Surf Forecasts:
Yonabaru surf forecast from 14 Sep 2026:
- Most powerful swell: Sunday 20 Sep, 3PM (local time) - 10ft (3.0m), 16s period, E swell with 3,741 kJ wave energy.
Best Forecast Surf Conditions for Yonabaru this week:
The most powerful waves expected at Yonabaru in the next 16 days are 3.0m 16s and forecast to arrive on Sunday (Sep 20) 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 0.3m 8s period and expected on Saturday (Sep 19) at 9AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 3PM (Sun 20th Sep) | 10ft (3.0m) 16s |
Table - best surf conditions forecast for Yonabaru over the next 16 days.
The Lowdown
Alright, folks, Rusty here. Let's have a look at what’s cookin’ for Yonabaru over the next couple of weeks.
Alright, straight up, the next week and a half is a write-off for any decent paddle surfing. We’re looking at a long, flat spell with nothing worth paddling out for. The water temp at the start sits at 84°F, which is bang average for this time of year, so no surprises there.
The first real glimmer of something with a bit of push arrives on Saturday, September 19th. A long-period groundswell from the ESE starts showing up, but it’s got a bit of a problem. The swell runs into moderate cross-shore winds, which will chop things up. The combined wave energy is strong, building quickly. Wave heights around 6ft. It’s raw power, but the quality is questionable, hence the low scores.
Sunday, September 20th is the big one in terms of size, but it’s not clean. We’re looking at 8ft to 10ft swell from the east, with a very long period of 16 seconds. The combined energy is huge, but the fresh cross-shore winds will make it lumpy and tough. This is expert-only territory, and even then, the chop will be a battle. For a spot like Yonabaru, a beach break, that long-period east swell might bend it straight, making it a bit of a mess.
Interestingly, by Monday, September 21st, the winds shift to a clean cross-off from the NNW. The swell is dropping, at 6ft in the morning and 5ft in the afternoon, but it’s clean. The combined energy is still strong. This is the absolute standout of the whole forecast – the window where you get decent, clean waves before it all fades. This is for experienced surfers, though, as 6ft is pushing it for beginners.
After that, it’s back to the doldrums. The swell drops quickly through the 22nd and is all but gone by the 23rd, with weak energy and small, cleaned-up waves. The rest of the run through to the 29th is a mix of tiny swell and ugly onshore winds, with nothing to get excited about.
So, to wrap it up: if you’ve got a board, you’re waiting for Monday, September 21st at Yonabaru. That’s the best of a rough bunch. The 19th and 20th are for the brave or the kite foilers, because that cross-shore wind and big swell is a kiter’s dream.
Rusty.
Short Range ForecastModerate rain (total 14mm), heaviest on Mon afternoon. Warm (max 29°C on Tue afternoon, min 26°C on Mon night). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 4mm), mostly falling on Sat afternoon. Warm (max 28°C on Thu morning, min 26°C on Thu night). Wind will be generally light. | ||||||||||||||||||||
Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | Saturday 19 | Sunday 20 | |||||||||||||||
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) | ESE 8 | ESE 9 | ESE 9 | ESE 9 | E 9 | E 9 | ESE 10 | ESE 9 | ESE 9 | ESE 9 | E 9 | E 13 | E 9 | E 9 | ESE 16 | ESE 17 | ESE 17 | E 16 | E 16 | E 16 | E 14 |
Wave Graph  | |||||||||||||||||||||
 kJ | 147 | 158 | 162 | 166 | 176 | 180 | 150 | 144 | 113 | 108 | 103 | 87 | 78 | 54 | 90 | 1057 | 1927 | 2259 | 3118 | 3741 | 2346 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross | cross | cross | cross | cross | cross-off |
High Tide | 8:15PM2.15m | 8:52AM2.06m | 8:43PM2.13m | 9:34AM1.93m | 9:11PM2.07m | 10:23AM1.77m | 9:44PM1.99m | 11:28AM1.62m | 10:24PM1.88m | 1:11PM1.54m | 11:24PM1.76m | 3:18PM1.59m | 1:13AM1.68m | ||||||||
Low Tide | 2:14PM0.62m | 2:35AM0.41m | 2:43PM0.76m | 3:12AM0.42m | 3:13PM0.91m | 3:55AM0.48m | 3:45PM1.07m | 4:45AM0.57m | 4:23PM1.23m | 5:52AM0.66m | 5:28PM1.37m | 7:25AM0.71m | 7:52PM1.42m | ||||||||
 | |  | |  | | | |  | | | | |  | | | |  | | | | |
 | 6:13 | — | — | 6:13 | — | — | 6:13 | — | — | 6:15 | — | — | 6:15 | — | — | 6:15 | — | — | 6:16 | — | — |
 | — | 6:35 | — | — | 6:34 | — | — | 6:32 | — | — | 6:31 | — | — | 6:30 | — | — | 6:29 | — | — | 6:28 | — |
mm | 2 | 2 | 4 | 2 | — | 2 | 1 | 1 | — | 1 | — | — | — | — | — | — | 3 | — | — | — | — |
Temp °C | 28 | 28 | 27 | 27 | 29 | 27 | 28 | 28 | 27 | 28 | 28 | 27 | 28 | 28 | 26 | 28 | 28 | 27 | 28 | 28 | 27 |
Feels °C | 30 | 30 | 30 | 31 | 33 | 30 | 32 | 31 | 30 | 32 | 31 | 30 | 30 | 30 | 28 | 30 | 30 | 29 | 28 | 28 | 26 |
Swell 1 Height (m) Direction Period (s) | ESE 8 | ESE 9 | ESE 9 | ESE 9 | E 9 | E 9 | ESE 10 | ESE 9 | ESE 9 | ESE 9 | E 9 | E 9 | E 9 | E 9 | E 9 | ESE 17 | ESE 17 | E 16 | E 16 | E 16 | E 14 |
| kJ | 147 | 158 | 162 | 166 | 176 | 180 | 150 | 144 | 113 | 108 | 103 | 78 | 78 | 54 | 54 | 1057 | 1927 | 2259 | 3118 | 3741 | 2346 |
Swell 2 Height (m) Direction Period (s) | E 13 | E 13 | E 13 | E 12 | NNW 6 | NNW 6 | NNW 6 | NNW 7 | N 7 | NNW 7 | E 13 | N 7 | N 7 | N 7 | ESE 16 | S 8 | S 8 | N 9 | S 8 | S 8 | S 8 |
| kJ | 55 | 54 | 54 | 48 | 11 | 10 | 21 | 30 | 34 | 26 | 84 | 21 | 25 | 15 | 90 | 12 | 12 | 15 | 5 | 5 | 5 |
Swell 3 Height (m) Direction Period (s) | N 5 | N 5 | NNW 6 | NNW 6 | SW 8 | E 15 | E 14 | E 14 | E 14 | E 14 | NNW 6 | E 13 | E 12 | E 12 | E 12 | SSE 8 | S 8 | S 8 | — | — | — |
| kJ | 4 | 4 | 6 | 11 | 3 | 17 | 64 | 59 | 100 | 92 | 12 | 87 | 47 | 45 | 44 | 22 | 21 | 11 | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | ENE 3 | — | — | ENE 4 | — | — | N 4 | N 4 | N 4 | N 4 | N 5 | NNW 7 | N 8 |
| kJ | — | — | — | — | — | — | — | — | 2 | — | — | 5 | — | — | 6 | 9 | 9 | 25 | 35 | 54 | 88 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 10 | 10 | 17 | 10 | 17 | 17 | 14 | 14 | 10 | 10 | 14 | 10 | 14 | 995 | 14 | 756 | 999 | 607 | 999 | 792 | 791 |
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.
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