Surf Forecasts:
Yonabaru surf forecast from 12 Sep 2026:
- Most powerful swell: Sunday 20 Sep, 3AM (local time) - 8ft (2.4m), 17s period, E swell with 3,393 kJ wave energy.
Best Forecast Surf Conditions for Yonabaru this week:
The most powerful waves expected at Yonabaru in the next 16 days are 2.4m 17s and forecast to arrive on Sunday (Sep 20) at 3AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.3m 8s period and expected on Saturday (Sep 19) at 12AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 3AM (Sun 20th Sep) | 8ft (2.4m) 17s |
Table - best surf conditions forecast for Yonabaru over the next 16 days.
The Lowdown
Alright mates, Rusty here again, but in feet for those who think that way. Let’s have a look at Yonabaru.
It’s gonna be a long wait. From now right through Friday the 19th of September, there’s no surf worth mentioning. Tiny, messy, onshore, and rainy. Don’t bother.
The first real pulse arrives on Saturday morning, the 20th of September. This is the one to circle. The combined swell energy is pumping at 4523 (strong), with a 10ft swell from the east on a very long 16-second period. That’s real groundswell and it’ll be clean with a cross-offshore breeze. But 10ft is heavy – experts only. Beginners, don’t even think about it. That long period will make it powerful and a bit wonky at the beach, but for the right crew, it’s the session of the outlook.
Sunday the 21st still has a solid 8ft east swell, but the wind is a stiff 25 mph cross-offshore, so it’s clean but getting gnarly. Energy drops to 3022.
After that, it’s small, scattered, and messy through the week. There’s a brief window of clean, waist-high waves mid-week, but nothing special. Then by Saturday the 27th and Monday the 28th of September, the wind howls up to 31 mph and beyond, with the swell bouncing up to 6ft and 8ft, but it’s blown out and lumpy. That Monday the 28th is a full-blown gale – better for kites.
So, plain and simple: Saturday the 20th is your only real chance for a good, clean, big-wave session. The rest is a struggle.
Rusty.
Short Range ForecastModerate rain (total 19mm), heaviest on Mon night. Warm (max 29°C on Mon afternoon, min 27°C on Sat night). Wind will be generally light. | Days 5-7 Weather SummaryLight rain (total 7mm), mostly falling on Thu morning. Warm (max 29°C on Wed afternoon, min 27°C on Tue night). Wind will be generally light. | ||||||||||||||||||
Sunday 13 | Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | ||||||||||||||
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) | E 14 | E 14 | E 7 | ESE 8 | ESE 8 | ESE 8 | ESE 9 | ESE 9 | ESE 9 | E 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | E 9 | E 13 | E 8 | E 8 | ENE 8 |
Wave Graph  | |||||||||||||||||||
 kJ | 62 | 61 | 117 | 155 | 144 | 154 | 162 | 166 | 146 | 176 | 147 | 144 | 113 | 108 | 106 | 84 | 71 | 71 | 115 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | cross-on | cross-on | on | on | on | on | on | on | on | cross-on | cross-on | on | on | on | cross-on | cross-on | cross-on | cross-on |
High Tide | 7:35AM2.21m | 7:49PM2.16m | 8:13AM2.16m | 8:15PM2.15m | 8:52AM2.06m | 8:43PM2.13m | 9:34AM1.93m | 9:11PM2.07m | 10:23AM1.77m | 9:44PM1.99m | 11:28AM1.62m | 10:24PM1.88m | |||||||
Low Tide | 1:27AM0.51m | 1:44PM0.51m | 2:00AM0.44m | 2:14PM0.62m | 2:35AM0.41m | 2:43PM0.76m | 3:12AM0.42m | 3:13PM0.91m | 3:55AM0.48m | 3:45PM1.07m | 4:45AM0.57m | 4:23PM1.23m | |||||||
 |  |  |  | |  | | | | | | |  | | | | | | | |
 | — | 6:13 | — | — | 6:13 | — | — | 6:13 | — | — | 6:13 | — | — | 6:15 | — | — | 6:15 | — | — |
 | 6:37 | — | 6:36 | — | — | 6:35 | — | — | 6:34 | — | — | 6:32 | — | — | 6:31 | — | — | 6:30 | — |
mm | — | — | 2 | 3 | 1 | — | 11 | 2 | — | — | — | 1 | 2 | 2 | — | 1 | — | 1 | — |
Temp °C | 27 | 28 | 28 | 27 | 28 | 29 | 27 | 29 | 29 | 28 | 28 | 29 | 27 | 29 | 29 | 27 | 29 | 29 | 27 |
Feels °C | 29 | 30 | 30 | 30 | 31 | 31 | 30 | 32 | 31 | 31 | 32 | 32 | 30 | 32 | 32 | 30 | 32 | 32 | 30 |
Swell 1 Height (m) Direction Period (s) | NNW 6 | E 14 | E 14 | E 13 | ESE 8 | ESE 8 | ESE 9 | ESE 9 | ESE 9 | E 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | E 9 | E 9 | E 8 | E 8 | E 12 |
| kJ | 13 | 61 | 62 | 56 | 144 | 154 | 162 | 166 | 146 | 176 | 147 | 144 | 113 | 108 | 106 | 73 | 71 | 71 | 44 |
Swell 2 Height (m) Direction Period (s) | E 14 | ESE 9 | NNW 6 | N 5 | E 13 | E 13 | E 13 | E 12 | NNW 6 | NNW 6 | NNW 6 | NNW 7 | NNW 7 | NNW 6 | E 13 | E 13 | N 7 | E 12 | S 8 |
| kJ | 62 | 16 | 7 | 8 | 55 | 54 | 54 | 49 | 14 | 6 | 16 | 35 | 37 | 24 | 84 | 84 | 15 | 45 | 12 |
Swell 3 Height (m) Direction Period (s) | S 7 | NNW 6 | S 6 | S 6 | N 5 | N 5 | N 5 | NW 7 | E 12 | NW 7 | E 14 | E 14 | E 14 | E 14 | NNW 6 | NNW 7 | E 12 | N 7 | N 9 |
| kJ | 8 | 7 | 3 | 3 | 5 | 2 | 2 | 11 | 47 | 2 | 64 | 58 | 100 | 91 | 12 | 15 | 47 | 15 | 6 |
Wind waves Height (m) Direction Period (s) | E 5 | ESE 6 | E 7 | ESE 8 | — | — | — | — | — | — | — | — | ENE 2 | — | — | ENE 3 | — | — | ENE 8 |
| kJ | 29 | 40 | 117 | 155 | — | — | — | — | — | — | — | — | 1 | — | — | 1 | — | — | 115 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 14 | 14 | 14 | 599 | 10 | 10 | 10 | 10 | 10 | 17 | 14 | 14 | 10 | 10 | 14 | 10 | 14 | 14 | 14 |
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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