
Surf Forecasts:
Yonabaru surf forecast from 5 Aug 2026:
- Best quality surf: Thursday 6 Aug, 9AM (local time) - 11ft (3.5m), 16s period, E swell with cross-shore winds.
- Most powerful swell: Friday 7 Aug, 3PM (local time) - 30ft (9.0m), 12s period, NW swell with 23,712 kJ wave energy.
- Next surfable swell (1★+): Thursday 6 Aug, 9AM (local time) - 11ft (3.5m), 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 9AM. The primary swell is predicted to be 3.5m and 16s period with a secondary swell of 1.7m and 6s. 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 9.0m 12s and forecast to arrive on Friday (Aug 07) 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 10.5m 14s period and expected on Saturday (Aug 08) at 9AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9AM (Thu 6th Aug) | 11ft (3.5m) 16s |
| Best Surf | 9AM (Thu 6th Aug) | 11ft (3.5m) 16s |
| Most Powerful | 3PM (Fri 7th Aug) | 30ft (9.0m) 12s |
Table - best surf conditions forecast for Yonabaru over the next 16 days.
The Lowdown
Alright, Rusty here. Let’s break it down for the next couple of weeks.
We’ve only got one spot on the radar this period: Yonabaru. Look, I’m gonna be straight with you – this isn't shaping up to be a classic run. There’s a massive, dangerous event coming through that will wipe out any real chance of a decent session for a while, and after that, it's mostly small, junky leftovers with onshore slop.
Right off the bat, we have a huge pulse of easterly swell hitting on Thursday, 6th August. We’re looking at a solid 11.5ft to 13.1ft of long-period groundswell from the east (16 seconds), which carries very strong wave energy (7016 / 8809). The water is a touch warmer than normal at 86.9° and the wind is howling from the north – that's cross/cross-off, so the surface would be clean, but this swell is simply too big. That’s expert-only territory, and even then, it’s going to be maxed out and charging hard.
On Friday, 7th August, things go from big to apocalyptic. We’ve got hurricane-force winds from the west and a 29.5ft NW swell with a staggering 25775 energy reading. That’s not surf, that’s survival. Dangerous conditions, flat-out stay out of the water. A severe gale on Friday morning ramps up the whole chaotic mess. This storm blows through, and from Saturday, 8th August through the following week, the swell drops right off a cliff.
From Saturday the 8th right through to Tuesday the 11th, it’s small and messy. Most calls are “poor surf conditions.” You’re looking at tiny waves under 3ft with periods under 14 seconds, driven by cross-shore winds from the south. The energy values are in the low triple digits at best (91, 133, 277). Not worth paddling out.
We finally get a little window around Wednesday, 12th August. It’s still small – only 2ft from the east with an 11-second period – but conditions ease right up. Light breezes, some clean offshore WNW wind in the afternoon. Energy is weak (86), but it’s “surfable” for a beginner. For a complete beginner at Yonabaru, that’s actually your window. Thursday the 13th and Friday the 14th also see similar small, clean windows with light winds, but again, we’re talking about knee-high, weak little runners.
After that, from the 15th onwards, we’re back into a long stretch of onshore and cross-shore winds from the north and east. The swell tries to pick up a touch around the 19th and 20th of August – hitting 5.6ft to 6.9ft – but it’s onshore wind with a period dropping to 6-9 seconds, making it short-period, choppy, and ugly. It’s basically a blown-out mess for anyone not on a kite.
The best on offer? Honestly, the only real standouts are the conditions on Wednesday, 12th August, and Friday, 14th August. If you are a beginner, Thursday and Friday morning of that second week (the 14th) offer small, clean waves with offshore winds. It’s not going to be a day for the history books, but you’ll have a clean, fun little wave all to yourself. For anyone else, it’s a dry spell.
Short Range ForecastHeavy rain (total 651mm), heaviest during Sat morning. Warm (max 31°C on Thu morning, min 27°C on Thu night). Winds increasing (fresh winds from the N on Thu morning, extremely windy from the S by Fri night). | Days 4-6 Weather SummaryHeavy rain (total 30mm), heaviest during Sun morning. Warm (max 31°C on Tue morning, min 28°C on Mon night). Winds decreasing (near gales from the S on Sun morning, light winds from the SW 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 17 | ENE 16 | NW 12 | NW 11 | ENE 11 | ENE 11 | ENE 10 | ENE 10 | ENE 14 | E 14 | E 13 | E 13 | E 13 | E 12 | S 10 | E 12 | E 11 | E 11 | E 10 |
Wave Graph | |||||||||||||||||||||
6799 | 8356 | 10963 | 10379 | 23712 | 729 | 93 | 91 | 128 | 74 | 70 | 140 | 225 | 277 | 199 | 141 | 0 | 130 | 86 | 86 | 78 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-off | cross-off | cross-off | off | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross-off | cross-off | cross-off | cross-off | cross-off | off | cross-off |
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 | — | — | 20 | 53 | 139 | 221 | 150 | 43 | 25 | 7 | 3 | 1 | 3 | 4 | 6 | 3 | 2 | 1 | 1 | — | — |
Temp °C | 31 | 30 | 29 | 28 | 29 | 29 | 28 | 28 | 29 | 29 | 29 | 30 | 29 | 29 | 28 | 31 | 31 | 29 | 30 | 30 | 29 |
Feels °C | 31 | 29 | 27 | 20 | 14 | 23 | 11 | 17 | 23 | 25 | 26 | 29 | 29 | 29 | 29 | 33 | 34 | 33 | 35 | 35 | 35 |
Swell 1 Height (m) Direction Period (s) | E 16 | E 16 | E 17 | ENE 16 | ENE 13 | NW 11 | ENE 11 | ENE 11 | SW 14 | E 15 | WSW 14 | W 14 | W 13 | W 12 | W 10 | SW 11 | S 10 | S 10 | SSW 9 | SSW 9 | SSW 9 |
6799 | 8356 | 10963 | 10379 | 1616 | 729 | 93 | 91 | 8119 | 17 | 3826 | 2981 | 932 | 535 | 252 | 629 | 926 | 502 | 471 | 400 | 221 | |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | NNE 13 | NNE 11 | — | — | ENE 10 | ENE 10 | E 14 | E 14 | E 13 | E 13 | E 13 | W 9 | SW 11 | SW 10 | E 11 | E 11 | S 10 |
— | — | — | — | 447 | 214 | — | — | 128 | 74 | 37 | 140 | 225 | 277 | 199 | 129 | 344 | 290 | 86 | 86 | 200 | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | NW 15 | — | — | ENE 15 | ENE 15 | ENE 14 | — | — | — | E 7 | E 12 | W 8 | E 12 | W 8 | W 7 | E 10 |
— | — | — | — | — | 176 | — | — | 42 | 42 | 70 | — | — | — | 17 | 141 | 63 | 130 | 18 | 15 | 78 | |
Wind waves Height (m) Direction Period (s) | N 6 | N 7 | N 9 | NNW 10 | NW 12 | S 11 | S 14 | SSW 15 | SSW 14 | SSW 13 | S 12 | S 12 | SSW 12 | SSW 12 | SSW 12 | S 11 | SSE 10 | — | — | — | — |
217 | 453 | 2085 | 6880 | 23712 | 15408 | 42875 | 38603 | 22270 | 15941 | 9761 | 7573 | 5089 | 3826 | 2990 | 1066 | 511 | — | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 765 | 785 | 607 | 1309 | 765 | 727 | 727 | 727 | 727 | 727 | 727 | 618 | 599 | 599 | 599 | 599 | 619 | 78 | 0 | 0 | 0 |
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.











