Surf Forecasts:
Aja surf forecast from 11 Jul 2026:
- Most powerful swell: Sunday 12 Jul, 6PM (local time) - 2ft (0.6m), 10s period, W swell with 75 kJ wave energy.
Best Forecast Surf Conditions for Aja this week:
The most powerful waves expected at Aja in the next 16 days are 0.6m 10s and forecast to arrive on Sunday (Jul 12) at 6PM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 5.5m 13s period and expected on Sunday (Jul 12) at 12AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 6PM (Sun 12th Jul) | 2ft (0.6m) 10s |
Table - best surf conditions forecast for Aja over the next 16 days.
Alright, Rusty here. Let’s break down what’s coming for the local surf.
It’s a grim start, I’m not gonna lie. From Saturday the 11th right through to the morning of Sunday the 19th, there’s nothing to surf. That’s over a week of flatness. The wind was a gale out of the southeast on Saturday, and even when it backed off to a fresh offshore, there’s no wave energy at all – the combined energy is basically zero. You’d be better off polishing your board.
Then, on Sunday the 19th, things finally wake up. That’s the standout. Sunday morning we get a proper east groundswell at 4ft with a long 14-second period. The combined energy jumps to 494 – that’s serious power. And the wind? Glassy. Dead calm. That’s about as good as it gets. By the afternoon the swell pushes to 4ft, still with a 13-second period, and a gentle offshore from the SSE. At Aja, a reef break exposed to the north, this is the best window in the whole 16-day forecast. Water temp is 84°, right about average for this time of year.
Mind you, this spot is inconsistent and it’s a reef break, so keep your head on a swivel. But with glassy conditions and that long east swell, the shape should be solid and the paddle-out easier between sets. Crowds can pop up here sometimes, so don’t be surprised if you’ve got company.
Monday the 20th goes flat again. Then Tuesday the 21st and Wednesday the 22nd bring some east windswell at 5ft to 4ft, but the period drops to a short 8 seconds. The combined energy is in the 300s, so there’s push, but it’s lumpy and cross-offshore. The forecast calls it marginal, and I’d call it a messy option for the die-hards.
Thursday the 23rd is a bit better. Morning shows 3ft east swell with a longer 12-second period and clean cross-offshore wind. Combined energy of 273. That’s the second-best call, but the wind turns cross-shore in the afternoon, so surf early.
From Friday the 24th, it fades fast. By Sunday the 26th, we get a strange little pulse from the WNW at 5ft but with a terrible 6-second period and combined energy of 165 – that’s just wind chop, not a real wave.
Your one true standout is Sunday the 19th at Aja (Costa Rica). That’s your day. The rest is either flat, marginal, or junky.
Rusty.
Short Range ForecastModerate rain (total 12mm), heaviest on Sat afternoon. Warm (max 29°C on Sat afternoon, min 28°C on Sat afternoon). Winds decreasing (gales from the SE on Sat afternoon, moderate winds from the SSE by Mon night). | Days 5-7 Weather SummaryLight rain (total 2mm), mostly falling on Wed night. Warm (max 30°C on Thu morning, min 27°C on Thu night). Wind will be generally light. | ||||||||||||||||||||
