
Surf Forecasts:
Yonabaru surf forecast from 6 Aug 2026:
- Best quality surf: Thursday 6 Aug, 6PM (local time) - 13ft (4.0m), 16s period, E swell with cross-offshore winds.
- Most powerful swell: Friday 7 Aug, 12PM (local time) - 21ft (6.5m), 11s period, NW swell with 9,606 kJ wave energy.
- Next surfable swell (1★+): Thursday 6 Aug, 6PM (local time) - 13ft (4.0m), 16s 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 Thursday (Aug 06) at 6PM. The primary swell is predicted to be 4.0m and 16s period with a secondary swell of 2.5m and 7s. 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 6.5m 11s and forecast to arrive on Friday (Aug 07) at 12PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 9.5m 14s period and expected on Saturday (Aug 08) at 9AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6PM (Thu 6th Aug) | 13ft (4.0m) 16s |
| Best Surf | 6PM (Thu 6th Aug) | 13ft (4.0m) 16s |
| Most Powerful | 12PM (Fri 7th Aug) | 21ft (6.5m) 11s |
Table - best surf conditions forecast for Yonabaru over the next 16 days.
The Lowdown
Alright, Rusty here. Let’s get into this one.
This 16-day outlook is a gritty one, I’m not gonna lie. The only break on the radar is Yonabaru, and it’s taking a beating from the weather for a solid week before things get a little quieter. There’s no hidden gem here.
Thursday morning, August 6th, kicks off with a big, angry 12-foot east swell with a long 16-second period – that’s a lot of energy (7311). The water’s a warm 87°, a touch warmer than usual. But the wind is howling from the north at 19 mph, cross-shore, and it’s lumpy. This is way too much size for a beginner spot, and the conditions are poor. The afternoon gets even worse with a 13-foot swell and a 25 mph cross-shore. Hopeless.
Friday, August 7th, is a disaster. The morning has a 12-foot ENE swell, but a 43 mph gale from the NW? The wind is clean, but at that speed, you can’t surf. The afternoon is a 8-foot swell with a 53 mph offshore gale. You’d be nuts to go out.
Saturday, August 8th, through to Wednesday, August 12th, is a total washout. Storm-force winds, severe gales, constant thunderstorm risks. The swell drops to under 3 feet, but the wind is destroying everything. The wave energy is pathetic (between 59 and 285), and every session is marked as poor. Don’t even think about it.
From Thursday, August 13th, the wind finally starts to back off, but the swell is tiny. We’re talking 2 to 2 feet of east swell, mostly with a short period of 6 to 12 seconds. The afternoon of Friday, August 14th, is the first clean window in a week – a 2-foot, 12-second east swell with a 12 mph cross-offshore wind from the NNW (141 energy). It’s clean, but it’s barely a ripple.
The best of a bad lot is Saturday, August 15th. Both the morning and afternoon have a light 6 mph north wind, just a light cross-shore with small ripples. The swell is a consistent 2 feet from the east at 11 seconds (114 energy). It’s tiny, but it’s glassy. For a beginner spot like Yonabaru, this is the only time the water will be flat and friendly. Still, no standout. Just a small, mushy day.
The second week, starting August 16th, the wind switches onshore from the east, and the swell tries to build a little, but it’s all choppy. The morning of August 19th has a 5-foot east swell (390 energy), but with onshore wind at 12 mph. The 20th of August brings a 6-foot east swell, but again, onshore and messy. The period is short (7-9 seconds), so it’s weak and wind-battered.
So, the bottom line: there’s no standout session in this whole forecast. The only surfable moments are tiny, clean slivers on the 15th, and even those are barely worth a paddle. The rest is either blown out, too big, or flat. For this area, when the wind goes wrong, it can go wrong for a long stretch. Keep your hopes low, your board waxed for the 15th, and wait for a better set of charts.
Rusty.
