
Surf Forecasts:
Yonabaru surf forecast from 9 Aug 2026:
- Best quality surf: Wednesday 12 Aug, 3AM (local time) - 2.5ft (0.7m), 11s period, E swell with cross-offshore winds.
- Most powerful swell: Monday 10 Aug, 9AM (local time) - 4ft (1.2m), 14s period, E swell with 526 kJ wave energy.
- Next surfable swell (1★+): Wednesday 12 Aug, 3AM (local time) - 2.5ft (0.7m), 11s 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 Wednesday (Aug 12) at 3AM. The primary swell is predicted to be 0.7m and 11s 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 1.2m 14s and forecast to arrive on Monday (Aug 10) at 9AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.8m 11s period and expected on Monday (Aug 10) at 9AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3AM (Wed 12th Aug) | 2.5ft (0.7m) 11s |
| Best Surf | 3AM (Wed 12th Aug) | 2.5ft (0.7m) 11s |
| Most Powerful | 9AM (Mon 10th Aug) | 4ft (1.2m) 14s |
Table - best surf conditions forecast for Yonabaru over the next 16 days.
The Lowdown
Alright, grab a seat and let’s talk about Yonabaru.
Honestly, it’s looking a bit flat and rough out there for the next couple of weeks. The surf window kicks off on Monday the 10th, but it’s not much to write home about – we’re looking at small, junky waves with a cross-onshore breeze chopping things up. The water is sitting at a warm 86°, which is a touch warmer than normal for this time of year, so you won’t need a thick suit, just patience.
The first few days are a write-off for anything decent. Monday and Tuesday are all under 4ft with poor conditions. The swell energy is weak to moderate, and with the wind blowing from the southeast, it’s just messy.
The first glimmer of hope comes on Wednesday the 12th. We finally get a bit of offshore wind in the morning, cleaning things up. It’s still small – around 2ft – but it’s surfable and the conditions are ordinary, not terrible. It’s something. Thursday the 13th has a moment of pure glass in the morning with 2ft, but it’s tiny and the energy is weak. This is really for the longboard crew only.
From Friday the 14th onwards, it’s a real struggle. The swell drops off, the wind goes onshore, and we’re looking at days of poor surf conditions and weak energy readings. The 15th, 16th, 17th, and 18th are all sub-3ft with onshore winds and the energy barely registering. It’s a flat spell, plain and simple.
Things get a little windier around the 20th with a fresh breeze, but the swell is small and messy. The 21st is pretty much non-existent – less than 1ft. That’s a paddling session, not a surfing one. The rest of the month follows the same pattern: small, weak, onshore slop. The 23rd has a little bump from the east at 3ft but the period is a poor 5 seconds, so it’s just wind chop.
Honestly, for Yonabaru, there’s no standout swell in this entire 16-day outlook. The best you can hope for is a small, clean wave on the 12th or 13th, but the energy is weak. The forecast confidence is low for the more distant days, but nothing on the horizon looks like it’s going to change things dramatically. It’s one of those stretches where you might be better off finding another hobby for a bit.
Just keep an eye on it; forecasts can change, but right now, it’s a lot of nothing.
Rusty.
