Surf Forecasts:
Yonabaru surf forecast from 23 Aug 2026:
- Best quality surf: Tuesday 25 Aug, 3AM (local time) - 11ft (3.5m), 18s period, ESE swell with cross-shore winds.
- Most powerful swell: Tuesday 25 Aug, 12PM (local time) - 15ft (4.5m), 16s period, E swell with 10,089 kJ wave energy.
- Next surfable swell (1★+): Tuesday 25 Aug, 3AM (local time) - 11ft (3.5m), 18s 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 3AM. The primary swell is predicted to be 3.5m and 18s period with a secondary swell of 0.8m and 10s. 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 5.0m 9s period and expected on Wednesday (Aug 26) at 3AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3AM (Tue 25th Aug) | 11ft (3.5m) 18s |
| Best Surf | 3AM (Tue 25th Aug) | 11ft (3.5m) 18s |
| 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, Rusty here. Let's get into it.
First up, it’s a pretty bleak start for the next week or so, with a whole lot of nothing on offer. There's a real gap from now, through the 23rd and into the start of September, where conditions are just poor. Most mornings and afternoons are showing choppy, onshore wind and small, grovelly waves. It’s not looking good at all.
The real standout and the only time it’s worth even looking at the ocean is hitting us on Tuesday the 25th. The morning session at Yonabaru is the one. We’ve got a massive 13 ft swell pumping in from the ESE with a long period of 17 seconds, so there’s serious groundswell energy (combined energy is a whopping 10086). Now, that’s a lot of water, and the records show this break is a beginner spot, so this is strictly for the experienced crew. It’s going to be too big for anyone green. The wind is light cross-shore from the north at 16 mph, which is decent, but with that size and power, it'll be challenging. The water temp is 84°, which is pretty much bang average for the time of year, no surprises there.
After that, the swell drops, but the wind turns nasty. By Wednesday the 26th, we’ve got a near gale blowing offshore from the WSW at 37 mph, but honestly, getting out in that is a mission and it’s going to be messy. The rest of the first week and into the second week is just a write-off of strong onshore winds and building, messy swell, particularly from the 31st of August through the 3rd of September, when it gets serious. We’re looking at 10 ft to 12 ft swell with near gale to severe gale cross-onshore winds. That’s blown out and dangerous. At that point, with that much wind and a beach setup, it looks more interesting for kite surfing than paddling.
Marginal conditions finally show up on the 4th of September, with a cleaner NW wind, but the swell is lower and the quality is still questionable. For the 5th, we get a bit of cross-offshore wind and 5-6 ft swell from the NNE with a moderate period of 12 seconds, but the overall energy is moderate (905-908). It’s still a long way out, so it’s promising but less certain. The windows of clean, surfable waves are very thin, and most of the forecast is a bust. The blank run has been normal for this spot with the typhoon season kicking in.
Stay safe, and don't force it.
Rusty.
