Surf Forecasts:
Yonabaru surf forecast from 30 Aug 2026:
- Best quality surf: Tuesday 1 Sep, 6PM (local time) - 5.5ft (1.7m), 9s period, ESE swell with glassy winds.
- Most powerful swell: Tuesday 1 Sep, 3AM (local time) - 8ft (2.4m), 9s period, ESE swell with 867 kJ wave energy.
- Next surfable swell (1★+): Tuesday 1 Sep, 6PM (local time) - 5.5ft (1.7m), 9s period with ESE 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 6PM. The primary swell is predicted to be 1.7m and 9s period. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Yonabaru in the next 16 days are 2.4m 9s and forecast to arrive on Tuesday (Sep 01) at 3AM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 3.0m 11s period and expected on Wednesday (Sep 02) at 3PM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6PM (Tue 1st Sep) | 5.5ft (1.7m) 9s |
| Best Surf | 6PM (Tue 1st Sep) | 5.5ft (1.7m) 9s |
| Most Powerful | 3AM (Tue 1st Sep) | 8ft (2.4m) 9s |
Table - best surf conditions forecast for Yonabaru over the next 16 days.
The Lowdown
Alright, this is Rusty, and I'm looking at the surf outlook for Yonabaru. I gotta be straight with you – this forecast is a tough one for the next couple of weeks. The energy is there, but the conditions are just refusing to line up for a proper paddle session.
We start off with a real dud. From Sunday the 30th of August right through to Sunday the 6th of September, it’s a write-off. The wind is mostly onshore or cross-onshore, and the surf quality is just poor. Even when the swell gets a bit of push on the 1st of September, with a 8ft east swell, the onshore wind and risk of thunderstorms ruin it. The combined energy climbs all the way up to 1349 (moderate wave energy), but it’s all for nothing. Then we get a big drop, with the swell getting tiny and messy.
The week of the 7th to the 9th is a bit of a tease. The swell picks up a little, and the period stretches out to 11-12 seconds, which is proper groundswell. Combined energy hits 894 (moderate) on the 9th, but the wind is still onshore, keeping everything in the “poor” category.
Now, the 10th and 11th of September is where things get interesting, but not for the right reasons. On Thursday the 10th, we’ve got a 7ft swell from the ESE at 13 seconds (very long period), and the combined energy jumps to 2271 (strong). The wind is onshore, though, so it’s a messy, choppy mess. The reports say "marginal" at best.
Then comes Friday the 11th. This is the big one. We’re looking at a 15ft swell, but it’s coming from the NNW and NW. That’s a massive, powerful swell, and the combined energy is a whopping 6047 (very strong wave energy). The wind is cross-onshore, and the report warns that the swell is predicted to be too big for this break. At over 8ft, this is expert territory only. This is not a day for a beginner, and honestly, for a spot like this, it looks more like a windows-down, drive-past-and-watch kind of day. This setup looks more interesting for kite surfing than paddle surfing.
After that, the swell drops off a cliff. Saturday the 12th is flat with a tiny 1ft. Then on Sunday the 13th, we get a brief pulse of 8ft from the NW with a 12-second period, but it’s cross-onshore again and the quality is only marginal. The energy is high at 2543 (strong), but the wind is the enemy.
The outlook finishes on Monday the 14th with a 5ft swell from the NW, but the wind is still cross-onshore, and it’s back to poor conditions.
So, the honest truth? There are no standouts in this 16-day window. The swell is either too small, too messy, or way too big for the conditions. The water temperature is about 84° on the first day, which is normal for the time of year, but that’s little comfort when the surf is a mess. We’re looking at a long, blank run here. It’s a classic case of "the waiting game." Keep your eyes on the charts, because it tends not to stay this poor for long.
Rusty.
