Surf Forecasts:
Yonabaru surf forecast from 21 Aug 2026:
- Best quality surf: Tuesday 25 Aug, 6AM (local time) - 11ft (3.5m), 17s period, ESE swell with cross-onshore winds.
- Most powerful swell: Tuesday 25 Aug, 9AM (local time) - 11ft (3.5m), 17s period, ESE swell with 6,846 kJ wave energy.
- Next surfable swell (1★+): Tuesday 25 Aug, 6AM (local time) - 11ft (3.5m), 17s 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 Tuesday (Aug 25) at 6AM. The primary swell is predicted to be 3.5m and 17s period with a secondary swell of 0.4m and 10s. The wind is predicted to be cross-onshore as the swell arrives.
The most powerful waves expected at Yonabaru in the next 16 days are 3.5m 17s and forecast to arrive on Tuesday (Aug 25) at 9AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 3.5m 9s period and expected on Wednesday (Aug 26) at 9AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6AM (Tue 25th Aug) | 11ft (3.5m) 17s |
| Best Surf | 6AM (Tue 25th Aug) | 11ft (3.5m) 17s |
| Most Powerful | 9AM (Tue 25th Aug) | 11ft (3.5m) 17s |
Table - best surf conditions forecast for Yonabaru over the next 16 days.
The Lowdown
Alright, this is Rusty comin' at ya from the sand.
Look, I gotta be straight with you – the next week or so is a bit of a write-off for waves around here. The forecast is lookin’ pretty grim for a good stretch, with a lot of stormy, onshore slop. It's gonna be a tough wait for something decent.
The first real chance of a surf we get is actually a bit of a weird one. We're lookin' at Yonabaru. Now, I know it's a beginner-friendly spot, but the numbers are tellin' a story. Come Sunday, August 25th, there's a massive amount of energy in the water – we're talkin' a combined energy of 7441, and the swell is hittin' 12 ft from the East with a long 16-second period. That's a proper groundswell. The problem is, that's just way too much juice for this break. It's an expert-only situation, and even then, the wind's not your friend, blowing cross-onshore. It’s gonna be a raw, powerful mess. If you’re a kite surfer, this Sunday and Monday setup might look like your idea of a good time, but for paddle surfing, it’s a hard pass.
You need to wait for a shift. Keep your eyes on Wednesday, August 26th. The pattern finally flips for a window. The swell drops to a much more manageable 6 ft from the NE, still packing good energy (1083) from that long-period groundswell. The real magic is the wind: it goes clean offshore from the West. That breeze will groom the waves perfectly. For a spot like Yonabaru that is fairly consistent, this is a proper standout. The wave quality should be top-notch, and the offshore wind is a major positive. This is the one to aim for.
After that, it gets a little small again. Thursday the 27th and Friday the 28th we get clean offshore winds, but the swell drops off hard to knee-waist high stuff with weak energy (83). It's surfable for a log or a funshape, but nothing to get worked up about. There's another flicker of hope a bit further out on Monday, September 1st with a clean 4 ft to 4 ft ESE swell and cross-off winds, giving us some alright shape. But after that, the onshore winds and storms look set to return for the start of September.
So, to sum it up: the first week is a write-off. The real standout, the one you wait for, is that Wednesday the 26th window with clean offshore winds and a solid, rideable groundswell. It ain't perfect, but it’s the best on offer by a long shot.
Rusty.
