
Surf Forecasts:
Yonabaru surf forecast from 5 Aug 2026:
- Best quality surf: Thursday 6 Aug, 3AM (local time) - 11ft (3.5m), 17s period, E swell with cross-shore winds.
- Most powerful swell: Friday 7 Aug, 3PM (local time) - 31ft (9.5m), 12s period, NNW swell with 27,616 kJ wave energy.
- Next surfable swell (1★+): Thursday 6 Aug, 3AM (local time) - 11ft (3.5m), 17s 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 3AM. The primary swell is predicted to be 3.5m and 17s period with a secondary swell of 1.1m and 5s. 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 9.5m 12s and forecast to arrive on Friday (Aug 07) at 3PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 11.5m 15s period and expected on Saturday (Aug 08) at 12PM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3AM (Thu 6th Aug) | 11ft (3.5m) 17s |
| Best Surf | 3AM (Thu 6th Aug) | 11ft (3.5m) 17s |
| Most Powerful | 3PM (Fri 7th Aug) | 31ft (9.5m) 12s |
Table - best surf conditions forecast for Yonabaru over the next 16 days.
The Lowdown
Alright, Rusty here. Let’s break down the local surf outlook.
Look, I’ll be straight with you – this forecast is a real mixed bag. We’ve got a massive pulse of energy coming, but it’s going to be a dangerous, messy mess for the first few days before things drop off. The window for a decent wave is a long way off, so you’ll need to be patient.
The action starts on Thursday, 6th August, but it’s not a good start. Yonabaru is looking at a huge 12 ft swell from the east with a very long period of 16 seconds. The combined wave energy is a massive 7377 (moderate energy). Add a strong 30 km/h cross-shore wind, and it’s going to be a lumpy, cross-chop mess. The setups here are just too big – this is expert territory only, and even then, it’s not going to be pretty. Conditions get worse in the afternoon with a 13 ft swell and 40 km/h winds, making it a total write-off.
Friday, 7th August is where things get full-on. We’re looking at a 16 ft swell on Friday morning, ramping up to a terrifying 31 ft by the afternoon, with hurricane-force winds hitting 125 km/h. The wave energy is off the charts at 22905 and 32649 (strong to very strong wave energy). This is a full-on tropical storm scenario. The surf is massive and dangerous – for experts only, and honestly, it’s more of a survival situation than a surf session. The whole weekend is a washout. Saturday, 8th August has hurricane-force winds and no surfable swell, followed by Sunday and Monday with tiny, weak waves and strong winds.
We then hit a long, flat spell. From Tuesday, 11th August through to Wednesday, 13th August, there’s next to nothing. The water temperature is about average for the time of year, so no surprises there.
Finally, we get a glimmer of hope. On Wednesday, 12th August, during the afternoon, we see a tiny 2 ft swell from the east with a period of 11 seconds, with a gentle cross-offshore breeze. The wave energy is a weak 89. It’s small and ordinary, but at least it’s clean. The best of a bad bunch, really.
The standout (and I use that term loosely) has to be the afternoon of Thursday, 13th August. The swell is only 2 ft from the east, but the wind is a light 15 km/h offshore from the west-southwest. This will be glassy and clean as a whistle. For a longboard or a funboard, this is your only real chance to get a clean, if tiny, wave. The water is clean, the wind is off, and it’s just you and the ocean. It’s not a classic, but it’s the most pleasant option on the table.
The rest of the outlook through to Friday, 21st August is a mix of tiny, weak swells, and mostly onshore or cross-shore winds. The swells are short period (6-9 seconds), so they’ll be weak and lack any real push. At Yonabaru, the 4 ft swell on Tuesday, 18th August is the biggest of the later period, but it’s a short-period, onshore wind swell that will be choppy and messy. Not worth the paddle.
So, to wrap it up: the first week is a write-off from dangerous, huge surf. The second week is flat and then tiny. Your one true window for a clean, quiet session is the afternoon of Thursday, 13th August. Get the longboard.
Rusty.
