Surf Forecasts:
Yonabaru surf forecast from 19 Aug 2026:
- Best quality surf: Wednesday 26 Aug, 6PM (local time) - 4.5ft (1.3m), 13s period, ENE swell with offshore winds.
- Most powerful swell: Monday 24 Aug, 6PM (local time) - 13ft (4.0m), 17s period, ESE swell with 9,843 kJ wave energy.
- Next surfable swell (1★+): Wednesday 26 Aug, 6PM (local time) - 4.5ft (1.3m), 13s period with ENE 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 Wednesday (Aug 26) at 6PM. The primary swell is predicted to be 1.3m and 13s period. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Yonabaru in the next 16 days are 4.0m 17s and forecast to arrive on Monday (Aug 24) at 6PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 4.0m 10s period and expected on Saturday (Aug 22) at 3AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6PM (Wed 26th Aug) | 4.5ft (1.3m) 13s |
| Best Surf | 6PM (Wed 26th Aug) | 4.5ft (1.3m) 13s |
| Most Powerful | 6PM (Mon 24th Aug) | 13ft (4.0m) 17s |
Table - best surf conditions forecast for Yonabaru over the next 16 days.
The Lowdown
Alright, Rusty here. Let's take a look at what's on offer for Yonabaru.
First up, the water temp is sitting at 84°F, which is about normal for this time of year, so no surprises there.
Honestly, the outlook for the next 16 days is a tough one. We're looking at a long stretch of poor conditions, starting now and running deep into the forecast period. The wind is a big part of the problem, with a persistent cross-onshore flow that'll keep things messy. For the first few days, through to the 25th of August, every session is a write-off - the swell is either too small, too short-period, or the wind is just too strong. On the 24th and 25th, there’s a heap of energy in the water (combined energy hits 1592 and then 6663 on the 24th afternoon, and 4165 on the 25th morning), but with that cross-onshore wind and short-period swell, it's not going to be any good for a paddle. That big, powerful swell is more for the kite surfers if you ask me.
We do finally get a bit of a glimmer on Wednesday the 26th of August. The morning session sees a clean window with a cross-offshore breeze from the NW, and a 6 ft swell from the E at a decent 13 second period. The combined energy is still strong at 1189, but the quality is only marginal. It's a standout purely because everything else is so poor. The swell direction is E, which is close to the optimum NE, so it's not perfect, but it's the best you'll get. Not one for the groms though, as 6 ft is pushing it for beginners.
The following day, Thursday the 27th, we get a true offshore wind from the W, but the swell drops right off to 2 ft from the ENE with a 12-second period. It's surfable, but very ordinary. After that, it's back to the doldrums with small, weak, and onshore conditions for the rest of the run through to the 4th of September.
So, the pick of a very average bunch is Wednesday the 26th of August at Yonabaru. It's not a classic, but it's the only window with a bit of size and clean conditions.
Rusty.
Short Range ForecastHeavy rain (total 31mm), heaviest during Fri night. Warm (max 29°C on Thu morning, min 26°C on Fri night). Winds increasing (moderate winds from the ESE on Thu afternoon, near gales from the SE by Fri afternoon). | Days 4-6 Weather SummaryModerate rain (total 17mm), heaviest on Sun morning. Warm (max 29°C on Tue morning, min 27°C on Sun morning). Winds decreasing (fresh winds from the ESE on Sun morning, light winds from the NNE by Tue night). | ||||||||||||||||||||
Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | |||||||||||||||
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 8 | ESE 7 | E 6 | SE 7 | SE 7 | SSE 10 | SSE 10 | SSE 9 | E 16 | ESE 15 | SE 16 | E 15 | SE 9 | ESE 18 | ESE 17 | E 16 | ESE 15 | E 14 | E 13 | E 13 | ENE 13 |
Wave Graph  | |||||||||||||||||||||
 kJ | 238 | 168 | 188 | 379 | 731 | 0 | 0 | 0 | 5 | 71 | 68 | 1123 | 1592 | 6663 | 2862 | 3652 | 2627 | 1984 | 1172 | 812 | 367 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | on | cross-on | cross-on | cross-off | cross-off | cross-off | off |
High Tide | 11:45AM1.63m | 11:12PM1.91m | 1:25PM1.53m | 00:10AM1.84m | 3:38PM1.57m | 1:38AM1.79m | 4:55PM1.69m | 3:12AM1.83m | 5:37PM1.81m | 4:23AM1.93m | 6:10PM1.92m | 5:17AM2.04m | 6:38PM2.01m | ||||||||
Low Tide | 4:58PM1.15m | 6:30AM0.74m | 5:55PM1.32m | 8:02AM0.73m | 7:49PM1.42m | 9:29AM0.65m | 9:46PM1.39m | 10:33AM0.53m | 10:52PM1.26m | 11:22AM0.42m | 11:37PM1.12m | 12:03PM0.34m | 00:15AM0.96m | ||||||||
 | |  | | |  | | | | | | | | |  |  | |  | |  | | |
 | 6:03 | — | — | 6:03 | — | — | 6:03 | — | — | 6:03 | — | — | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — |
 | — | 7:00 | — | — | 7:00 | — | — | 6:59 | — | — | 6:58 | — | — | 6:57 | — | — | 6:55 | — | — | 6:54 | — |
mm | 1 | 2 | 4 | 3 | 2 | 7 | 3 | 3 | 6 | 5 | 2 | 4 | 2 | 4 | — | — | — | — | — | — | 3 |
Temp °C | 29 | 28 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 28 | 29 | 29 | 27 | 29 | 29 | 28 |
Feels °C | 31 | 30 | 28 | 27 | 24 | 24 | 25 | 26 | 25 | 26 | 26 | 27 | 28 | 28 | 29 | 31 | 31 | 30 | 30 | 31 | 31 |
Swell 1 Height (m) Direction Period (s) | S 9 | S 9 | S 9 | S 8 | SW 9 | SW 10 | SW 10 | SW 10 | SW 10 | SW 10 | SSE 10 | SSE 10 | SSW 10 | SSW 10 | ESE 17 | E 16 | ESE 15 | E 14 | E 13 | E 13 | ENE 13 |
| kJ | 111 | 189 | 188 | 92 | 91 | 100 | 36 | 100 | 196 | 59 | 1906 | 1064 | 61 | 85 | 2862 | 3652 | 2627 | 1984 | 1172 | 812 | 367 |
Swell 2 Height (m) Direction Period (s) | SW 9 | SW 9 | SW 9 | SW 8 | — | — | — | — | E 16 | ESE 15 | SW 10 | ESE 18 | SSE 9 | SSW 10 | SSW 10 | SE 7 | SSW 10 | SSW 10 | SSW 9 | SSW 10 | SSW 9 |
| kJ | 12 | 12 | 22 | 54 | — | — | — | — | 5 | 71 | 46 | 126 | 495 | 122 | 125 | 194 | 245 | 282 | 220 | 197 | 189 |
Swell 3 Height (m) Direction Period (s) | SW 9 | SW 9 | ESE 11 | ENE 8 | — | — | — | — | E 16 | ESE 18 | SE 16 | ENE 13 | SW 10 | — | — | SSW 10 | — | SE 10 | SE 10 | SE 10 | SSE 10 |
| kJ | 27 | 12 | 11 | 13 | — | — | — | — | 5 | 31 | 68 | 17 | 76 | — | — | 201 | — | 15 | 17 | 16 | 9 |
Wind waves Height (m) Direction Period (s) | ESE 8 | ESE 7 | E 6 | SE 7 | SE 7 | SSE 10 | SSE 10 | SSE 9 | SSE 9 | SSE 10 | SSE 10 | E 15 | SE 9 | ESE 18 | SE 9 | ESE 8 | ENE 6 | NNE 5 | — | N 4 | NNW 5 |
| kJ | 238 | 168 | 188 | 379 | 731 | 2375 | 2424 | 1447 | 1608 | 1883 | 2826 | 1123 | 1592 | 6663 | 1312 | 319 | 65 | 15 | — | 20 | 29 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 13 | 13 | 607 | 607 | 599 | 599 | 616 | 616 | 599 | 607 | 607 | 607 | 791 | 607 | 607 | 16 | 47 | 13 | 48 | 607 | 0 |
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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