Surf Forecasts:
Yonabaru surf forecast from 10 Sep 2026:
- Best quality surf: Thursday 10 Sep, 9PM (local time) - 3.5ft (1.1m), 9s period, N swell with glassy winds.
- Most powerful swell: Wednesday 16 Sep, 12AM (local time) - 5ft (1.5m), 10s period, E swell with 423 kJ wave energy.
- Next surfable swell (1★+): Thursday 10 Sep, 9PM (local time) - 3.5ft (1.1m), 9s period with N 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 (Sep 10) at 9PM. The primary swell is predicted to be 1.1m and 9s period with a secondary swell of 0.4m and 9s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Yonabaru in the next 16 days are 1.5m 10s and forecast to arrive on Wednesday (Sep 16) at 12AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.7m 6s period and expected on Wednesday (Sep 16) at 12PM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9PM (Thu 10th Sep) | 3.5ft (1.1m) 9s |
| Best Surf | 9PM (Thu 10th Sep) | 3.5ft (1.1m) 9s |
| Most Powerful | 12AM (Wed 16th Sep) | 5ft (1.5m) 10s |
Table - best surf conditions forecast for Yonabaru over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s take a look at what’s on offer for the breaks around here.
To be straight with you, the next week and a half is looking pretty flat and frustrating. From Thursday the 10th right through to the 18th of September, the surf is just not cooperating. We’re looking at a long stretch of mostly small, weak, and messy conditions. The swell is tiny, the period is short, and the wind is never truly on our side. It’s mostly onshore or cross-onshore, keeping things chopped up and uninviting. You’d be fighting a losing battle out there. Even the water temp is sitting at about 84°F, which is bang on average for the time of year, so no excuses there.
The real action, and the only thing worth getting excited about, kicks off on Saturday the 19th of September. We get a pulse of proper energy. The morning at Yonabaru is showing a solid 6ft of swell from the ESE, with a very long period of 18 seconds. That’s real groundswell energy pushing through (combined energy of 2246). The trade-off is the wind is a gentle cross-onshore, so it’ll be a bit choppy, but the power and shape in the water will be there. This is the standout window for the whole forecast. It’s not perfect, but it’s the best we’re going to get.
By the afternoon of the 19th, the swell jumps to 8ft, and by Sunday the 20th it’s up to 10ft and even 12ft. That’s big, powerful stuff with periods over 17 seconds — this is serious wave energy (energy values over 4000 and 6000). But the wind ramps up too, becoming a fresh cross-onshore, making it lumpy and unruly. This is expert-only territory. If you’re a beginner, stay well clear. Those waves are heavy and the conditions are not forgiving.
After that big pulse, the swell drops off quickly into Monday the 21st, and the wind howls from the NE at 31 to 37 mph. That’s a near gale, blowing the whole thing out. The surf is down to 5ft to 6ft, but it’s a mess. By the 22nd, the swell is gone, and we’re back to tiny, weak waves under 3ft, with some crazy storm-force offshore winds that make paddling out impossible. The last few days of the forecast clean up, but the swell is so small—1.0ft to 1ft—it’s not worth the effort.
So, save your energy for the 19th of September. That Saturday morning is your best shot. It’s not a glassy, perfect day, but it’s the only real surf in the whole 16-day window.
Rusty.
