Surf Forecasts:
Yonabaru surf forecast from 27 Aug 2026:
- Best quality surf: Monday 31 Aug, 9PM (local time) - 11ft (3.5m), 9s period, E swell with onshore winds.
- Most powerful swell: Wednesday 2 Sep, 12AM (local time) - 10ft (3.0m), 10s period, SE swell with 2,033 kJ wave energy.
- Next surfable swell (1★+): Monday 31 Aug, 9PM (local time) - 11ft (3.5m), 9s 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 Monday (Aug 31) at 9PM. The primary swell is predicted to be 3.5m and 9s period. The wind is predicted to be onshore as the swell arrives.
The most powerful waves expected at Yonabaru in the next 16 days are 3.0m 10s and forecast to arrive on Wednesday (Sep 02) at 12AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 3.0m 8s period and expected on Wednesday (Sep 02) at 6AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9PM (Mon 31st Aug) | 11ft (3.5m) 9s |
| Best Surf | 9PM (Mon 31st Aug) | 11ft (3.5m) 9s |
| Most Powerful | 12AM (Wed 2nd Sep) | 10ft (3.0m) 10s |
Table - best surf conditions forecast for Yonabaru over the next 16 days.
The Lowdown
Alright, let’s break it down for Yonabaru.
First week is a total bust. The wind is just straight garbage—onshore and cross-onshore for days. Swell shows up, sure, between 4 and 8 feet at times, but it’s all bumpy, choppy, wind-affected mess. Not surfable. You’re better off doing something else for the first 8 days.
It finally switches up Wednesday the 2nd of September. Wind goes light and offshore in the afternoon. Waves drop to about 5 feet from the east with a 10-second interval. Energy is moderate at 530, but the clean face makes all the difference. That afternoon is a turn for the better.
Thursday the 3rd and Friday the 4th of September are the money days. Friday morning is pure gold: clear skies, a light offshore breeze from the west at 9 mph, and clean 5-foot east swell. The period is solid enough, and the water temp sits at 84°F, right where it should be. Crowds can pop up here from time to time, but a clean Friday morning session is worth sharing the water for.
Saturday the 5th jumps up to 7-foot sets, but a fresh north wind makes it lumpy. That’s expert territory, if you’re game.
Then it just dies. From Sunday the 6th through the 12th, it’s tiny, weak, and mostly messy again. Energy readings drop to almost nothing. That’s a long flat spell to end the outlook.
Your move: wait until Wednesday the 2nd. Friday the 4th morning is the real deal. Offshore, chest-high, clean east swell. That’s your window.
Rusty.
Short Range ForecastLight rain (total 6mm), mostly falling on Sun night. Warm (max 29°C on Fri morning, min 27°C on Sat night). Mainly strong winds. | Days 4-6 Weather SummaryHeavy rain (total 37mm), heaviest during Mon morning. Warm (max 29°C on Tue morning, min 27°C on Mon morning). Winds decreasing (fresh winds from the NE on Mon morning, light winds from the WSW by Wed afternoon). | ||||||||||||||||||||
Friday 28 | Saturday 29 | Sunday 30 | Monday 31 | Tuesday 1 | Wednesday 2 | Thursday 3 | |||||||||||||||
