
Surf Forecasts:
Yonabaru surf forecast from 5 Sep 2026:
- Best quality surf: Tuesday 8 Sep, 6AM (local time) - 3ft (0.9m), 9s period, N swell with cross-offshore winds.
- Most powerful swell: Saturday 12 Sep, 12AM (local time) - 8ft (2.4m), 10s period, SE swell with 1,226 kJ wave energy.
- Next surfable swell (1★+): Tuesday 8 Sep, 6AM (local time) - 3ft (0.9m), 9s period with N 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 (Sep 08) at 6AM. The primary swell is predicted to be 0.9m and 9s 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 2.4m 10s and forecast to arrive on Saturday (Sep 12) at 12AM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.5m 9s period and expected on Saturday (Sep 12) at 3PM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6AM (Tue 8th Sep) | 3ft (0.9m) 9s |
| Best Surf | 6AM (Tue 8th Sep) | 3ft (0.9m) 9s |
| Most Powerful | 12AM (Sat 12th Sep) | 8ft (2.4m) 10s |
Table - best surf conditions forecast for Yonabaru over the next 16 days.
The Lowdown
G’day, I’m Rusty. Let’s see what we’ve got lined up for Yonabaru over the next couple of weeks.
Honestly, it’s a rough start. The first solid chance of anything half-decent doesn’t roll in until the 17th of September, and even then it’s marginal. Up until that point, we’re sittin’ through a long, frustrating stretch of poor surf – around 11 days of mostly onshore junk, cross-chop, and onshore slop. The swell’s there, but the wind’s just killing it, and the quality’s been downgraded every session. You’re not missing much.
Now, the window opens up a bit from Thursday the 17th afternoon. The wind starts to swing offshore from the SW at Yonabaru, and we get a clean little pulse of 6 ft from the ESE at 10 seconds. The combined energy’s moderate at 591 – enough to get a few decent ones, but it’s still only a marginal call. The real bright spot, though, comes on Friday the 18th.
Friday morning the 18th is the standout. We’ve got near-calm wind, just a slight air, and clean 5 ft swell from the E with a 9-second period. The combined energy sits at 400 (moderate). The afternoon glass off is even better – 4 ft out of the E, 8 seconds, and glassy conditions. That’s the best surf we’ll see all forecast. The water temp’s about 84°, which is pretty normal for this time of year, so no surprises there.
As for the break itself, Yonabaru is a beginner-friendly, fairly consistent spot, fairly exposed to the NE swell direction. The guidance says the optimum swell direction is NE, and we’re getting E/ESE through the good window, so it’s a bit off, but at 4 ft to 5 ft, it’s still fun for a beginner through intermediate. Crowds are sometimes an issue, so keep an eye out.
By Saturday the 19th, the swell backs off to 4 ft and 3 ft, and the energy drops to 177 and 96 – weak. Glassy conditions again, but the waves are ordinary. After that, it’s back to tiny, onshore junk from the 20th onward.
So, bottom line: if you’ve got patience, aim for Friday the 18th. That’s the pick of the whole 16-day run. The rest is a write-off.
Rusty.
