Surf Forecasts:
Yonabaru surf forecast from 25 Aug 2026:
- Best quality surf: Tuesday 1 Sep, 3PM (local time) - 7.5ft (2.3m), 13s period, ESE swell with offshore winds.
- Most powerful swell: Tuesday 25 Aug, 9PM (local time) - 10ft (3.0m), 13s period, E swell with 3,172 kJ wave energy.
- Next surfable swell (1★+): Tuesday 1 Sep, 9AM (local time) - 6ft (1.9m), 13s period with ESE 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 Tuesday (Sep 01) at 9AM. The primary swell is predicted to be 1.9m and 13s period with a secondary swell of 1.1m and 5s. 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 3.0m 13s and forecast to arrive on Tuesday (Aug 25) at 9PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 3.5m 7s period and expected on Wednesday (Aug 26) at 3AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9AM (Tue 1st Sep) | 6ft (1.9m) 13s |
| Best Surf | 3PM (Tue 1st Sep) | 7.5ft (2.3m) 13s |
| Most Powerful | 9PM (Tue 25th Aug) | 10ft (3.0m) 13s |
Table - best surf conditions forecast for Yonabaru over the next 16 days.
The Lowdown
G’day, Rusty here, checking in from Okinawa. We got a bit of a tale to tell over the next couple of weeks. The first few days are a write-off – messy onshore winds, lumpy seas, and tiny or messy surf. Nothing to get excited about at all until we get into September.
But hold onto your boardies, because from Tuesday the 1st of September things go from flat to firing. We get a big pulse of long-period groundswell pushing in from the east-southeast, and the wind turns light or offshore. That’s the standout window. Yonabaru, a fairly exposed beginner-friendly spot, copes with a 6ft easterly swell on the Tuesday morning. The water temp is sitting right on normal for the time of year at 84°F, so you’re in for a warm one. At 13 seconds, this is a proper groundswell with plenty of energy (combined energy at 1242 – moderate-to-strong), but at a beach break like Yonabaru, a long period can make it a bit straight. Still, with a gentle cross-off breeze, the waves will be clean and shapely.
Tuesday afternoon gets even better – a 8ft swell from the same direction, now with a glassy offshore wind, making for excellent, clean conditions. This is the pick of the whole outlook for experienced surfers. It’s not huge but the quality is there.
Wednesday the 2nd sees the swell jump up further – 12ft in the morning and a whopping 20ft in the afternoon. That’s big, powerful stuff (energy readings of 5002 and 15389 – very strong). The offshore wind keeps it clean, but this is expert-only territory. Too big for beginners and most intermediates. The waves will be thick and demanding.
After that, the swell drops back but stays messy through the next weekend. By Monday the 7th, we’re into 5ft to 5ft easterly swells again, with light winds and clean conditions, but the waves are a bit ordinary and the tide can be tricky. Still surfable if you’re keen.
Then Tuesday the 8th offers a final little highlight – glassy conditions with a 5ft east swell at 11 seconds. The calm sea is a treat, and the waves will be clean and playful. Not a standout like the 1st, but a nice way to finish the window.
After that, Wednesday the 9th looks like it’ll drop off into onshore junk again. So, the best advice: mark your calendar for September 1st and 2nd at Yonabaru – that’s where the magic is.
Rusty.
