Surf Forecasts:
Yonabaru surf forecast from 5 Sep 2026:
- Most powerful swell: Monday 7 Sep, 12AM (local time) - 7ft (2.2m), 7s period, NNE swell with 484 kJ wave energy.
Best Forecast Surf Conditions for Yonabaru this week:
The most powerful waves expected at Yonabaru in the next 16 days are 2.2m 7s and forecast to arrive on Monday (Sep 07) at 12AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.1m 10s period and expected on Saturday (Sep 12) at 6AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 12AM (Mon 7th Sep) | 7ft (2.2m) 7s |
Table - best surf conditions forecast for Yonabaru over the next 16 days.
The Lowdown
Alright, let’s talk about Yonabaru. I’m not gonna sugarcoat it—this is a rough stretch. The 16-day window is basically a dead zone for decent surf.
The only break we’re looking at is Yonabaru, a beginner-friendly spot that’s fairly consistent and exposed to the NE. The water temp is sitting at 84°F, which is about average for the time of year, so no surprises there. But the surf quality? Mate, it’s just not there.
The 5th and 6th of September start off with a stormy feel—risk of thunderstorms and a fresh cross-offshore wind on the Saturday, but the swell is coming from the NW with a period of 9 seconds, and the combined energy is only 476 (moderate wave energy). It’s too small and onshore on Sunday. By the 7th, the wind swings to the north and the energy drops right off. We see a few bumps in the middle of the week, like the 8th with a 5ft swell from the NNW and a period of 8 seconds, but the wind is cross-shore and lumpy. The energy on the 8th morning is 378, which is moderate, but it’s just not clean enough.
From the 12th of September onward, the swell drops to 1ft with a long period of 14 seconds from the east, but the energy is weak (89 to 112). That’s a long-period groundswell, which would be better at a point or reef, but here it’s a beach break, and the wind is onshore or cross-onshore, so it’s not going to shape up. The 14th sees a bit of a pulse at 3ft, but again, the wind is cross-onshore and choppy. The energy climbs to 211, but it’s still poor.
The best you could call a standout? Honestly, there isn’t one. The 10th of September offers a window with a light breeze from the ENE and a 3ft swell from the NW, but the wind is onshore and the combined energy is a weak 128. It’s clean-ish, but the size is tiny. For a beginner, it might be a paddle, but it’s not worth a trip.
The 16th and 17th have a bit more energy from the east, but we’re talking 2ft to 3ft swells with periods of 9 to 13 seconds, and the wind is light cross-onshore. The energy is around 133 to 200, but the surf is still classed as poor. It’s a real blank run, mate. This is more normal for the area when the conditions just don’t align.
To be honest, with the significant swell on the 8th and 9th being 5ft to 5ft but with a strong, lumpy cross-shore wind, it’s more interesting for the kite surfers than us paddle guys. The setup is a beach-and-reef, and the wind is just too messy for clean waves.
So, save your energy. The forecasts can change, but right now, there’s nothing to get excited about at Yonabaru.
- Rusty
Short Range ForecastLight rain (total 8mm), mostly falling on Sat night. Warm (max 30°C on Sun morning, min 27°C on Sun afternoon). Mainly fresh winds. | Days 4-6 Weather SummaryLight rain (total 4mm), mostly falling on Tue afternoon. Warm (max 29°C on Thu afternoon, min 26°C on Tue night). Wind will be generally light. | ||||||||||||||||||||