Short Range ForecastLight rain (total 8mm), mostly falling on Mon afternoon. Warm (max 29°C on Tue morning, min 26°C on Tue night). Mainly fresh winds. | Days 4-6 Weather SummaryModerate rain (total 12mm), heaviest on Fri night. Warm (max 29°C on Thu afternoon, min 26°C on Wed night). Winds increasing (light winds from the NNE on Wed night, fresh winds from the E by Fri night). | ||||||||||||||||||||
Sunday 6 | Monday 7 | Tuesday 8 | Wednesday 9 | Thursday 10 | Friday 11 | Saturday 12 | |||||||||||||||
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) | NE 7 | N 7 | N 8 | NNW 7 | NNW 7 | N 9 | N 9 | NNW 8 | NNW 8 | N 8 | N 8 | N 7 | NNW 7 | N 9 | N 9 | ESE 6 | ESE 9 | SE 10 | SE 10 | E 6 | E 6 |
Wave Graph | |||||||||||||||||||||
286 | 257 | 442 | 365 | 231 | 126 | 122 | 190 | 226 | 196 | 217 | 88 | 91 | 198 | 157 | 216 | 595 | 1226 | 830 | 112 | 120 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross | cross-off | cross-off | cross-off | cross | cross-off | cross | cross | cross | cross | cross | on | on | on | on | on | on | on | on | on |
High Tide | 4:15PM1.63m | 2:19AM1.75m | 5:04PM1.76m | 3:47AM1.83m | 5:37PM1.87m | 4:48AM1.96m | 6:06PM1.97m | 5:36AM2.07m | 6:32PM2.04m | 6:18AM2.16m | 6:58PM2.10m | 6:58AM2.21m | 7:23PM2.14m | ||||||||
Low Tide | 8:58PM1.41m | 9:52AM0.61m | 10:21PM1.28m | 10:47AM0.51m | 11:09PM1.12m | 11:31AM0.43m | 11:47PM0.94m | 12:08PM0.38m | 00:21AM0.77m | 12:42PM0.38m | 00:54AM0.63m | 1:14PM0.43m | 1:27AM0.51m | ||||||||
6:09 | — | — | 6:09 | — | — | 6:11 | — | — | 6:11 | — | — | 6:11 | — | — | 6:11 | — | — | 6:11 | — | — | |
— | 6:44 | — | — | 6:43 | — | — | 6:42 | — | — | 6:40 | — | — | 6:38 | — | — | 6:37 | — | — | 6:37 | — | |
mm | 2 | 1 | 1 | 1 | 3 | — | — | — | — | — | 2 | — | 2 | — | 2 | — | 2 | 4 | — | — | — |
Temp °C | 28 | 28 | 27 | 28 | 28 | 27 | 29 | 28 | 27 | 28 | 27 | 26 | 28 | 29 | 28 | 28 | 28 | 27 | 28 | 28 | 27 |
Feels °C | 30 | 29 | 27 | 29 | 31 | 30 | 31 | 29 | 28 | 29 | 28 | 29 | 31 | 31 | 30 | 28 | 28 | 27 | 28 | 28 | 28 |
Swell 1 Height (m) Direction Period (s) | SSW 8 | E 6 | E 9 | ESE 8 | S 8 | N 9 | N 9 | NNW 8 | ENE 7 | ENE 9 | S 7 | N 7 | NNW 7 | N 9 | N 9 | N 9 | N 9 | N 8 | N 8 | SSE 9 | SE 8 |
73 | 66 | 74 | 24 | 35 | 126 | 122 | 190 | 9 | 25 | 10 | 88 | 91 | 198 | 157 | 103 | 74 | 44 | 19 | 362 | 147 | |
Swell 2 Height (m) Direction Period (s) | WNW 7 | S 9 | S 9 | S 9 | E 8 | WNW 6 | WNW 6 | ENE 8 | S 8 | S 8 | E 9 | WNW 6 | ESE 9 | E 9 | S 7 | E 15 | E 15 | E 15 | E 14 | N 8 | S 10 |
21 | 38 | 15 | 14 | 22 | 52 | 32 | 22 | 10 | 10 | 14 | 13 | 25 | 14 | 8 | 39 | 39 | 39 | 61 | 18 | 54 | |
Swell 3 Height (m) Direction Period (s) | E 14 | ESE 9 | SW 8 | SSW 8 | E 12 | E 9 | E 8 | S 8 | E 9 | SE 10 | SE 10 | E 9 | S 7 | SE 9 | E 16 | SW 8 | SW 8 | — | — | S 9 | E 14 |
4 | 28 | 10 | 13 | 3 | 24 | 22 | 21 | 6 | 16 | 16 | 14 | 9 | 13 | 20 | 3 | 2 | — | — | 6 | 62 | |
Wind waves Height (m) Direction Period (s) | NE 7 | N 7 | N 8 | NNW 7 | NNW 7 | — | — | — | NNW 8 | N 8 | N 8 | ENE 4 | ENE 3 | E 4 | ESE 4 | ESE 6 | ESE 9 | SE 10 | SE 10 | E 6 | E 6 |
286 | 257 | 442 | 365 | 231 | — | — | — | 226 | 196 | 217 | 3 | 4 | 7 | 23 | 216 | 595 | 1226 | 830 | 112 | 120 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 800 | 727 | 670 | 670 | 14 | 13 | 670 | 670 | 607 | 995 | 680 | 14 | 14 | 18 | 670 | 670 | 836 | 618 | 670 | 670 | 670 |
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.










