Yonabaru Surf Break

Lat Long: 26.20° N 127.76° E

Yonabaru Surf Forecast and Surf Report

Issued: 8 am 15 Sep 2026 (local time)

Forecast update in  hr  min

Today's Yonabaru sea temperature is
29.1°C
0.7° 

Yonabaru surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


Yonabaru surf forecast from 15 Sep 2026:

  • Most powerful swell: Sunday 20 Sep, 3PM (local time) - 10ft (3.0m), 15s period, E swell with 3,851 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 15s and forecast to arrive on Sunday (Sep 20) at 3PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 8s period and expected on Saturday (Sep 19) at 3AM.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful 3PM (Sun 20th Sep)10ft (3.0m) 15s

Table - best surf conditions forecast for Yonabaru over the next 16 days.


The Lowdown

G’day, Rusty here. Alright, let’s have a look at what’s on the cards for Yonabaru over the next couple of weeks. To be straight with you, the water temp is sitting at a warm 84°, which is about 1° warmer than average for this time of year – pretty normal, nothing to write home about.

First up, the early part of the forecast is a bit of a write-off. From now and right through until Friday the 18th, it’s all poor surf conditions. We’re looking at weak, inconsistent 2ft to 3ft of ESE swell with short periods around 9 seconds, and the wind is coming from the NE or NNE, keeping things cross-onshore and choppy. The combined swell energy is weak, sitting between 115 and 238, so honestly, don’t bother paddling out – it’s flat and messy.

Saturday the 19th shows a bit of a pulse. Saturday morning we see 3ft of ESE swell, but the period jumps up to a very long 15 seconds – that’s a proper groundswell. The combined energy cranks to 453, so there’s some juice in the water, but the wind is cross-shore from the N, and the waves are labelled marginal. By Saturday afternoon, the swell lifts to 5ft from the E, energy hits 1006, but the wind goes cross-onshore. It’s looking ordinary, but there’s a hint of something building.

Now, Sunday the 20th is where things start to get interesting. By Sunday afternoon, we’ve got a solid 10ft of E swell with that same long 15-second period, and the combined energy is massive at 3851. The wind swings to a clean cross-offshore from the N, so it’s going to be glassy and well-shaped. That said, 10ft is big – it’s getting into expert territory, and this is a fairly exposed beginner break, so only for the experienced crew. Still, this is a standout window for the whole period if you’ve got the skills.

Monday the 21st keeps the momentum going with 7ft of E swell in the morning and 6ft in the afternoon, both with 14-second periods and clean cross-off winds from the NNW. Energy is still strong between 1696 and 2289. Again, it’s big, but clean. The swell direction is straight out of the E, which lines up with the break’s optimum NE direction? Well, not perfect, but close enough.

Tuesday the 22nd sees the size drop to 5ft to 6ft from the NNW and N, period shortening to 10 seconds, but still with clean cross-off winds. Energy drops to around 734-780, so it’s a lot more manageable – maybe even okay for intermediate surfers if they’re feeling confident.

After that, from Wednesday the 23rd through to Friday the 25th, things fade. Swell drops to 3ft and under, periods drop to 8-9 seconds, and the energy falls below 252. Wind stays cross or cross-off, but it’s just not enough to get excited about.

Then we get a little glimmer on Saturday the 26th. Saturday afternoon shows 3ft of ESE swell with a lovely 12-second period and clean cross-off breeze. Energy is 560, and it’s labelled as “expect good surf conditions.” That’s a decent little window for longboarders or fun small-wave gear.

But the real monster arrives Sunday the 27th. The afternoon sees 10ft of SE swell with a 15-second period, clean cross-off wind, and combined energy of 3477. The forecast says “excellent surf conditions for experienced surfers.” This is another standout, but again – big waves, not for the faint-hearted. The SE direction isn’t perfect for the break’s optimum NE, but with that much power and clean conditions, it’ll still fire.

Finally, Monday the 28th through Wednesday the 30th gets absolutely thumping. From Monday morning, we’re looking at 13ft to 23ft of SE swell, periods of 14-16 seconds, and combined energy going through the roof – from 7411 all the way up to 34094. But here’s the kicker: the forecast keeps saying “wind and tide favorable, but the swell is predicted to be too big for this break.” This is a beginner spot, and these sizes are genuinely dangerous for anyone but the most elite big-wave chargers. Not a good call for a normal surf.

So, to sum it up: if you’re an expert, mark your calendar for Sunday the 20th afternoon, or Sunday the 27th afternoon. Those are your best, clean, big-wave sessions. For the rest of us, Saturday the 26th afternoon is the best small-wave option with clean conditions.

Remember, the early stuff is dead, and the final few days are just too big for this location. Stay safe out there.

Rusty.

Short Range Forecast

Moderate rain (total 18mm), heaviest on Tue morning. Warm (max 28°C on Tue morning, min 26°C on Tue night). Wind will be generally light.

Days 4-6 Weather Summary

Light rain (total 4mm), mostly falling on Fri afternoon. Warm (max 28°C on Fri morning, min 25°C on Sun night). Winds increasing (light winds from the NE on Fri morning, fresh winds from the N by Sun afternoon).

Tuesday
15
Wednesday
16
Thursday
17
Friday
18
Saturday
19
Sunday
20
Monday
21
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
0
0
0
0
0
0
0
0
0
0
0
0
1
0
2
2
2
1
2
2
2
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1
ESE
9
1
E
9
1
E
9
0.9
ESE
10
0.9
ESE
9
0.8
ESE
9
0.8
ESE
9
0.8
E
9
0.5
E
13
0.6
E
9
0.6
E
9
0.7
E
9
0.8
ESE
15
1.5
E
15
2.2
E
14
2.5
E
15
3
E
15
2.5
E
14
2.2
E
14
1.8
ENE
14
1.9
NNW
9
Wave Graph
Metric surfscale
Energy kJ
166
176
180
150
144
113
108
103
84
55
54
78
308
997
1945
2629
3851
2506
1875
1288
547
Wind (km/h)
10
NE
10
NE
10
NE
10
NNE
10
NE
10
NE
15
NE
10
NE
10
NE
10
NE
15
NNE
10
NNE
15
N
15
NE
15
NNE
25
N
25
N
25
N
25
NNW
30
NNW
25
NNW
Wind State
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross
cross-on
cross
cross-on
cross-on
cross
cross-off
cross
cross-off
cross-off
cross-off
High Tide
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
4:22PM1.70m
Low Tide
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
8:59AM0.67m
9:42PM1.30m
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
clear
thunderstorm
clear
clear
thunderstorm
clear
part cloud
clear
part cloud
part cloud
part cloud
cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:13
6:13
6:15
6:15
6:15
6:16
6:16
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:34
6:32
6:31
6:30
6:29
6:28
6:27
 mm
3
2
3
2
3
1
1
2
1
2
2
Temp °C
28
28
27
28
28
26
27
28
26
28
28
26
28
28
26
28
28
26
27
27
26
Feels °C
31
31
31
31
32
29
30
31
29
32
31
29
31
30
28
29
28
24
25
25
24
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
Map placeholder
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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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