
Surf Forecasts:
Yonabaru surf forecast from 8 Sep 2026:
- Most powerful swell: Tuesday 8 Sep, 6PM (local time) - 5ft (1.6m), 9s period, N swell with 384 kJ wave energy.
Best Forecast Surf Conditions for Yonabaru this week:
The most powerful waves expected at Yonabaru in the next 16 days are 1.6m 9s and forecast to arrive on Tuesday (Sep 08) at 6PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 7s period and expected on Sunday (Sep 13) at 3AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 6PM (Tue 8th Sep) | 5ft (1.6m) 9s |
Table - best surf conditions forecast for Yonabaru over the next 16 days.
The Lowdown
Alright, Rusty here, checking in on the local scene for Yonabaru.
It’s a tough stretch, I won’t sugarcoat it. The first week and a half is a write-off. From Tuesday morning, September 8th through most of the second week, there’s nothing worth paddling out for. The wind is either gusty cross-shore or smashing straight onshore, and the swell is small, weak, and messy. We’re looking at a solid 9-day lull with no surf on offer until the following Monday at the earliest — the waves are just not doing anything for us.
The real interest, and the only genuine standout of this entire outlook, arrives much later. On Monday, September 21st, things finally wake up. We’ve got a clean cross-off wind from the NNW blowing 12-16 mph and a substantial groundswell filling in. The morning sees a 8ft swell from the ESE with a very long 18-second period. That’s a deep ocean pulse — the combined swell energy is massive (3537), so you’ll really feel the power. By the afternoon it nudges up to 8ft with the same long period and energy hitting just under 4000. This is proper, powerful swell, and with that cross-off breeze, it’ll be clean and well-shaped for those surfacing at Yonabaru. But don't be fooled, at over 8ft that’s expert territory — leave the beginners and longboarders on the beach. Still, for the experienced crew, this is the best call of the whole 16 days.
Before that, on Sunday, September 20th, there’s a very late afternoon possibility: a long period ESE groundswell of 3ft at 19 seconds with a cross-off wind. Clean, yes, and the energy dropdown is big (797), but it’s a marginal call and the size is small — one for the longboarders if you’re keen on a late glassy session.
The wave window closes again after that, with diminishing swell but still some potential. Wednesday morning, September 23rd, could be pleasant if you’re chasing small clean waves. The swell drops to 4ft from the E at a 13-second period, and the wind is dead calm — glassy conditions. The water temp is 84°, which is about average for this time of year so the water is nice and warm, no surprises.
But overall, this forecast is a waiting game. The middle is dead, then the last Monday and Tuesday bring the goods, but they are a long way off. Lock in September 21st in your calendar — that’s your best shot for a proper session.
Stay patient and paddled out.
Rusty
Short Range ForecastLight rain (total 3mm), mostly falling on Thu night. Warm (max 28°C on Tue morning, min 26°C on Tue night). Wind will be generally light. | Days 4-6 Weather SummaryModerate rain (total 10mm), heaviest on Fri afternoon. Warm (max 29°C on Fri morning, min 26°C on Sat night). Wind will be generally light. | ||||||||||||||||||||
Tuesday 8 | Wednesday 9 | Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | Monday 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) | NNW 8 | NNW 9 | NNW 8 | N 8 | N 8 | N 8 | N 9 | N 9 | N 9 | N 9 | NNW 8 | NNW 8 | ESE 6 | SE 6 | SE 7 | E 6 | E 14 | E 6 | E 8 | E 8 | ESE 9 |
Wave Graph | |||||||||||||||||||||
344 | 417 | 232 | 245 | 251 | 208 | 270 | 241 | 207 | 154 | 92 | 65 | 109 | 94 | 135 | 68 | 97 | 95 | 135 | 147 | 237 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross | cross | cross-off | cross | cross | cross | on | on | on | cross-on | on | on | on | cross-on | on | on | on | on | on |
High Tide | 5:37PM1.87m | 4:48AM1.96m | 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 | ||||||||
Low Tide | 10:47AM0.51m | 11:09PM1.12m | 11:31AM0.43m | 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 | |||||||
6:11 | — | — | 6:11 | — | — | 6:11 | — | — | 6:11 | — | — | 6:11 | — | — | 6:13 | — | — | 6:13 | — | — | |
— | 6:42 | — | — | 6:40 | — | — | 6:38 | — | — | 6:37 | — | — | 6:37 | — | — | 6:36 | — | — | 6:35 | — | |
mm | — | — | — | — | — | — | — | — | 3 | 2 | 4 | 2 | — | — | — | 1 | 1 | — | 1 | 4 | 2 |
Temp °C | 28 | 28 | 27 | 28 | 28 | 27 | 28 | 28 | 27 | 29 | 28 | 28 | 28 | 28 | 27 | 27 | 27 | 27 | 27 | 27 | 27 |
Feels °C | 29 | 28 | 28 | 29 | 29 | 29 | 31 | 32 | 31 | 33 | 31 | 31 | 31 | 30 | 29 | 28 | 29 | 29 | 28 | 29 | 29 |
Swell 1 Height (m) Direction Period (s) | SW 8 | S 8 | S 8 | S 8 | S 7 | ESE 9 | N 9 | N 9 | N 9 | N 9 | ESE 6 | NNW 8 | NNW 8 | N 8 | N 7 | SSE 7 | S 8 | N 6 | E 8 | E 8 | E 13 |
15 | 12 | 10 | 10 | 10 | 28 | 270 | 241 | 207 | 154 | 61 | 65 | 79 | 55 | 24 | 52 | 49 | 18 | 135 | 147 | 54 | |
Swell 2 Height (m) Direction Period (s) | SSE 8 | E 9 | ENE 8 | E 9 | E 9 | S 7 | ESE 9 | ESE 9 | ESE 9 | ESE 6 | NNW 8 | E 15 | E 14 | E 14 | E 14 | E 14 | E 14 | E 13 | E 13 | N 6 | S 7 |
14 | 14 | 14 | 14 | 14 | 9 | 32 | 46 | 45 | 14 | 92 | 38 | 61 | 64 | 62 | 61 | 97 | 56 | 55 | 9 | 8 | |
Swell 3 Height (m) Direction Period (s) | E 9 | SW 8 | SSW 9 | SE 10 | SE 10 | SW 8 | S 7 | S 7 | S 7 | ESE 9 | S 7 | S 7 | S 7 | SSE 8 | ESE 10 | NNW 7 | N 7 | S 8 | S 7 | E 13 | SSW 11 |
14 | 2 | 8 | 16 | 16 | 3 | 8 | 9 | 9 | 30 | 9 | 4 | 3 | 13 | 18 | 15 | 14 | 18 | 8 | 54 | 11 | |
Wind waves Height (m) Direction Period (s) | NNW 8 | NNW 9 | NNW 8 | N 8 | N 8 | N 8 | — | — | — | ESE 2 | — | ESE 6 | ESE 6 | SE 6 | SE 7 | E 6 | E 6 | E 6 | N 6 | — | ESE 9 |
344 | 417 | 232 | 245 | 251 | 208 | — | — | — | 1 | — | 55 | 109 | 94 | 135 | 68 | 88 | 95 | 6 | — | 237 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 785 | 670 | 607 | 670 | 670 | 670 | 14 | 14 | 10 | 10 | 18 | 10 | 18 | 26 | 14 | 14 | 14 | 14 | 14 | 17 | 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.










