Surf Forecasts:
Yonabaru surf forecast from 29 Aug 2026:
- Most powerful swell: Wednesday 2 Sep, 9PM (local time) - 13ft (4.0m), 9s period, ESE swell with 2,275 kJ wave energy.
Best Forecast Surf Conditions for Yonabaru this week:
The most powerful waves expected at Yonabaru in the next 16 days are 4.0m 9s and forecast to arrive on Wednesday (Sep 02) at 9PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.5m 10s period and expected on Friday (Sep 04) at 12AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 9PM (Wed 2nd Sep) | 13ft (4.0m) 9s |
Table - best surf conditions forecast for Yonabaru over the next 16 days.
The Lowdown
Alright, Rusty here. Let’s break this down. The whole 16-day window is a total bust for a paddle. There isn’t a single decent session on offer. It’s a complete blank run. Conditions can shift, but this looks locked in.
The only spot in the game is Yonabaru. It’s a beginner-friendly break that’s fairly consistent, but the problem is the wind. From Saturday the 29th of August right through the first week of September, we’ve got a relentless stream of cross-onshore and onshore wind, mostly from the SE and E, howling at 15 to 28 mph. That’s turning what could be a 5.9 ft swell into a total mess. The water temp is about 83.5°F, which is normal for this time of year.
We get a little break on Friday the 4th of September morning, with a gentler cross-shore breeze and a 4.3 ft E swell, but it’s only marginal at best. The energy is weak (328) and the period is short at 9 seconds, so don’t hold your breath. After that, it’s back to poor surf with building onshore winds.
By Monday the 7th of September, the swell bumps up to a solid 9.8 ft from the E, but with a strong cross-onshore wind and a period of just 9 seconds, it’s going to be a messy, choppy wall of whitewater. On Thursday the 10th of September afternoon, the period jumps to a very long 13 seconds for a 6.9 ft E swell, which at a beach break usually means it’s too straight. With 25 mph onshore wind, it’s a no-go. The weekend of the 12th and 13th of September sees the swell drop right off to under 2.3 ft with low energy, and the wind is still onshore. There is no standout here, not one. For paddle surfing, put the board away. If you’ve got a kite, those strong onshore winds and those bigger swells (9.8 ft+) might be worth a look, but for the rest of us, it’s a total washout.
Short Range ForecastModerate rain (total 13mm), heaviest on Mon afternoon. Warm (max 29°C on Sat afternoon, min 26°C on Sun night). Mainly fresh winds. | Days 5-7 Weather SummaryHeavy rain (total 135mm), heaviest during Tue night. Warm (max 30°C on Fri morning, min 26°C on Tue night). Winds decreasing (strong winds from the SSE on Wed night, light winds from the SSE by Fri morning). | |||||||||||||||||||
Sat 29 | Sunday 30 | Monday 31 | Tuesday 1 | Wednesday 2 | Thursday 3 | Friday 4 | ||||||||||||||
