
Surf Forecasts:
Yonabaru surf forecast from 9 Aug 2026:
- Best quality surf: Wednesday 12 Aug, 3PM (local time) - 2ft (0.6m), 11s period, E swell with offshore winds.
- Most powerful swell: Monday 10 Aug, 6AM (local time) - 3.5ft (1.1m), 14s period, E swell with 482 kJ wave energy.
- Next surfable swell (1★+): Wednesday 12 Aug, 3PM (local time) - 2ft (0.6m), 11s period with E swell.
Best Forecast Surf Conditions for Yonabaru this week:
The surf forecast for Yonabaru over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Wednesday (Aug 12) at 3PM. The primary swell is predicted to be 0.6m and 11s period. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Yonabaru in the next 16 days are 1.1m 14s and forecast to arrive on Monday (Aug 10) at 6AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.9m 11s period and expected on Monday (Aug 10) at 6AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3PM (Wed 12th Aug) | 2ft (0.6m) 11s |
| Best Surf | 3PM (Wed 12th Aug) | 2ft (0.6m) 11s |
| Most Powerful | 6AM (Mon 10th Aug) | 3.5ft (1.1m) 14s |
Table - best surf conditions forecast for Yonabaru over the next 16 days.
The Lowdown
Alright, let’s get real about the surf ahead. Honestly, the next couple of weeks are looking pretty flat and frustrating around here. We’ve got a long stretch of small, weak, and messy waves, and the wind isn’t doing us any favors for most of it. It’s one of those times where you might be better off giving the board a rest and finding something else to do.
The only spot with any kind of wave on the radar is Yonabaru, and even that’s a struggle. It’s a pretty exposed beginner-friendly beach, and normally it can pick up something, but the guidance is pretty bleak. The swell energy is weak for the most part, with readings in the low hundreds or even below 100 (like 297 down to 30) – that’s just not enough push to get anything decent breaking.
For the first part of the period, through the 15th, we’re looking at tiny waves – nothing over 3ft. The wind is mostly cross or cross-onshore, which chops things up and makes it messy. There’s a brief window on Wednesday afternoon the 12th where the wind actually goes offshore and it cleans up, but the swell is only 2ft, so it’s just not worth getting excited about. Same story on Sunday the 16th – a bit of a cross-off wind, but again, tiny 2ft waves.
Then, from the 17th through the 20th, the wind swings onshore and actually builds to a fresh breeze (19 mph). That’s going to make things pretty rough and bumpy, even with the swell staying small around 2ft to 4ft. Not good.
Around the 21st, we finally see a pulse of energy. The swell jumps up a bit, with combined energy hitting 458 and then 480. That’s a moderate push, and the swell height comes up to around 7ft. But here’s the catch – the period is short, about 8 seconds, and the wind is cross-onshore. So you’re getting a bit of size but with a lot of chop. It’s not going to be clean, and for a beginner spot like this, that 7ft might be pushing it.
After that little pulse, it drops back down again fairly quickly, and the wind stays messy. Then at the very end of the forecast, around the 24th and 25th, there’s another surge – the energy gets strong, readings of 1113 and 968, with waves pushing 7ft. That’s the biggest we see, but again, the period is short and the wind is cross-onshore. It’ll be a lumpy, windy mess, not the kind of day you’d want to paddle out for a relaxing session. That’s more of a churn.
So, plain and simple, there are no good surf options in this 16-day window. The water temp is about average for this time of year, so that’s not a factor. The lack of any decent swell with clean winds is the main problem. For an exposed beach like Yonabaru, it can sometimes pull in a bit more, but the forecast just doesn’t have it. Given the onshore winds and the size later on, this setup might actually look more interesting for kite surfing than paddle surfing. But for us surfers, it’s a waiting game. Forecasts can always change, but as it stands, it’s a blank run.
Rusty.
