Surf Forecasts:
Yonabaru surf forecast from 18 Aug 2026:
- Best quality surf: Saturday 22 Aug, 12AM (local time) - 11ft (3.5m), 9s period, SE swell with cross-onshore winds.
- Most powerful swell: Wednesday 26 Aug, 12AM (local time) - 10ft (3.0m), 16s period, ESE swell with 4,288 kJ wave energy.
- Next surfable swell (1★+): Friday 21 Aug, 12PM (local time) - 5ft (1.6m), 7s 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 Friday (Aug 21) at 12PM. The primary swell is predicted to be 1.6m and 7s 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 3.0m 16s and forecast to arrive on Wednesday (Aug 26) at 12AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 5.5m 11s period and expected on Sunday (Aug 23) at 3AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12PM (Fri 21st Aug) | 5ft (1.6m) 7s |
| Best Surf | 12AM (Sat 22nd Aug) | 11ft (3.5m) 9s |
| Most Powerful | 12AM (Wed 26th Aug) | 10ft (3.0m) 16s |
Table - best surf conditions forecast for Yonabaru over the next 16 days.
The Lowdown
Alright folks, Rusty here with the lowdown for Yonabaru. It's a grim start on Wednesday the 19th, with strong onshore winds and stormy skies making a mess of things. We're looking at a solid stretch of poor surf that just keeps on going, day after day. The wind is stuck out of the east and southeast, meaning choppy, blown-out conditions. The lineup will be empty for a reason – it’s just not worth it.
There’s a small tease on Monday the 24th when a long-period swell (16 seconds) from the ESE shows up, hitting around 2.0m by Tuesday afternoon, with a combined energy of 2210. Sounds good, right? Wrong. The wind is still howling onshore, so it's a total washout. Don't bother.
Now, hang in there, because the real window opens on Saturday the 29th. That morning we’ve got a 1.4m swell from the north, with an 11-second period, and finally some clean offshore wind out of the WNW. The energy is a moderate 498, but the wind is fresh and offshore – the waves will have some proper shape. That afternoon is even better: 1.5m from the NNW, 10-second period, moderate offshore breeze, and the energy bumps up to 517. Clean as a whistle. This is the one to circle on your calendar.
Don't forget Tuesday the 1st of September either. The morning brings a very long-period groundswell from the ESE at 17 seconds, but only 0.9m. The energy is still a solid 675, and with a light offshore wind, it'll be glassy. That afternoon, the swell picks up to 1.7m from the ESE, the period drops to 14 seconds, and the combined energy jumps to 1122. Light winds again, making for clean, lined-up waves. Just a heads-up: with that long period, the waves might be a little fast and straight at a beach break, but the quality will be high.
Crowds can turn up sometimes at Yonabaru, but with this forecast, you'll have it mostly to yourself. The water temp is about 84°F, which is normal for this time of year.
Other than that prime weekend and the start of September, it’s a long, dry spell. Be patient and aim for the 29th and 1st.
Rusty.