Short Range ForecastHeavy rain (total 44mm), heaviest during Fri morning. Warm (max 28°C on Sat morning, min 26°C on Fri morning). Mainly fresh winds. | Days 4-6 Weather SummaryLight rain (total 5mm), mostly falling on Mon morning. Warm (max 29°C on Tue morning, min 27°C on Mon morning). Wind will be generally light. | ||||||||||||||||||||
Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | |||||||||||||||
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) | ENE 8 | ENE 8 | ENE 8 | ENE 9 | ENE 9 | SE 10 | ESE 5 | ESE 5 | E 5 | ESE 18 | ESE 17 | ESE 17 | ESE 17 | E 16 | E 14 | NNE 11 | E 10 | E 11 | E 13 | E 8 | ESE 8 |
Wave Graph  | |||||||||||||||||||||
 kJ | 21 | 24 | 6 | 8 | 15 | 26 | 57 | 70 | 54 | 395 | 1900 | 3967 | 6846 | 6041 | 1980 | 431 | 73 | 59 | 86 | 68 | 48 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | on | on | on | on | cross-on | cross-on | cross-off | off | off | off | off | off | off |
High Tide | 1:25PM1.53m | 00:10AM1.84m | 3:38PM1.57m | 1:38AM1.79m | 4:55PM1.69m | 3:12AM1.83m | 5:37PM1.81m | 4:23AM1.93m | 6:10PM1.92m | 5:17AM2.04m | 6:38PM2.01m | 6:03AM2.14m | 7:05PM2.07m | ||||||||
Low Tide | 5:55PM1.32m | 8:02AM0.73m | 7:49PM1.42m | 9:29AM0.65m | 9:46PM1.39m | 10:33AM0.53m | 10:52PM1.26m | 11:22AM0.42m | 11:37PM1.12m | 12:03PM0.34m | 00:15AM0.96m | 12:39PM0.31m | 00:49AM0.82m | ||||||||
 | |  | | | |  | |  | | | | | | | | | | | | | |
 | 6:03 | — | — | 6:03 | — | — | 6:03 | — | — | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — |
 | — | 7:00 | — | — | 6:59 | — | — | 6:58 | — | — | 6:57 | — | — | 6:55 | — | — | 6:54 | — | — | 6:53 | — |
mm | 29 | 3 | 4 | 2 | 3 | 2 | — | 1 | — | 1 | — | — | — | 2 | 2 | — | — | — | 2 | 2 | 4 |
Temp °C | 26 | 27 | 27 | 28 | 27 | 27 | 28 | 28 | 27 | 28 | 28 | 27 | 29 | 29 | 27 | 29 | 29 | 28 | 28 | 28 | 28 |
Feels °C | 27 | 28 | 27 | 27 | 26 | 29 | 29 | 29 | 28 | 29 | 29 | 29 | 32 | 33 | 31 | 32 | 31 | 32 | 29 | 28 | 27 |
Swell 1 Height (m) Direction Period (s) | ENE 8 | E 8 | ENE 8 | ENE 9 | ENE 9 | E 9 | SSW 9 | SSW 9 | SSW 9 | SSW 10 | ESE 17 | ESE 17 | ESE 17 | E 16 | E 14 | NNE 11 | E 10 | WNW 11 | ESE 9 | E 8 | ESE 8 |
| kJ | 21 | 5 | 6 | 8 | 15 | 6 | 544 | 391 | 348 | 383 | 1900 | 3967 | 6846 | 6041 | 1980 | 431 | 73 | 1782 | 58 | 68 | 48 |
Swell 2 Height (m) Direction Period (s) | SW 8 | ENE 8 | E 10 | E 10 | E 9 | ENE 9 | ESE 14 | ESE 13 | SE 12 | ESE 18 | SSW 9 | SSW 9 | SSW 9 | SSW 9 | NNE 8 | E 11 | E 14 | ESE 9 | E 13 | E 18 | E 12 |
| kJ | 18 | 24 | 2 | 2 | 2 | 26 | 20 | 35 | 37 | 395 | 227 | 154 | 88 | 70 | 389 | 157 | 35 | 45 | 30 | 6 | 26 |
Swell 3 Height (m) Direction Period (s) | ESE 10 | ESE 11 | E 14 | — | ENE 9 | SE 10 | ESE 14 | ESE 13 | SE 15 | ESE 13 | — | ENE 10 | — | — | SSW 9 | NNE 12 | ENE 14 | E 11 | E 13 | SE 10 | E 16 |
| kJ | 11 | 11 | 4 | — | 15 | 25 | 41 | 35 | 35 | 111 | — | 19 | — | — | 94 | 137 | 64 | 59 | 86 | 14 | 20 |
Wind waves Height (m) Direction Period (s) | S 7 | S 8 | S 8 | SSE 9 | S 9 | S 10 | ESE 5 | ESE 5 | E 5 | E 6 | E 6 | E 7 | NNE 5 | N 6 | NW 6 | WNW 9 | W 10 | SSW 7 | WSW 11 | WSW 11 | WSW 12 |
| kJ | 452 | 632 | 796 | 1437 | 1171 | 1131 | 57 | 70 | 54 | 68 | 109 | 89 | 51 | 156 | 338 | 1838 | 2409 | 515 | 3375 | 2894 | 2459 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 634 | 599 | 599 | 622 | 599 | 13 | 607 | 619 | 13 | 13 | 13 | 14 | 14 | 13 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
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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