Surf Forecasts:
Yonabaru surf forecast from 25 Aug 2026:
- Best quality surf: Tuesday 25 Aug, 12PM (local time) - 15ft (4.5m), 16s period, E swell with cross-offshore winds.
- Most powerful swell: Tuesday 25 Aug, 12PM (local time) - 15ft (4.5m), 16s period, E swell with 11,004 kJ wave energy.
- Next surfable swell (1★+): Tuesday 25 Aug, 12PM (local time) - 15ft (4.5m), 16s 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 Tuesday (Aug 25) at 12PM. The primary swell is predicted to be 4.5m and 16s 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 4.5m 16s and forecast to arrive on Tuesday (Aug 25) at 12PM. 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 Saturday (Aug 29) at 12AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12PM (Tue 25th Aug) | 15ft (4.5m) 16s |
| Best Surf | 12PM (Tue 25th Aug) | 15ft (4.5m) 16s |
| Most Powerful | 12PM (Tue 25th Aug) | 15ft (4.5m) 16s |
Table - best surf conditions forecast for Yonabaru over the next 16 days.
The Lowdown
Right, let’s have a look at this one, Yonabaru. It’s a bit of a beast this stretch, to be honest. The setup is a beginner-friendly break that’s fairly exposed, and it likes a NE swell direction. The water temp is sitting right on 84°F, which is pretty much normal for this time of year – nothing out of the ordinary there.
Now, straight up: the surf’s tricky over the next 16 days. We’ve got a huge block of ‘poor surf conditions’ running for most of it, so don’t get too excited too fast. But there are a couple of very intense windows that will demand respect, though only from the right crew.
Looking at the first real shot: Tuesday, 25th August. The swell comes out of the gate swinging. We’re talking a 15 ft swell from the ESE with a very long period of 17 seconds – that’s a proper groundswell. The combined wave energy is absolutely monstrous at 11175, which is some serious power. The wind’s a cross-shore from the north at 16 mph morning, then cleaning up to a cross-offshore NNW breeze in the afternoon at 22 mph. But here’s the big catch: this is simply too much size for Yonabaru. The numbers say it’s going to be blown out and way over the head, maybe even dangerous. The tide and wind are favourable, but only if you’re an absolute expert. For anyone else, give it a miss. The afternoon looks a touch cleaner, but at 15 ft and that massive energy, it’s still a big, heavy ocean. The long period (16-17 seconds) means these waves will have a lot of grunt, they’ll be better shaped, with longer lulls between sets – but for a beach break like Yonabaru, a period that long can make it break straight and close out. Basically, this day is a standout for power, but not for a fun, mellow surf.
Then things go quiet for a long stretch. Wednesday the 26th through to Monday the 7th of September is pretty much a write-off – mostly poor conditions, tiny waves, or a mess. It’s a solid 10+ day gap with nothing worth paddling for.
The second interesting blip hits hard on Wednesday, 2nd September. This is another huge swell event. Morning brings an 18 ft ESE swell at 12 seconds with cross-offshore wind from the WNW at near-gale force (37 mph!). That wind will carve the faces, but it also means the energy is through the roof at 9285. By the afternoon, it gets even bigger – 21 ft SE swell, with the same long period of 12 seconds, and the wind goes full offshore from the WNW at 31 mph. The combined energy is 12451 – an absolute beast. The conditions are clean and the tide is supposed to be okay, but honestly, 21 ft at a beginner spot is a no-go for 99% of surfers. This is expert-only territory, and even then, paddling out in a near-gale offshore wind will be a mission. That’s the raw power you’d expect, but the risk is off the charts.
After that, Thursday the 3rd and Friday the 4th of September fade into tiny, clean but almost flat conditions, with a little 2 ft to 2 ft swell from the east. The wind goes offshore and light, which would be beautiful, but there’s just no water moving. The 4th afternoon is almost surfable – just “ordinary” – with that gentle 9 mph offshore breeze and a tiny 2 ft wave. It’s the cleanest the whole window gets, but the size is pathetic.
The last few days (6th through 9th September) are mostly poor, with small onshore junk from the east. Nothing to write home about.
To be honest, the only standout here is Tuesday, 25th August for the raw, heavy power, and Wednesday, 2nd September for the extreme, expert-level swell. But neither is a good bet for a relaxing session at Yonabaru. It’s too big and too gnarly for this break. The rest is a long, flat, and messy desert. If you’re a beginner or even intermediate, you’re better off doing something else for the next two weeks.
Stay safe out there.
