
Surf Forecasts:
Yonabaru surf forecast from 7 Sep 2026:
- Most powerful swell: Saturday 12 Sep, 3PM (local time) - 6ft (1.8m), 10s period, SE swell with 577 kJ wave energy.
Best Forecast Surf Conditions for Yonabaru this week:
The most powerful waves expected at Yonabaru in the next 16 days are 1.8m 10s and forecast to arrive on Saturday (Sep 12) 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 1.5m 9s period and expected on Saturday (Sep 12) at 6PM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 3PM (Sat 12th Sep) | 6ft (1.8m) 10s |
Table - best surf conditions forecast for Yonabaru over the next 16 days.
The Lowdown
Alright, Rusty here. Let’s break down what’s on offer at Yonabaru for the next couple of weeks. Honestly, it’s a pretty flat and windy run for the most part, but there’s a whisper of something clean right at the tail end.
Water’s sitting at about 84°, which is standard for the time of year – nothing weird going on.
From Monday the 7th of September, we’ve got a long stretch of nothing good. The wind is blowing hard from the north and east, mostly side-shore or onshore, and the swell is short-period and junky. The wave energy is moderate, like 543 (moderate) on Monday morning, but the surf quality is poor. Too much wind, too much chop. It’s not worth a look until mid-month.
Wednesday the 16th of September shows a slight improvement. The swell drops right down, but the wind goes light out of the south, becoming side-shore. The surf is small – about 4ft from the ESE – but the water goes glassy with just tiny wind ripples. The energy is weak (245). It’s a longboard or foiler wave at best. Just an ordinary, small day.
Then another dry spell until Sunday the 20th of September. That morning, the wind goes completely glassy out of the SSE. The swell is tiny – 2ft from the east – but it’s clean. The energy is very weak (84). This is your best chance: a glassy, tiny wave for a beginner or someone just wanting to float around. The afternoon stays glassy with a 2ft from the north, but still very small.
After that, it’s back to flat and windy through to Tuesday.
For the whole 16 days, there’s no standout. Yonabaru is a beginner-friendly spot that’s fairly consistent and likes northeast swell. None of that matches up here. The winds are mostly wrong, the swell directions are all over the place (NNW, ESE, E, SE), and the size is either too small or too bumpy. For the kite surfers, those strong onshore days with 5ft of messy swell might actually be more fun than anything for a paddle surfer.
The best of a bad bunch is definitely the glassy, tiny surf on Sunday the 20th. It’s clean, but it’s not a wave you’d travel for. It’s a “check it if you’re hanging out” kind of morning.
Rusty out.
Short Range ForecastSome drizzle, heaviest during Mon morning. Warm (max 29°C on Mon afternoon, min 26°C on Tue night). Mainly fresh winds. | Days 4-6 Weather SummaryModerate rain (total 10mm), heaviest on Thu afternoon. Warm (max 28°C on Thu morning, min 27°C on Thu morning). Wind will be generally light. | ||||||||||||||||||||