Short Range ForecastHeavy rain (total 23mm), heaviest during Tue afternoon. Warm (max 30°C on Thu morning, min 27°C on Tue afternoon). Winds decreasing (near gales from the W on Tue night, moderate winds from the S by Wed night). | Days 5-7 Weather SummaryLight rain (total 5mm), mostly falling on Fri afternoon. Warm (max 29°C on Fri afternoon, min 27°C on Fri night). Mainly fresh winds. | |||||||||||||||||||
Tue 25 | Wednesday 26 | Thursday 27 | Friday 28 | Saturday 29 | Sunday 30 | Monday 31 | ||||||||||||||
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 16 | NW 7 | NW 10 | ESE 9 | E 13 | SSE 5 | E 13 | SE 5 | SE 6 | E 12 | SE 7 | ESE 6 | ESE 6 | E 12 | E 12 | E 12 | ESE 7 | ESE 9 | ESE 9 | ESE 11 |
Wave Graph  | ||||||||||||||||||||
 kJ | 10024 | 743 | 832 | 86 | 55 | 75 | 51 | 111 | 231 | 25 | 173 | 71 | 53 | 74 | 44 | 44 | 47 | 138 | 157 | 485 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | off | cross-off | cross-off | cross | cross | cross | cross-on | cross-on | cross-on | cross-on | on | on | on | on | cross-on | cross-on | cross-on | cross-on | cross-on |
High Tide | 6:10PM1.92m | 5:17AM2.04m | 6:38PM2.01m | 6:03AM2.14m | 7:05PM2.07m | 6:44AM2.21m | 7:32PM2.12m | 7:23AM2.23m | 7:57PM2.14m | 8:01AM2.21m | 8:23PM2.15m | 8:39AM2.14m | 8:50PM2.13m | |||||||
Low Tide | 11:37PM1.12m | 12:03PM0.34m | 00:15AM0.96m | 12:39PM0.31m | 00:49AM0.82m | 1:12PM0.32m | 1:22AM0.69m | 1:44PM0.38m | 1:56AM0.60m | 2:14PM0.48m | 2:31AM0.54m | 2:44PM0.61m | ||||||||
 |  |  | |  |  | |  |  | |  | | | | | | | | |  | |
 | — | — | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — |
 | 6:55 | — | — | 6:54 | — | — | 6:53 | — | — | 6:52 | — | — | 6:52 | — | — | 6:51 | — | — | 6:50 | — |
mm | 6 | 7 | 4 | 2 | — | — | 2 | 2 | — | 1 | — | — | — | — | — | — | 2 | 2 | 3 | 11 |
Temp °C | 28 | 28 | 28 | 28 | 28 | 30 | 29 | 28 | 29 | 29 | 28 | 29 | 29 | 28 | 29 | 29 | 27 | 28 | 28 | 27 |
Feels °C | 27 | 24 | 26 | 28 | 29 | 32 | 31 | 30 | 30 | 31 | 30 | 31 | 31 | 30 | 29 | 29 | 27 | 28 | 29 | 28 |
Swell 1 Height (m) Direction Period (s) | E 16 | NNE 9 | NW 10 | WNW 9 | WNW 10 | WSW 9 | W 11 | W 11 | W 10 | W 10 | SSW 9 | SSW 9 | SSW 9 | SSW 9 | SSW 9 | SSW 8 | ESE 7 | ESE 9 | ESE 9 | ESE 11 |
| kJ | 10024 | 348 | 832 | 614 | 710 | 778 | 872 | 607 | 313 | 171 | 320 | 377 | 232 | 161 | 144 | 134 | 47 | 138 | 157 | 485 |
Swell 2 Height (m) Direction Period (s) | SW 9 | ESE 12 | ESE 10 | ESE 9 | E 8 | E 7 | ESE 8 | SW 10 | SSW 9 | SW 9 | W 9 | E 13 | E 13 | E 12 | E 12 | ESE 6 | S 8 | S 9 | S 8 | S 8 |
| kJ | 27 | 598 | 136 | 86 | 33 | 27 | 40 | 150 | 190 | 123 | 44 | 55 | 53 | 74 | 44 | 37 | 49 | 56 | 37 | 34 |
Swell 3 Height (m) Direction Period (s) | — | ENE 12 | E 15 | E 14 | E 13 | E 13 | E 13 | E 12 | E 12 | E 12 | E 11 | W 8 | W 8 | SE 8 | SSE 6 | E 12 | SW 9 | SW 10 | SW 10 | SW 10 |
| kJ | — | 477 | 17 | 35 | 55 | 53 | 51 | 26 | 25 | 25 | 22 | 22 | 10 | 17 | 4 | 44 | 54 | 33 | 32 | 35 |
Wind waves Height (m) Direction Period (s) | N 6 | NW 7 | SW 8 | SW 7 | SSW 6 | SSE 5 | SSW 7 | SE 5 | SE 6 | SSE 7 | SE 7 | ESE 6 | ESE 6 | SE 6 | ESE 6 | — | — | — | — | — |
| kJ | 333 | 743 | 803 | 373 | 245 | 75 | 277 | 111 | 231 | 471 | 173 | 71 | 52 | 64 | 28 | — | — | — | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 607 | 607 | 607 | 599 | 607 | 616 | 616 | 616 | 599 | 607 | 13 | 10 | 13 | 13 | 16 | 1013 | 680 | 760 | 792 | 607 |
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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