Surf Forecasts:
Yonabaru surf forecast from 28 Aug 2026:
- Best quality surf: Wednesday 2 Sep, 12AM (local time) - 7ft (2.2m), 10s period, E swell with cross-offshore winds.
- Most powerful swell: Monday 31 Aug, 12PM (local time) - 11ft (3.5m), 9s period, ESE swell with 2,028 kJ wave energy.
- Next surfable swell (1★+): Wednesday 2 Sep, 12AM (local time) - 7ft (2.2m), 10s 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 (Sep 02) at 12AM. The primary swell is predicted to be 2.2m and 10s 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 3.5m 9s and forecast to arrive on Monday (Aug 31) at 12PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.5m 10s period and expected on Thursday (Sep 03) at 12AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12AM (Wed 2nd Sep) | 7ft (2.2m) 10s |
| Best Surf | 12AM (Wed 2nd Sep) | 7ft (2.2m) 10s |
| Most Powerful | 12PM (Mon 31st Aug) | 11ft (3.5m) 9s |
Table - best surf conditions forecast for Yonabaru over the next 16 days.
The Lowdown
G'day, Rusty here. Let's get into what's coming up for the Yonabaru area.
To be straight with you, it's a rough start. We're looking at a solid week of blown-out, choppy conditions. From Saturday, August 29th, we’ve got a 6ft ESE swell with a short, weak 7-second period and a 16 mph cross-on wind, making for poor surf. This pattern doesn't let up. The energy is low, and the wind stays onshore or cross-onshore, gusting up to 25 mph, with thunderstorms likely through the end of August.
There's a real drought here with no solid rides until the second week of the forecast. For Yonabaru, the first sign of something slightly better doesn't pop up until Thursday, September 3rd. The swell isn't big, but the wind switches to a cross-offshore from the SSW at 16 mph, cleaning the surface right up.
Thursday, September 3rd is your best bet, but even then, it's a *marginal* call. There'll be a 6ft easterly swell with a period stretching to 10 seconds, giving the waves a bit more shape. The combined energy is still weak, but with that clean wind, the morning session is your only real option. The water temperature is about average for this time of year.
Friday, September 4th morning also gets a nod, with lighter winds and clean conditions on a 4ft easterly swell, but it's pretty ordinary. Think longboard or foiler territory. The rest of the week gets wrecked again by strong winds, with a few days seeing solid 8ft to 11ft swell, but with onshore winds and short periods, it's just a messy, dangerous closeout. For beginners, anything over 5ft with these winds is a challenge, and over 8ft with onshore wind is strictly for the experts who don't mind a beating.
Into the second week, the pattern stays poor. The last days show some clean-up wind on September 8th, but the swell is small and the winds are gale-force, so it's not worth the paddle. Honestly, those windy days with bigger swell might be more fun for kitesurfers than surfers. For the rest of us, it's a long, quiet stretch. This kind of blank run is pretty normal for the area when the wind sets in.
Rusty.
Short Range ForecastModerate rain (total 17mm), heaviest on Sun afternoon. Warm (max 29°C on Sat morning, min 27°C on Sat night). Winds increasing (moderate winds from the E on Sat night, strong winds from the ESE by Mon morning). | Days 5-7 Weather SummaryHeavy rain (total 33mm), heaviest during Tue night. Warm (max 29°C on Wed afternoon, min 26°C on Tue night). Mainly fresh winds. | ||||||||||||||||||
Saturday 29 | Sunday 30 | Monday 31 | Tuesday 1 | Wednesday 2 | Thursday 3 | ||||||||||||||
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 | SE 7 | ESE 7 | E 7 | E 8 | ESE 10 | E 9 | ESE 9 | E 8 | E 8 | E 9 | E 10 | ESE 9 | ESE 10 | E 10 | E 10 | ESE 9 | ESE 10 |
Wave Graph  | |||||||||||||||||||
 kJ | 463 | 329 | 248 | 132 | 206 | 471 | 1337 | 1684 | 1581 | 451 | 836 | 985 | 967 | 329 | 684 | 643 | 596 | 254 | 328 |
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 | cross-on | on | cross-on | cross-on | cross | cross-on | cross-off | cross-on | cross | cross | cross-off | cross-off | cross-off |
High Tide | 7:23AM2.23m | 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 | |||||||
Low Tide | 1:22AM0.69m | 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 | |||||||
 |  | |  |  |  |  | | | | | | | | | | | | | |
 | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:09 | — | — |
 | 6:52 | — | 6:52 | — | — | 6:51 | — | — | 6:50 | — | — | 6:49 | — | — | 6:47 | — | — | 6:46 | — |
mm | — | — | — | — | — | 3 | 5 | 6 | 3 | 6 | 4 | 4 | 9 | 3 | 3 | — | 2 | 2 | 7 |
Temp °C | 28 | 29 | 29 | 28 | 28 | 28 | 27 | 27 | 28 | 28 | 28 | 28 | 27 | 28 | 29 | 28 | 29 | 29 | 27 |
Feels °C | 29 | 31 | 31 | 31 | 28 | 28 | 27 | 26 | 28 | 28 | 30 | 30 | 31 | 29 | 32 | 30 | 31 | 31 | 31 |
Swell 1 Height (m) Direction Period (s) | SW 9 | SSW 9 | SSW 9 | SSW 9 | SSW 9 | SSW 9 | SSW 8 | SSW 9 | SSW 10 | S 8 | S 11 | S 10 | E 10 | SSW 10 | SSW 10 | E 10 | E 10 | SSW 10 | SSW 10 |
| kJ | 83 | 110 | 127 | 189 | 166 | 137 | 82 | 46 | 55 | 240 | 695 | 578 | 967 | 610 | 826 | 643 | 596 | 562 | 473 |
Swell 2 Height (m) Direction Period (s) | W 8 | S 7 | E 13 | E 12 | W 6 | SW 9 | SW 9 | S 11 | SW 10 | S 11 | SW 10 | E 14 | — | ESE 9 | E 10 | — | N 8 | ESE 9 | ESE 10 |
| kJ | 33 | 66 | 30 | 47 | 1 | 67 | 13 | 21 | 16 | 85 | 25 | 16 | — | 329 | 666 | — | 1 | 254 | 328 |
Swell 3 Height (m) Direction Period (s) | W 8 | E 13 | W 7 | W 7 | ENE 12 | — | — | S 8 | — | SSW 11 | — | SW 10 | — | E 11 | — | — | — | E 11 | W 6 |
| kJ | 12 | 31 | 4 | 1 | 82 | — | — | 6 | — | 39 | — | 47 | — | 146 | — | — | — | 121 | 20 |
Wind waves Height (m) Direction Period (s) | SE 7 | ESE 7 | SE 7 | ESE 7 | E 7 | E 8 | ESE 10 | E 9 | ESE 9 | E 8 | E 8 | E 9 | S 10 | — | ESE 10 | S 10 | SSW 10 | — | — |
| kJ | 463 | 329 | 248 | 132 | 206 | 471 | 1337 | 1684 | 1581 | 451 | 836 | 985 | 530 | — | 684 | 1386 | 746 | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 599 | 13 | 607 | 13 | 670 | 1011 | 616 | 670 | 785 | 756 | 820 | 785 | 0 | 727 | 607 | 607 | 607 | 607 | 607 |
Best forecast wave conditions in Okinawa | |||||||||||||||||||
Best forecast wave conditions in Japan | |||||||||||||||||||
Header Global | |||||||||||||||||||
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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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