Monday 7 | Tuesday 8 | Wednesday 9 | Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | |||||||||||||||
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) | NNW 9 | NNW 8 | N 9 | NNW 8 | NNW 9 | N 8 | N 7 | N 7 | N 7 | NNW 9 | N 9 | N 9 | N 8 | ESE 6 | ESE 7 | ESE 7 | SE 10 | E 6 | E 6 | ESE 7 | ESE 7 |
Wave Graph | |||||||||||||||||||||
505 | 324 | 184 | 338 | 366 | 221 | 206 | 147 | 66 | 129 | 189 | 153 | 92 | 85 | 173 | 224 | 577 | 125 | 162 | 175 | 192 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-off | cross-off | cross | cross-off | cross | cross | cross | cross-on | cross-on | on | cross-on | cross-on | cross-on | on | on | on | on | on | on | on |
High Tide | 5:04PM1.76m | 3:47AM1.83m | 5:37PM1.87m | 4:48AM1.96m | 6:06PM1.97m | 5:36AM2.07m | 6:32PM2.04m | 6:18AM2.16m | 6:58PM2.10m | 6:58AM2.21m | 7:23PM2.14m | 7:35AM2.21m | 7:49PM2.16m | ||||||||
Low Tide | 9:52AM0.61m | 10:21PM1.28m | 10:47AM0.51m | 11:09PM1.12m | 11:31AM0.43m | 11:47PM0.94m | 12:08PM0.38m | 00:21AM0.77m | 12:42PM0.38m | 00:54AM0.63m | 1:14PM0.43m | 1:27AM0.51m | 1:44PM0.51m | 2:00AM0.44m | |||||||
6:09 | — | — | 6:11 | — | — | 6:11 | — | — | 6:11 | — | — | 6:11 | — | — | 6:11 | — | — | 6:13 | — | — | |
— | 6:43 | — | — | 6:42 | — | — | 6:40 | — | — | 6:38 | — | — | 6:37 | — | — | 6:37 | — | — | 6:36 | — | |
mm | 1 | — | — | — | — | — | — | — | — | 1 | 5 | 1 | 2 | 1 | — | — | — | — | — | — | — |
Temp °C | 28 | 29 | 27 | 28 | 28 | 27 | 27 | 27 | 27 | 28 | 28 | 27 | 28 | 28 | 27 | 28 | 28 | 27 | 28 | 28 | 27 |
Feels °C | 29 | 30 | 29 | 29 | 28 | 28 | 27 | 27 | 29 | 31 | 32 | 31 | 31 | 31 | 30 | 30 | 30 | 28 | 28 | 29 | 28 |
Swell 1 Height (m) Direction Period (s) | S 9 | E 8 | WNW 6 | SW 8 | S 8 | S 8 | S 8 | S 7 | N 7 | NNW 9 | N 9 | N 9 | N 8 | N 8 | N 8 | N 7 | NNW 7 | SSE 9 | SSE 9 | S 9 | S 8 |
38 | 21 | 54 | 15 | 20 | 10 | 10 | 10 | 66 | 129 | 189 | 153 | 92 | 68 | 30 | 28 | 17 | 222 | 126 | 73 | 46 | |
Swell 2 Height (m) Direction Period (s) | E 8 | S 9 | NE 10 | SSE 8 | ENE 8 | ENE 8 | ENE 9 | SE 10 | S 7 | ESE 9 | E 8 | ESE 9 | ESE 8 | E 15 | E 15 | S 10 | E 14 | E 14 | N 6 | E 14 | E 13 |
35 | 25 | 24 | 14 | 14 | 14 | 15 | 16 | 9 | 28 | 12 | 31 | 28 | 39 | 38 | 55 | 64 | 62 | 7 | 62 | 56 | |
Swell 3 Height (m) Direction Period (s) | E 13 | SW 8 | E 9 | NE 9 | E 9 | SE 10 | SE 10 | E 9 | SE 10 | S 7 | SE 9 | S 7 | E 15 | S 7 | WNW 6 | E 14 | SW 8 | N 7 | — | N 6 | N 6 |
3 | 17 | 14 | 22 | 14 | 16 | 16 | 6 | 15 | 8 | 13 | 8 | 39 | 4 | 3 | 61 | 2 | 15 | — | 7 | 3 | |
Wind waves Height (m) Direction Period (s) | NNW 9 | NNW 8 | N 9 | NNW 8 | NNW 9 | N 8 | N 7 | N 7 | ENE 4 | ENE 4 | ENE 4 | ENE 3 | ESE 4 | ESE 6 | ESE 7 | ESE 7 | SE 10 | E 6 | E 6 | ESE 7 | ESE 7 |
505 | 324 | 184 | 338 | 366 | 221 | 206 | 147 | 2 | 2 | 2 | 1 | 20 | 85 | 173 | 224 | 577 | 125 | 162 | 175 | 192 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 670 | 785 | 13 | 670 | 670 | 607 | 672 | 781 | 670 | 14 | 10 | 10 | 10 | 10 | 26 | 13 | 14 | 14 | 16 | 14 | 618 |
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.










