Surf Forecasts:
Yonabaru surf forecast from 27 Aug 2026:
- Best quality surf: Monday 31 Aug, 6PM (local time) - 11ft (3.5m), 9s period, E swell with offshore winds.
- Most powerful swell: Monday 31 Aug, 9PM (local time) - 11ft (3.5m), 9s period, E swell with 1,827 kJ wave energy.
- Next surfable swell (1★+): Monday 31 Aug, 3PM (local time) - 10ft (3.0m), 9s 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 Monday (Aug 31) at 3PM. The primary swell is predicted to be 3.0m and 9s period. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Yonabaru in the next 16 days are 3.5m 9s and forecast to arrive on Monday (Aug 31) at 9PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.5m 10s period and expected on Wednesday (Sep 02) at 12AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3PM (Mon 31st Aug) | 10ft (3.0m) 9s |
| Best Surf | 6PM (Mon 31st Aug) | 11ft (3.5m) 9s |
| Most Powerful | 9PM (Mon 31st Aug) | 11ft (3.5m) 9s |
Table - best surf conditions forecast for Yonabaru over the next 16 days.
The Lowdown
Alright folks, it's Rusty here. Let’s talk about what’s on offer for the next stretch, and I gotta be straight with you – it’s a tough one. The first week is pretty much a write-off for any decent surf, with a lot of messy, choppy conditions on the cards.
The first real glimmer of hope doesn’t show up until Monday, the 31st of August. Up until then, we’re looking at a solid week of onshore junk, with the odd pulse of swell but poor conditions from a SE wind that just won’t quit. You’re gonna want to sit on your hands until that Monday.
Now, Monday the 31st of August is the standout. Yonabaru gets a proper pulse of energy – we're talking a 10ft swell from the East (combined wave energy sitting at a strong 1464). The real kicker here is the wind: it’s set to go glassy, as in absolutely glass. That’s a rare treat. The period is a short 9 seconds, so it won’t be the most lined-up, but with that size and those clean conditions, it’s going to be on for experienced surfers. This one is the window.
After that, things get a bit messy again. The first of September sees the swell drop a bit, and the wind swings cross-offshore, which cleans it up, but the energy and quality don't hold the same magic. For the rest of the run into the second week, it’s mostly small or poor quality. You’ll see some glassy mornings around the 10th of September, but the swell is tiny – 3ft with weak energy (99). It’s surfable, but you’ll be hunting for scraps.
Overall, you’re looking at a long wait for that one Monday session. Hang tight and keep an eye on the sky, because the rest of this 16-day window is mostly a dry spell for anything truly worthwhile.
Rusty.
Short Range ForecastSome drizzle, heaviest during Thu night. Warm (max 29°C on Fri morning, min 27°C on Sat night). Mainly fresh winds. | Days 5-7 Weather SummaryHeavy rain (total 38mm), heaviest during Sun night. Warm (max 29°C on Mon afternoon, min 27°C on Sun night). Mainly fresh winds. | ||||||||||||||||||
Friday 28 | Saturday 29 | Sunday 30 | Monday 31 | Tuesday 1 | Wednesday 2 | ||||||||||||||
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 7 | SE 6 | ESE 6 | ESE 6 | SE 7 | SE 7 | ESE 7 | ESE 8 | ESE 10 | E 10 | E 10 | E 9 | ESE 9 | ESE 8 | ESE 8 | ENE 10 | E 11 | E 10 | ESE 10 |
Wave Graph  | |||||||||||||||||||
 kJ | 156 | 151 | 128 | 265 | 331 | 247 | 153 | 238 | 778 | 1198 | 1375 | 1464 | 1317 | 1000 | 427 | 567 | 496 | 400 | 300 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-on | on | on | on | on | cross-on | cross-on | cross-on | cross-on | glassy | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross |
High Tide | 6:44AM2.21m | 7:32PM2.12m | 7:23AM2.23m | 7:57PM2.14m | 8:01AM2.21m | 8:23PM2.15m | 8:39AM2.14m | 8:50PM2.13m | 9:20AM2.02m | 9:18PM2.09m | 10:05AM1.87m | 9:49PM2.03m | |||||||
Low Tide | 00:49AM0.82m | 1:12PM0.32m | 1:22AM0.69m | 1:44PM0.38m | 1:56AM0.60m | 2:14PM0.48m | 2:31AM0.54m | 2:44PM0.61m | 3:07AM0.52m | 3:14PM0.77m | 3:47AM0.54m | 3:45PM0.94m | |||||||
 |  | |  | | |  |  | | |  | | | | | | | | | |
 | — | 6:05 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — |
 | 6:53 | — | 6:52 | — | — | 6:52 | — | — | 6:51 | — | — | 6:50 | — | — | 6:49 | — | — | 6:47 | — |
mm | 1 | — | — | — | — | — | — | — | — | 9 | 6 | 4 | 1 | 3 | 2 | 9 | 2 | 2 | 3 |
Temp °C | 28 | 29 | 29 | 28 | 29 | 29 | 28 | 29 | 28 | 27 | 28 | 29 | 28 | 28 | 28 | 27 | 28 | 28 | 26 |
Feels °C | 31 | 31 | 31 | 29 | 31 | 31 | 29 | 29 | 29 | 27 | 33 | 36 | 33 | 29 | 29 | 29 | 31 | 30 | 28 |
Swell 1 Height (m) Direction Period (s) | W 10 | W 10 | W 9 | SSW 9 | SSW 9 | SSW 9 | S 9 | SSW 8 | SSW 8 | SSW 8 | S 10 | SSW 10 | S 10 | S 10 | S 10 | ENE 10 | E 11 | E 10 | ESE 10 |
| kJ | 400 | 239 | 106 | 101 | 106 | 94 | 81 | 101 | 80 | 57 | 52 | 72 | 55 | 165 | 371 | 567 | 496 | 400 | 300 |
Swell 2 Height (m) Direction Period (s) | SW 9 | SW 9 | SW 9 | W 9 | W 8 | E 13 | SW 8 | SE 11 | ENE 12 | SW 9 | SW 10 | SW 9 | SW 10 | SW 10 | E 14 | E 14 | — | NNW 8 | W 11 |
| kJ | 91 | 112 | 88 | 60 | 19 | 53 | 55 | 43 | 78 | 13 | 15 | 14 | 16 | 15 | 4 | 15 | — | 6 | 9 |
Swell 3 Height (m) Direction Period (s) | E 12 | E 12 | S 7 | E 13 | E 13 | W 7 | E 12 | E 12 | ENE 12 | — | — | — | S 10 | SW 10 | E 14 | — | — | — | NNW 9 |
| kJ | 26 | 44 | 17 | 32 | 55 | 9 | 47 | 45 | 79 | — | — | — | 51 | 15 | 15 | — | — | — | 7 |
Wind waves Height (m) Direction Period (s) | SE 7 | SE 6 | ESE 6 | ESE 6 | SE 7 | SE 7 | ESE 7 | ESE 8 | ESE 10 | E 10 | E 10 | E 9 | ESE 9 | ESE 8 | ESE 8 | SSE 10 | S 10 | S 9 | SSW 10 |
| kJ | 156 | 151 | 128 | 265 | 331 | 247 | 153 | 238 | 778 | 1198 | 1375 | 1464 | 1317 | 1000 | 427 | 1339 | 1290 | 971 | 917 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 10 | 13 | 13 | 607 | 13 | 820 | 16 | 16 | 785 | 599 | 792 | 0 | 607 | 607 | 607 | 33 | 14 | 13 | 13 |
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.
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