Surf Forecasts:
Yonabaru surf forecast from 20 Aug 2026:
- Best quality surf: Wednesday 26 Aug, 12AM (local time) - 7ft (2.2m), 14s period, E swell with cross-offshore winds.
- Most powerful swell: Monday 24 Aug, 3PM (local time) - 11ft (3.5m), 18s period, ESE swell with 8,095 kJ wave energy.
- Next surfable swell (1★+): Wednesday 26 Aug, 12AM (local time) - 7ft (2.2m), 14s 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 26) at 12AM. The primary swell is predicted to be 2.2m and 14s period with a secondary swell of 0.9m and 6s. 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 3.5m 18s and forecast to arrive on Monday (Aug 24) at 3PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 4.5m 10s period and expected on Saturday (Aug 22) at 12AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12AM (Wed 26th Aug) | 7ft (2.2m) 14s |
| Best Surf | 12AM (Wed 26th Aug) | 7ft (2.2m) 14s |
| Most Powerful | 3PM (Mon 24th Aug) | 11ft (3.5m) 18s |
Table - best surf conditions forecast for Yonabaru over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s have a look at what’s cookin’ for Yonabaru over the next couple of weeks.
To be straight with you, this is a tough outlook. We’ve got a long, nasty run of weather and wind to start, with thundery conditions practically every day. For the first week, the surf is blown out, messy, or just plain dangerous, especially when that swell ramps up. There’s a big window from Thursday afternoon right through to Tuesday morning where I wouldn't even paddle out. It’s just poor.
The first real chance for a surf comes much later, but we do get a couple of windows worth knowing about.
The real standout in this 16-day window, and the only time I’d really get keen, is Tuesday, 25 August. The morning is the pick. A solid 10ft swell from the ESE (16 second period) will be rolling in. That’s a groundswell with serious energy (4,513 combined energy). The wind is light and *onshore* from the E at just 9 mph, which keeps it from being too choppy. That’s a lot of water moving, so this one is for experienced surfers only. The early session will have some good shape, but come afternoon the wind picks up and the quality drops.
Another morning to have a look is Wednesday, 26 August. We get a smaller, cleaner swell at 6ft from the E (13 second period). The wind is light from the NE at 6 mph, just a little cross-onshore (1013 combined energy). Not a classic, but it’ll be rideable and more manageable for intermediate paddlers. The water temp is sitting at about 83°F, which is normal for the time of year.
After that, the outlook turns real quiet again. We're into the first days of September with only knee-high slop or clean but tiny waves. Even the clean cross-off winds from the NNW bring swells under 3ft—not enough to get excited about.
Honestly, for the next two weeks, keep your eyes on the morning of Tuesday 25 August for that bigger groundswell, and maybe the 26th for something smaller but cleaner. Everything else is either flat, blown out, or both.
Keep paddlin’.
Rusty.
Short Range ForecastHeavy rain (total 30mm), heaviest during Fri morning. Warm (max 28°C on Thu afternoon, min 26°C on Fri morning). Winds increasing (light winds from the ESE on Thu night, strong winds from the SE by Fri afternoon). | Days 5-7 Weather SummaryModerate rain (total 18mm), heaviest on Mon morning. Warm (max 29°C on Tue morning, min 26°C on Tue night). Winds decreasing (fresh winds from the ESE on Sun afternoon, light winds from the SW by Tue night). | |||||||||||||||||||