Short Range ForecastHeavy rain (total 48mm), heaviest during Fri night. Warm (max 28°C on Wed morning, min 26°C on Fri night). Wind will be generally light. | Days 4-6 Weather SummaryHeavy rain (total 31mm), heaviest during Sun night. Warm (max 28°C on Mon morning, min 26°C on Sat morning). Winds increasing (light winds from the SE on Sat afternoon, near gales from the E by Sun morning). | ||||||||||||||||||||
Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | |||||||||||||||
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 7 | E 7 | ESE 8 | ESE 7 | ESE 7 | ESE 7 | SE 7 | ESE 7 | SE 9 | SSE 10 | SSE 10 | SSE 11 | SSE 10 | SSE 10 | SSE 11 | ENE 11 | ESE 16 | E 15 | ESE 16 | ESE 16 | ESE 16 |
Wave Graph  | |||||||||||||||||||||
 kJ | 269 | 218 | 288 | 343 | 294 | 215 | 330 | 117 | 1608 | 0 | 0 | 0 | 0 | 0 | 0 | 41 | 223 | 1989 | 1575 | 1928 | 4288 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | on | on | cross-on | cross-on | cross | cross-on | cross | cross-on | cross-on | cross-on | cross-on | on | cross-on | cross-on | on | on | on | on | cross-on | cross |
High Tide | 10:40AM1.79m | 10:31PM1.99m | 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 | ||||||||
Low Tide | 4:20PM0.97m | 5:20AM0.70m | 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 | ||||||||
 | |  | | | | | | | | | | | |  |  |  |  | | |  | |
 | 6:01 | — | — | 6:03 | — | — | 6:03 | — | — | 6:03 | — | — | 6:03 | — | — | 6:05 | — | — | 6:05 | — | — |
 | — | 7:01 | — | — | 7:00 | — | — | 7:00 | — | — | 6:59 | — | — | 6:58 | — | — | 6:57 | — | — | 6:55 | — |
mm | 2 | 2 | 6 | 5 | 5 | 7 | 4 | 5 | 12 | 2 | 2 | 8 | 1 | 8 | 10 | — | — | — | — | — | — |
Temp °C | 28 | 28 | 28 | 28 | 27 | 27 | 28 | 28 | 27 | 26 | 27 | 27 | 27 | 26 | 27 | 28 | 28 | 27 | 29 | 29 | 27 |
Feels °C | 30 | 30 | 30 | 30 | 29 | 29 | 32 | 32 | 32 | 25 | 32 | 26 | 23 | 22 | 24 | 26 | 27 | 27 | 30 | 30 | 28 |
Swell 1 Height (m) Direction Period (s) | SW 8 | S 8 | S 8 | S 10 | S 9 | ESE 7 | SSW 9 | SSW 9 | SSW 10 | SW 10 | SW 10 | SW 11 | SW 11 | SW 10 | SW 11 | SW 11 | SSE 10 | SSE 9 | ESE 16 | ESE 16 | ESE 16 |
| kJ | 18 | 11 | 35 | 113 | 159 | 215 | 222 | 343 | 246 | 276 | 260 | 229 | 187 | 180 | 119 | 115 | 983 | 466 | 1575 | 1928 | 4288 |
Swell 2 Height (m) Direction Period (s) | S 7 | SW 8 | SW 8 | SW 9 | SW 9 | ENE 7 | ENE 8 | ESE 7 | — | — | — | — | W 7 | W 7 | — | ENE 11 | SSW 10 | SW 10 | S 9 | S 10 | SSW 10 |
| kJ | 4 | 10 | 10 | 12 | 12 | 45 | 14 | 117 | — | — | — | — | 4 | 9 | — | 41 | 130 | 100 | 264 | 216 | 132 |
Swell 3 Height (m) Direction Period (s) | S 8 | S 7 | SW 8 | — | SW 9 | SW 9 | ENE 8 | ESE 9 | — | — | — | — | — | — | — | ESE 14 | ESE 16 | SW 10 | SW 10 | SW 10 | SSE 8 |
| kJ | 1 | 1 | 24 | — | 39 | 50 | 26 | 25 | — | — | — | — | — | — | — | 19 | 223 | 124 | 154 | 79 | 32 |
Wind waves Height (m) Direction Period (s) | E 7 | E 7 | ESE 8 | ESE 7 | ESE 7 | S 9 | SE 7 | — | SE 9 | SSE 10 | SSE 10 | SSE 11 | SSE 10 | SSE 10 | SSE 11 | SSE 10 | E 6 | E 15 | E 7 | E 7 | — |
| kJ | 269 | 218 | 288 | 343 | 294 | 181 | 330 | — | 1608 | 3430 | 2736 | 5640 | 4159 | 2233 | 3195 | 2426 | 213 | 1989 | 255 | 282 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 670 | 18 | 13 | 607 | 13 | 13 | 13 | 599 | 607 | 607 | 16 | 599 | 599 | 622 | 599 | 634 | 820 | 607 | 14 | 670 | 616 |
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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