Sat 11 | Sunday 12 | Monday 13 | Tuesday 14 | Wednesday 15 | Thursday 16 | Friday 17 | |||||||||||||||
PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | |
Swell Height Map |  |  |  |  |  |  |  |  | |||||||||||||
Wave Height (m) Direction Period (s) | S 16 | S 13 | S 12 | S 11 | SSE 10 | W 11 | E 9 | E 9 | E 9 | E 9 | E 9 | E 9 | E 9 | SSW 10 | SSW 10 | E 11 | SW 10 | SW 10 | SW 9 | SW 9 | E 8 |
Wave Graph  | |||||||||||||||||||||
 kJ | 0 | 0 | 0 | 0 | 0 | 9 | 15 | 15 | 15 | 15 | 15 | 14 | 14 | 0 | 0 | 20 | 0 | 0 | 0 | 0 | 12 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | cross-off | off | cross-off | off | cross-off | off | cross-off | cross-off | cross-off | cross-off | cross-off | cross | cross | cross | cross-on | cross-off | cross-on | on | glassy | glassy |
High Tide | 5:20PM1.79m | 4:22AM2.02m | 6:20PM1.92m | 5:21AM2.13m | 7:10PM2.02m | 6:16AM2.23m | 7:55PM2.08m | 7:07AM2.29m | 8:37PM2.11m | 7:56AM2.29m | 9:17PM2.10m | 8:44AM2.23m | 9:54PM2.07m | 9:32AM2.10m | |||||||
Low Tide | 10:36PM1.17m | 11:28AM0.21m | 11:40PM1.13m | 12:23PM0.08m | 00:34AM1.07m | 1:13PM-0.01m | 1:23AM1.00m | 2:00PM-0.03m | 2:10AM0.93m | 2:44PM0.03m | 2:56AM0.87m | 3:25PM0.15m | 3:42AM0.83m | ||||||||
 |  | | |  |  | | | | |  |  | | | | | | | | | | |
 | — | — | 5:43 | — | — | 5:45 | — | — | 5:45 | — | — | 5:46 | — | — | 5:46 | — | — | 5:47 | — | — | 5:47 |
 | 7:24 | — | — | 7:23 | — | — | 7:23 | — | — | 7:23 | — | — | 7:23 | — | — | 7:22 | — | — | 7:22 | — | 7:22 |
mm | 4 | 4 | 2 | 1 | — | — | — | — | 1 | — | — | — | — | 1 | — | — | — | 1 | 1 | — | — |
Temp °C | 29 | 29 | 29 | 29 | 28 | 29 | 29 | 28 | 29 | 29 | 28 | 29 | 29 | 28 | 30 | 29 | 28 | 29 | 29 | 28 | 29 |
Feels °C | 25 | 26 | 30 | 30 | 29 | 30 | 30 | 30 | 31 | 31 | 32 | 32 | 32 | 33 | 35 | 33 | 34 | 34 | 33 | 33 | 34 |
Swell 1 Height (m) Direction Period (s) | — | SW 13 | SW 12 | SW 11 | SW 10 | W 11 | E 9 | E 9 | E 9 | S 8 | S 8 | E 9 | SSW 8 | SSW 10 | SSW 10 | SW 10 | SW 10 | SW 10 | SW 9 | SW 9 | SW 9 |
| kJ | — | 1648 | 846 | 418 | 115 | 9 | 7 | 15 | 15 | 317 | 223 | 14 | 163 | 320 | 256 | 133 | 157 | 181 | 162 | 135 | 93 |
Swell 2 Height (m) Direction Period (s) | — | SW 16 | — | W 10 | W 10 | SE 13 | SE 13 | SE 10 | SE 12 | E 9 | E 9 | SE 11 | SW 10 | ESE 10 | ESE 10 | S 7 | ESE 10 | S 7 | ESE 9 | ESE 9 | E 8 |
| kJ | — | 381 | — | 55 | 47 | 7 | 7 | 4 | 6 | 15 | 15 | 19 | 26 | 31 | 31 | 37 | 18 | 15 | 29 | 29 | 12 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | SE 13 | SE 13 | E 9 | SE 12 | SE 9 | SE 12 | SSE 12 | SW 10 | E 9 | SE 11 | S 7 | E 11 | SSE 10 | ESE 9 | S 7 | S 7 | ESE 10 |
| kJ | — | — | — | — | 7 | 7 | 15 | 6 | 3 | 6 | 13 | 15 | 14 | 18 | 4 | 20 | 9 | 29 | 4 | 8 | 19 |
Wind waves Height (m) Direction Period (s) | S 16 | S 13 | S 12 | S 11 | SSE 10 | S 9 | S 9 | S 9 | S 8 | SSE 8 | — | SSW 8 | SW 8 | S 7 | S 7 | — | S 7 | — | — | — | — |
| kJ | 30854 | 9424 | 3454 | 2038 | 1086 | 800 | 642 | 440 | 354 | 151 | — | 238 | 84 | 64 | 45 | — | 25 | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 610 | 590 | 607 | 607 | 607 | 613 | 839 | 613 | 607 | 613 | 14 | 14 | 93 | 93 | 598 | 93 | 14 | 16 | 16 | 14 | 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.
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