Surf Forecasts:
Yonabaru surf forecast from 22 Aug 2026:
- Best quality surf: Tuesday 25 Aug, 6AM (local time) - 11ft (3.5m), 17s period, ESE swell with cross-shore winds.
- Most powerful swell: Tuesday 25 Aug, 12PM (local time) - 15ft (4.5m), 17s period, E swell with 11,226 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. 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 4.5m 17s and forecast to arrive on Tuesday (Aug 25) at 12PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 5.0m 11s period and expected on Thursday (Aug 27) at 3AM.
| 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 | 12PM (Tue 25th Aug) | 15ft (4.5m) 17s |
Table - best surf conditions forecast for Yonabaru over the next 16 days.
The Lowdown
Alright, Rusty here again, lookin’ at the same stretch of coast. It’s gonna be a quiet run for the most part, but there’s one day that’ll wake you up.
We’re talkin’ Yonabaru. Water temp is 84°F, right where it should be for this time of year, so no weirdness there.
The first few days are flat and messy. Starting Saturday, August 22nd, we got maybe 1ft of weak swell, combined energy is only 40 (real weak). Wind is a fresh cross-onshore, so it’s lumpy and choppy. Not worth wetting a board. That pattern holds all through the next week – tiny waves, 1-2 ft max, with mostly cross-onshore winds and combined energy staying under 200. Poor surf all the way.
Then Tuesday, August 25th rolls in and that’s the big one – but it’s got a nasty edge. We’re lookin’ at a solid 13ft swell from the ESE, with a 17-second period (that’s groundswell, very long period). Combined energy is a massive 8358 (strong). Wind Tuesday morning is moderate cross-shore, but by the afternoon it cleans up with a cross-offshore breeze. The water temp is still normal.
Here’s the catch: the forecast straight up says this swell is too big for this break. 13ft is monster territory – strictly for experts. For a beginner-friendly spot like Yonabaru, this is dangerous. The wave comment says wind and tide are favorable, so it would look clean, but at that size and with that long period, it’s gonna be heavy and straight at a beach break. Not a place to learn. Only true chargers should even think about it.
After that, Wednesday the 26th has strong offshore winds (gusting to 45 km/h) but the swell crashes down to 2ft by the afternoon. The wind is so strong it’s hard to even paddle out. Then it’s back to small, weak, crummy surf for days. Another pulse on Thursday, September 3rd, brings 8ft to 7ft swell (combined energy 2612 – moderate to strong) with a 15-second period, but the wind is cross-shore and it’s rated marginal. Might give a few rides for the experienced, but it’s got a cross-chop.
The rest of the run into September 6th is small, weak, and choppy. Long stretch of nothing.
The only real standout is Tuesday, August 25th – but only if you’re a heavy hitter. For the rest of us, just let this one slide.
Rusty.
