
Surf Forecasts:
Yonabaru surf forecast from 9 Sep 2026:
- Most powerful swell: Thursday 10 Sep, 3PM (local time) - 4ft (1.2m), 9s period, N swell with 235 kJ wave energy.
Best Forecast Surf Conditions for Yonabaru this week:
The most powerful waves expected at Yonabaru in the next 16 days are 1.2m 9s and forecast to arrive on Thursday (Sep 10) at 3PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 7s period and expected on Saturday (Sep 12) at 9PM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 3PM (Thu 10th Sep) | 4ft (1.2m) 9s |
Table - best surf conditions forecast for Yonabaru over the next 16 days.
The Lowdown
G’day, Rusty here. Let’s be straight with you. The next couple of weeks are going to be a real test of patience for anyone looking for a wave around Yonabaru. The ocean’s going to be full of energy, but most of it is just gonna be messy, onshore slop. If you’re a beginner or just want a clean, easy session, you might want to find something else to do for a while.
The long-range picture does have a pulse, but it’s a long way off and it’s not for the faint of heart. For the next week plus, it’s pretty grim. From Wednesday the 9th all the way through to Friday the 18th, we’re looking at a stretch with nothing worth paddling out for. Swell heights hover around the 1ft to 4ft mark with short, weak periods. The wind is mostly cross or onshore, keeping the surface chopped up. There’s a moment on the 12th and 13th where a bigger period shows up, but the swell is tiny and the wind is still junk. It’s not going to be any fun.
Then things get interesting, but it's a double-edged sword. On Saturday the 19th, we finally see some proper size roll in. The swell jumps to 5ft in the morning and pushes to 7ft by the afternoon, coming from the ESE with a solid 17-second period. The energy jumps to a strong 1581 then 2981. But the wind is cross-onshore and moderate, so it’s going to be lumpy and bumpy. It’s a marginal call at best, not the clean, lined-up waves we’d all be hoping for after such a flat spell.
Sunday the 20th is the only real standout, and it’s a serious one. The swell is up to a solid 10ft from the ESE with a 16-second period in the morning. That’s a lot of water. The combined energy is a massive 5177. This is big, expert-only territory. The wind is a fresh cross-shore breeze, so it won't be perfect, but there’s going to be plenty of power. Afternoon sees it back at a still-chunky 8ft with energy at 3487. For the experienced crew, this is the day to clear your schedule. If you’re not a pro, stay well clear. The size and the cross-wind will make it a washing machine.
After that blow-out, the ocean takes a breather. From Monday the 21st into Tuesday the 22nd, we get gale-force winds – we’re talking 37 to 43 mph – which will just shred the surface. The swell drops right back down. By Wednesday the 23rd, things get clean – actually glassy with offshore winds – but the swell is tiny, around 2ft. It’s pretty, but there’s nothing to ride.
The last call on Thursday the 24th is a bit of a tease. We get a clean little pulse of 4ft to 4ft from the ESE with a long 14-15 second period. The energy is back up to a moderate 537 to 769, and the winds are light and offshore. It looks clean, but the size is still pretty small and it’s over a week away, so treat it as promising but not guaranteed.
The water temp is 84°F, which is about normal for this time of year. The first real session we talk about, that big Sunday swell, the water will be right around that mark.
So, bottom line: don’t get excited about the near term. The standout is Sunday the 20th for the big-wave crew, and maybe a glimmer of hope on the 24th for something cleaner but smaller. The rest is a write-off.
Rusty.
