Surf Forecasts:
Yonabaru surf forecast from 20 Aug 2026:
- Best quality surf: Tuesday 25 Aug, 6AM (local time) - 11ft (3.5m), 17s period, ESE swell with cross-onshore winds.
- Most powerful swell: Tuesday 25 Aug, 9AM (local time) - 11ft (3.5m), 17s period, E swell with 7,175 kJ wave energy.
- Next surfable swell (1★+): Tuesday 25 Aug, 6AM (local time) - 11ft (3.5m), 17s period with ESE 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 Tuesday (Aug 25) at 6AM. The primary swell is predicted to be 3.5m and 17s period with a secondary swell of 0.9m and 4s. The wind is predicted to be cross-onshore as the swell arrives.
The most powerful waves expected at Yonabaru in the next 16 days are 3.5m 17s and forecast to arrive on Tuesday (Aug 25) at 9AM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 4.0m 9s period and expected on Friday (Aug 21) at 9PM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6AM (Tue 25th Aug) | 11ft (3.5m) 17s |
| Best Surf | 6AM (Tue 25th Aug) | 11ft (3.5m) 17s |
| Most Powerful | 9AM (Tue 25th Aug) | 11ft (3.5m) 17s |
Table - best surf conditions forecast for Yonabaru over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s have a look at what’s on the menu for Yonabaru over the next couple of weeks.
Right off the bat, I’ll be straight with you – the start of this run is a total write-off. From Friday morning (21 August) right through to Monday afternoon (24 August), it’s grim. We’ve got a risk of thunderstorms, fresh to strong onshore winds, and the swell is small and weak. Wave energy is pathetic, sitting between 14 and 217 (combined energy), with short-period, junky waves. Don’t bother paddling out.
Things start to look a bit more interesting later in the window. The real standout, and the only time I’d actually get excited, is Tuesday 25 August. Come Tuesday morning, it’s a different story. The wind swings onshore from the ENE at a manageable 12 mph, but the swell kicks up to a solid 12 ft from the east, with a long period of 17 seconds. That’s a proper groundswell, pushing a massive 7209 combined energy. The conditions are favorable for the break, but let’s be clear – at 12 ft, this is strictly for the experienced crew. The swell will be powerful and clean, but it’s no place for beginners. The water temp is about average for this time of year, so nothing unusual there.
After that, the surf drops off again. Wednesday 26 August has a small window of 5 ft from the NNE with light winds, but the cross-on wind and marginal tide conditions make it a bit of a gamble. The rest of the run into the first week of September is mostly poor, with onshore winds and inconsistent swell. The period from 31 August to 5 September shows some bigger swell pushing 5 ft to 7 ft from the east, but the wind stays cross-onshore and lumpy, so it’s never really clean. The energy builds late in the run (up to 1804 combined energy), but the wind ruins it.
If you’re holding out for anything decent, Tuesday 25 August is your best bet. Just know that it’s a big, powerful swell for experts only.
Rusty.