Short Range ForecastLight rain (total 7mm), mostly falling on Sat afternoon. Warm (max 29°C on Sun afternoon, min 27°C on Sat night). Mainly fresh winds. | Days 4-6 Weather SummaryHeavy rain (total 30mm), heaviest during Tue night. Warm (max 30°C on Tue morning, min 27°C on Tue night). Winds increasing (moderate winds from the NNE on Tue morning, strong winds from the S by Wed night). | ||||||||||||||||||||
Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | Friday 28 | |||||||||||||||
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) | ESE 11 | ENE 9 | ESE 10 | ESE 10 | ESE 4 | SE 12 | ESE 16 | ESE 16 | ESE 18 | ESE 17 | E 16 | E 14 | N 12 | ESE 10 | E 9 | E 13 | E 11 | E 16 | ESE 8 | E 10 | E 8 |
Wave Graph  | |||||||||||||||||||||
 kJ | 24 | 16 | 30 | 36 | 26 | 37 | 322 | 1067 | 4531 | 8316 | 8980 | 2918 | 1301 | 77 | 60 | 85 | 59 | 25 | 58 | 48 | 161 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-on | cross-on | cross-on | on | on | on | cross-on | cross | cross-off | cross-off | off | off | cross-off | cross | cross | cross-on | cross-on | on | on |
High Tide | 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 | 6:44AM2.21m | 7:32PM2.12m | ||||||||
Low Tide | 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 | 1:12PM0.32m | 1:22AM0.69m | ||||||||
 |  |  | |  | | |  |  | | | | | | | | | | | | | |
 | 6:03 | — | — | 6:03 | — | — | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — |
 | — | 6:59 | — | — | 6:58 | — | — | 6:57 | — | — | 6:55 | — | — | 6:54 | — | — | 6:53 | — | — | 6:52 | — |
mm | — | 2 | 2 | — | 1 | 1 | 1 | — | — | — | — | 8 | 2 | 5 | 6 | 5 | 2 | 2 | — | — | — |
Temp °C | 28 | 28 | 27 | 28 | 29 | 27 | 28 | 29 | 27 | 30 | 29 | 28 | 28 | 28 | 27 | 28 | 28 | 28 | 29 | 29 | 28 |
Feels °C | 29 | 29 | 29 | 30 | 31 | 29 | 31 | 31 | 30 | 32 | 30 | 27 | 26 | 26 | 25 | 27 | 27 | 28 | 31 | 31 | 32 |
Swell 1 Height (m) Direction Period (s) | SW 9 | E 9 | SSW 10 | SSW 10 | SSW 10 | SSW 9 | SSW 9 | ESE 16 | ESE 18 | ESE 17 | E 16 | E 14 | N 12 | ESE 10 | W 12 | E 9 | E 11 | WSW 11 | SSW 11 | WSW 11 | SSW 10 |
| kJ | 491 | 6 | 439 | 578 | 386 | 266 | 207 | 1067 | 4531 | 8316 | 8980 | 2918 | 1301 | 77 | 2599 | 39 | 59 | 1835 | 1941 | 814 | 528 |
Swell 2 Height (m) Direction Period (s) | ENE 9 | ENE 9 | ESE 10 | ESE 10 | SE 10 | SE 12 | ESE 16 | SSW 9 | SSW 9 | SSW 9 | SSW 9 | SSW 9 | ESE 11 | E 14 | E 9 | E 13 | E 18 | E 16 | E 10 | E 10 | WSW 11 |
| kJ | 16 | 16 | 30 | 36 | 15 | 37 | 322 | 172 | 127 | 65 | 68 | 106 | 161 | 36 | 54 | 52 | 6 | 20 | 18 | 48 | 353 |
Swell 3 Height (m) Direction Period (s) | ESE 11 | ESE 11 | SE 10 | ESE 14 | E 9 | E 9 | SSE 9 | ENE 11 | — | — | ESE 20 | SE 10 | E 11 | ENE 14 | ENE 13 | E 13 | ENE 18 | ENE 16 | E 12 | E 15 | E 14 |
| kJ | 24 | 12 | 25 | 20 | 13 | 14 | 7 | 22 | — | — | 39 | 4 | 160 | 63 | 60 | 85 | 31 | 25 | 11 | 38 | 34 |
Wind waves Height (m) Direction Period (s) | S 9 | S 10 | SSE 6 | ESE 4 | ESE 4 | ESE 5 | E 5 | E 6 | E 7 | NNE 5 | N 6 | NNW 8 | W 8 | W 11 | SSW 9 | SW 11 | SW 12 | S 9 | ESE 8 | S 10 | E 8 |
| kJ | 1122 | 1218 | 71 | 14 | 26 | 31 | 35 | 64 | 113 | 42 | 123 | 607 | 926 | 3385 | 2007 | 6584 | 7164 | 1664 | 58 | 646 | 161 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 599 | 670 | 13 | 13 | 13 | 13 | 13 | 13 | 14 | 13 | 727 | 599 | 727 | 607 | 616 | 760 | 727 | 727 | 670 | 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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