Surf Forecasts:
Yonabaru surf forecast from 12 Sep 2026:
- Best quality surf: Tuesday 15 Sep, 12PM (local time) - 3.5ft (1.0m), 9s period, ESE swell with glassy winds.
- Most powerful swell: Saturday 19 Sep, 9PM (local time) - 3ft (0.9m), 16s period, ESE swell with 411 kJ wave energy.
- Next surfable swell (1★+): Tuesday 15 Sep, 12PM (local time) - 3.5ft (1.0m), 9s 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 15) at 12PM. The primary swell is predicted to be 1.0m and 9s period with a secondary swell of 0.4m and 12s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Yonabaru in the next 16 days are 0.9m 16s and forecast to arrive on Saturday (Sep 19) at 9PM. Winds are predicted to be cross-shore at the time the swell arrives.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12PM (Tue 15th Sep) | 3.5ft (1.0m) 9s |
| Best Surf | 12PM (Tue 15th Sep) | 3.5ft (1.0m) 9s |
| Most Powerful | 9PM (Sat 19th Sep) | 3ft (0.9m) 16s |
Table - best surf conditions forecast for Yonabaru over the next 16 days.
The Lowdown
G'day, Rusty here. Look, I’ll be straight with you – the next 16 days for Yonabaru are about as exciting as watching a tide chart dry. There’s almost nothing worth paddling out for. The whole period is littered with "poor surf conditions" flags. We’ve got a solid run of weak, onshore junk through the end of September and into early October.
We start on Saturday the 12th with a tiny 0.4m easterly windswell (about 1ft), period a sluggish 14 seconds, but it’s onshore and the energy is weak. That sets the theme. The combined energy barely cracks three digits for the first week – pathetic. The only real pulse of size shows up way down the line. On Saturday the 20th and Sunday the 21st, we see a jump: a 2–2.4m swell (8–8ft) from the east arrives, with a period around 14–15 seconds. That’s a proper long-period groundswell. The combined energy rockets to strong. But here’s the catch: the wind is howling out of the north at 40–45 km/h (25–28 mph), cross or cross-off. The Sunday afternoon window actually goes "clean" with that cross-off, but that north wind is howling. That swell is over 8ft, so it’s expert-only territory, and the long period means it’ll be fat and closing out at a beach break like Yonabaru. It might look interesting for kiting, but for a paddle surfer? Forget it.
Then from Monday the 21st into Tuesday the 22nd we get gale-force offshore winds out of the west and WSW at 50–65 km/h (31–40 mph). The swell drops back to 1.7m then 1.4m (6–5ft), but the wind is so strong it’s "extremely hard to paddle into." Tuesday morning eases to a 1.2m swell (4ft) from the north with fresh offshore wind and clean surface – that’s the only half-decent window, but the energy is weak and the period is a short 8 seconds. Not worth a special trip.
Bottom line: Yonabaru is a beginner-friendly, fairly consistent spot that normally gets a bit of easterly exposure, but this 16-day run is a dud. The water temp is a toasty 29°C (84°F), which is bang on average for this time of year. Crowds are "sometimes" an issue, but nobody will be out. The only faint glimmer is the Sunday the 20th expert-level swell if the wind swings, but don’t hold your breath. This is one to sit out.
Rusty.