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) | SE 6 | ESE 7 | ESE 7 | ESE 7 | ESE 7 | ESE 7 | E 7 | ESE 10 | E 10 | E 9 | E 9 | ESE 9 | ESE 8 | E 8 | ENE 10 | E 10 | E 10 | E 10 | E 10 | E 10 | ESE 10 |
Wave Graph  | |||||||||||||||||||||
 kJ | 201 | 237 | 384 | 263 | 208 | 168 | 239 | 703 | 1290 | 1178 | 1080 | 1807 | 1009 | 836 | 2033 | 609 | 530 | 392 | 467 | 441 | 445 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-on | on | on | on | on | cross-on | cross-on | cross-on | cross-on | cross-on | cross | cross | cross | cross | cross-off | cross-off | cross-off | cross-off | cross-off |
High Tide | 7:32PM2.12m | 7:23AM2.23m | 7:57PM2.14m | 8:01AM2.21m | 8:23PM2.15m | 8:39AM2.14m | 8:50PM2.13m | 9:20AM2.02m | 9:18PM2.09m | 10:05AM1.87m | 9:49PM2.03m | 10:59AM1.71m | 10:24PM1.95m | ||||||||
Low Tide | 1:12PM0.32m | 1:22AM0.69m | 1:44PM0.38m | 1:56AM0.60m | 2:14PM0.48m | 2:31AM0.54m | 2:44PM0.61m | 3:07AM0.52m | 3:14PM0.77m | 3:47AM0.54m | 3:45PM0.94m | 4:34AM0.60m | 4:18PM1.11m | ||||||||
 | |  | | |  |  | |  |  | | | | | | | | | | | | |
 | 6:05 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:09 | — | — |
 | — | 6:52 | — | — | 6:52 | — | — | 6:51 | — | — | 6:50 | — | — | 6:49 | — | — | 6:47 | — | — | 6:46 | — |
mm | — | — | — | — | — | — | — | — | 6 | 6 | 5 | 7 | 4 | 2 | 4 | 3 | 6 | — | 2 | — | — |
Temp °C | 29 | 29 | 28 | 29 | 29 | 28 | 29 | 28 | 27 | 28 | 28 | 28 | 29 | 29 | 28 | 29 | 29 | 27 | 28 | 28 | 27 |
Feels °C | 30 | 31 | 29 | 31 | 31 | 29 | 29 | 28 | 27 | 29 | 29 | 32 | 31 | 30 | 30 | 32 | 35 | 32 | 29 | 29 | 29 |
Swell 1 Height (m) Direction Period (s) | W 10 | SW 9 | SW 9 | SSW 9 | SSW 9 | S 8 | SSW 9 | SSW 9 | SSW 9 | SSW 10 | SSW 10 | SW 10 | S 10 | S 10 | ENE 10 | E 10 | E 10 | E 10 | E 10 | E 10 | ESE 10 |
| kJ | 239 | 75 | 81 | 106 | 119 | 90 | 106 | 106 | 58 | 74 | 54 | 16 | 175 | 237 | 1530 | 609 | 530 | 392 | 467 | 441 | 445 |
Swell 2 Height (m) Direction Period (s) | SW 9 | W 9 | W 8 | S 6 | S 7 | SW 9 | W 6 | SW 8 | SW 9 | S 10 | SSW 10 | SW 10 | SW 10 | SW 10 | — | WNW 10 | W 7 | SW 11 | SSW 10 | S 10 | S 10 |
| kJ | 112 | 80 | 34 | 30 | 38 | 47 | 1 | 45 | 22 | 56 | 56 | 16 | 15 | 15 | — | 9 | 56 | 117 | 394 | 306 | 346 |
Swell 3 Height (m) Direction Period (s) | E 12 | S 8 | W 8 | E 13 | E 13 | E 12 | SW 8 | — | — | SW 10 | SW 10 | — | E 15 | — | — | — | WNW 10 | W 6 | W 8 | WNW 8 | WNW 7 |
| kJ | 25 | 10 | 22 | 55 | 53 | 47 | 11 | — | — | 14 | 14 | — | 4 | — | — | — | 9 | 19 | 144 | 109 | 78 |
Wind waves Height (m) Direction Period (s) | SE 6 | ESE 7 | ESE 7 | ESE 7 | ESE 7 | ESE 7 | E 7 | ESE 10 | E 10 | E 9 | E 9 | ESE 9 | ESE 8 | E 8 | SE 10 | SSW 8 | S 9 | S 10 | — | — | — |
| kJ | 201 | 237 | 384 | 263 | 208 | 168 | 239 | 703 | 1290 | 1178 | 1080 | 1807 | 1009 | 836 | 2033 | 1046 | 442 | 467 | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 607 | 820 | 607 | 607 | 820 | 13 | 670 | 1013 | 616 | 792 | 1422 | 607 | 727 | 800 | 607 | 765 | 0 | 14 | 48 | 48 | 14 |
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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