Short Range ForecastLight rain (total 8mm), mostly falling on Fri afternoon. Warm (max 28°C on Wed afternoon, min 26°C on Wed night). Wind will be generally light. | Days 5-7 Weather SummaryHeavy rain (total 20mm), heaviest during Mon afternoon. Warm (max 29°C on Tue morning, min 25°C on Mon night). Wind will be generally light. | |||||||||||||||||||
Wed 9 | Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | Tuesday 15 | ||||||||||||||
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) | N 8 | N 8 | N 9 | N 9 | N 9 | NNW 9 | N 8 | SE 6 | SE 6 | E 14 | E 14 | E 14 | E 6 | E 7 | E 8 | E 9 | E 9 | E 9 | ESE 9 | E 9 |
Wave Graph | ||||||||||||||||||||
182 | 74 | 185 | 235 | 160 | 123 | 84 | 61 | 74 | 64 | 62 | 61 | 78 | 134 | 153 | 181 | 194 | 203 | 216 | 173 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross | cross | on | cross-on | on | cross-on | on | on | on | cross-on | on | on | on | cross-on | on | on | cross | cross-on |
High Tide | 6:06PM1.97m | 5:36AM2.07m | 6:32PM2.04m | 6:18AM2.16m | 6:58PM2.10m | 6:58AM2.21m | 7:23PM2.14m | 7:35AM2.21m | 7:49PM2.16m | 8:13AM2.16m | 8:15PM2.15m | 8:52AM2.06m | 8:43PM2.13m | |||||||
Low Tide | 11:47PM0.94m | 12:08PM0.38m | 00:21AM0.77m | 12:42PM0.38m | 00:54AM0.63m | 1:14PM0.43m | 1:27AM0.51m | 1:44PM0.51m | 2:00AM0.44m | 2:14PM0.62m | 2:35AM0.41m | 2:43PM0.76m | ||||||||
— | — | 6:11 | — | — | 6:11 | — | — | 6:11 | — | — | 6:13 | — | — | 6:13 | — | — | 6:13 | — | — | |
6:40 | — | — | 6:38 | — | — | 6:37 | — | — | 6:37 | — | — | 6:36 | — | — | 6:35 | — | — | 6:34 | — | |
mm | — | — | — | — | 1 | — | 4 | 3 | — | — | — | 2 | 1 | 1 | 2 | 5 | 9 | — | 1 | 8 |
Temp °C | 28 | 27 | 28 | 28 | 28 | 28 | 28 | 27 | 28 | 28 | 27 | 27 | 28 | 27 | 28 | 28 | 26 | 29 | 29 | 27 |
Feels °C | 29 | 30 | 32 | 32 | 33 | 32 | 31 | 30 | 31 | 30 | 30 | 28 | 30 | 29 | 31 | 30 | 28 | 33 | 33 | 31 |
Swell 1 Height (m) Direction Period (s) | S 7 | NW 6 | N 9 | N 9 | N 9 | NNW 9 | N 8 | N 8 | SE 6 | NNW 7 | S 6 | E 14 | E 14 | E 13 | E 8 | E 9 | E 9 | E 9 | ESE 9 | E 9 |
10 | 11 | 185 | 235 | 160 | 123 | 84 | 42 | 74 | 17 | 22 | 61 | 62 | 56 | 153 | 181 | 194 | 203 | 216 | 173 | |
Swell 2 Height (m) Direction Period (s) | E 9 | SE 9 | SE 9 | SE 9 | SE 9 | ESE 8 | ESE 9 | E 15 | N 7 | E 14 | E 14 | S 7 | S 6 | S 7 | E 13 | E 13 | E 13 | SW 9 | SW 9 | SW 11 |
6 | 21 | 21 | 21 | 20 | 40 | 67 | 38 | 27 | 64 | 62 | 14 | 7 | 9 | 55 | 54 | 54 | 13 | 12 | 30 | |
Swell 3 Height (m) Direction Period (s) | SE 10 | S 7 | S 7 | S 7 | ESE 6 | S 7 | S 7 | S 6 | E 14 | S 7 | NNW 7 | ESE 9 | N 6 | N 5 | S 7 | SW 10 | SW 9 | N 4 | N 4 | NNW 5 |
15 | 9 | 8 | 8 | 8 | 9 | 8 | 7 | 61 | 9 | 15 | 16 | 6 | 2 | 8 | 15 | 13 | 1 | 1 | 3 | |
Wind waves Height (m) Direction Period (s) | N 8 | N 8 | — | — | — | ESE 5 | ESE 7 | SE 6 | — | SE 6 | E 5 | E 6 | E 6 | E 7 | N 5 | N 5 | NNE 4 | — | — | — |
182 | 74 | — | — | — | 15 | 59 | 61 | — | 60 | 37 | 50 | 78 | 134 | 2 | 1 | 5 | — | — | — | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 670 | 49 | 14 | 14 | 10 | 10 | 27 | 10 | 13 | 26 | 14 | 670 | 14 | 14 | 14 | 14 | 14 | 10 | 26 | 26 |
Best forecast wave conditions in Okinawa | ||||||||||||||||||||
Best forecast wave conditions in Japan | ||||||||||||||||||||
Header Global | ||||||||||||||||||||
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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.










