Surf Forecasts:
Yonabaru surf forecast from 25 Aug 2026:
- Best quality surf: Wednesday 2 Sep, 12AM (local time) - 15ft (4.5m), 9s period, NNW swell with cross-offshore winds.
- Most powerful swell: Wednesday 2 Sep, 3AM (local time) - 16ft (5.0m), 9s period, NNW swell with 4,009 kJ wave energy.
- Next surfable swell (1★+): Wednesday 2 Sep, 12AM (local time) - 15ft (4.5m), 9s period with NNW 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 4.5m and 9s period with a secondary swell of 3.0m and 13s. 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 5.0m 9s and forecast to arrive on Wednesday (Sep 02) at 3AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 3.0m 8s period and expected on Wednesday (Aug 26) at 3AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12AM (Wed 2nd Sep) | 15ft (4.5m) 9s |
| Best Surf | 12AM (Wed 2nd Sep) | 15ft (4.5m) 9s |
| Most Powerful | 3AM (Wed 2nd Sep) | 16ft (5.0m) 9s |
Table - best surf conditions forecast for Yonabaru over the next 16 days.
The Lowdown
Alright, let's have a look at the charts for the next couple of weeks here.
First up, I gotta be straight with you – the next week or so is looking pretty bleak. We’ve got a whole lot of nothing good on the cards. From Wednesday the 26th of August right through to the end of the month, the wind is just junk. It’s ripping from the south and southeast, mostly cross-off or onshore, and slapping the water into a mess. The swell is a mix of short-period, weak windswell, and the combined energy is barely registering (100 to 827). It’s just not worth paddling out for. There’s a bit of a break in the wind on the morning of the 29th, but with onshore winds and a small, short-period swell, it’s still a no-go.
We scrape through to the 31st with a bit more size, but still cross-onshore and lumpy. It’s a skip.
Now, things get a bit interesting for the first couple of days of September. On Tuesday the 1st, we’ve got a pulse of swell coming in from the ESE, around 8ft to 10ft, with a period of 12 to 13 seconds. That’s some decent groundswell. The winds are from the NNW, which is cross-off at Yonabaru, meaning the face will be clean. The combined energy jumps up to 2128 and 3391 – that’s a solid push. But here’s the catch: the model is calling it “marginal” and giving it a low score. The size is getting up there, and for a beginner spot like this, 8ft to 10ft is getting into expert territory.
Then, on Wednesday the 2nd of September, we see a monster. The morning shows a massive 18ft swell from the NW with a period of 10 seconds, and a combined energy reading of 8589. That’s a huge amount of water moving. The wind is cross-off from the WNW, so it’ll be clean. But the model is very clear: the swell is too big for this break. It’s a no-go for anyone. It’s a kite surfer’s dream, not a paddle surfer’s. The afternoon drops back to 10ft from the NNE, which is still a lot of power.
After that, the rollercoaster drops off a cliff. From the 3rd of September onwards, we’re back to small, weak, and wind-affected surf. The wind goes cross and onshore again, and the swell disappears. The combined energy numbers drop back into the double digits and low hundreds. The final week of the outlook is a write-off with gale-force winds predicted for the 8th and 9th of September.
So, the only real glimmer in this whole outlook is the morning of the 1st of September. If you’re an experienced surfer who can handle a solid 8ft to 10ft groundswell, and you can get out in the cross-off winds, that’s your window. It’s the best of a bad bunch, but it’s not a beginner’s day. The 18ft swell on the 2nd is just a spectacle for the beach. Don’t be a hero.
Stay safe, keep an eye on the sky, and I’ll catch you next time.
