Surf Forecasts:
Yonabaru surf forecast from 8 Aug 2026:
- Best quality surf: Wednesday 12 Aug, 3AM (local time) - 2ft (0.6m), 11s period, E swell with cross-offshore winds.
- Most powerful swell: Monday 10 Aug, 9AM (local time) - 3.5ft (1.0m), 14s period, E swell with 372 kJ wave energy.
- Next surfable swell (1★+): Wednesday 12 Aug, 3AM (local time) - 2ft (0.6m), 11s 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 Wednesday (Aug 12) at 3AM. The primary swell is predicted to be 0.6m and 11s period. 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 1.0m 14s and forecast to arrive on Monday (Aug 10) at 9AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 6.5m 12s period and expected on Saturday (Aug 08) at 3PM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3AM (Wed 12th Aug) | 2ft (0.6m) 11s |
| Best Surf | 3AM (Wed 12th Aug) | 2ft (0.6m) 11s |
| Most Powerful | 9AM (Mon 10th Aug) | 3.5ft (1.0m) 14s |
Table - best surf conditions forecast for Yonabaru over the next 16 days.
The Lowdown
Right, folks. Rusty here. Let’s see what this stretch has in store for us around the Yonabaru area.
Honestly, it’s a grim start. We’re looking at a solid run of pretty ordinary conditions for the first week or so. The wind is a real problem. Gale force cross-shore winds on Saturday the 8th and Sunday the 9th are just trashing any chance of a wave, with a weak little 2ft swell from the ENE. The wind state is “gale force cross-shore with large crossing waves” – that’s a write-off. That carries on through the start of the next week; Monday the 10th has a bit more energy in the water (combined energy of 372), with a 3ft easterly swell, but it’s cross-onshore and choppy. There’s nothing to get excited about. The water temps are a touch warmer than normal for this time of year, sitting at 86°F, but that’s not gonna help the surf.
The first real glimmer of anything resembling a surf comes on the morning of Wednesday the 12th. The wind drops to a light breeze and it’s clean, with a small 2ft easterly swell. The combined energy is weak (93), but it’s surfable. It’s a beginner-friendly spot, Yonabaru, so for a total rookie, maybe a few knee-high lumps. But it’s hardly a standout. The afternoon looks like it’ll get messy again.
We get another tiny window on the morning of Thursday the 14th. Glassy conditions, a 2ft swell from the ESE, but the period is a short 6 seconds, so it’s just wind chop. Combined energy is a paltry 70. It’s surfable, but just barely.
Now, the second week is where things get interesting, but it’s not for the faint of heart. From the 19th of August, we start seeing some proper size. The swell jumps up, but the wind swings onshore and stays that way. On the morning of the 20th, we’ve got an 12ft easterly swell with a solid 10-second period. The combined energy of all swells is a massive 2129, which means there’s a ton of power in the water. But the wind is 25 mph from the east, straight onshore. This is big, raw, messy, and dangerous. For a beginner spot like Yonabaru, this is a total no-go. It’s only for the most experienced, and even then, it’ll be a battle. The afternoon of the 21st is still a 8ft SE swell with 19 mph onshore winds. This is kite-surfing territory, not paddle surfing.
The best bet? Honestly, there isn’t a true standout. If you’re desperate for a paddle, the morning of the 12th of August is your best option for a clean, small wave. For the big stuff, the 20th and 21st have the size, but the wind is horrible. It’s a waiting game.
Rusty, signing off.
