Surf Forecasts:
Yonabaru surf forecast from 8 Aug 2026:
- Best quality surf: Wednesday 12 Aug, 6AM (local time) - 2.5ft (0.7m), 11s period, E swell with cross-offshore winds.
- Most powerful swell: Monday 10 Aug, 6AM (local time) - 3.5ft (1.0m), 14s period, E swell with 395 kJ wave energy.
- Next surfable swell (1★+): Wednesday 12 Aug, 6AM (local time) - 2.5ft (0.7m), 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 0.7m 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 1.0m 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 4.5m 12s period and expected on Sunday (Aug 09) at 3AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6AM (Wed 12th Aug) | 2.5ft (0.7m) 11s |
| Best Surf | 6AM (Wed 12th Aug) | 2.5ft (0.7m) 11s |
| Most Powerful | 6AM (Mon 10th Aug) | 3.5ft (1.0m) 14s |
Table - best surf conditions forecast for Yonabaru over the next 16 days.
The Lowdown
G’day, Rusty here, and I’ve got to be straight with ya – the outlook for the next 16 days at Yonabaru is a tough one. There’s just no decent surf on the cards. It’s a pretty prolonged flat spell, and you’re looking at a gap that runs from now, from the start of the period, all the way through to the end of the forecast on August 24th. There’s no standout sessions, not even a single day I’d recommend paddling out for.
The first few days, from Sunday the 9th through the 11th, are a write-off. You’ve got a messy east swell around 2 ft to 3 ft, but the wind is swinging from a strong SSE breeze at 25 mph down to a moderate SE onshore flow. That’s a cross to cross-onshore mess, with lumpy chop. The combined swell energy is weak to moderate (around 133 to 363), but the poor surf conditions just kill it. Water temp? No anomaly mentioned, so it’s about average for the time of year.
The middle of the week, Wednesday the 12th, offers the closest thing to a glimmer. The swell drops to 2 ft from the east, period around 11 seconds, and the wind goes light – even glassy in the afternoon. That’s clean as, and the combined energy is weak (83). But it’s small, inconsistent, and the rating is a 2/5 for a beginner break. It’s technically surfable, but “ordinary” is the word. It’s not worth getting excited about. From Thursday the 13th onward, the swell shrinks further to 2 ft or less, and the onshore easterly winds pick up again, especially by Friday the 21st when a strong 28 mph ESE breeze makes it a total mess. The combined energy drops to weak two-digit numbers, and the period goes short (6 to 10 seconds) or very long and weak (15 seconds on the 23rd), which is just straight close-outs at a beach break.
Yonabaru is a beginner-friendly, fairly consistent break that’s fairly exposed to swell, but nothing in this window lines up. The only positive is that it’s a fairly consistent spot, so it tends not to stay this poor for long. Forecasts can change. But for now, leave the board at home. This setup with the strong cross-shore winds and chop actually looks more interesting for kite surfing than paddle surfing.
- Rusty
Short Range ForecastHeavy rain (total 20mm), heaviest during Sun morning. Warm (max 31°C on Tue morning, min 27°C on Sat night). Winds decreasing (near gales from the SSE on Sat night, light winds from the SSE by Mon night). | Days 5-7 Weather SummaryLight rain (total 7mm), mostly falling on Wed afternoon. Warm (max 30°C on Thu afternoon, min 27°C on Tue night). Wind will be generally light. | ||||||||||||||||||
Sunday 9 | Monday 10 | Tuesday 11 | Wednesday 12 | Thursday 13 | Friday 14 | ||||||||||||||
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 10 | E 10 | E 9 | E 14 | E 14 | E 13 | E 12 | E 12 | E 12 | E 12 | E 11 | E 11 | E 10 | E 10 | E 10 | E 6 | ESE 6 | ESE 6 | E 6 |
Wave Graph  | |||||||||||||||||||
 kJ | 96 | 116 | 81 | 136 | 363 | 280 | 306 | 229 | 136 | 129 | 88 | 83 | 49 | 51 | 51 | 41 | 40 | 31 | 27 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross | cross-on | cross-on | cross-on | cross-on | cross-on | cross | cross | cross-off | glassy | glassy | cross | cross-off | cross | glassy | on | cross-on |
High Tide | 2:39AM1.85m | 5:27PM1.74m | 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 | |||||||
Low Tide | 10:14AM0.55m | 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 | |||||||
 |  | | | | | |  |  |  |  | | | | | | | | | |
 | — | 5:58 | — | — | 5:58 | — | — | 5:58 | — | — | 5:58 | — | — | 5:58 | — | — | 6:00 | — | — |
 | 7:10 | — | 7:09 | — | — | 7:08 | — | — | 7:08 | — | — | 7:07 | — | — | 7:07 | — | — | 7:06 | — |
mm | 3 | 5 | 5 | 3 | 2 | 1 | 1 | — | — | — | — | 2 | 2 | 1 | 2 | — | — | — | 3 |
Temp °C | 29 | 28 | 28 | 28 | 29 | 29 | 28 | 31 | 30 | 28 | 28 | 29 | 28 | 29 | 30 | 27 | 30 | 30 | 27 |
Feels °C | 25 | 28 | 28 | 28 | 32 | 32 | 31 | 34 | 33 | 33 | 33 | 34 | 33 | 33 | 33 | 31 | 34 | 34 | 31 |
Swell 1 Height (m) Direction Period (s) | E 10 | SW 12 | WSW 12 | W 11 | SW 11 | S 10 | S 11 | S 10 | S 10 | S 9 | SSW 9 | S 9 | S 8 | S 9 | SW 8 | SSW 9 | SSW 8 | SW 9 | SSW 9 |
| kJ | 96 | 1600 | 902 | 235 | 650 | 850 | 798 | 580 | 494 | 459 | 344 | 188 | 173 | 120 | 100 | 232 | 190 | 110 | 168 |
Swell 2 Height (m) Direction Period (s) | E 15 | E 10 | E 9 | E 8 | E 14 | SW 11 | SW 11 | SW 11 | SW 10 | E 12 | E 11 | SW 9 | SW 10 | SW 8 | S 8 | E 6 | ESE 6 | S 8 | E 6 |
| kJ | 17 | 116 | 81 | 69 | 363 | 579 | 384 | 249 | 204 | 129 | 88 | 119 | 108 | 120 | 92 | 11 | 40 | 63 | 27 |
Swell 3 Height (m) Direction Period (s) | ENE 15 | E 15 | E 15 | E 14 | W 10 | E 13 | E 12 | E 12 | E 12 | SW 10 | E 5 | E 11 | E 10 | E 10 | E 10 | E 10 | W 8 | ESE 6 | S 8 |
| kJ | 43 | 17 | 38 | 136 | 130 | 280 | 306 | 229 | 136 | 61 | 5 | 83 | 49 | 51 | 51 | 31 | 18 | 31 | 12 |
Wind waves Height (m) Direction Period (s) | S 11 | S 10 | S 10 | S 10 | S 10 | — | — | — | — | — | — | — | — | — | — | E 6 | — | — | — |
| kJ | 6728 | 1702 | 1852 | 2072 | 1144 | — | — | — | — | — | — | — | — | — | — | 41 | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 619 | 616 | 599 | 599 | 76 | 10 | 10 | 10 | 13 | 10 | 0 | 0 | 13 | 13 | 12 | 13 | 13 | 13 | 13 |
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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