Short Range ForecastLight rain (total 5mm), mostly falling on Fri afternoon. Warm (max 29°C on Fri morning, min 27°C on Thu morning). Wind will be generally light. | Days 4-6 Weather SummaryModerate rain (total 16mm), heaviest on Mon afternoon. Warm (max 29°C on Tue afternoon, min 27°C on Sun night). Wind will be generally light. | ||||||||||||||||||||
Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | Tuesday 15 | Wednesday 16 | |||||||||||||||
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) | N 9 | N 9 | N 9 | N 8 | N 8 | SE 6 | SE 6 | E 14 | E 14 | E 6 | E 7 | E 7 | ESE 8 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | E 10 | E 9 | E 9 | E 9 |
Wave Graph  | |||||||||||||||||||||
 kJ | 180 | 198 | 157 | 92 | 64 | 54 | 71 | 64 | 62 | 98 | 124 | 159 | 218 | 264 | 243 | 260 | 260 | 423 | 136 | 136 | 108 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | on | cross-on | on | cross-on | on | on | on | cross-on | on | on | on | on | on | cross-on | cross-on | cross-on | cross-on | on | on |
High Tide | 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 | 9:34AM1.93m | 9:11PM2.07m | ||||||||
Low Tide | 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 | 3:12AM0.42m | 3:13PM0.91m | ||||||||
 | |  | |  | | | |  |  | | | | | | | | | |  |  | |
 | 6:11 | — | — | 6:11 | — | — | 6:11 | — | — | 6:13 | — | — | 6:13 | — | — | 6:13 | — | — | 6:13 | — | — |
 | — | 6:38 | — | — | 6:37 | — | — | 6:37 | — | — | 6:36 | — | — | 6:35 | — | — | 6:34 | — | — | 6:32 | — |
mm | — | — | 1 | — | 3 | 1 | — | — | — | 1 | 1 | 1 | 2 | 3 | 2 | 1 | 4 | 1 | 1 | — | — |
Temp °C | 28 | 28 | 28 | 29 | 28 | 28 | 28 | 28 | 27 | 28 | 28 | 27 | 28 | 28 | 27 | 28 | 29 | 27 | 29 | 28 | 27 |
Feels °C | 32 | 32 | 33 | 33 | 31 | 32 | 31 | 30 | 30 | 30 | 30 | 29 | 29 | 29 | 30 | 31 | 33 | 31 | 33 | 31 | 30 |
Swell 1 Height (m) Direction Period (s) | N 9 | N 9 | N 9 | N 8 | N 8 | N 8 | N 7 | S 7 | S 7 | E 14 | E 14 | E 13 | E 13 | E 13 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | E 9 | E 9 | E 9 |
| kJ | 180 | 198 | 157 | 92 | 64 | 42 | 26 | 27 | 34 | 61 | 62 | 56 | 55 | 54 | 243 | 260 | 260 | 227 | 136 | 136 | 108 |
Swell 2 Height (m) Direction Period (s) | SE 9 | SE 9 | SE 9 | ESE 8 | S 7 | E 15 | E 14 | N 7 | E 14 | S 7 | N 6 | N 5 | N 5 | SSW 7 | E 13 | SW 9 | SW 8 | NNW 8 | E 14 | SSE 6 | E 14 |
| kJ | 21 | 21 | 20 | 40 | 8 | 38 | 61 | 24 | 62 | 15 | 6 | 5 | 5 | 5 | 31 | 19 | 11 | 11 | 62 | 18 | 100 |
Swell 3 Height (m) Direction Period (s) | S 7 | S 7 | ESE 6 | S 7 | E 15 | S 7 | S 7 | E 14 | N 6 | N 6 | S 7 | S 6 | S 7 | N 5 | SW 9 | — | E 16 | SW 9 | NNW 7 | NNW 6 | SSE 6 |
| kJ | 8 | 8 | 8 | 8 | 39 | 4 | 8 | 64 | 13 | 7 | 8 | 7 | 4 | 2 | 12 | — | 5 | 12 | 15 | 8 | 10 |
Wind waves Height (m) Direction Period (s) | — | — | ESE 6 | SE 4 | ESE 7 | SE 6 | SE 6 | ESE 6 | E 5 | E 6 | E 7 | E 7 | ESE 8 | ESE 9 | — | — | — | E 10 | SSE 6 | — | ESE 3 |
| kJ | — | — | 24 | 6 | 48 | 54 | 71 | 56 | 43 | 98 | 124 | 159 | 218 | 264 | — | — | — | 423 | 37 | — | 3 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 14 | 14 | 10 | 10 | 27 | 10 | 26 | 14 | 14 | 14 | 14 | 14 | 607 | 47 | 607 | 51 | 51 | 47 | 10 | 10 | 10 |
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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