Surf Forecasts:
Yonabaru surf forecast from 27 Aug 2026:
- Best quality surf: Tuesday 1 Sep, 3AM (local time) - 11ft (3.5m), 10s period, E swell with cross-offshore winds.
- Most powerful swell: Tuesday 1 Sep, 3PM (local time) - 18ft (5.5m), 12s period, SE swell with 8,245 kJ wave energy.
- Next surfable swell (1★+): Tuesday 1 Sep, 3AM (local time) - 11ft (3.5m), 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 Tuesday (Sep 01) at 3AM. The primary swell is predicted to be 3.5m 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 5.5m 12s and forecast to arrive on Tuesday (Sep 01) at 3PM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 7.0m 12s period and expected on Thursday (Sep 03) at 3PM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3AM (Tue 1st Sep) | 11ft (3.5m) 10s |
| Best Surf | 3AM (Tue 1st Sep) | 11ft (3.5m) 10s |
| Most Powerful | 3PM (Tue 1st Sep) | 18ft (5.5m) 12s |
Table - best surf conditions forecast for Yonabaru over the next 16 days.
The Lowdown
Alright, Rusty here, and I've got the skinny on what's coming our way at Yonabaru. Let's be real, the next couple of weeks are a mixed bag, and we're gonna have to be patient. The water’s sitting at 84°, which is pretty much spot on for this time of year, so at least you won't be freezing your arse off while you wait.
We're in for a long, slow start. From Thursday the 27th of August all the way through to Monday the 31st of August, it’s a write-off. The wind is constantly onshore or cross-shore, and the swell is either tiny or just plain messy. You'll see a little bump in energy on the 30th and 31st with combined energy hitting 421 and then 896, but it's all cross-on, choppy, and tagged as "poor surf conditions." Don't bother paddling out.
Now, pay attention to Tuesday the 1st of September. This is the big one, but it's not for everyone. We’ve got a serious pulse of energy, with a combined energy reading of 3845 in the morning and a massive 8245 in the afternoon. The swell is coming from the E and SE, pushing 15 ft to 18 ft. That's a beast. The wind is offshore, swinging cross-offshore, making it clean, but this is strictly for the experts. If you're a beginner, stay on the beach. This is a big, powerful groundswell with a period of 10 to 12 seconds, so it's going to have some serious push. The forecast notes it's "too big for this break," so take that as a warning. It's a standout, but a dangerous one.
After that big event, things settle down a bit. Wednesday the 2nd of September morning looks like the best of the rest. The swell drops to a more manageable 8 ft from the ESE, with offshore winds from the WNW. This is the one I'd circle. The combined energy is a solid 737, and the conditions are clean. It's a good, solid option for a surf. The afternoon on the 2nd, and the days following, are all marginal. There's some waist-to-chest high swell moving through, but the wind stays clean, so it's a better bet than the first week.
The following weekend, the 5th and 6th of September, has some promise. Saturday the 5th afternoon sees a clean 4 ft from the N with a nice 11-second period. That's a long, clean groundswell that should wrap in nicely. The combined energy is 447. Sunday the 6th, the wind turns onshore again, so it's back to being messy.
From the 7th of September onwards, it's pretty much back to square one. Small, weak swells, and a lot of onshore wind. There's a bit of a north swell on the 9th, but it's cross-shore and choppy. The 10th and 11th are tiny, with combined energy dropping to 99 and then 43. It's a flat spell to finish the run.
So, to wrap it up: the first week is a total loss. The real standout is the morning of Wednesday the 2nd of September. That's your window for clean, head-high waves with offshore wind. The Tuesday the 1st of September swell is a monster for experts only. The Saturday the 5th of September afternoon is also a good call for a cleaner, smaller session.
Rusty.
