | 23 | 19 | 84 | 126 | 125 | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 15 | 15 | 15 | 15 | 15 | 15 | 0 | 15 | 24 | 17 | 673 | 15 | 49 | 17 | 598 | 598 | 684 | 15 | 15 | 10 | 22 |
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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