Short Range ForecastModerate rain (total 14mm), heaviest on Tue night. Warm (max 30°C on Mon morning, min 26°C on Wed afternoon). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 5mm), mostly falling on Thu morning. Warm (max 30°C on Fri afternoon, min 26°C on Thu night). Wind will be generally light. | ||||||||||||||||||||
Monday 10 | Tuesday 11 | Wednesday 12 | Thursday 13 | Friday 14 | Saturday 15 | Sunday 16 | |||||||||||||||
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 13 | E 12 | E 12 | E 12 | E 12 | E 11 | E 11 | E 10 | E 10 | E 10 | E 10 | E 10 | E 10 | E 9 | E 11 | E 11 | E 10 | E 10 | E 10 | E 10 |
Wave Graph | |||||||||||||||||||||
526 | 280 | 248 | 181 | 136 | 134 | 84 | 83 | 51 | 50 | 75 | 53 | 31 | 30 | 15 | 61 | 61 | 77 | 77 | 53 | 51 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-on | cross-on | cross | cross | off | cross-off | cross | glassy | off | cross | glassy | glassy | cross-on | cross-on | on | cross-on | on | on | on |
High Tide | 6:07PM1.86m | 4:54AM2.01m | 6:39PM1.95m | 5:43AM2.11m | 7:09PM2.03m | 6:27AM2.18m | 7:37PM2.08m | 7:08AM2.22m | 8:05PM2.11m | 7:48AM2.22m | 8:32PM2.12m | 8:27AM2.17m | 8:59PM2.11m | ||||||||
Low Tide | 11:08AM0.43m | 11:20PM1.24m | 11:53AM0.33m | 00:03AM1.12m | 12:32PM0.26m | 00:41AM0.99m | 1:07PM0.25m | 1:17AM0.87m | 1:41PM0.28m | 1:51AM0.76m | 2:13PM0.35m | 2:26AM0.69m | 2:45PM0.47m | ||||||||
5:58 | — | — | 5:58 | — | — | 5:58 | — | — | 5:58 | — | — | 6:00 | — | — | 6:00 | — | — | 6:01 | — | — | |
— | 7:08 | — | — | 7:08 | — | — | 7:07 | — | — | 7:07 | — | — | 7:06 | — | — | 7:05 | — | — | 7:05 | — | |
mm | — | — | 2 | 2 | — | 4 | 3 | 1 | 2 | 2 | 1 | 2 | — | — | — | — | — | — | 2 | 2 | 17 |
Temp °C | 30 | 30 | 28 | 29 | 29 | 27 | 27 | 26 | 26 | 28 | 29 | 27 | 29 | 30 | 28 | 30 | 29 | 27 | 29 | 30 | 27 |
Feels °C | 32 | 32 | 31 | 33 | 33 | 31 | 30 | 29 | 30 | 33 | 33 | 31 | 34 | 35 | 33 | 34 | 32 | 31 | 32 | 34 | 31 |
Swell 1 Height (m) Direction Period (s) | S 11 | S 11 | S 10 | S 10 | S 10 | S 9 | SSW 9 | SSW 9 | SSW 8 | SSW 8 | S 8 | S 9 | SSW 8 | SW 8 | S 9 | SSW 8 | SSW 9 | SSW 9 | SSW 8 | SSW 9 | SSW 9 |
736 | 573 | 533 | 426 | 499 | 288 | 300 | 222 | 217 | 176 | 109 | 117 | 90 | 70 | 99 | 160 | 168 | 208 | 194 | 154 | 199 | |
Swell 2 Height (m) Direction Period (s) | SW 11 | SW 10 | SW 10 | E 12 | E 12 | SW 10 | E 11 | E 11 | E 10 | E 10 | E 10 | SW 9 | S 8 | S 9 | SW 8 | E 11 | E 11 | E 10 | E 10 | E 10 | E 10 |
593 | 486 | 256 | 181 | 136 | 110 | 84 | 83 | 51 | 50 | 75 | 64 | 66 | 78 | 54 | 61 | 61 | 77 | 77 | 53 | 51 | |
Swell 3 Height (m) Direction Period (s) | E 14 | E 13 | E 12 | SW 10 | E 6 | E 12 | E 6 | E 6 | ENE 13 | N 8 | SW 8 | E 10 | E 10 | E 10 | E 9 | ESE 5 | S 8 | W 7 | ESE 4 | S 7 | W 6 |
526 | 280 | 248 | 122 | 26 | 134 | 16 | 10 | 32 | 18 | 39 | 53 | 31 | 30 | 15 | 4 | 5 | 3 | 4 | 27 | 7 | |
Wind waves Height (m) Direction Period (s) | SSE 10 | E 7 | E 7 | — | — | — | — | — | E 5 | — | — | — | — | — | — | — | ESE 5 | ESE 4 | — | — | — |
627 | 51 | 43 | — | — | — | — | — | 8 | — | — | — | — | — | — | — | 4 | 4 | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 10 | 10 | 10 | 10 | 10 | 10 | 0 | 0 | 10 | 0 | 0 | 13 | 13 | 13 | 13 | 10 | 10 | 10 | 10 | 10 | 13 |
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.