Short Range ForecastModerate rain (total 14mm), heaviest on Wed afternoon. Warm (max 30°C on Mon morning, min 26°C on Wed afternoon). Winds decreasing (fresh winds from the SSE on Sun night, calm by Wed afternoon). | Days 5-7 Weather SummaryLight rain (total 6mm), mostly falling on Thu night. Warm (max 30°C on Thu morning, min 27°C on Wed night). Wind will be generally light. | ||||||||||||||||||
Monday 10 | Tuesday 11 | Wednesday 12 | Thursday 13 | Friday 14 | Saturday 15 | ||||||||||||||
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 9 | E 14 | E 13 | E 12 | E 12 | E 12 | E 12 | E 11 | E 11 | E 10 | E 10 | E 10 | E 10 | E 10 | E 10 | E 9 | E 11 | E 11 | E 11 |
Wave Graph | |||||||||||||||||||
71 | 297 | 280 | 248 | 181 | 136 | 134 | 86 | 83 | 73 | 73 | 75 | 52 | 31 | 30 | 15 | 61 | 84 | 82 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross | cross | off | glassy | cross | cross | cross-on | cross-on | cross-on | cross-on | cross | cross-on | cross-on |
High Tide | 3:54AM1.92m | 6:07PM1.86m | 4:54AM2.01m | 6:39PM1.95m | 5:43AM2.11m | 7:09PM2.03m | 6:27AM2.18m | 7:37PM2.08m | 7:08AM2.22m | 8:05PM2.11m | 7:48AM2.22m | 8:32PM2.12m | |||||||
Low Tide | 10:23PM1.34m | 11:08AM0.43m | 11:20PM1.24m | 11:53AM0.33m | 00:03AM1.12m | 12:32PM0.26m | 00:41AM0.99m | 1:07PM0.25m | 1:17AM0.87m | 1:41PM0.28m | 1:51AM0.76m | 2:13PM0.35m | 2:26AM0.69m | ||||||
— | 5:58 | — | — | 5:58 | — | — | 5:58 | — | — | 5:58 | — | — | 6:00 | — | — | 6:00 | — | — | |
7:09 | — | 7:08 | — | — | 7:08 | — | — | 7:07 | — | — | 7:07 | — | — | 7:06 | — | — | 7:05 | — | |
mm | 4 | 1 | — | 1 | 2 | — | — | — | 6 | — | — | — | 3 | 3 | — | — | — | — | — |
Temp °C | 28 | 30 | 30 | 28 | 29 | 30 | 28 | 29 | 27 | 27 | 30 | 30 | 27 | 29 | 29 | 27 | 30 | 30 | 28 |
Feels °C | 29 | 32 | 32 | 31 | 33 | 34 | 33 | 33 | 31 | 32 | 33 | 33 | 31 | 33 | 33 | 31 | 34 | 34 | 33 |
Swell 1 Height (m) Direction Period (s) | SW 10 | SW 11 | S 11 | S 10 | S 10 | S 10 | SSW 9 | SSW 9 | S 8 | SSW 8 | S 8 | S 8 | S 9 | SSW 8 | SSW 8 | SSW 9 | SSW 8 | SSW 9 | SSW 9 |
604 | 593 | 584 | 533 | 504 | 490 | 418 | 300 | 210 | 217 | 140 | 89 | 126 | 90 | 111 | 168 | 164 | 168 | 172 | |
Swell 2 Height (m) Direction Period (s) | WSW 11 | E 14 | SW 10 | SW 10 | SW 10 | E 12 | E 12 | E 11 | E 11 | E 10 | SW 8 | SW 8 | SW 8 | S 8 | S 8 | E 9 | E 11 | E 11 | E 11 |
158 | 297 | 486 | 256 | 144 | 136 | 134 | 86 | 83 | 73 | 64 | 66 | 54 | 66 | 33 | 15 | 61 | 84 | 82 | |
Swell 3 Height (m) Direction Period (s) | E 9 | W 10 | E 13 | E 12 | E 12 | SW 10 | E 6 | E 6 | E 6 | N 9 | E 10 | E 10 | E 10 | E 10 | E 10 | W 6 | W 8 | W 7 | W 6 |
71 | 102 | 280 | 248 | 181 | 82 | 17 | 15 | 10 | 13 | 73 | 75 | 52 | 31 | 30 | 7 | 10 | 9 | 7 | |
Wind waves Height (m) Direction Period (s) | SSE 11 | S 11 | E 7 | E 7 | E 6 | — | — | — | — | ESE 6 | — | — | — | — | — | — | — | — | — |
1121 | 748 | 39 | 43 | 47 | — | — | — | — | 7 | — | — | — | — | — | — | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 599 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 0 | 0 | 13 | 13 | 10 | 13 | 13 | 13 | 10 | 10 | 10 |
Best forecast wave conditions in Okinawa | |||||||||||||||||||
Best forecast wave conditions in Japan | |||||||||||||||||||
Header Global | |||||||||||||||||||
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Information about the Yonabaru Surf forecast
The above surf forecast table for Yonabaru provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Yonabaru can be found by selecting the local surf guide option on the grey menu. Our Yonabaru 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 (Yonabaru) 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 Yonabaru 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.
Yonabaru is 5 km (3 miles) from the city of Ginowan. If you plan a holiday in Okinawa, look for hotels and other accommodation in Ginowan. Ginowan has rooms for a wide range of budgets as well as car hire and transport links.