Thu 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | ||||||||||||||
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 7 | ESE 7 | ESE 6 | SE 8 | NE 9 | SSE 10 | SSE 9 | E 13 | ESE 7 | ESE 17 | SE 8 | SE 9 | ESE 18 | ESE 17 | ESE 16 | E 15 | E 14 | E 13 | ENE 13 | ENE 12 |
Wave Graph  | ||||||||||||||||||||
 kJ | 162 | 111 | 101 | 1871 | 3 | 0 | 0 | 14 | 278 | 115 | 1482 | 1858 | 8095 | 4013 | 4513 | 3287 | 1759 | 971 | 679 | 140 |
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-on | cross-on | cross-on | cross-on | on | on | cross-on | on | on | on | on | on | cross-off | cross-on | cross | cross-off |
High Tide | 11:12PM1.91m | 1:25PM1.53m | 00:10AM1.84m | 3:38PM1.57m | 1:38AM1.79m | 4:55PM1.69m | 3:12AM1.83m | 5:37PM1.81m | 4:23AM1.93m | 6:10PM1.92m | 5:17AM2.04m | 6:38PM2.01m | ||||||||
Low Tide | 4:58PM1.15m | 6:30AM0.74m | 5:55PM1.32m | 8:02AM0.73m | 7:49PM1.42m | 9:29AM0.65m | 9:46PM1.39m | 10:33AM0.53m | 10:52PM1.26m | 11:22AM0.42m | 11:37PM1.12m | 12:03PM0.34m | 00:15AM0.96m | |||||||
 |  | | | | | | | | | | | | | | |  |  |  | | |
 | — | — | 6:03 | — | — | 6:03 | — | — | 6:03 | — | — | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — |
 | 7:00 | — | — | 7:00 | — | — | 6:59 | — | — | 6:58 | — | — | 6:57 | — | — | 6:55 | — | — | 6:54 | — |
mm | 4 | 4 | 4 | 2 | 5 | 3 | 3 | 3 | 2 | 2 | 3 | 3 | 3 | 4 | 1 | 2 | — | — | — | — |
Temp °C | 28 | 27 | 27 | 27 | 27 | 28 | 27 | 27 | 28 | 28 | 27 | 27 | 27 | 27 | 29 | 29 | 26 | 29 | 29 | 27 |
Feels °C | 30 | 30 | 27 | 24 | 25 | 26 | 25 | 27 | 28 | 28 | 27 | 27 | 27 | 28 | 32 | 32 | 30 | 32 | 32 | 31 |
Swell 1 Height (m) Direction Period (s) | S 9 | S 9 | S 8 | SW 8 | SW 10 | SW 9 | SW 10 | E 13 | S 10 | ESE 17 | SSW 11 | SSW 10 | SSW 10 | ESE 17 | ESE 16 | E 15 | E 14 | E 13 | ENE 13 | SSW 10 |
| kJ | 189 | 225 | 165 | 102 | 231 | 84 | 115 | 14 | 1258 | 115 | 24 | 86 | 86 | 4013 | 4513 | 3287 | 1759 | 971 | 679 | 322 |
Swell 2 Height (m) Direction Period (s) | SW 9 | ENE 7 | SW 8 | — | NE 9 | — | — | E 16 | ESE 14 | ESE 13 | ENE 13 | — | — | SSW 10 | S 9 | S 10 | SSW 10 | SSW 10 | SSW 10 | ENE 12 |
| kJ | 12 | 79 | 54 | — | 3 | — | — | 5 | 40 | 60 | 17 | — | — | 205 | 262 | 319 | 288 | 342 | 335 | 140 |
Swell 3 Height (m) Direction Period (s) | ENE 8 | SW 9 | ENE 8 | — | — | — | — | E 16 | SE 18 | ESE 13 | — | — | — | ENE 10 | — | SE 10 | SE 10 | SE 10 | SSE 9 | NNW 6 |
| kJ | 28 | 21 | 20 | — | — | — | — | 5 | 13 | 17 | — | — | — | 52 | — | 4 | 16 | 17 | 9 | 33 |
Wind waves Height (m) Direction Period (s) | ESE 7 | ESE 7 | ESE 6 | SE 8 | SSE 10 | SSE 10 | SSE 9 | SSE 9 | ESE 7 | SSE 10 | SE 8 | SE 9 | ESE 18 | ESE 8 | — | NNE 5 | NNE 6 | N 6 | N 4 | — |
| kJ | 162 | 111 | 101 | 1871 | 3690 | 2715 | 1514 | 926 | 278 | 1906 | 1482 | 1858 | 8095 | 502 | — | 9 | 50 | 25 | 19 | — |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 13 | 10 | 599 | 599 | 599 | 599 | 607 | 599 | 670 | 820 | 670 | 760 | 792 | 13 | 16 | 13 | 0 | 13 | 13 | 0 |
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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