Rusty
Short Range ForecastHeavy rain (total 30mm), heaviest during Tue night. Warm (max 29°C on Tue morning, min 27°C on Tue night). Winds decreasing (near gales from the W on Tue night, moderate winds from the SSE by Thu afternoon). | Days 4-6 Weather SummarySome drizzle, heaviest during Fri morning. Warm (max 29°C on Fri morning, min 27°C on Fri night). Mainly fresh winds. | ||||||||||||||||||||
Tuesday 25 | Wednesday 26 | Thursday 27 | Friday 28 | Saturday 29 | Sunday 30 | Monday 31 | |||||||||||||||
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 17 | E 16 | NW 8 | NNW 10 | NW 10 | E 13 | E 13 | E 13 | SE 6 | SE 7 | SE 7 | ENE 13 | SE 8 | SE 7 | E 12 | E 12 | ESE 6 | ESE 6 | ESE 7 | ESE 10 | ESE 12 |
Wave Graph | |||||||||||||||||||||
11175 | 10024 | 860 | 833 | 476 | 55 | 53 | 51 | 203 | 412 | 479 | 35 | 359 | 271 | 47 | 44 | 44 | 40 | 60 | 258 | 995 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-off | off | cross-off | cross-off | cross-off | cross-off | cross | cross-on | cross-on | on | cross-on | on | on | on | on | cross-on | cross-on | cross-on | cross-on | cross-on |
High Tide | 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 | 8:01AM2.21m | 8:23PM2.15m | 8:39AM2.14m | 8:50PM2.13m | ||||||||
Low Tide | 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 | 2:14PM0.48m | 2:31AM0.54m | 2:44PM0.61m | ||||||||
6:05 | — | — | 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 | — | 5 | 16 | 4 | 3 | — | — | 2 | — | 1 | — | — | — | — | — | — | — | — | — | 1 | — |
Temp °C | 29 | 28 | 28 | 28 | 29 | 28 | 29 | 29 | 28 | 29 | 29 | 28 | 29 | 29 | 28 | 29 | 29 | 27 | 29 | 29 | 28 |
Feels °C | 31 | 27 | 25 | 26 | 30 | 29 | 30 | 31 | 30 | 30 | 29 | 30 | 30 | 30 | 30 | 30 | 30 | 28 | 29 | 29 | 28 |
Swell 1 Height (m) Direction Period (s) | ESE 17 | E 16 | ESE 12 | NNW 10 | NW 10 | WNW 10 | W 10 | W 11 | W 11 | W 11 | SSW 9 | WSW 10 | SSW 10 | SSW 9 | E 12 | SSW 9 | S 9 | SSW 8 | ESE 7 | ESE 10 | ESE 12 |
11175 | 10024 | 589 | 833 | 476 | 1019 | 635 | 841 | 708 | 286 | 176 | 32 | 363 | 272 | 47 | 213 | 99 | 92 | 60 | 258 | 995 | |
Swell 2 Height (m) Direction Period (s) | SW 9 | SW 9 | ENE 12 | ESE 10 | ESE 9 | ESE 8 | ESE 7 | E 13 | SSW 9 | SW 9 | WSW 10 | E 14 | E 13 | E 13 | SE 11 | ESE 6 | SW 9 | SW 10 | S 9 | S 8 | SW 10 |
39 | 27 | 589 | 108 | 66 | 38 | 18 | 51 | 141 | 186 | 141 | 14 | 55 | 53 | 5 | 25 | 71 | 33 | 78 | 44 | 48 | |
Swell 3 Height (m) Direction Period (s) | — | — | NE 10 | E 15 | E 14 | E 13 | E 13 | E 18 | E 12 | E 12 | E 15 | ENE 13 | W 9 | W 8 | SE 9 | E 12 | E 12 | E 11 | SW 10 | SW 10 | S 8 |
— | — | 157 | 17 | 35 | 55 | 53 | 6 | 26 | 25 | 38 | 35 | 14 | 5 | 3 | 44 | 44 | 40 | 48 | 44 | 18 | |
Wind waves Height (m) Direction Period (s) | — | N 6 | NW 8 | WSW 7 | SW 7 | SSW 7 | SSW 8 | S 8 | SE 6 | SE 7 | SE 7 | SSE 8 | SE 8 | SE 7 | S 9 | — | ESE 6 | ESE 6 | — | — | — |
— | 205 | 860 | 728 | 589 | 587 | 672 | 476 | 203 | 412 | 479 | 1188 | 359 | 271 | 473 | — | 43 | 40 | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 618 | 607 | 607 | 607 | 607 | 599 | 607 | 599 | 616 | 599 | 820 | 27 | 13 | 13 | 13 | 16 | 16 | 16 | 756 | 792 | 607 |
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.











