Surf Forecasts:
Yonabaru surf forecast from 20 Aug 2026:
- Best quality surf: Wednesday 26 Aug, 3AM (local time) - 6ft (1.9m), 13s period, E swell with cross-offshore winds.
- Most powerful swell: Monday 24 Aug, 6PM (local time) - 11ft (3.5m), 17s period, ESE swell with 6,262 kJ wave energy.
- Next surfable swell (1★+): Wednesday 26 Aug, 3AM (local time) - 6ft (1.9m), 13s 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 26) at 3AM. The primary swell is predicted to be 1.9m and 13s period with a secondary swell of 0.7m and 5s. 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 3.5m 17s and forecast to arrive on Monday (Aug 24) at 6PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 3.5m 9s period and expected on Friday (Aug 21) at 9PM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3AM (Wed 26th Aug) | 6ft (1.9m) 13s |
| Best Surf | 3AM (Wed 26th Aug) | 6ft (1.9m) 13s |
| Most Powerful | 6PM (Mon 24th Aug) | 11ft (3.5m) 17s |
Table - best surf conditions forecast for Yonabaru over the next 16 days.
The Lowdown
G’day, Rusty here. Look, I’ll be straight with you—this outlook for Yonabaru is a rough one. We’ve got a long stretch of poor conditions ahead, with only a couple of windows that might get your hopes up. The water’s sitting at a pretty normal 84°, nothing unusual for this time of year.
The first real chance of anything decent doesn’t show up until Wednesday the 26th of August. That morning, we’ll see a 5ft swell rolling in from the ENE with a period of 12 seconds, carrying moderate energy (794). The wind will be a light cross-offshore from the NW, keeping things clean. That’s your best bet in the whole run—a nice, clean window for a surf. But keep in mind, Yonabaru is a beginner-friendly spot that’s fairly consistent, so this swell might be a bit small for more experienced surfers, but it’s nice and clean.
After that, it’s back to poor conditions with cross-onshore winds and small, weak swells through to the end of August and into early September. There’s a gap of several days with no recommendations.
Then, on Thursday the 3rd of September, the afternoon shows a glimmer with a 6ft swell from the ENE, 8-second period, moderate energy (376), and a cross-offshore wind from the north, so it’s clean. But the swell is short-period and the quality’s still questionable.
The real standout, though, comes on Friday the 4th of September. The afternoon brings a 7ft swell from the east, 9-second period, with moderate energy (755) and a light cross-offshore breeze from the NNW. That’s looking clean and promising—a proper session for those who can wait. The swell’s a bit bigger, so it might be pushing into intermediate territory, but the wind and conditions are set to be good.
Overall, the best on offer is Wednesday the 26th of August morning or Friday the 4th of September afternoon. The rest? It’s a tough stretch with a lot of poor surf and messy winds. Stay patient, and keep an eye on those forecasts.
Stay salty,
Rusty
Short Range ForecastHeavy rain (total 45mm), heaviest during Fri afternoon. Warm (max 29°C on Thu morning, min 25°C on Fri afternoon). Winds increasing (light winds from the ESE on Thu afternoon, strong winds from the SE by Fri afternoon). | Days 4-6 Weather SummaryModerate rain (total 19mm), heaviest on Sun night. Warm (max 29°C on Tue morning, min 26°C on Sun night). Winds decreasing (fresh winds from the ESE on Sun night, light winds from the N by Tue night). | ||||||||||||||||||||
Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | |||||||||||||||
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) | ESE 8 | ESE 7 | ESE 6 | SE 7 | SE 7 | ENE 9 | SSE 9 | SSE 9 | ESE 10 | E 6 | E 6 | SE 10 | E 18 | E 18 | ESE 16 | E 16 | E 14 | E 13 | ENE 12 | ENE 13 | ENE 11 |
Wave Graph  | |||||||||||||||||||||
 kJ | 238 | 173 | 123 | 314 | 817 | 8 | 0 | 0 | 21 | 110 | 288 | 2137 | 2686 | 4528 | 2616 | 3567 | 3471 | 1533 | 794 | 405 | 97 |
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 | cross-on | cross-on | on | on | on | on | on | on | on | on | cross | cross-off | cross-off | cross-off |
High Tide | 11:45AM1.63m | 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 | 4:58PM1.15m | 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 | — | — | 6:03 | — | — | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — |
 | — | 7:00 | — | — | 7:00 | — | — | 6:59 | — | — | 6:58 | — | — | 6:57 | — | — | 6:55 | — | — | 6:54 | — |
mm | 3 | 2 | 9 | 3 | 12 | 6 | 4 | 2 | 4 | 2 | 2 | 4 | 2 | 2 | 4 | 2 | 1 | — | — | — | — |
Temp °C | 29 | 28 | 27 | 27 | 27 | 27 | 28 | 28 | 27 | 28 | 28 | 27 | 27 | 27 | 28 | 29 | 29 | 27 | 29 | 29 | 27 |
Feels °C | 32 | 30 | 30 | 29 | 24 | 26 | 27 | 27 | 27 | 29 | 28 | 28 | 27 | 27 | 30 | 31 | 32 | 32 | 31 | 32 | 32 |
Swell 1 Height (m) Direction Period (s) | S 9 | S 9 | S 9 | SW 8 | SW 8 | SW 10 | SW 10 | SW 10 | ESE 10 | S 10 | S 10 | ESE 16 | SSE 9 | SSE 8 | ESE 16 | E 16 | E 14 | E 13 | ENE 12 | ENE 13 | S 9 |
| kJ | 111 | 189 | 225 | 54 | 82 | 115 | 318 | 217 | 21 | 930 | 855 | 487 | 937 | 388 | 2616 | 3567 | 3471 | 1533 | 794 | 405 | 78 |
Swell 2 Height (m) Direction Period (s) | SW 9 | SW 9 | ESE 11 | ENE 8 | SSW 8 | ENE 9 | SW 10 | — | E 16 | E 18 | ESE 17 | ENE 13 | ESE 18 | SSW 10 | SSW 10 | SE 7 | SSW 10 | S 10 | SSW 10 | S 10 | ENE 11 |
| kJ | 12 | 12 | 12 | 21 | 7 | 8 | 318 | — | 5 | 6 | 112 | 17 | 2181 | 107 | 133 | 126 | 154 | 154 | 72 | 94 | 97 |
Swell 3 Height (m) Direction Period (s) | SSE 10 | ENE 8 | SW 9 | — | — | — | — | — | — | E 18 | E 14 | — | SW 10 | — | — | SSW 10 | SE 7 | SE 10 | SSE 8 | SW 10 | E 13 |
| kJ | 100 | 27 | 51 | — | — | — | — | — | — | 6 | 16 | — | 102 | — | — | 154 | 79 | 15 | 21 | 15 | 32 |
Wind waves Height (m) Direction Period (s) | ESE 8 | ESE 7 | ESE 6 | SE 7 | SE 7 | SSE 9 | SSE 9 | SSE 9 | SSE 9 | E 6 | E 6 | SE 10 | E 18 | E 18 | SE 8 | NE 8 | — | N 6 | — | NNW 5 | NNW 6 |
| kJ | 238 | 173 | 123 | 314 | 817 | 1695 | 1647 | 1774 | 993 | 110 | 288 | 2137 | 2686 | 4528 | 733 | 64 | — | 31 | — | 28 | 33 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 13 | 13 | 13 | 13 | 599 | 599 | 607 | 607 | 599 | 634 | 820 | 599 | 760 | 727 | 13 | 14 | 14 | 13 | 0 | 14 | 0 |
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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