Saturday 5 | Sunday 6 | Monday 7 | Tuesday 8 | Wednesday 9 | Thursday 10 | Friday 11 | |||||||||||||||
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) | NW 9 | N 10 | N 11 | ENE 6 | NE 5 | NNE 7 | ENE 8 | NNW 6 | N 9 | NNW 8 | N 9 | N 7 | N 7 | N 7 | N 7 | NNW 7 | NW 8 | N 9 | NNW 9 | N 8 | SE 7 |
Wave Graph  | |||||||||||||||||||||
 kJ | 440 | 164 | 57 | 195 | 124 | 484 | 57 | 156 | 175 | 326 | 347 | 209 | 155 | 127 | 80 | 47 | 73 | 169 | 55 | 51 | 178 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | on | cross-on | cross-on | cross | cross | cross-off | cross | cross | cross | cross | cross | cross | cross | cross-on | on | on | on | cross-on | cross-on |
High Tide | 2:28PM1.53m | 00:28AM1.76m | 4:15PM1.63m | 2:19AM1.75m | 5:04PM1.76m | 3:47AM1.83m | 5:37PM1.87m | 4:48AM1.96m | 6:06PM1.97m | 5:36AM2.07m | 6:32PM2.04m | 6:18AM2.16m | 6:58PM2.10m | ||||||||
Low Tide | 6:31PM1.41m | 8:32AM0.70m | 8:58PM1.41m | 9:52AM0.61m | 10:21PM1.28m | 10:47AM0.51m | 11:09PM1.12m | 11:31AM0.43m | 11:47PM0.94m | 12:08PM0.38m | 00:21AM0.77m | 12:42PM0.38m | 00:54AM0.63m | ||||||||
 | |  |  | |  | | |  | |  |  | | | | | | | | | | |
 | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — | 6:11 | — | — | 6:11 | — | — | 6:11 | — | — | 6:11 | — | — |
 | — | 6:45 | — | — | 6:44 | — | — | 6:43 | — | — | 6:42 | — | — | 6:40 | — | — | 6:38 | — | — | 6:37 | — |
mm | 2 | 2 | 3 | — | 1 | — | — | — | — | — | 1 | 1 | 1 | — | — | — | — | 1 | 3 | 1 | 1 |
Temp °C | 28 | 28 | 28 | 30 | 29 | 27 | 29 | 29 | 27 | 28 | 28 | 27 | 27 | 28 | 26 | 28 | 29 | 27 | 28 | 29 | 28 |
Feels °C | 29 | 31 | 32 | 32 | 30 | 28 | 29 | 30 | 29 | 29 | 28 | 28 | 27 | 28 | 28 | 31 | 32 | 30 | 31 | 32 | 32 |
Swell 1 Height (m) Direction Period (s) | NW 9 | WNW 7 | SSW 8 | SSW 8 | SSW 9 | E 8 | ENE 8 | ENE 9 | WNW 7 | ENE 10 | ENE 9 | S 8 | S 9 | S 8 | S 7 | NNW 7 | NW 8 | N 9 | NNW 9 | N 8 | N 8 |
| kJ | 440 | 158 | 201 | 180 | 132 | 69 | 57 | 82 | 81 | 52 | 28 | 10 | 13 | 18 | 17 | 47 | 73 | 169 | 55 | 51 | 46 |
Swell 2 Height (m) Direction Period (s) | ESE 8 | N 10 | WNW 8 | NW 8 | E 9 | S 9 | S 9 | S 8 | SSW 9 | S 8 | SSE 9 | ENE 8 | ENE 8 | ENE 7 | ESE 10 | ESE 9 | N 7 | S 7 | N 8 | NNW 9 | SSE 12 |
| kJ | 19 | 164 | 123 | 15 | 59 | 60 | 56 | 51 | 58 | 35 | 26 | 14 | 12 | 10 | 18 | 28 | 23 | 9 | 52 | 29 | 52 |
Swell 3 Height (m) Direction Period (s) | E 10 | E 7 | N 11 | NW 8 | NW 7 | E 13 | ESE 8 | SSW 9 | ENE 9 | SW 8 | SSW 8 | SSW 9 | E 9 | SE 10 | ENE 7 | S 7 | ESE 9 | SE 9 | SE 9 | S 7 | E 15 |
| kJ | 17 | 8 | 57 | 9 | 14 | 3 | 24 | 29 | 47 | 9 | 6 | 8 | 15 | 15 | 5 | 9 | 32 | 13 | 22 | 8 | 39 |
Wind waves Height (m) Direction Period (s) | SW 8 | SSW 8 | E 6 | ENE 6 | NE 5 | NNE 7 | NNW 6 | NNW 6 | N 9 | NNW 8 | N 9 | N 7 | N 7 | N 7 | N 7 | — | — | ENE 3 | E 3 | E 4 | SE 7 |
| kJ | 419 | 287 | 7 | 195 | 124 | 484 | 122 | 156 | 175 | 326 | 347 | 209 | 155 | 127 | 80 | — | — | 1 | 6 | 9 | 178 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 820 | 670 | 727 | 765 | 727 | 727 | 670 | 792 | 13 | 670 | 670 | 48 | 756 | 670 | 14 | 17 | 13 | 10 | 18 | 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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