Surf Forecasts:
Yonabaru surf forecast from 11 Aug 2026:
- Best quality surf: Wednesday 12 Aug, 6AM (local time) - 2ft (0.6m), 11s period, E swell with cross-offshore winds.
- Most powerful swell: Tuesday 11 Aug, 3PM (local time) - 2.5ft (0.7m), 12s period, E swell with 136 kJ wave energy.
- Next surfable swell (1★+): Wednesday 12 Aug, 6AM (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 6AM. The primary swell is predicted to be 0.6m and 11s period. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Yonabaru in the next 16 days are 0.7m 12s and forecast to arrive on Tuesday (Aug 11) at 3PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.6m 9s period and expected on Tuesday (Aug 11) at 9PM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6AM (Wed 12th Aug) | 2ft (0.6m) 11s |
| Best Surf | 6AM (Wed 12th Aug) | 2ft (0.6m) 11s |
| Most Powerful | 3PM (Tue 11th Aug) | 2.5ft (0.7m) 12s |
Table - best surf conditions forecast for Yonabaru over the next 16 days.
The Lowdown
Alright, let’s take a look at what we’ve got at Yonabaru for the next couple of weeks.
Honestly, I’m not going to sugarcoat it – this stretch is thin. You’ve got some small windows of clean, rideable surf, but nothing that’s going to blow your hair back. Most of the 16-day run is marked as poor, so you’ve got to be selective.
The first decent opportunity shows up Wednesday the 12th of August. There’s a small 2ft east swell with 11-second period, and a light cross-offshore breeze in the morning – clean conditions, but weak energy (86). That afternoon turns glassy, still tiny at 2ft, but you’ll have a clean face to play on. Yonabaru is a beginner-friendly wave, and with crowds showing up sometimes, you might have company for these small waves.
Thursday the 13th of August morning stays clean with a light cross-off breeze. Still the same 2ft east swell, 10-second period, energy falling to (73). Not a standout, just a nice little session if you’re keen.
Now, if you want the real standout on paper, you’ll have to look all the way to Thursday the 20th of August. The swell jumps to a solid 11-12ft from the southeast, with 10-second period, and the combined energy hits (2414) – that’s serious power. But the wind is blowing cross-onshore at 18 mph, so it’ll be lumpy and messy. At this size, you’re looking at a wave for experts only, and with the wind, it’s probably more interesting for the kite crew than for a clean paddling session.
There’s also a noteworthy event on Tuesday the 25th of August: a 5ft east-southeast swell with a very long 14-second period and strong energy (1159). Problem is the onshore wind is cranking at 25 mph, making it a choppy mess. That long-period groundswell would be magic on a point or reef, but here, with the wind straight on, it’s just not going to happen.
The end of the month shows even bigger pulses – 11-12ft swells with 14-15 second periods and massive energy, but paired with near-gale cross-shore winds. Dangerous and ugly.
To put it simply: your best bet for a clean ride is Wednesday the 12th and maybe Thursday the 13th – small, but clean and friendly. The bigger stuff later on is powerful but blown sideways. Forecasts can change, so don’t give up hope completely, but right now it’s a quiet run for Yonabaru.
Rusty.