Short Range ForecastHeavy rain (total 414mm), heaviest during Fri night. Warm (max 31°C on Thu morning, min 26°C on Sat afternoon). Winds increasing (fresh winds from the N on Thu morning, extremely windy from the WSW by Fri afternoon). | Days 4-6 Weather SummaryHeavy rain (total 48mm), heaviest during Sun morning. Warm (max 30°C on Mon morning, min 28°C on Sun morning). Winds decreasing (near gales from the SSE on Sun morning, light winds from the SSW by Tue night). | ||||||||||||||||||||
Thursday 6 | Friday 7 | Saturday 8 | Sunday 9 | Monday 10 | Tuesday 11 | Wednesday 12 | |||||||||||||||
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 16 | E 16 | E 16 | ENE 16 | NNE 12 | ENE 12 | ENE 11 | E 10 | ENE 10 | ENE 15 | E 10 | E 14 | E 13 | E 13 | E 13 | E 12 | E 12 | E 11 | E 11 | E 11 | E 10 |
Wave Graph | |||||||||||||||||||||
7179 | 8356 | 7976 | 6309 | 1764 | 49 | 123 | 53 | 128 | 42 | 92 | 183 | 285 | 277 | 199 | 143 | 138 | 89 | 84 | 82 | 50 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross-off | cross-off | off | cross-off | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross-off | cross-off | cross-off | cross | cross-on |
High Tide | 12:42PM1.57m | 00:09AM1.88m | 2:39PM1.53m | 1:17AM1.84m | 4:26PM1.62m | 2:39AM1.85m | 5:27PM1.74m | 3:54AM1.92m | 6:07PM1.86m | 4:54AM2.01m | 6:39PM1.95m | 5:43AM2.11m | 7:09PM2.03m | ||||||||
Low Tide | 5:49PM1.19m | 7:36AM0.75m | 7:05PM1.34m | 9:02AM0.67m | 8:56PM1.39m | 10:14AM0.55m | 10:23PM1.34m | 11:08AM0.43m | 11:20PM1.24m | 11:53AM0.33m | 00:03AM1.12m | 12:32PM0.26m | 00:41AM0.99m | ||||||||
5:56 | — | — | 5:56 | — | — | 5:56 | — | — | 5:58 | — | — | 5:58 | — | — | 5:58 | — | — | 5:58 | — | — | |
— | 7:12 | — | — | 7:12 | — | — | 7:10 | — | — | 7:09 | — | — | 7:08 | — | — | 7:08 | — | — | 7:07 | — | |
mm | — | — | 18 | 22 | 62 | 209 | 41 | 24 | 38 | 7 | 8 | 11 | 4 | 4 | 7 | 2 | 2 | 3 | 1 | 5 | 3 |
Temp °C | 31 | 30 | 29 | 29 | 29 | 29 | 27 | 27 | 29 | 29 | 29 | 28 | 30 | 29 | 28 | 29 | 29 | 29 | 30 | 29 | 28 |
Feels °C | 31 | 29 | 27 | 24 | 20 | 18 | 16 | 19 | 27 | 26 | 27 | 26 | 31 | 30 | 29 | 31 | 31 | 33 | 34 | 34 | 34 |
Swell 1 Height (m) Direction Period (s) | E 16 | E 16 | E 16 | ENE 16 | NNE 12 | ENE 12 | ENE 11 | E 10 | E 15 | WSW 14 | WSW 14 | W 14 | W 13 | W 12 | W 10 | SW 11 | SW 11 | S 10 | S 9 | SSW 9 | SW 9 |
7179 | 8356 | 7976 | 6309 | 1764 | 49 | 40 | 53 | 17 | 4286 | 2627 | 1895 | 903 | 396 | 218 | 756 | 568 | 569 | 287 | 400 | 190 | |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | E 13 | NNE 15 | ENE 11 | ENE 15 | ENE 10 | E 15 | E 10 | E 14 | E 13 | E 13 | E 13 | W 10 | W 9 | SW 10 | SW 10 | E 11 | S 8 |
— | — | — | — | 623 | 21 | 123 | 21 | 128 | 17 | 92 | 183 | 285 | 277 | 199 | 118 | 99 | 256 | 163 | 82 | 140 | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | ENE 16 | — | ENE 16 | ENE 15 | ENE 15 | ENE 15 | ENE 15 | — | — | — | E 8 | E 12 | E 12 | E 11 | E 11 | W 7 | E 10 |
— | — | — | — | 149 | — | 24 | 42 | 43 | 42 | 71 | — | — | — | 18 | 143 | 138 | 89 | 84 | 8 | 50 | |
Wind waves Height (m) Direction Period (s) | N 6 | N 7 | N 9 | NNW 10 | WNW 10 | SW 12 | SSW 14 | SSW 14 | SSW 14 | S 11 | S 12 | SSW 12 | S 12 | SSW 12 | SSW 12 | S 11 | S 10 | — | — | — | — |
132 | 349 | 1820 | 5606 | 11347 | 21070 | 32838 | 26995 | 14823 | 6796 | 8233 | 6361 | 4390 | 3826 | 3087 | 1172 | 834 | — | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 785 | 785 | 607 | 1309 | 765 | 619 | 765 | 727 | 727 | 727 | 619 | 616 | 842 | 599 | 599 | 622 | 607 | 599 | 76 | 10 | 10 |
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.











