Surf Forecasts:
Yonabaru surf forecast from 29 Aug 2026:
- Best quality surf: Wednesday 2 Sep, 12AM (local time) - 11ft (3.5m), 9s period, ESE swell with cross-shore winds.
- Most powerful swell: Thursday 3 Sep, 3AM (local time) - 10ft (3.0m), 11s period, ESE swell with 2,235 kJ wave energy.
- Next surfable swell (1★+): Wednesday 2 Sep, 12AM (local time) - 11ft (3.5m), 9s 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 Wednesday (Sep 02) at 12AM. The primary swell is predicted to be 3.5m and 9s period. The wind is predicted to be cross-shore as the swell arrives.
The most powerful waves expected at Yonabaru in the next 16 days are 3.0m 11s and forecast to arrive on Thursday (Sep 03) at 3AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.7m 9s period and expected on Tuesday (Sep 01) at 12PM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12AM (Wed 2nd Sep) | 11ft (3.5m) 9s |
| Best Surf | 12AM (Wed 2nd Sep) | 11ft (3.5m) 9s |
| Most Powerful | 3AM (Thu 3rd Sep) | 10ft (3.0m) 11s |
Table - best surf conditions forecast for Yonabaru over the next 16 days.
The Lowdown
G'day, Rusty here, and I gotta be straight with you—this 16-day stretch for Yonabaru is a tough one. We're looking at a long stretch of onshore and cross-shore winds that are gonna mess up what could be decent swell. The water's sitting at 84°F, which is pretty much spot on for this time of year, so at least that's comfortable.
Right now, we kick off the 29th of August with a 6ft SE swell, but it's short-period at 7 seconds and hammered by a 16 mph cross-on wind. The combined energy's moderate at 402, but it's choppy and blown out. Through the weekend and into the 31st, the wind stays on or cross-on, and the swell climbs to 10ft on the 31st with strong energy (1317), but it's coming with 25 mph easterly gales and a risk of thunderstorms. That's messy, not surfable.
We hit a bit of a turning point on the 2nd of September. Wednesday afternoon sees a 10ft ESE swell with a 12-second period—that's proper groundswell energy, and the combined energy jumps to 2056, which is strong. The wind switches to a light cross-off from the SSW at 16 mph, and the wave comment calls it "clean." That's the one standout in this whole outlook. Yonabaru is a beach break, so a long-period 12-second swell like that can make it a bit straight, but in clean conditions, it's worth a look. The rating suggests it's a beginner-friendly spot, and the crowds are only "sometimes" an issue, so you might have it to yourself. Just be aware, the swell is over 8ft, so this is expert territory.
After that, it's back to poor conditions. The 3rd and 4th drop to small, weak swells with cross-shore chop. The 5th and 6th are small and wind-affected. Then on the 7th of September, we get a typhoon-like situation with 65 mph onshore winds and a 5ft E swell—totally unridable. The 8th and 9th are still messy with strong winds. The 10th is small and choppy. The 11th of September picks up a 7ft ESE swell with gentle winds and 1398 energy, but it's still cross-on and only a marginal call. The 12th and 13th tail off into small, short-period onshore slop.
So, the only real window is the afternoon of the 2nd of September. The rest is a write-off. If you're not a kite surfer, don't even bother—the strong winds and choppy surf on the beach setup make this more interesting for kites than paddling.
Rusty.