Short Range ForecastModerate rain (total 19mm), heaviest on Wed morning. Warm (max 30°C on Tue morning, min 26°C on Wed afternoon). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 7mm), mostly falling on Fri morning. Warm (max 30°C on Sat afternoon, min 26°C on Fri morning). Wind will be generally light. | ||||||||||||||||||||
Tuesday 11 | Wednesday 12 | Thursday 13 | Friday 14 | Saturday 15 | Sunday 16 | Monday 17 | |||||||||||||||
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 12 | E 12 | E 12 | E 11 | E 11 | E 10 | E 10 | E 10 | ENE 10 | E 10 | SSW 8 | E 9 | E 11 | E 11 | E 10 | E 10 | E 10 | E 10 | E 10 | E 10 | E 6 |
Wave Graph  | |||||||||||||||||||||
 kJ | 181 | 136 | 134 | 86 | 83 | 51 | 73 | 51 | 33 | 31 | 0 | 16 | 61 | 59 | 72 | 98 | 100 | 50 | 49 | 49 | 134 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross | cross-on | cross-off | glassy | glassy | cross-off | off | cross-off | cross-off | cross-off | glassy | cross | cross-off | cross | cross-on | on | on | on | on | on |
High Tide | 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 | 8:27AM2.17m | 8:59PM2.11m | 9:07AM2.08m | 9:27PM2.09m | ||||||||
Low Tide | 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 | 2:45PM0.47m | 3:02AM0.64m | 3:16PM0.62m | ||||||||
 |  |  |  | |  | |  |  | | | |  | |  | | | | | | | |
 | 5:58 | — | — | 5:58 | — | — | 5:58 | — | — | 6:00 | — | — | 6:00 | — | — | 6:01 | — | — | 6:01 | — | — |
 | — | 7:08 | — | — | 7:07 | — | — | 7:07 | — | — | 7:06 | — | — | 7:05 | — | — | 7:05 | — | — | 7:04 | — |
mm | 1 | — | 3 | 7 | 4 | — | — | 2 | 2 | 4 | 1 | — | — | — | — | — | — | 2 | — | — | — |
Temp °C | 30 | 30 | 28 | 27 | 27 | 27 | 29 | 26 | 26 | 27 | 27 | 26 | 29 | 30 | 27 | 30 | 30 | 28 | 29 | 29 | 27 |
Feels °C | 34 | 34 | 33 | 31 | 32 | 32 | 32 | 29 | 28 | 30 | 32 | 30 | 32 | 33 | 32 | 34 | 34 | 33 | 31 | 31 | 28 |
Swell 1 Height (m) Direction Period (s) | S 10 | S 10 | SSW 9 | S 9 | SSW 9 | S 8 | SW 8 | SW 8 | SSW 9 | SSW 8 | SSW 8 | SSW 9 | SSW 8 | SSW 9 | SSW 9 | SSW 9 | SSW 9 | SSW 9 | SSW 9 | SW 9 | SSW 9 |
| kJ | 490 | 356 | 360 | 188 | 268 | 138 | 100 | 102 | 119 | 160 | 111 | 138 | 194 | 254 | 268 | 222 | 274 | 176 | 165 | 107 | 130 |
Swell 2 Height (m) Direction Period (s) | E 12 | SW 10 | E 12 | SW 9 | E 11 | SW 9 | S 9 | S 8 | S 8 | E 10 | S 8 | S 8 | E 11 | E 11 | E 10 | E 10 | E 10 | S 8 | E 10 | E 10 | S 7 |
| kJ | 181 | 115 | 134 | 117 | 83 | 78 | 99 | 65 | 45 | 31 | 36 | 50 | 61 | 59 | 72 | 98 | 100 | 44 | 49 | 49 | 16 |
Swell 3 Height (m) Direction Period (s) | SW 10 | E 12 | E 6 | E 11 | ESE 6 | E 10 | E 10 | E 10 | ENE 10 | NW 5 | WNW 7 | E 9 | WNW 8 | W 7 | E 6 | W 7 | W 8 | E 10 | S 7 | S 8 | SE 10 |
| kJ | 100 | 136 | 37 | 86 | 12 | 51 | 73 | 51 | 33 | 8 | 17 | 16 | 22 | 16 | 5 | 4 | 5 | 50 | 17 | 28 | 4 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | NW 2 | WNW 5 | — | NW 5 | — | SSE 3 | S 8 | — | ESE 3 | — | E 5 | E 5 | E 5 | E 6 |
| kJ | — | — | — | — | — | — | — | 1 | 46 | — | 4 | — | 4 | 86 | — | 1 | — | 20 | 16 | 45 | 134 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 10 | 10 | 10 | 0 | 0 | 10 | 0 | 12 | 13 | 13 | 13 | 13 | 13 | 12 | 13 | 13 | 13 | 10 | 16 | 16 | 13 |
Best forecast wave conditions in Okinawa | |||||||||||||||||||||
Best forecast wave conditions in Japan | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
Latest Updates
FREE! Surf-Forecast.com widget for your website
The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Yonabaru surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.
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.
Nearest