Short Range ForecastHeavy rain (total 23mm), heaviest during Tue morning. Warm (max 29°C on Sat afternoon, min 27°C on Sat night). Wind will be generally light. | Days 5-7 Weather SummaryModerate rain (total 13mm), heaviest on Tue night. Warm (max 29°C on Tue afternoon, min 27°C on Tue night). Wind will be generally light. | |||||||||||||||||||
Sat 12 | Sunday 13 | Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | ||||||||||||||
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 14 | E 14 | E 7 | ESE 8 | ESE 8 | ESE 8 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | E 13 | E 9 | E 8 | E 8 |
Wave Graph  | ||||||||||||||||||||
 kJ | 64 | 62 | 61 | 107 | 151 | 176 | 154 | 193 | 166 | 177 | 189 | 147 | 144 | 141 | 108 | 110 | 84 | 125 | 92 | 78 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | on | cross-on | on | on | on | on | cross-on | cross-on | cross-on | on | on | cross-on | on | on | on | on | cross-on | cross-on | cross-on |
High Tide | 7:23PM2.14m | 7:35AM2.21m | 7:49PM2.16m | 8:13AM2.16m | 8:15PM2.15m | 8:52AM2.06m | 8:43PM2.13m | 9:34AM1.93m | 9:11PM2.07m | 10:23AM1.77m | 9:44PM1.99m | 11:28AM1.62m | 10:24PM1.88m | |||||||
Low Tide | 1:27AM0.51m | 1:44PM0.51m | 2:00AM0.44m | 2:14PM0.62m | 2:35AM0.41m | 2:43PM0.76m | 3:12AM0.42m | 3:13PM0.91m | 3:55AM0.48m | 3:45PM1.07m | 4:45AM0.57m | 4:23PM1.23m | ||||||||
 |  | |  |  |  | | | | |  | | | | | | |  | | | |
 | — | — | 6:13 | — | — | 6:13 | — | — | 6:13 | — | — | 6:13 | — | — | 6:15 | — | — | 6:15 | — | — |
 | 6:37 | — | — | 6:36 | — | — | 6:35 | — | — | 6:34 | — | — | 6:32 | — | — | 6:31 | — | — | 6:30 | — |
mm | — | — | — | 2 | 2 | — | — | 11 | 8 | — | 4 | 2 | — | 3 | 2 | — | — | 2 | 3 | — |
Temp °C | 29 | 27 | 28 | 28 | 27 | 29 | 29 | 28 | 28 | 29 | 28 | 29 | 29 | 27 | 28 | 28 | 27 | 28 | 29 | 27 |
Feels °C | 32 | 30 | 30 | 30 | 29 | 32 | 31 | 31 | 31 | 32 | 32 | 33 | 32 | 30 | 31 | 30 | 30 | 31 | 31 | 30 |
Swell 1 Height (m) Direction Period (s) | ESE 6 | NNW 6 | E 14 | E 14 | E 13 | ESE 8 | ESE 8 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | E 9 | E 12 | E 8 | E 8 |
| kJ | 29 | 13 | 61 | 62 | 56 | 176 | 154 | 193 | 166 | 177 | 189 | 147 | 144 | 141 | 108 | 110 | 54 | 47 | 92 | 78 |
Swell 2 Height (m) Direction Period (s) | N 7 | E 14 | ESE 9 | N 6 | N 6 | E 13 | E 13 | E 13 | E 12 | E 12 | NNW 5 | E 14 | NNW 6 | NNW 7 | NNW 6 | E 13 | E 13 | N 6 | E 12 | E 12 |
| kJ | 24 | 62 | 16 | 3 | 5 | 55 | 54 | 54 | 49 | 47 | 6 | 61 | 15 | 26 | 23 | 84 | 84 | 13 | 45 | 44 |
Swell 3 Height (m) Direction Period (s) | E 14 | S 7 | NNW 6 | S 6 | S 6 | N 5 | N 5 | — | — | NW 6 | E 15 | NNW 6 | E 14 | E 14 | E 14 | NNW 6 | NNW 6 | S 8 | N 7 | N 7 |
| kJ | 64 | 8 | 7 | 3 | 3 | 2 | 2 | — | — | 10 | 17 | 8 | 58 | 100 | 91 | 12 | 12 | 12 | 15 | 8 |
Wind waves Height (m) Direction Period (s) | — | E 5 | E 6 | E 7 | ESE 8 | — | — | — | — | — | ESE 2 | — | — | — | — | — | E 4 | E 9 | — | — |
| kJ | — | 29 | 49 | 107 | 151 | — | — | — | — | — | 1 | — | — | — | — | — | 10 | 125 | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 10 | 14 | 14 | 14 | 607 | 10 | 10 | 47 | 17 | 17 | 17 | 10 | 14 | 10 | 14 | 14 | 14 | 14 | 14 | 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.
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