Short Range ForecastHeavy rain (total 536mm), heaviest during Sat afternoon. Warm (max 31°C on Thu morning, min 28°C on Wed night). Winds increasing (light winds from the NNE on Wed night, extremely windy from the S by Sat morning). | Days 5-7 Weather SummaryHeavy rain (total 128mm), heaviest during Sat night. Warm (max 31°C on Tue morning, min 28°C on Sat night). Winds decreasing (extremely windy from the S on Sat night, moderate winds from the SW by Tue afternoon). | ||||||||||||||||||
Thursday 6 | Friday 7 | Saturday 8 | Sunday 9 | Monday 10 | Tuesday 11 | ||||||||||||||
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 17 | E 16 | E 17 | E 17 | E 17 | NNW 12 | NW 11 | S 14 | S 16 | ENE 15 | ENE 15 | E 14 | E 14 | E 14 | E 13 | E 13 | S 10 | S 10 | S 10 |
Wave Graph | |||||||||||||||||||
6369 | 7179 | 10047 | 13371 | 12714 | 27616 | 2106 | 0 | 0 | 43 | 42 | 107 | 132 | 249 | 225 | 209 | 0 | 0 | 0 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross | cross-off | cross-off | cross-off | cross-off | cross | cross | cross | cross | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off |
High Tide | 11:19PM1.94m | 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 | |||||||
Low Tide | 6:16AM0.76m | 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 | |||||||
— | 5:56 | — | — | 5:56 | — | — | 5:56 | — | — | 5:58 | — | — | 5:58 | — | — | 5:58 | — | — | |
7:13 | — | 7:12 | — | — | 7:12 | — | — | 7:10 | — | — | 7:09 | — | — | 7:08 | — | — | 7:08 | — | |
mm | 1 | — | — | 15 | 37 | 151 | 42 | 132 | 158 | 98 | 9 | 4 | 10 | 1 | — | 5 | 1 | — | — |
Temp °C | 29 | 31 | 30 | 29 | 28 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 30 | 30 | 30 | 29 | 31 | 31 | 29 |
Feels °C | 31 | 30 | 29 | 26 | 19 | 15 | 26 | 11 | 14 | 20 | 22 | 23 | 27 | 30 | 30 | 30 | 33 | 34 | 34 |
Swell 1 Height (m) Direction Period (s) | E 17 | E 16 | E 17 | E 17 | E 17 | E 14 | NW 11 | — | — | ENE 15 | WSW 15 | E 14 | W 15 | W 14 | W 13 | W 11 | S 10 | S 10 | S 10 |
6369 | 7179 | 10047 | 13371 | 12714 | 3071 | 2106 | — | — | 43 | 6123 | 37 | 5872 | 2609 | 1510 | 607 | 1481 | 1046 | 687 | |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | NNE 14 | WSW 10 | — | — | — | ENE 15 | E 14 | E 14 | E 14 | E 13 | E 13 | SW 12 | SW 11 | SW 10 |
— | — | — | — | — | 1962 | 772 | — | — | — | 42 | 107 | 132 | 249 | 225 | 209 | 594 | 382 | 377 | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | NNE 12 | — | — | — | ENE 15 | ENE 14 | — | — | — | — | W 9 | W 9 | W 9 |
— | — | — | — | — | — | 964 | — | — | — | 42 | 70 | — | — | — | — | 244 | 152 | 99 | |
Wind waves Height (m) Direction Period (s) | NNE 5 | NNE 6 | N 7 | N 9 | NNW 10 | NNW 12 | S 10 | S 14 | S 16 | SSW 15 | SSW 14 | SSW 14 | S 12 | SSW 12 | SSW 12 | SSW 12 | — | — | — |
46 | 198 | 569 | 2244 | 10191 | 27616 | 1690 | 41917 | 59284 | 40527 | 26692 | 20926 | 6575 | 5378 | 4351 | 3683 | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 607 | 785 | 785 | 607 | 1309 | 765 | 727 | 765 | 727 | 727 | 727 | 727 | 727 | 616 | 599 | 599 | 599 | 599 | 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.