Short Range ForecastHeavy rain (total 51mm), heaviest during Sat morning. Warm (max 30°C on Mon morning, min 27°C on Sat afternoon). Winds decreasing (gales from the S on Sat morning, light winds from the SSE by Mon night). | Days 4-6 Weather SummaryModerate rain (total 15mm), heaviest on Thu night. Warm (max 30°C on Tue morning, min 27°C on Thu night). Wind will be generally light. | ||||||||||||||||||||
Saturday 8 | Sunday 9 | Monday 10 | Tuesday 11 | Wednesday 12 | Thursday 13 | Friday 14 | |||||||||||||||
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) | ENE 11 | E 11 | E 10 | E 10 | E 9 | E 14 | E 14 | E 13 | E 12 | E 12 | E 12 | E 12 | E 11 | E 11 | E 10 | E 10 | ENE 10 | E 10 | ESE 6 | ESE 6 | ESE 6 |
Wave Graph  | |||||||||||||||||||||
 kJ | 128 | 110 | 69 | 90 | 83 | 311 | 372 | 280 | 306 | 229 | 134 | 127 | 88 | 83 | 51 | 50 | 32 | 29 | 39 | 30 | 28 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross | cross | cross | cross-on | cross-on | cross-on | cross | cross | cross | cross-off | cross-off | cross | on | cross-on | cross | cross-on | glassy | glassy | cross-on |
High Tide | 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 | 6:27AM2.18m | 7:37PM2.08m | 7:08AM2.22m | 8:05PM2.11m | ||||||||
Low Tide | 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 | 1:07PM0.25m | 1:17AM0.87m | 1:41PM0.28m | 1:51AM0.76m | |||||||
 |  |  | | | | | | | | |  |  | | | | | | | |  | |
 | 5:56 | — | — | 5:58 | — | — | 5:58 | — | — | 5:58 | — | — | 5:58 | — | — | 5:58 | — | — | 6:00 | — | — |
 | — | 7:10 | — | — | 7:09 | — | — | 7:08 | — | — | 7:08 | — | — | 7:07 | — | — | 7:07 | — | — | 7:06 | — |
mm | 15 | 4 | 7 | 6 | 4 | 9 | 1 | 2 | 3 | 1 | 2 | — | — | 3 | 1 | — | 2 | 6 | 5 | 5 | 2 |
Temp °C | 28 | 28 | 28 | 28 | 29 | 28 | 30 | 30 | 28 | 30 | 30 | 28 | 30 | 30 | 28 | 30 | 30 | 28 | 29 | 28 | 27 |
Feels °C | 22 | 24 | 24 | 28 | 29 | 28 | 32 | 32 | 31 | 33 | 33 | 32 | 35 | 35 | 33 | 34 | 34 | 33 | 34 | 33 | 31 |
Swell 1 Height (m) Direction Period (s) | ENE 11 | E 11 | E 10 | WSW 13 | WSW 12 | W 11 | SW 11 | SW 11 | S 11 | S 10 | S 10 | S 10 | SSW 9 | SSW 9 | S 9 | SSW 9 | SW 8 | SSW 9 | SSW 8 | SW 8 | S 8 |
| kJ | 128 | 110 | 69 | 2976 | 1376 | 426 | 662 | 743 | 826 | 676 | 650 | 546 | 573 | 400 | 198 | 287 | 102 | 189 | 151 | 69 | 60 |
Swell 2 Height (m) Direction Period (s) | — | ENE 15 | E 15 | E 10 | E 9 | E 14 | W 11 | E 13 | SW 11 | SW 11 | SW 11 | SW 10 | E 11 | E 11 | SW 9 | E 10 | S 9 | E 6 | ESE 6 | ESE 6 | ESE 6 |
| kJ | — | 21 | 17 | 90 | 83 | 311 | 235 | 280 | 629 | 422 | 357 | 284 | 88 | 83 | 117 | 50 | 99 | 20 | 39 | 30 | 28 |
Swell 3 Height (m) Direction Period (s) | — | — | ENE 15 | E 15 | E 15 | — | E 14 | W 10 | E 12 | E 12 | E 12 | E 12 | N 8 | N 8 | E 10 | W 8 | ENE 10 | E 10 | E 10 | S 9 | SW 8 |
| kJ | — | — | 43 | 17 | 38 | — | 372 | 130 | 306 | 229 | 134 | 127 | 5 | 5 | 51 | 10 | 32 | 29 | 31 | 73 | 42 |
Wind waves Height (m) Direction Period (s) | SSW 11 | SSW 12 | SSW 11 | S 9 | S 10 | S 10 | S 10 | S 11 | — | — | — | S 10 | W 7 | W 7 | — | — | N 3 | — | — | — | — |
| kJ | 10360 | 12168 | 7518 | 1918 | 2324 | 2881 | 1461 | 1174 | — | — | — | 332 | 17 | 24 | — | — | 1 | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 1003 | 727 | 727 | 619 | 616 | 599 | 607 | 599 | 599 | 599 | 634 | 607 | 0 | 10 | 10 | 13 | 13 | 13 | 0 | 13 | 13 |
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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