Rusty
Short Range ForecastModerate rain (total 15mm), heaviest on Tue night. Warm (max 30°C on Thu morning, min 27°C on Tue night). Winds decreasing (near gales from the WNW on Tue night, moderate winds from the S by Thu morning). | Days 5-7 Weather SummaryLight rain (total 5mm), mostly falling on Mon morning. Warm (max 29°C on Sat morning, min 27°C on Fri night). Mainly fresh winds. | ||||||||||||||||||
Wednesday 26 | Thursday 27 | Friday 28 | Saturday 29 | Sunday 30 | Monday 31 | ||||||||||||||
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) | NW 8 | NNW 9 | ESE 9 | E 13 | E 13 | E 13 | SE 5 | SE 6 | SE 6 | SE 7 | SE 7 | ESE 6 | ESE 6 | ESE 7 | ESE 8 | ESE 10 | ESE 10 | ESE 10 | ESE 11 |
Wave Graph | |||||||||||||||||||
1075 | 674 | 65 | 55 | 53 | 51 | 119 | 196 | 231 | 226 | 158 | 113 | 85 | 93 | 157 | 502 | 590 | 720 | 1081 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | cross-off | cross-off | cross-off | cross | cross | cross-on | cross-on | cross-on | cross-on | on | on | on | cross-on | cross-on | cross-on | cross-on | cross-on | cross |
High Tide | 5:17AM2.04m | 6:38PM2.01m | 6:03AM2.14m | 7:05PM2.07m | 6:44AM2.21m | 7:32PM2.12m | 7:23AM2.23m | 7:57PM2.14m | 8:01AM2.21m | 8:23PM2.15m | 8:39AM2.14m | 8:50PM2.13m | |||||||
Low Tide | 11:37PM1.12m | 12:03PM0.34m | 00:15AM0.96m | 12:39PM0.31m | 00:49AM0.82m | 1:12PM0.32m | 1:22AM0.69m | 1:44PM0.38m | 1:56AM0.60m | 2:14PM0.48m | 2:31AM0.54m | 2:44PM0.61m | |||||||
— | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | |
6:55 | — | 6:54 | — | — | 6:53 | — | — | 6:52 | — | — | 6:52 | — | — | 6:51 | — | — | 6:50 | — | |
mm | 8 | 4 | 1 | — | — | — | 1 | — | 1 | — | — | — | — | — | — | — | 3 | 2 | 3 |
Temp °C | 28 | 28 | 28 | 28 | 30 | 29 | 28 | 29 | 29 | 28 | 29 | 29 | 27 | 29 | 29 | 27 | 28 | 29 | 28 |
Feels °C | 24 | 26 | 28 | 29 | 32 | 31 | 31 | 31 | 31 | 30 | 31 | 31 | 29 | 29 | 29 | 27 | 29 | 30 | 28 |
Swell 1 Height (m) Direction Period (s) | N 9 | NNW 9 | WNW 9 | WNW 9 | E 7 | W 10 | W 11 | W 10 | SW 9 | SSW 10 | SSW 9 | SSW 9 | S 9 | SSW 9 | ESE 8 | SSW 9 | ESE 10 | ESE 10 | ESE 11 |
417 | 674 | 688 | 533 | 39 | 700 | 585 | 264 | 118 | 161 | 236 | 180 | 106 | 147 | 157 | 108 | 590 | 720 | 1081 | |
Swell 2 Height (m) Direction Period (s) | NE 11 | ESE 10 | ESE 9 | E 8 | E 13 | E 7 | SW 9 | SSW 9 | W 10 | W 10 | E 13 | S 8 | SW 8 | E 12 | SSW 9 | E 12 | S 8 | SW 10 | SSW 10 |
453 | 136 | 65 | 48 | 53 | 25 | 78 | 138 | 133 | 48 | 55 | 21 | 84 | 44 | 119 | 24 | 36 | 45 | 33 | |
Swell 3 Height (m) Direction Period (s) | ESE 12 | E 15 | E 14 | E 13 | SE 9 | E 13 | E 12 | E 12 | E 12 | E 13 | W 8 | E 13 | E 12 | SW 9 | E 12 | SW 9 | SW 10 | SSW 9 | SW 10 |
579 | 17 | 35 | 55 | 29 | 51 | 25 | 25 | 25 | 55 | 13 | 53 | 47 | 37 | 44 | 46 | 35 | 26 | 36 | |
Wind waves Height (m) Direction Period (s) | NW 8 | WSW 8 | SW 7 | SSW 6 | WSW 9 | S 8 | SE 5 | SE 6 | SE 6 | SE 7 | SE 7 | ESE 6 | ESE 6 | ESE 7 | — | ESE 10 | NE 4 | NNE 5 | NNE 6 |
1075 | 1014 | 437 | 171 | 838 | 324 | 119 | 196 | 231 | 226 | 158 | 113 | 85 | 93 | — | 502 | 16 | 59 | 119 | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 607 | 607 | 599 | 607 | 599 | 76 | 10 | 599 | 13 | 10 | 13 | 13 | 16 | 16 | 16 | 616 | 670 | 670 | 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.











