
Surf Forecasts:
Yonabaru surf forecast from 10 Sep 2026:
- Most powerful swell: Monday 14 Sep, 6AM (local time) - 4.5ft (1.4m), 8s period, E swell with 235 kJ wave energy.
Best Forecast Surf Conditions for Yonabaru this week:
The most powerful waves expected at Yonabaru in the next 16 days are 1.4m 8s and forecast to arrive on Monday (Sep 14) at 6AM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.3m 8s period and expected on Tuesday (Sep 15) at 6PM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 6AM (Mon 14th Sep) | 4.5ft (1.4m) 8s |
Table - best surf conditions forecast for Yonabaru over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s be honest: the next week and a half at Yonabaru is a tough one. We’re looking at a long stretch of nothing special, with the first true glimmer of hope not arriving until late in the game.
The pattern starts with a real dud. From Friday the 11th right through to Monday the 14th, we’ve got weak, messy swell and onshore winds. The water temp is about average for the time of year, so nothing wild there. It’s just a flat, choppy mess. The swell energy is weak, barely cracking 100-200 (162) on Friday, and the wind is on it or cross-onshore. There’s nothing to get excited about for a solid week.
Tuesday the 15th through Thursday the 17th doesn’t get much better. We see a bit of a bump in energy, with the combined energy sitting in the low 200s (237) on Tuesday, but the wind is still cross-onshore, keeping it choppy and uninviting. The swell is tiny and the period is short, so you’re just bobbing around.
Now, a shift comes around the 18th and 19th. Swell energy starts to ramp up hard, hitting 646 on Friday the 18th afternoon and then a massive 3258 on Saturday the 19th. That’s a strong pulse of energy, but it comes with a heavy cross-shore wind. By Sunday the 20th, the swell is 10ft from the ESE with a long period of 16s, and the energy is a beastly 5056. But the wind is a fresh 22 mph cross-shore, making it lumpy and only marginal. This is a solid, powerful swell, but the wind is a killer for clean surfing. At 10ft, it’s strictly for the experts, and even then, it’s a battle.
The real standouts, the only ones worth circling, are on Friday the 25th and Saturday the 26th. On Friday the 25th, the wind goes glassy – a light breeze from the east and east-northeast. The swell is 4ft from the SE with a nice 14s period, and the energy is a solid 548. The conditions are described as “glassy” and “expect good surf conditions.” This is the one. It’s clean, it’s got some push, and the offshore wind will make it smooth. The crowd could be a factor though, as Yonabaru is sometimes busy, so get there early.
Saturday the 26th, the swell jumps to 10ft from the ESE with a 14s period, and the energy is a massive 3465. That’s a lot of power, but the wind switches to a light cross-on, which will put some ripples on the face. Still, for the experienced crew, that’s a big, powerful wave to play with. It’s big, so leave the foamie at home.
So, to wrap it up: the first week is a write-off. The best bet by a long shot is Friday the 25th for clean, fun waves on the glassy morning. Saturday the 26th offers a big, powerful swell for the experts, but it won’t be as clean. Don’t waste your time before that.
Rusty.
