Surf Forecasts:
Yonabaru surf forecast from 13 Sep 2026:
- Most powerful swell: Sunday 20 Sep, 6AM (local time) - 8ft (2.4m), 16s period, E swell with 2,900 kJ wave energy.
Best Forecast Surf Conditions for Yonabaru this week:
The most powerful waves expected at Yonabaru in the next 16 days are 2.4m 16s and forecast to arrive on Sunday (Sep 20) at 6AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.0m 4s period and expected on Saturday (Sep 19) at 6PM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 6AM (Sun 20th Sep) | 8ft (2.4m) 16s |
Table - best surf conditions forecast for Yonabaru over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let's talk about what's cookin'. The next week and a half is gonna test your patience – a long stretch of junk before we finally see some life.
We're talkin' about Yonabaru, and the first real chance to score doesn't show up until Saturday, September 19th. Everything before that, right through Friday the 18th, is just poor surf with messy onshore breezes and weak, tiny waves. Not worth the effort.
Now, Saturday the 19th – that's the day. The afternoon session is the one to chase. We've got a clean 6ft groundswell out of the ESE with a super long period of 17 seconds. The wind is a clean cross-offshore from the NNW, which will put a nice face on 'em. Water temp is a warm 84°, right where it should be for this time of year. The combined swell energy is crankin' at 2114 – you'll feel that raw power. Mark it down: Saturday afternoon is your best bet.
Sunday the 20th keeps the size up with 8 to 8ft swell from the E, but the period backs off a touch to 15-16 seconds. The wind is more cross or cross-off, so it won't be as pristine as Saturday. This is a big, powerful wave – over 8ft at times, so only for the experienced crew. The energy is very strong at 3133.
Monday the 21st sees the swell drop to 5-6ft with clean cross-off winds, but the energy drops into the moderate range (993-1350). It's doable, but not the main event.
From Tuesday the 22nd on, it's back to mostly small, weak, and messy. There's a little blip on Sunday the 27th afternoon – glassy conditions with a 3ft ESE swell, period of 11 seconds, and moderate energy at 432. It'll be clean and small, good for a cruisy log session, but nothing special.
So here's the plan: wait out the dry spell, and be on the water Saturday the 19th afternoon. That's the best wave we're gonna see.
Rusty.
Short Range ForecastModerate rain (total 11mm), heaviest on Tue night. Warm (max 29°C on Sun afternoon, min 26°C on Tue night). Wind will be generally light. | Days 5-7 Weather SummaryLight rain (total 8mm), mostly falling on Wed night. Warm (max 29°C on Wed afternoon, min 26°C on Wed night). Wind will be generally light. | |||||||||||||||||||
Sun 13 | Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | Saturday 19 | ||||||||||||||
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) | E 7 | E 8 | ESE 8 | ESE 9 | ESE 9 | ESE 9 | E 9 | E 9 | ESE 10 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | E 13 | E 12 | E 9 | ESE 20 | ESE 17 | ESE 17 | E 16 |
Wave Graph  | ||||||||||||||||||||
 kJ | 114 | 203 | 147 | 158 | 158 | 169 | 180 | 176 | 150 | 144 | 141 | 108 | 106 | 84 | 52 | 54 | 221 | 1057 | 2111 | 2541 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | on | on | cross-on | on | cross-on | cross-on | on | cross-on | cross-on | on | on | cross-on | cross-on | cross-on | cross | cross-on | cross | cross-off | cross |
High Tide | 7:49PM2.16m | 8:13AM2.16m | 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 | |||||||
Low Tide | 2:00AM0.44m | 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 | ||||||||
 |  |  | |  | | | |  | | | | | | | |  | | | | |
 | — | — | 6:13 | — | — | 6:13 | — | — | 6:13 | — | — | 6:15 | — | — | 6:15 | — | — | 6:15 | — | — |
 | 6:36 | — | — | 6:35 | — | — | 6:34 | — | — | 6:32 | — | — | 6:31 | — | — | 6:30 | — | — | 6:29 | — |
mm | 2 | 1 | — | 1 | 1 | 1 | 1 | 4 | — | — | 2 | 2 | 1 | 2 | — | 1 | — | — | — | — |
Temp °C | 29 | 27 | 28 | 29 | 27 | 28 | 29 | 27 | 29 | 29 | 27 | 28 | 29 | 27 | 28 | 28 | 27 | 28 | 28 | 27 |
Feels °C | 31 | 29 | 31 | 31 | 29 | 31 | 33 | 30 | 32 | 32 | 30 | 31 | 32 | 30 | 31 | 30 | 30 | 30 | 29 | 29 |
Swell 1 Height (m) Direction Period (s) | E 14 | ESE 8 | ESE 8 | ESE 9 | ESE 9 | ESE 9 | E 9 | E 9 | ESE 10 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | E 9 | E 8 | E 9 | E 8 | ESE 17 | ESE 17 | E 16 |
| kJ | 62 | 151 | 147 | 158 | 158 | 169 | 180 | 176 | 150 | 144 | 141 | 108 | 106 | 74 | 52 | 54 | 51 | 1057 | 2111 | 2541 |
Swell 2 Height (m) Direction Period (s) | N 6 | E 13 | E 13 | E 13 | E 13 | E 12 | NNW 6 | NNW 6 | NNW 6 | NNW 7 | NNW 7 | NNW 7 | E 13 | E 13 | N 7 | E 12 | ESE 20 | E 11 | S 8 | S 8 |
| kJ | 3 | 56 | 55 | 54 | 54 | 48 | 7 | 15 | 27 | 35 | 26 | 25 | 84 | 84 | 15 | 45 | 221 | 89 | 11 | 5 |
Swell 3 Height (m) Direction Period (s) | S 6 | N 5 | N 5 | N 5 | NW 6 | NNW 6 | SW 8 | E 15 | E 14 | E 14 | E 14 | E 14 | NNW 6 | N 7 | E 12 | N 7 | E 12 | SE 11 | SE 8 | — |
| kJ | 3 | 8 | 5 | 2 | 1 | 8 | 3 | 17 | 64 | 60 | 100 | 92 | 13 | 23 | 47 | 14 | 44 | 30 | 3 | — |
Wind waves Height (m) Direction Period (s) | E 7 | E 8 | — | — | — | — | — | — | — | — | ENE 3 | — | — | NNE 3 | — | — | N 4 | N 4 | N 4 | N 5 |
| kJ | 114 | 203 | — | — | — | — | — | — | — | — | 3 | — | — | 1 | — | — | 7 | 16 | 21 | 57 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 14 | 14 | 10 | 10 | 10 | 17 | 17 | 17 | 10 | 14 | 10 | 10 | 14 | 10 | 14 | 670 | 670 | 670 | 670 | 607 |
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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