Surf Forecasts:
Yonabaru surf forecast from 26 Aug 2026:
- Best quality surf: Tuesday 1 Sep, 12AM (local time) - 11ft (3.5m), 10s period, E swell with cross-shore winds.
- Most powerful swell: Thursday 3 Sep, 3AM (local time) - 21ft (6.5m), 11s period, SE swell with 9,742 kJ wave energy.
- Next surfable swell (1★+): Tuesday 1 Sep, 12AM (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 12AM. The primary swell is predicted to be 3.5m and 10s period. The wind is predicted to be cross-shore as the swell arrives.
The most powerful waves expected at Yonabaru in the next 16 days are 6.5m 11s and forecast to arrive on Thursday (Sep 03) at 3AM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 8.0m 12s period and expected on Thursday (Sep 03) at 6AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12AM (Tue 1st Sep) | 11ft (3.5m) 10s |
| Best Surf | 12AM (Tue 1st Sep) | 11ft (3.5m) 10s |
| Most Powerful | 3AM (Thu 3rd Sep) | 21ft (6.5m) 11s |
Table - best surf conditions forecast for Yonabaru over the next 16 days.
The Lowdown
Alright, let’s have a look at what’s on the cards for the Yonabaru area.
To be straight with you, the next week and a half is pretty grim. We’ve got a run of onshore winds and poor conditions from Thursday the 27th right through to Monday the 31st of August. The swell is all over the place, mostly short-period wind chop, and the combined energy is weak to moderate at best – nowhere near worth paddling out for. You’re looking at a solid 5 or 6 days of nothing to get excited about.
Things start to shift around Tuesday the 1st of September. That morning, we get a strong cross-offshore breeze from the NW with a 10ft swell from the ESE, but the period is only 9 seconds, so it’s a bit of a lumpy mess, and the energy is high (1568) but the quality is still marginal. The water temperature is sitting at 84°F, which is about normal for this time of year, so no surprises there.
Wednesday the 2nd of September morning sees offshore winds from the west, which is a big positive. Swell is 6ft from the ESE, still short period at 8 seconds, but the clean conditions make it worth a look for a more experienced surfer. The combined energy is moderate (416). That afternoon the swell jumps to 8ft, still offshore, but again, the period is short, so it’s going to be a bit crumbly. It’s a step in the right direction.
Thursday the 3rd of September cleans up nicely with moderate offshore winds from the WNW. Swell drops to 5ft from the ESE, period 9 seconds, and the energy is moderate (432). It’s a decent morning for a longboard or a funboard, but nothing to write home about. The afternoon gets smaller and weaker.
Now, the real standout comes on Saturday the 5th of September. That morning, we’ve got glassy conditions with a light easterly breeze, basically no wind. Swell is 6ft from the NNW with a long period of 12 seconds – that’s proper groundswell, and it’s going to wrap in nicely. The combined energy is strong (914). This is the best on offer, no question. Early morning at Yonabaru with that clean, lined-up swell will be magic. The afternoon stays glassy with a 5ft swell from the north, same long period. If you can only pick one session, make it this Saturday.
After that, it’s back to onshore winds and poor conditions from Sunday the 6th right through to Tuesday the 8th of September – that’s a solid 3-day gap. On Tuesday the 8th, we get a huge 16ft swell from the SE with a 12-second period in the afternoon, but the wind is howling onshore, and the energy is extreme (6841). That’s a mess for surfing, but if you’ve got a kite, that’s where the fun is.
There’s a bit of a tease on Thursday the 10th of September morning with a 10ft swell from the NW, 11-second period, and moderate cross-onshore wind. The energy is strong (2308), but the wind is not your friend. It’s marginal at best.
So, to wrap it up: the next few days are a write-off. The one true standout is Saturday the 5th of September – glassy, long-period swell, and clean. That’s your window. Everything else is either blown out, too short period, or just plain messy.
Rusty.