Short Range ForecastLight rain (total 7mm), mostly falling on Thu night. Warm (max 29°C on Fri morning, min 27°C on Thu night). Wind will be generally light. | Days 5-7 Weather SummaryHeavy rain (total 28mm), heaviest during Mon afternoon. Warm (max 29°C on Wed morning, min 26°C on Mon afternoon). Wind will be generally light. | ||||||||||||||||||
Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | Tuesday 15 | Wednesday 16 | ||||||||||||||
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) | N 9 | NNW 8 | NNW 8 | ESE 6 | E 14 | E 14 | E 14 | E 6 | E 7 | E 8 | E 8 | ESE 8 | ESE 9 | ESE 9 | E 9 | E 9 | ESE 9 | ESE 9 | ESE 9 |
Wave Graph | |||||||||||||||||||
157 | 94 | 68 | 49 | 61 | 64 | 62 | 64 | 123 | 168 | 149 | 151 | 197 | 206 | 165 | 173 | 197 | 149 | 110 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | on | on | cross-on | on | on | on | cross-on | cross-on | on | cross-on | cross-on | on | cross-on | cross-on | cross-on | cross-on | on | on |
High Tide | 6:18AM2.16m | 6:58PM2.10m | 6:58AM2.21m | 7:23PM2.14m | 7:35AM2.21m | 7:49PM2.16m | 8:13AM2.16m | 8:15PM2.15m | 8:52AM2.06m | 8:43PM2.13m | 9:34AM1.93m | 9:11PM2.07m | |||||||
Low Tide | 00:21AM0.77m | 12:42PM0.38m | 00:54AM0.63m | 1:14PM0.43m | 1:27AM0.51m | 1:44PM0.51m | 2:00AM0.44m | 2:14PM0.62m | 2:35AM0.41m | 2:43PM0.76m | 3:12AM0.42m | 3:13PM0.91m | |||||||
— | 6:11 | — | — | 6:11 | — | — | 6:13 | — | — | 6:13 | — | — | 6:13 | — | — | 6:13 | — | — | |
6:38 | — | 6:37 | — | — | 6:37 | — | — | 6:36 | — | — | 6:35 | — | — | 6:34 | — | — | 6:32 | — | |
mm | 2 | 1 | 1 | 1 | — | — | — | — | 2 | 1 | 1 | 9 | 4 | 3 | 6 | 2 | 2 | — | — |
Temp °C | 28 | 29 | 29 | 27 | 28 | 28 | 27 | 28 | 28 | 27 | 27 | 26 | 27 | 28 | 28 | 27 | 29 | 29 | 27 |
Feels °C | 33 | 32 | 32 | 30 | 31 | 30 | 30 | 30 | 30 | 30 | 29 | 28 | 29 | 31 | 31 | 30 | 33 | 33 | 31 |
Swell 1 Height (m) Direction Period (s) | N 9 | NNW 8 | NNW 8 | N 8 | N 7 | N 7 | NNW 6 | E 14 | E 14 | N 5 | E 8 | ESE 8 | ESE 9 | ESE 9 | E 9 | E 9 | ESE 9 | ESE 9 | ESE 9 |
157 | 94 | 68 | 41 | 26 | 24 | 14 | 61 | 62 | 9 | 149 | 151 | 197 | 206 | 165 | 173 | 197 | 149 | 110 | |
Swell 2 Height (m) Direction Period (s) | SE 9 | ESE 8 | ESE 8 | E 15 | E 14 | E 14 | E 14 | N 6 | N 6 | E 13 | E 13 | E 13 | E 13 | E 13 | E 12 | NNW 6 | E 14 | E 14 | E 14 |
20 | 62 | 50 | 38 | 61 | 64 | 62 | 7 | 7 | 56 | 55 | 54 | 54 | 28 | 28 | 7 | 61 | 58 | 100 | |
Swell 3 Height (m) Direction Period (s) | ESE 6 | S 7 | S 7 | S 7 | S 7 | S 6 | ESE 9 | ESE 9 | S 6 | S 6 | N 5 | S 6 | SW 8 | N 4 | SW 8 | SW 8 | NNW 6 | NNW 6 | NNW 6 |
8 | 9 | 8 | 8 | 8 | 7 | 17 | 16 | 3 | 3 | 5 | 1 | 3 | 3 | 11 | 11 | 11 | 6 | 7 | |
Wind waves Height (m) Direction Period (s) | — | SE 4 | — | ESE 6 | ESE 6 | ESE 6 | E 5 | E 6 | E 7 | E 8 | — | NNE 3 | NNE 4 | — | — | — | — | SE 5 | SE 5 |
— | 6 | — | 49 | 44 | 36 | 33 | 64 | 123 | 168 | — | 8 | 24 | — | — | — | — | 14 | 9 | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 10 | 10 | 27 | 10 | 26 | 26 | 14 | 14 | 14 | 14 | 14 | 607 | 607 | 47 | 17 | 17 | 10 | 10 | 10 |
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.