Short Range ForecastHeavy rain (total 28mm), heaviest during Tue morning. Warm (max 29°C on Sun afternoon, min 26°C on Sun night). Winds decreasing (fresh winds from the E on Mon night, calm by Tue afternoon). | Days 5-7 Weather SummaryModerate rain (total 11mm), heaviest on Wed afternoon. Warm (max 29°C on Fri afternoon, min 26°C on Wed afternoon). Mainly fresh winds. | |||||||||||||||||||
Sun 30 | Monday 31 | Tuesday 1 | Wednesday 2 | Thursday 3 | Friday 4 | Saturday 5 | ||||||||||||||
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) | ESE 7 | ESE 7 | ESE 7 | ESE 8 | ESE 8 | ESE 9 | E 9 | E 9 | E 9 | E 8 | E 11 | ENE 11 | SE 9 | SE 9 | E 10 | ESE 8 | ESE 8 | E 10 | E 10 | E 9 |
Wave Graph | ||||||||||||||||||||
115 | 139 | 176 | 404 | 758 | 711 | 809 | 412 | 340 | 187 | 65 | 93 | 22 | 560 | 18 | 169 | 95 | 48 | 45 | 57 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | on | on | on | on | on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | on | on | on | cross-on | cross-on | cross-on |
High Tide | 8:23PM2.15m | 8:39AM2.14m | 8:50PM2.13m | 9:20AM2.02m | 9:18PM2.09m | 10:05AM1.87m | 9:49PM2.03m | 10:59AM1.71m | 10:24PM1.95m | 12:18PM1.57m | 11:11PM1.85m | 2:28PM1.53m | 00:28AM1.76m | |||||||
Low Tide | 2:31AM0.54m | 2:44PM0.61m | 3:07AM0.52m | 3:14PM0.77m | 3:47AM0.54m | 3:45PM0.94m | 4:34AM0.60m | 4:18PM1.11m | 5:32AM0.67m | 5:02PM1.28m | 6:54AM0.73m | 6:31PM1.41m | ||||||||
— | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — | |
6:51 | — | — | 6:50 | — | — | 6:49 | — | — | 6:47 | — | — | 6:46 | — | — | 6:45 | — | — | 6:45 | — | |
mm | — | — | — | — | 6 | 5 | 7 | 4 | 6 | 3 | 3 | 1 | 2 | 2 | — | — | — | — | — | 1 |
Temp °C | 29 | 27 | 28 | 28 | 27 | 28 | 28 | 27 | 28 | 27 | 27 | 28 | 28 | 27 | 28 | 29 | 27 | 29 | 29 | 27 |
Feels °C | 31 | 29 | 29 | 28 | 28 | 32 | 32 | 31 | 31 | 30 | 29 | 29 | 30 | 29 | 30 | 31 | 29 | 30 | 30 | 26 |
Swell 1 Height (m) Direction Period (s) | SSW 8 | S 8 | S 9 | SSW 9 | SW 9 | S 8 | ESE 9 | SSW 11 | SSW 11 | E 8 | E 11 | E 11 | SW 11 | SW 12 | SW 11 | ESE 8 | SSW 9 | S 8 | SSW 8 | S 8 |
154 | 66 | 99 | 111 | 29 | 30 | 522 | 584 | 909 | 187 | 23 | 38 | 398 | 448 | 142 | 169 | 260 | 147 | 62 | 86 | |
Swell 2 Height (m) Direction Period (s) | E 12 | SW 9 | SW 9 | SW 10 | SSW 8 | SW 10 | SSW 10 | E 9 | E 9 | E 12 | E 11 | ENE 11 | E 11 | E 8 | E 10 | E 10 | ESE 8 | ESE 7 | ESE 8 | NW 8 |
44 | 51 | 38 | 45 | 22 | 46 | 200 | 412 | 340 | 26 | 65 | 93 | 21 | 149 | 18 | 18 | 95 | 48 | 40 | 49 | |
Swell 3 Height (m) Direction Period (s) | SE 10 | E 11 | SW 9 | — | S 8 | S 9 | E 15 | E 14 | ENE 13 | — | — | — | SE 9 | E 18 | W 7 | W 6 | E 10 | E 10 | E 10 | E 9 |
4 | 40 | 40 | — | 10 | 14 | 18 | 16 | 55 | — | — | — | 22 | 6 | 1 | 1 | 30 | 46 | 45 | 57 | |
Wind waves Height (m) Direction Period (s) | ESE 7 | ESE 7 | ESE 7 | ESE 8 | ESE 8 | ESE 9 | E 9 | — | — | SSW 11 | S 11 | S 11 | SSE 9 | SE 9 | SSE 10 | SSW 10 | — | — | — | — |
115 | 139 | 176 | 404 | 758 | 711 | 809 | — | — | 2003 | 1739 | 1210 | 508 | 560 | 712 | 463 | — | — | — | — | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 13 | 13 | 13 | 16 | 670 | 13 | 10 | 13 | 10 | 10 | 616 | 622 | 13 | 13 | 13 | 13 | 16 | 16 | 670 | 607 |
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.