Short Range ForecastLight rain (total 5mm), mostly falling on Thu morning. Warm (max 29°C on Thu morning, min 27°C on Thu night). Wind will be generally light. | Days 4-6 Weather SummaryModerate rain (total 18mm), heaviest on Mon afternoon. Warm (max 29°C on Sun morning, min 27°C on Sun night). Winds increasing (moderate winds from the NE on Sun night, strong winds from the NW by Tue afternoon). | ||||||||||||||||||||
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 13 | SE 7 | SE 6 | SE 6 | SE 6 | SE 7 | SE 7 | ESE 7 | ESE 8 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | E 10 | ESE 9 | E 8 | E 8 | ESE 8 | ESE 8 | E 10 |
Wave Graph | |||||||||||||||||||||
53 | 51 | 137 | 206 | 172 | 188 | 192 | 168 | 123 | 128 | 365 | 749 | 792 | 970 | 2053 | 1568 | 541 | 746 | 416 | 804 | 4849 | |
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 | on | cross-on | cross-on | cross-on | cross | cross | cross-off | cross-off | off | off | off | 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 | 1 | 2 | 2 | — | — | — | — | — | — | — | — | 1 | 2 | 4 | 4 | 2 | 1 | 4 | 4 | 1 | — |
Temp °C | 29 | 29 | 28 | 29 | 29 | 28 | 29 | 29 | 27 | 29 | 29 | 27 | 28 | 28 | 27 | 28 | 28 | 28 | 28 | 28 | 27 |
Feels °C | 32 | 31 | 31 | 31 | 31 | 29 | 31 | 31 | 29 | 30 | 30 | 28 | 28 | 29 | 28 | 27 | 26 | 27 | 29 | 28 | 27 |
Swell 1 Height (m) Direction Period (s) | W 10 | W 10 | W 10 | W 10 | W 10 | SW 9 | SSW 9 | SSW 8 | ESE 7 | SSW 9 | S 9 | ESE 10 | ESE 10 | ESE 10 | SW 10 | SW 10 | SSE 9 | S 10 | S 10 | S 12 | SSE 12 |
725 | 774 | 506 | 244 | 118 | 83 | 101 | 92 | 123 | 108 | 56 | 749 | 792 | 970 | 25 | 16 | 782 | 414 | 738 | 1901 | 5090 | |
Swell 2 Height (m) Direction Period (s) | E 7 | E 7 | SW 9 | SW 9 | SW 8 | W 10 | W 8 | E 13 | SSW 9 | E 12 | SW 8 | SSW 8 | S 10 | SSW 9 | SSW 8 | SSW 11 | N 6 | SSW 10 | SW 10 | SW 10 | — |
28 | 26 | 95 | 110 | 86 | 66 | 20 | 53 | 124 | 44 | 34 | 82 | 49 | 27 | 7 | 11 | 6 | 10 | 16 | 26 | — | |
Swell 3 Height (m) Direction Period (s) | E 13 | E 13 | E 12 | E 12 | S 8 | S 7 | E 13 | S 8 | E 12 | S 8 | ENE 12 | E 11 | SW 9 | SW 10 | S 9 | — | SW 10 | WSW 10 | — | — | — |
53 | 51 | 25 | 25 | 10 | 17 | 55 | 18 | 47 | 5 | 27 | 39 | 22 | 24 | 7 | — | 16 | 10 | — | — | — | |
Wind waves Height (m) Direction Period (s) | SSW 8 | S 8 | SE 7 | SE 6 | SE 6 | SE 6 | SE 7 | SE 7 | — | ESE 8 | ESE 10 | — | NE 6 | NE 6 | E 10 | ESE 9 | E 8 | E 8 | ESE 8 | ESE 8 | E 10 |
249 | 239 | 137 | 206 | 172 | 188 | 192 | 168 | — | 128 | 365 | — | 160 | 212 | 2053 | 1568 | 541 | 746 | 416 | 804 | 4849 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 599 | 616 | 10 | 599 | 13 | 607 | 10 | 13 | 13 | 16 | 16 | 670 | 670 | 607 | 607 | 1278 | 81 | 727 | 765 | 800 | 599 |
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.











