Surf Forecasts:
Yonabaru surf forecast from 23 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), 16s period, E swell with 9,523 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 16s 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 4.0m 9s period and expected on Wednesday (Aug 26) at 3PM.
| 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) 16s |
Table - best surf conditions forecast for Yonabaru over the next 16 days.
The Lowdown
Alright, let’s break this down. The next couple of weeks have some serious potential, but we got a bit of a gauntlet to run through first.
The first real window of interest kicks off on Tuesday the 25th. We’re looking at a solid pulse of swell, around 13ft, coming out of the ESE. The energy behind it is strong. The wind is the catch here – it’s cross-shore in the morning from the N, but swings cross-offshore from the NNW in the afternoon, cleaning things up. The problem is, this swell is just too big for our setup. It’s going to be unruly and likely closing out, so save your energy.
The next few days after that, Wednesday through to the end of the month, are pretty forgettable. We’ve got storms, onshore winds, and a mixture of short-period, weak swell. There’s a brief bump on the 28th and 29th, with waves around 5ft, but the period drops to a junky 7 seconds, and the cross-onshore wind is going to chop it up. Not worth the paddle.
We do see another jump on the 31st with the swell pushing 8ft to 10ft, but again, it’s onshore and sloppy. Into September 1st, things get properly out of hand – the models are showing a huge 20ft swell with mega energy. That is a serious amount of water, but it’s far too much for this break. It’s a washing machine, and unless you’re an absolute gun with a death wish, you’re staying on the beach.
After that, the ocean takes a breather. We’ve got a few days of tiny, weak surf until things start to re-align for the following weekend.
Now, for the standout. Keep your eyes on Saturday the 5th of September. That’s when the magic starts to happen. The wind goes light offshore from the WNW, and we get a clean 3ft to 4ft of SE swell with a long 15-16 second period. There’s real energy in it, too. The water will be glassy, the lines will have some push, and it’s going to be clean. That’s the one to circle.
And if that gets your blood pumping, Sunday the 6th is even bigger, but it comes with a warning. The morning session is the one. We’re talking 10ft of clean SE groundswell, glassy conditions, and incredible energy. For experienced surfers, this could be the pick of the whole forecast – a proper, grinding day. But the afternoon is a different story. The swell jumps to a massive 15ft, and it’s just going to be too much, turning the break into a closeout mess.
Beyond that, the surf fades away again, with small, weak waves through the 7th and 8th.
So, to sum it up: don’t get too excited about the first week. There are a couple of windows where it’s big, but the quality isn’t there for a paddle. The real standouts are the clean, long-period swells on the 5th and the morning of the 6th. The 6th is the serious one, but it’s only for experts. The 5th is the one for everyone else.
This Yonabaru stretch is a fairly consistent spot, but it doesn't like it too big. The water temp is running about average for this time of year, so nothing weird there. We just have to be patient and pick our moments.
Rusty.
Short Range ForecastHeavy rain (total 25mm), heaviest during Tue afternoon. Warm (max 30°C on Tue afternoon, min 27°C on Sun night). Winds increasing (light winds from the ESE on Sun night, gales from the WNW by Tue night). | Days 5-7 Weather SummaryHeavy rain (total 22mm), heaviest during Wed night. Warm (max 29°C on Thu morning, min 27°C on Wed night). Mainly fresh winds. | ||||||||||||||||||
Monday 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | Friday 28 | Saturday 29 | ||||||||||||||
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 12 | SE 16 | ESE 17 | ESE 17 | ESE 17 | ESE 16 | E 14 | N 10 | ENE 14 | ESE 8 | E 13 | E 13 | E 12 | ESE 7 | ESE 7 | SE 9 | SE 7 | ESE 7 | SE 7 |
Wave Graph | |||||||||||||||||||
37 | 251 | 1107 | 3416 | 9212 | 8124 | 2676 | 980 | 64 | 40 | 53 | 29 | 26 | 310 | 222 | 465 | 261 | 186 | 233 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | on | on | cross-on | cross | cross-off | cross-off | cross-off | cross-off | cross | cross | cross | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on |
High Tide | 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 | 7:23AM2.23m | 7:57PM2.14m | |||||||
Low Tide | 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 | 1:44PM0.38m | 1:56AM0.60m | ||||||
— | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — | 6:07 | — | — | |
6:58 | — | 6:57 | — | — | 6:55 | — | — | 6:54 | — | — | 6:53 | — | — | 6:52 | — | — | 6:52 | — | |
mm | 2 | 2 | — | — | — | 4 | 7 | 4 | 6 | 5 | 3 | 3 | — | 2 | 2 | 3 | 2 | 2 | — |
Temp °C | 28 | 28 | 29 | 27 | 29 | 30 | 28 | 28 | 28 | 27 | 29 | 29 | 28 | 29 | 29 | 28 | 28 | 28 | 28 |
Feels °C | 31 | 31 | 31 | 31 | 30 | 29 | 22 | 25 | 27 | 26 | 29 | 30 | 29 | 32 | 31 | 31 | 30 | 29 | 29 |
Swell 1 Height (m) Direction Period (s) | SW 9 | SE 16 | ESE 17 | ESE 17 | ESE 17 | ESE 16 | E 14 | N 10 | ESE 10 | WNW 10 | WSW 10 | WSW 11 | E 12 | SW 11 | SW 10 | SSW 10 | SW 10 | SSW 10 | SSW 10 |
162 | 251 | 1107 | 3416 | 9212 | 8124 | 2676 | 980 | 59 | 732 | 988 | 1599 | 26 | 1087 | 720 | 578 | 433 | 410 | 235 | |
Swell 2 Height (m) Direction Period (s) | S 7 | SW 9 | SW 9 | SW 9 | SW 9 | SW 9 | SW 9 | E 11 | E 14 | ESE 8 | ESE 8 | E 13 | E 16 | E 12 | ESE 7 | E 14 | S 8 | E 13 | E 12 |
16 | 91 | 97 | 64 | 39 | 38 | 37 | 154 | 16 | 40 | 19 | 29 | 5 | 26 | 168 | 14 | 92 | 53 | 47 | |
Swell 3 Height (m) Direction Period (s) | SE 12 | SW 10 | ENE 11 | SW 9 | — | — | — | E 11 | ENE 14 | E 13 | E 13 | E 18 | ENE 16 | ENE 12 | E 15 | — | E 13 | E 13 | ENE 12 |
37 | 36 | 66 | 64 | — | — | — | 85 | 64 | 31 | 53 | 6 | 25 | 28 | 38 | — | 31 | 123 | 86 | |
Wind waves Height (m) Direction Period (s) | E 4 | E 5 | E 6 | — | NNE 5 | N 6 | NNW 8 | W 8 | W 9 | SSW 8 | SSW 9 | S 9 | SSW 12 | ESE 7 | ESE 7 | SE 9 | SE 7 | ESE 7 | SE 7 |
19 | 20 | 65 | — | 35 | 187 | 1483 | 1762 | 2456 | 712 | 1351 | 1037 | 2561 | 310 | 222 | 465 | 261 | 186 | 233 | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 13 | 13 | 13 | 13 | 670 | 727 | 599 | 607 | 607 | 618 | 619 | 727 | 727 | 760 | 1013 | 616 | 13 | 1013 | 13 |
Best forecast wave conditions in Okinawa | |||||||||||||||||||
Best forecast wave conditions in Japan | |||||||||||||||||||
Header Global | |||||||||||||||||||
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)
Wind Speed (km/h)
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.











