Surf Forecasts:
Yonabaru surf forecast from 12 Sep 2026:
- Most powerful swell: Saturday 19 Sep, 3PM (local time) - 4ft (1.2m), 16s period, ESE swell with 730 kJ wave energy.
Best Forecast Surf Conditions for Yonabaru this week:
The most powerful waves expected at Yonabaru in the next 16 days are 1.2m 16s and forecast to arrive on Saturday (Sep 19) at 3PM. 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 Friday (Sep 18) at 9AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 3PM (Sat 19th Sep) | 4ft (1.2m) 16s |
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 the table for the next couple of weeks.
Honestly, mate, this stretch is a tough one. We've got a long run of poor conditions ahead. It's not that there's no swell, but the quality just isn't there for a good paddle session.
Looking at Yonabaru, starting from Saturday the 12th, we're seeing small surf, around 1ft to 4ft, but the wind is onshore or cross-onshore pretty much the whole time, making for chop and messy conditions. The water temp is sitting at a warm 83°, pretty normal for this time of year.
We do get a bit of a boost in size around Sunday the 20th, with a solid 10ft swell from the east, but it's getting hammered by a strong 28 mph crosswind. Even though there's a lot of wave energy in the water (3442), it's just not going to be clean for a paddle. This setup looks far more interesting for kite surfing than for a traditional surf.
Towards the very end of the run, on Sunday the 27th, we see a tiny 1ft swell but with glassy conditions in the morning. The wind is totally calm. It's tiny, but for a complete beginner on a longboard, it might be the only window that's not blown out.
So, to be straight with you, there are no standout days in this 16-day outlook. The consistent poor conditions are a real bummer, but that's how it goes sometimes. Keep an eye on the charts, as things can change.
Rusty.
Short Range ForecastModerate rain (total 13mm), heaviest on Mon night. Warm (max 29°C on Sat morning, min 27°C on Sat night). Wind will be generally light. | Days 4-6 Weather SummaryModerate rain (total 13mm), heaviest on Wed morning. Warm (max 29°C on Tue morning, min 27°C on Tue morning). Wind will be generally light. | ||||||||||||||||||||
Saturday 12 | Sunday 13 | Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | |||||||||||||||
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) | E 14 | E 14 | E 14 | E 14 | E 7 | ESE 8 | ESE 8 | ESE 8 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | E 9 | E 8 | ENE 6 |
Wave Graph  | |||||||||||||||||||||
 kJ | 61 | 64 | 62 | 61 | 124 | 151 | 171 | 184 | 189 | 166 | 173 | 181 | 149 | 149 | 121 | 116 | 110 | 101 | 94 | 92 | 51 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | on | on | cross-on | on | on | on | on | on | on | on | on | on | cross-on | on | on | on | on | on | cross-on | cross-on |
High Tide | 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 | 10:23AM1.77m | 9:44PM1.99m | 11:28AM1.62m | 10:24PM1.88m | ||||||||
Low Tide | 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 | 3:55AM0.48m | 3:45PM1.07m | 4:45AM0.57m | 4:23PM1.23m | ||||||||
 | |  |  |  | | | | | | | | | |  | | |  | | | | |
 | 6:11 | — | — | 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 | — | — | 1 | — | 4 | 1 | — | — | 7 | 2 | 1 | 1 | 6 | 1 | 1 | 1 | — | — | — | 1 | 1 |
Temp °C | 29 | 29 | 27 | 28 | 28 | 27 | 28 | 28 | 27 | 29 | 29 | 28 | 29 | 29 | 28 | 29 | 29 | 27 | 28 | 29 | 27 |
Feels °C | 32 | 32 | 29 | 30 | 30 | 30 | 31 | 30 | 30 | 32 | 32 | 31 | 32 | 32 | 31 | 32 | 31 | 30 | 31 | 31 | 30 |
Swell 1 Height (m) Direction Period (s) | N 7 | ESE 6 | NNW 6 | E 14 | E 14 | E 13 | ESE 8 | ESE 8 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | E 12 | E 8 | E 8 |
| kJ | 25 | 22 | 13 | 61 | 62 | 56 | 171 | 184 | 189 | 166 | 173 | 181 | 149 | 149 | 121 | 116 | 110 | 101 | 47 | 92 | 33 |
Swell 2 Height (m) Direction Period (s) | E 14 | N 7 | E 14 | ESE 9 | N 6 | N 5 | E 13 | E 13 | E 13 | E 13 | E 12 | NNW 5 | E 14 | E 14 | E 14 | E 14 | E 13 | E 13 | S 8 | E 12 | E 12 |
| kJ | 61 | 24 | 62 | 16 | 6 | 5 | 55 | 54 | 54 | 50 | 47 | 3 | 61 | 58 | 100 | 91 | 84 | 84 | 13 | 45 | 44 |
Swell 3 Height (m) Direction Period (s) | S 7 | E 14 | S 7 | NNW 6 | S 6 | S 6 | N 5 | N 5 | — | — | NNW 6 | E 15 | NNW 5 | NNW 6 | NNW 7 | NNW 6 | NNW 6 | NNW 6 | NNW 5 | S 8 | S 8 |
| kJ | 3 | 64 | 14 | 7 | 3 | 3 | 5 | 2 | — | — | 4 | 17 | 2 | 8 | 18 | 16 | 12 | 6 | 6 | 12 | 11 |
Wind waves Height (m) Direction Period (s) | SE 6 | — | E 5 | E 6 | E 7 | ESE 8 | — | — | — | — | — | — | — | — | — | — | — | — | E 9 | — | ENE 6 |
| kJ | 40 | — | 33 | 49 | 124 | 151 | — | — | — | — | — | — | — | — | — | — | — | — | 94 | — | 51 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 10 | 10 | 14 | 14 | 14 | 607 | 10 | 10 | 10 | 10 | 10 | 17 | 10 | 17 | 14 | 10 | 14 | 14 | 14 | 14 | 616 |
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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