Aha
Pull to refresh
Hourly Forecast
Timezone: Asia/Tokyo
⏱️s.
⚡️kJ
🔮
🌒
Wednesday 20
Thursday 21
Friday 22
Saturday 23
Sunday 24
Monday 25
Tap a forecast cell to explore conditions on the map.
This forecast is 3 hrs behind.
to get real-time data.
Surfnerd Logo
Join Surfnerd for free to check this forecast
Join Surfnerd to check forecasts, set your homespot, save and create spots and log your surf sessions.
Sign up with AppleSign up with Google

Aha surf guide

Aha is a surf spot that offers a mix of conditions for different skill levels. It's located around the port area and features a few waves that attract surfers looking for a decent session. The vibe here can be laid-back, but you should be prepared for some crowds, especially at the more popular breaks. The local scene can also be a bit touchy at times, particularly at Aha-yoko, which is known for its more challenging waves.

The surf at Aha generally works best on a low tide, delivering some easier right waves around the port. The lefts at Aha-yoko are different; they can be hollow and heavy, making them more suitable for expert surfers. The optimal swell direction is from the Northeast, though it also handles swell coming from both the North and East. You can expect the spot to work with swell sizes around 2ft (0.6m) and up, breaking over an uneven reef. The wave directions include both lefts and rights, which gives you a chance to pick your preference. For the best experience, aim for a West wind and try to hit it at low, mid, or high tide.

Keep in mind that Aha isn't for beginners, especially at Aha-yoko. You'll want to make sure you're confident in your skills if you venture there. The port area will be more forgiving, making it a better spot for improvers who are still building their skills. Just be aware of the crowd, as it can get busy, and respect the locals to have a smoother experience.

Surf reports and surf forecasts nearby Aha

Ko Chan
Okinawa, Japan
Reef break
Wed 20
Thu 21
Fri 22
Sat 23
Sun 24
Mon 25
Tue 26
Wed 27
Thu 28
Fri 29
Sat 30
Sun 31
Aha
Okinawa, Japan
Reef break
Wed 20
Thu 21
Fri 22
Sat 23
Sun 24
Mon 25
Tue 26
Wed 27
Thu 28
Fri 29
Sat 30
Sun 31
Buma
Okinawa, Japan
Beach break
Wed 20
Thu 21
Fri 22
Sat 23
Sun 24
Mon 25
Tue 26
Wed 27
Thu 28
Fri 29
Sat 30
Sun 31
Ikei
Okinawa, Japan
Reef break
Wed 20
Thu 21
Fri 22
Sat 23
Sun 24
Mon 25
Tue 26
Wed 27
Thu 28
Fri 29
Sat 30
Sun 31
Maeda
Okinawa, Japan
Reef break
Wed 20
Thu 21
Fri 22
Sat 23
Sun 24
Mon 25
Tue 26
Wed 27
Thu 28
Fri 29
Sat 30
Sun 31
Mainside
Okinawa, Japan
Reef break
Wed 20
Thu 21
Fri 22
Sat 23
Sun 24
Mon 25
Tue 26
Wed 27
Thu 28
Fri 29
Sat 30
Sun 31
Turtles
Okinawa, Japan
Reef break
Wed 20
Thu 21
Fri 22
Sat 23
Sun 24
Mon 25
Tue 26
Wed 27
Thu 28
Fri 29
Sat 30
Sun 31
Sunabe Seawall
Okinawa, Japan
Reef break
Wed 20
Thu 21
Fri 22
Sat 23
Sun 24
Mon 25
Tue 26
Wed 27
Thu 28
Fri 29
Sat 30
Sun 31
Bowls
Okinawa, Japan
Reef break
Wed 20
Thu 21
Fri 22
Sat 23
Sun 24
Mon 25
Tue 26
Wed 27
Thu 28
Fri 29
Sat 30
Sun 31
Kudaka
Okinawa, Japan
Reef break
Wed 20
Thu 21
Fri 22
Sat 23
Sun 24
Mon 25
Tue 26
Wed 27
Thu 28
Fri 29
Sat 30
Sun 31
Login to do spot actions
Wind certainty

Wind certainty tells you how much the weather models agree on the forecast.

  • High certainty: Models agree closely; forecast is reliable.
  • Medium certainty: Some disagreement; conditions may shift slightly.
  • Low certainty: Models diverge; treat forecast with caution.

We calculate this by comparing wind speed, gust and direction from multiple models (like GFS, ECMWF, Arome, and Harmonie) and seeing how closely they match. They are weighted, meaning that some models count more than others, depending on how good they are for a certain spot.

Readme

Welcome! If you’re new to surf forecasting, check out this quick guide.

Forecast Cheat Sheet

Short on time? Focus on wave energy. It’s the best single metric to gauge how big and powerful the waves will be.

Click any table cell to jump to that forecast hour. The map will update with forecast arrows, so you can see if wind and swell direction are lining up.

Use the table sidebar to switch units for height and speed.

Log your surf sessions to compare forecasts with real sessions and sharpen future predictions.

On the map, click a metric label to bring that arrow to the front — handy when arrows overlap.

Models and Updates

Surfnerd blends multiple global and local wind and swell models using advanced interpolation and spatial techniques to create an "ensemble" forecast. Forecasts are refreshed hourly.

Surf Predictions

Our AI-driven algorithm scores surf quality, shown by green, orange, and gray dots. Each forecast hour is rated for wind, swell, and tide quality, then combined into an overall score. Here’s the scale:

Perfect
Good
Average
Bad or No Data

Session logs also feed the algorithm — the more you log, the smarter your forecasts get.

With Surfnerd, no more "you should have been here yesterday"

Surfnerd Logo
Join Surfnerd+ and get:
  • Always fresh
    forecasts
    (vs 3-hour delay)
  • 12-day
    forecast range
    (vs 6-day)
  • 1-hour
    forecast steps
    (vs 3-hour)
  • Unlimited
    spot checks
    (vs 3/day)
"Great Forecasts. Nothing more, nothing less."