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) | SE 7 | ESE 7 | ESE 7 | ESE 7 | ESE 7 | ESE 9 | ESE 9 | ESE 8 | ESE 9 | ESE 9 | ESE 8 | ESE 9 | ESE 8 | SE 9 | ESE 9 | ESE 10 | E 18 | E 9 | ESE 9 | ESE 8 |
Wave Graph  | ||||||||||||||||||||
 kJ | 293 | 136 | 121 | 141 | 167 | 662 | 858 | 865 | 1152 | 761 | 1408 | 1755 | 1204 | 1974 | 729 | 800 | 6 | 417 | 232 | 380 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | on | on | on | on | on | on | cross-on | cross-on | cross-on | cross-on | cross | cross | cross-on | cross-on | cross | cross-on | cross-on | cross-on |
High Tide | 7:57PM2.14m | 8:01AM2.21m | 8:23PM2.15m | 8:39AM2.14m | 8:50PM2.13m | 9:20AM2.02m | 9:18PM2.09m | 10:05AM1.87m | 9:49PM2.03m | 10:59AM1.71m | 10:24PM1.95m | 12:18PM1.57m | 11:11PM1.85m | |||||||
Low Tide | 1:56AM0.60m | 2:14PM0.48m | 2:31AM0.54m | 2:44PM0.61m | 3:07AM0.52m | 3:14PM0.77m | 3:47AM0.54m | 3:45PM0.94m | 4:34AM0.60m | 4:18PM1.11m | 5:32AM0.67m | 5:02PM1.28m | ||||||||
 |  | |  |  |  | |  | | | | | | | | | | | | | |
 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:09 | — | — | 6:09 | — | — |
 | 6:52 | — | — | 6:51 | — | — | 6:50 | — | — | 6:49 | — | — | 6:47 | — | — | 6:46 | — | — | 6:45 | — |
mm | — | — | — | — | — | 1 | 3 | 7 | 2 | 2 | 46 | 57 | 17 | 9 | — | 1 | 3 | — | — | — |
Temp °C | 29 | 28 | 28 | 28 | 27 | 28 | 28 | 27 | 28 | 28 | 27 | 26 | 27 | 27 | 29 | 29 | 28 | 30 | 30 | 28 |
Feels °C | 30 | 31 | 30 | 30 | 29 | 28 | 28 | 27 | 30 | 28 | 26 | 26 | 26 | 26 | 29 | 30 | 30 | 34 | 34 | 32 |
Swell 1 Height (m) Direction Period (s) | SSW 9 | SSW 9 | SSW 9 | SSW 8 | S 8 | S 9 | SSW 10 | SSW 8 | SW 9 | SSW 10 | SSW 9 | SSW 10 | SSW 10 | SSW 10 | ESE 9 | SSW 9 | SW 11 | SSW 10 | S 10 | SSW 9 |
| kJ | 138 | 232 | 199 | 154 | 68 | 61 | 80 | 55 | 31 | 132 | 156 | 338 | 469 | 310 | 729 | 307 | 176 | 680 | 552 | 308 |
Swell 2 Height (m) Direction Period (s) | E 13 | E 12 | E 12 | E 12 | SW 9 | SW 9 | SW 10 | SW 10 | SSW 8 | S 8 | SW 10 | — | — | S 9 | SSW 10 | SW 10 | E 18 | E 9 | N 7 | N 9 |
| kJ | 30 | 47 | 45 | 44 | 51 | 28 | 33 | 23 | 14 | 50 | 73 | — | — | 194 | 584 | 84 | 6 | 417 | 4 | 6 |
Swell 3 Height (m) Direction Period (s) | W 7 | W 7 | SE 10 | SE 10 | E 11 | — | — | S 8 | E 15 | E 15 | — | — | — | — | SSW 10 | S 10 | — | SW 10 | E 16 | E 16 |
| kJ | 4 | 1 | 4 | 4 | 23 | — | — | 6 | 18 | 17 | — | — | — | — | 578 | 245 | — | 80 | 5 | 5 |
Wind waves Height (m) Direction Period (s) | SE 7 | ESE 7 | ESE 7 | ESE 7 | ESE 7 | ESE 9 | ESE 9 | ESE 8 | ESE 9 | ESE 9 | ESE 8 | ESE 9 | ESE 8 | SE 9 | — | ESE 10 | SSE 10 | ESE 9 | ESE 9 | ESE 8 |
| kJ | 293 | 136 | 121 | 141 | 167 | 662 | 858 | 865 | 1152 | 761 | 1408 | 1755 | 1204 | 1974 | — | 800 | 1420 | 351 | 232 | 380 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 13 | 13 | 13 | 13 | 13 | 618 | 670 | 607 | 607 | 607 | 727 | 607 | 599 | 607 | 607 | 607 | 607 | 599 | 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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