Short Range ForecastModerate rain (total 14mm), heaviest on Mon night. Warm (max 29°C on Sat morning, min 27°C on Sat night). Mainly strong winds. | Days 4-6 Weather SummaryHeavy rain (total 69mm), heaviest during Tue night. Warm (max 29°C on Thu morning, min 26°C on Tue night). Mainly strong winds. | ||||||||||||||||||||
Saturday 29 | Sunday 30 | Monday 31 | Tuesday 1 | Wednesday 2 | Thursday 3 | Friday 4 | |||||||||||||||
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) | SE 7 | SE 7 | ESE 7 | ESE 7 | ESE 7 | ESE 9 | ESE 8 | ESE 9 | ESE 9 | ESE 8 | ESE 8 | ESE 9 | ESE 9 | ESE 9 | ENE 11 | ESE 11 | E 10 | E 10 | E 9 | E 10 | E 9 |
Wave Graph  | |||||||||||||||||||||
 kJ | 313 | 239 | 153 | 145 | 168 | 522 | 936 | 1382 | 921 | 645 | 995 | 1915 | 1406 | 993 | 1208 | 936 | 620 | 459 | 300 | 307 | 241 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-on | on | on | on | on | on | cross-on | cross-on | cross-on | cross | cross-on | cross-on | cross | cross-on | cross-on | cross | cross | 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 | 1:44PM0.38m | 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 | — | — | 6:07 | — | — | 6:09 | — | — | 6:09 | — | — |
 | — | 6:52 | — | — | 6:51 | — | — | 6:50 | — | — | 6:49 | — | — | 6:47 | — | — | 6:46 | — | — | 6:45 | — |
mm | — | — | — | — | — | 2 | 3 | 4 | 5 | 3 | 5 | 35 | 4 | 9 | 8 | 1 | — | 4 | 1 | 2 | — |
Temp °C | 29 | 29 | 28 | 28 | 28 | 27 | 28 | 28 | 28 | 28 | 28 | 27 | 28 | 28 | 28 | 29 | 29 | 28 | 30 | 30 | 28 |
Feels °C | 31 | 31 | 31 | 30 | 29 | 27 | 28 | 28 | 29 | 28 | 30 | 28 | 29 | 30 | 29 | 30 | 30 | 30 | 34 | 34 | 33 |
Swell 1 Height (m) Direction Period (s) | SSW 9 | SSW 9 | SSW 9 | SSW 9 | SSW 8 | SSW 8 | SSW 8 | SSW 10 | SSW 9 | S 9 | S 9 | S 10 | SSW 10 | SSW 10 | ENE 11 | ESE 11 | E 10 | E 10 | S 10 | S 10 | S 10 |
| kJ | 110 | 141 | 222 | 158 | 127 | 78 | 55 | 72 | 58 | 230 | 508 | 487 | 407 | 250 | 1208 | 936 | 620 | 459 | 596 | 530 | 440 |
Swell 2 Height (m) Direction Period (s) | S 7 | E 13 | E 12 | E 12 | E 12 | SW 9 | SW 9 | SW 9 | SW 10 | SW 10 | SW 10 | — | SW 12 | S 11 | ESE 12 | SSW 10 | SSW 10 | S 10 | E 9 | E 10 | E 9 |
| kJ | 54 | 30 | 47 | 45 | 44 | 29 | 13 | 23 | 17 | 48 | 25 | — | 37 | 233 | 1063 | 433 | 416 | 392 | 300 | 307 | 241 |
Swell 3 Height (m) Direction Period (s) | E 13 | W 7 | W 7 | W 6 | ENE 12 | S 10 | — | — | S 8 | SSW 12 | E 15 | — | — | — | SSW 10 | N 7 | N 7 | SW 11 | N 9 | NNW 9 | N 9 |
| kJ | 31 | 4 | 1 | 1 | 79 | 8 | — | — | 13 | 46 | 18 | — | — | — | 478 | 24 | 15 | 119 | 28 | 26 | 27 |
Wind waves Height (m) Direction Period (s) | SE 7 | SE 7 | ESE 7 | ESE 7 | ESE 7 | ESE 9 | ESE 8 | ESE 9 | ESE 9 | ESE 8 | ESE 8 | ESE 9 | ESE 9 | ESE 9 | — | — | — | — | — | — | — |
| kJ | 313 | 239 | 153 | 145 | 168 | 522 | 936 | 1382 | 921 | 645 | 995 | 1915 | 1406 | 993 | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 13 | 13 | 13 | 13 | 13 | 703 | 670 | 607 | 765 | 607 | 607 | 618 | 607 | 607 | 599 | 607 | 634 | 599 | 607 | 607 | 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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