Surf Forecasts:
Yonabaru surf forecast from 31 Aug 2026:
- Best quality surf: Thursday 3 Sep, 6PM (local time) - 4.5ft (1.4m), 10s period, E swell with cross-offshore winds.
- Most powerful swell: Wednesday 2 Sep, 3AM (local time) - 8ft (2.5m), 9s period, ESE swell with 1,016 kJ wave energy.
- Next surfable swell (1★+): Thursday 3 Sep, 6PM (local time) - 4.5ft (1.4m), 10s period with E 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 Thursday (Sep 03) at 6PM. The primary swell is predicted to be 1.4m and 10s 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 2.5m 9s and forecast to arrive on Wednesday (Sep 02) at 3AM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.6m 10s period and expected on Wednesday (Sep 02) at 9PM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6PM (Thu 3rd Sep) | 4.5ft (1.4m) 10s |
| Best Surf | 6PM (Thu 3rd Sep) | 4.5ft (1.4m) 10s |
| Most Powerful | 3AM (Wed 2nd Sep) | 8ft (2.5m) 9s |
Table - best surf conditions forecast for Yonabaru over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s get into it.
First up, straight off the bat, we’ve got a bit of a wait on our hands. The first few days are a write-off. Tuesday the 1st through Wednesday the 2nd have onshore winds thrashing Yonabaru, with swell pushing 7ft but the wind is just a mess. It’s not until Thursday the 3rd that things start to look half-decent.
Thursday morning the 3rd, the wind switches to a cross-offshore from the WNW, and we’ve got 6ft of east swell at 10 seconds. The wave energy is moderate (792), and the combo of that offshore wind and a decent period should make for some clean, lined-up waves. It’s a bit of a late call, but by Thursday afternoon the wind goes fully offshore from the west at 15 mph, and the swell drops to 5ft but the energy is still decent (472). This is your best window in the whole outlook. The break is fairly consistent, so you’ll get waves. Water temp is about average for the time of year, nothing wild.
Friday the 4th is a letdown – the swell drops right off to 2ft and the wind turns onshore again. That’s the end of the good stuff for a while. From Saturday the 5th right through to Monday the 14th, it’s a long stretch of junk. Winds are either cross-onshore, onshore, or howling from the north at 15 to 22 mph. The swell pops up again on Saturday the 12th with 8ft from the NNW, but the wind is a strong cross-offshore at 19 mph, and the wave energy is very strong (1155). That’s expert territory. The period is short at 9 seconds, so it’ll be a bit lumpy and difficult. For the average surfer, it’s a pass.
Monday the 14th and Tuesday the 15th see the swell hover around 7ft to 7ft, but the wind is a fresh cross-onshore at 19 to 25 mph. The wave energy is moderate to strong (949 on Tuesday), but the wind is just too strong to make it clean. At this size and with that wind, this setup looks more interesting for kite surfing than paddle surfing.
Wednesday the 16th is a complete write-off with 37 mph onshore winds.
So, the standout here is a narrow window: Thursday the 3rd. The morning has a cross-offshore breeze with 6ft east swell, and the afternoon turns fully offshore with 5ft. It’s the only time you’ll get clean, surfable waves in the whole 16 days. The rest is blown out or too big for the conditions. Get out there Thursday if you can.
Rusty.