Short Range ForecastLight rain (total 5mm), mostly falling on Tue night. Warm (max 29°C on Mon afternoon, min 27°C on Sun night). Winds increasing (light winds from the ESE on Sun night, gales from the W by Tue night). | Days 4-6 Weather SummaryModerate rain (total 18mm), heaviest on Wed afternoon. Warm (max 30°C on Fri afternoon, min 27°C on Wed afternoon). Winds decreasing (near gales from the WSW on Wed morning, light winds from the SE by Fri afternoon). | ||||||||||||||||||||
Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | Friday 28 | Saturday 29 | |||||||||||||||
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) | SSE 5 | SE 8 | SE 12 | SE 16 | ESE 17 | ESE 18 | ESE 17 | ESE 16 | E 14 | NW 11 | ESE 10 | ESE 9 | ENE 13 | ESE 8 | ESE 8 | ESE 8 | E 8 | E 10 | E 9 | ESE 7 | ESE 8 |
Wave Graph  | |||||||||||||||||||||
 kJ | 19 | 125 | 37 | 251 | 1107 | 4185 | 10033 | 9240 | 3809 | 1234 | 120 | 99 | 56 | 101 | 120 | 77 | 41 | 51 | 122 | 91 | 204 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | on | on | on | cross-on | cross | cross | cross-off | off | cross-off | cross | cross | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | on |
High Tide | 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 | 7:23AM2.23m | 7:57PM2.14m | ||||||||
Low Tide | 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 | 1:44PM0.38m | 1:56AM0.60m | |||||||
 | |  |  | | |  | |  | | | | | |  | | | | | | | |
 | 6:03 | — | — | 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 | — | — | — | 1 | — | — | — | — | 4 | 2 | 4 | 6 | 3 | 1 | 1 | — | 1 | — | — | 2 | 1 |
Temp °C | 28 | 28 | 27 | 28 | 29 | 27 | 29 | 29 | 28 | 28 | 28 | 28 | 29 | 29 | 28 | 29 | 30 | 28 | 29 | 28 | 28 |
Feels °C | 30 | 30 | 29 | 30 | 31 | 29 | 29 | 29 | 24 | 23 | 27 | 27 | 28 | 30 | 29 | 32 | 33 | 32 | 31 | 30 | 30 |
Swell 1 Height (m) Direction Period (s) | SW 10 | SSW 10 | SW 9 | SE 16 | ESE 17 | ESE 18 | ESE 17 | ESE 16 | E 14 | NW 11 | W 10 | WSW 10 | E 13 | SSW 12 | SSW 12 | SSW 11 | SSW 11 | SSW 11 | SSW 11 | S 10 | SSW 11 |
| kJ | 400 | 437 | 162 | 251 | 1107 | 4185 | 10033 | 9240 | 3809 | 1234 | 1943 | 867 | 30 | 3769 | 2757 | 1587 | 1725 | 1456 | 938 | 333 | 382 |
Swell 2 Height (m) Direction Period (s) | E 9 | ESE 10 | S 7 | SW 8 | SW 9 | SW 9 | SSW 9 | SW 9 | NE 10 | NNE 11 | ESE 10 | ESE 9 | ENE 13 | E 18 | E 16 | E 10 | E 8 | E 10 | E 13 | SW 11 | S 10 |
| kJ | 14 | 30 | 16 | 82 | 123 | 79 | 53 | 36 | 396 | 270 | 120 | 99 | 56 | 6 | 5 | 52 | 41 | 49 | 31 | 382 | 149 |
Swell 3 Height (m) Direction Period (s) | SE 10 | ESE 13 | SE 12 | SW 10 | ENE 11 | ENE 10 | — | — | SW 9 | E 11 | E 14 | E 13 | E 18 | E 18 | ENE 16 | ESE 10 | E 10 | E 14 | ENE 13 | E 9 | E 12 |
| kJ | 15 | 18 | 37 | 35 | 22 | 19 | — | — | 37 | 205 | 35 | 32 | 6 | 6 | 25 | 9 | 32 | 14 | 60 | 42 | 27 |
Wind waves Height (m) Direction Period (s) | SSE 5 | SE 8 | E 4 | E 4 | E 6 | E 7 | NNE 5 | NNE 6 | NNW 8 | WSW 9 | SSW 8 | SSW 9 | SSW 12 | ESE 8 | ESE 8 | ESE 8 | — | E 7 | E 9 | ESE 7 | ESE 8 |
| kJ | 19 | 125 | 19 | 19 | 66 | 97 | 53 | 275 | 2045 | 3638 | 1516 | 1245 | 4182 | 101 | 120 | 77 | — | 51 | 122 | 91 | 204 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 13 | 13 | 13 | 13 | 13 | 14 | 13 | 727 | 607 | 607 | 727 | 727 | 760 | 727 | 51 | 10 | 10 | 10 | 10 | 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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