Short Range ForecastLight rain (total 3mm), mostly falling on Thu afternoon. Warm (max 29°C on Thu morning, min 27°C on Thu night). Wind will be generally light. | Days 4-6 Weather SummaryHeavy rain (total 66mm), heaviest during Mon night. Warm (max 29°C on Sun morning, min 27°C on Sun night). Mainly fresh winds. | ||||||||||||||||||||
Thursday 27 | Friday 28 | Saturday 29 | Sunday 30 | Monday 31 | Tuesday 1 | Wednesday 2 | |||||||||||||||
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 13 | E 7 | SE 7 | SE 6 | SE 6 | ESE 6 | SE 7 | SE 7 | ESE 6 | ESE 7 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | E 10 | E 10 | SE 12 | ESE 8 | ESE 8 | E 9 | E 10 |
Wave Graph | |||||||||||||||||||||
53 | 25 | 121 | 184 | 157 | 253 | 309 | 262 | 145 | 139 | 378 | 461 | 720 | 772 | 1712 | 3845 | 8245 | 865 | 737 | 529 | 512 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross | cross-on | cross-on | cross-on | cross-on | cross-on | on | on | cross-on | cross-on | cross-on | cross-on | cross-on | cross | cross-off | off | cross-off | off | cross-off | cross-off |
High Tide | 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 | 9:20AM2.02m | 9:18PM2.09m | 10:05AM1.87m | 9:49PM2.03m | ||||||||
Low Tide | 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 | 3:07AM0.52m | 3:14PM0.77m | 3:47AM0.54m | 3:45PM0.94m | ||||||||
6:05 | — | — | 6:05 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | |
— | 6:53 | — | — | 6:52 | — | — | 6:52 | — | — | 6:51 | — | — | 6:50 | — | — | 6:49 | — | — | 6:47 | — | |
mm | — | 2 | 1 | — | — | — | — | — | — | — | — | 4 | 2 | 5 | 44 | 4 | 3 | 4 | 1 | 1 | — |
Temp °C | 29 | 28 | 28 | 29 | 29 | 28 | 29 | 29 | 27 | 29 | 29 | 27 | 29 | 27 | 27 | 28 | 28 | 28 | 28 | 28 | 27 |
Feels °C | 32 | 30 | 31 | 31 | 31 | 30 | 31 | 31 | 29 | 30 | 29 | 28 | 30 | 28 | 28 | 28 | 29 | 30 | 31 | 30 | 29 |
Swell 1 Height (m) Direction Period (s) | W 10 | W 10 | W 10 | W 10 | W 10 | SW 9 | SSW 9 | SW 8 | SSW 9 | S 8 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | SSW 10 | SSW 10 | SW 12 | S 10 | S 10 | SSW 10 | SW 12 |
725 | 609 | 476 | 244 | 118 | 81 | 106 | 74 | 111 | 68 | 378 | 461 | 720 | 772 | 31 | 33 | 92 | 876 | 640 | 1298 | 897 | |
Swell 2 Height (m) Direction Period (s) | E 7 | E 7 | SW 9 | SW 9 | SW 9 | W 10 | W 8 | E 13 | E 12 | SW 9 | SSW 8 | SSW 8 | S 9 | SSW 8 | SW 10 | SW 10 | — | NNE 7 | SW 10 | SW 11 | E 10 |
28 | 25 | 91 | 112 | 88 | 65 | 20 | 53 | 47 | 50 | 101 | 82 | 42 | 24 | 25 | 15 | — | 5 | 98 | 142 | 512 | |
Swell 3 Height (m) Direction Period (s) | E 13 | SE 8 | E 12 | E 12 | S 8 | S 8 | E 13 | W 7 | W 7 | E 12 | E 12 | E 11 | SW 9 | SW 9 | S 9 | — | — | E 14 | — | E 9 | NNW 8 |
53 | 24 | 25 | 25 | 18 | 10 | 55 | 10 | 4 | 44 | 43 | 23 | 31 | 22 | 6 | — | — | 4 | — | 529 | 13 | |
Wind waves Height (m) Direction Period (s) | SSW 8 | SSW 8 | SE 7 | SE 6 | SE 6 | ESE 6 | SE 7 | SE 7 | ESE 6 | ESE 7 | — | — | NE 5 | NE 6 | E 10 | E 10 | SE 12 | ESE 8 | ESE 8 | E 9 | S 11 |
215 | 217 | 121 | 184 | 157 | 253 | 309 | 262 | 145 | 139 | — | — | 106 | 124 | 1712 | 3845 | 8245 | 865 | 737 | 455 | 1548 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 599 | 599 | 10 | 10 | 820 | 607 | 10 | 13 | 13 | 16 | 670 | 670 | 670 | 607 | 607 | 820 | 792 | 607 | 0 | 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.