Short Range ForecastModerate rain (total 17mm), heaviest on Thu afternoon. Warm (max 29°C on Wed morning, min 26°C on Wed night). Winds decreasing (fresh winds from the E on Tue morning, light winds from the W by Thu night). | Days 4-6 Weather SummaryHeavy rain (total 22mm), heaviest during Sun morning. Warm (max 29°C on Fri afternoon, min 26°C on Sat night). Wind will be generally light. | ||||||||||||||||||||
Tuesday 1 | Wednesday 2 | Thursday 3 | Friday 4 | Saturday 5 | Sunday 6 | Monday 7 | |||||||||||||||
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 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | E 10 | E 10 | E 10 | E 10 | N 8 | N 7 | N 7 | N 8 | N 10 | N 9 | N 9 | N 8 | E 5 | E 6 | E 6 | E 5 |
Wave Graph  | |||||||||||||||||||||
 kJ | 921 | 847 | 993 | 828 | 560 | 865 | 832 | 452 | 186 | 97 | 68 | 45 | 173 | 220 | 241 | 165 | 69 | 75 | 127 | 112 | 56 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | on | on | on | on | cross | cross-off | cross-off | cross-off | cross-off | cross | cross | cross | cross-on | cross | cross-on | on | cross-on | cross-on | cross-on | cross |
High Tide | 9:20AM2.02m | 9:18PM2.09m | 10:05AM1.87m | 9:49PM2.03m | 10:59AM1.71m | 10:24PM1.95m | 12:18PM1.57m | 11:11PM1.85m | 2:28PM1.53m | 00:28AM1.76m | 4:15PM1.63m | 2:19AM1.75m | 5:04PM1.76m | ||||||||
Low Tide | 3:14PM0.77m | 3:47AM0.54m | 3:45PM0.94m | 4:34AM0.60m | 4:18PM1.11m | 5:32AM0.67m | 5:02PM1.28m | 6:54AM0.73m | 6:31PM1.41m | 8:32AM0.70m | 8:58PM1.41m | 9:52AM0.61m | 10:21PM1.28m | ||||||||
 | |  |  | |  | | | | | | | | |  | | | | | |  | |
 | 6:07 | — | — | 6:07 | — | — | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — |
 | — | 6:49 | — | — | 6:47 | — | — | 6:46 | — | — | 6:45 | — | — | 6:45 | — | — | 6:44 | — | — | 6:43 | — |
mm | 2 | 2 | 4 | — | — | — | 2 | 5 | 2 | 2 | 5 | 3 | — | 4 | — | 6 | 1 | 1 | — | 3 | 1 |
Temp °C | 28 | 28 | 27 | 29 | 29 | 26 | 27 | 27 | 27 | 28 | 29 | 27 | 29 | 29 | 27 | 28 | 29 | 27 | 29 | 28 | 27 |
Feels °C | 28 | 29 | 27 | 30 | 30 | 26 | 29 | 30 | 32 | 33 | 33 | 31 | 32 | 32 | 30 | 32 | 33 | 30 | 33 | 32 | 31 |
Swell 1 Height (m) Direction Period (s) | SW 10 | SW 9 | SW 10 | SSW 10 | SSW 10 | E 10 | E 10 | E 10 | SW 12 | SW 11 | S 10 | S 9 | SSW 9 | SSW 8 | SSW 8 | S 8 | S 8 | S 8 | S 8 | SSW 8 | S 9 |
| kJ | 33 | 41 | 79 | 175 | 261 | 865 | 832 | 452 | 303 | 258 | 190 | 203 | 237 | 190 | 212 | 161 | 177 | 133 | 48 | 50 | 40 |
Swell 2 Height (m) Direction Period (s) | SSW 8 | SSW 8 | S 8 | E 12 | E 12 | SSW 10 | SSW 11 | SSW 12 | E 10 | S 9 | SW 10 | N 7 | N 8 | N 10 | N 9 | N 9 | N 8 | N 8 | WNW 6 | WNW 6 | ESE 8 |
| kJ | 14 | 21 | 5 | 77 | 75 | 302 | 352 | 456 | 186 | 164 | 163 | 45 | 173 | 220 | 241 | 165 | 69 | 34 | 23 | 17 | 22 |
Swell 3 Height (m) Direction Period (s) | S 8 | — | E 14 | — | — | — | S 8 | N 7 | N 7 | N 8 | N 7 | SW 10 | ESE 8 | ESE 8 | E 10 | E 9 | NW 7 | NW 6 | N 8 | N 7 | N 8 |
| kJ | 10 | — | 35 | — | — | — | 12 | 31 | 85 | 97 | 68 | 98 | 20 | 11 | 29 | 26 | 22 | 15 | 18 | 16 | 18 |
Wind waves Height (m) Direction Period (s) | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | — | NW 3 | W 4 | — | — | — | — | — | — | — | — | E 9 | E 5 | E 6 | E 6 | E 5 |
| kJ | 921 | 847 | 993 | 828 | 560 | — | 5 | 21 | — | — | — | — | — | — | — | — | 25 | 75 | 127 | 112 | 56 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 727 | 607 | 607 | 599 | 14 | 13 | 14 | 14 | 0 | 0 | 13 | 13 | 13 | 14 | 13 | 13 | 10 | 13 | 16 | 785 | 13 |
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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