Short Range ForecastHeavy rain (total 20mm), heaviest during Fri morning. Warm (max 29°C on Sat morning, min 26°C on Fri morning). Winds increasing (light winds from the SE on Thu night, strong winds from the SE by Fri night). | Days 5-7 Weather SummaryLight rain (total 4mm), mostly falling on Mon morning. Warm (max 30°C on Tue morning, min 27°C on Sun night). Wind will be generally light. | ||||||||||||||||||
Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | ||||||||||||||
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) | ENE 7 | ESE 6 | ENE 8 | SSE 9 | ENE 9 | SSE 9 | ESE 13 | ESE 6 | ESE 6 | ESE 16 | ESE 17 | ESE 18 | ESE 18 | E 17 | E 16 | ENE 14 | NNE 12 | NW 11 | ESE 9 |
Wave Graph  | |||||||||||||||||||
 kJ | 79 | 118 | 14 | 0 | 8 | 0 | 18 | 143 | 141 | 164 | 921 | 2120 | 4354 | 7175 | 5239 | 1347 | 644 | 1773 | 65 |
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-on | on | on | on | on | on | on | on | on | on | cross-on | on | cross-on |
High Tide | 11:12PM1.91m | 1:25PM1.53m | 00:10AM1.84m | 3:38PM1.57m | 1:38AM1.79m | 4:55PM1.69m | 3:12AM1.83m | 5:37PM1.81m | 4:23AM1.93m | 6:10PM1.92m | 5:17AM2.04m | 6:38PM2.01m | |||||||
Low Tide | 6:30AM0.74m | 5:55PM1.32m | 8:02AM0.73m | 7:49PM1.42m | 9:29AM0.65m | 9:46PM1.39m | 10:33AM0.53m | 10:52PM1.26m | 11:22AM0.42m | 11:37PM1.12m | 12:03PM0.34m | 00:15AM0.96m | |||||||
 |  | |  | | | | | |  | | | |  | |  | |  | | |
 | — | 6:03 | — | — | 6:03 | — | — | 6:03 | — | — | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — |
 | 7:00 | — | 7:00 | — | — | 6:59 | — | — | 6:58 | — | — | 6:57 | — | — | 6:55 | — | — | 6:54 | — |
mm | 2 | 5 | 2 | 2 | 2 | 1 | 4 | 1 | 1 | — | 1 | 1 | 1 | — | 1 | — | — | — | — |
Temp °C | 27 | 27 | 27 | 27 | 29 | 28 | 27 | 28 | 28 | 27 | 28 | 28 | 27 | 30 | 29 | 27 | 29 | 30 | 27 |
Feels °C | 30 | 27 | 25 | 24 | 28 | 27 | 27 | 29 | 29 | 28 | 29 | 30 | 29 | 33 | 32 | 31 | 32 | 33 | 31 |
Swell 1 Height (m) Direction Period (s) | ENE 7 | SSW 8 | SW 10 | SW 10 | SW 10 | SW 10 | SW 10 | S 9 | S 9 | SSW 9 | ESE 17 | ESE 18 | ESE 18 | E 17 | E 16 | ENE 14 | NNE 12 | NW 11 | WNW 11 |
| kJ | 79 | 202 | 26 | 110 | 34 | 296 | 134 | 495 | 380 | 348 | 921 | 2120 | 4354 | 7175 | 5239 | 1347 | 644 | 1773 | 1437 |
Swell 2 Height (m) Direction Period (s) | SW 9 | SW 8 | ENE 8 | — | ENE 9 | — | E 9 | ESE 14 | ESE 13 | ESE 16 | SSW 9 | S 8 | SSW 8 | SSW 9 | SSW 9 | N 8 | NNW 11 | E 12 | ESE 9 |
| kJ | 21 | 41 | 14 | — | 8 | — | 6 | 41 | 59 | 164 | 254 | 177 | 101 | 90 | 71 | 196 | 423 | 139 | 65 |
Swell 3 Height (m) Direction Period (s) | ESE 10 | ENE 8 | — | — | — | — | ESE 13 | — | ENE 9 | ESE 12 | SSE 9 | SW 9 | S 7 | — | — | SSW 9 | E 11 | SSE 10 | E 13 |
| kJ | 10 | 23 | — | — | — | — | 18 | — | 17 | 14 | 8 | 67 | 53 | — | — | 94 | 88 | 10 | 32 |
Wind waves Height (m) Direction Period (s) | SSE 9 | ESE 6 | SSE 8 | SSE 9 | SSE 9 | SSE 9 | SSE 8 | ESE 6 | ESE 6 | ESE 6 | E 6 | E 6 | E 7 | N 5 | N 6 | NW 6 | W 8 | SW 8 | SSW 8 |
| kJ | 465 | 118 | 1223 | 2335 | 1733 | 1778 | 533 | 143 | 141 | 140 | 124 | 170 | 94 | 34 | 154 | 159 | 1448 | 1090 | 881 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 10 | 599 | 599 | 599 | 607 | 599 | 599 | 670 | 670 | 670 | 760 | 670 | 14 | 14 | 14 | 10 | 13 | 14 | 10 |
Best forecast wave conditions in Okinawa | |||||||||||||||||||
Best forecast wave conditions in Japan | |||||||||||||||||||
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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.
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