Surf Forecasts:
Yonabaru surf forecast from 21 Aug 2026:
- Best quality surf: Tuesday 25 Aug, 6AM (local time) - 11ft (3.5m), 18s period, ESE swell with cross-onshore winds.
- Most powerful swell: Tuesday 25 Aug, 12PM (local time) - 13ft (4.0m), 17s period, E swell with 9,389 kJ wave energy.
- Next surfable swell (1★+): Tuesday 25 Aug, 6AM (local time) - 11ft (3.5m), 18s period with ESE swell.
Best Forecast Surf Conditions for Yonabaru this week:
The surf forecast for Yonabaru over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Tuesday (Aug 25) at 6AM. The primary swell is predicted to be 3.5m and 18s period. The wind is predicted to be cross-onshore as the swell arrives.
The most powerful waves expected at Yonabaru in the next 16 days are 4.0m 17s and forecast to arrive on Tuesday (Aug 25) at 12PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 3.5m 11s period and expected on Wednesday (Aug 26) at 12PM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6AM (Tue 25th Aug) | 11ft (3.5m) 18s |
| Best Surf | 6AM (Tue 25th Aug) | 11ft (3.5m) 18s |
| Most Powerful | 12PM (Tue 25th Aug) | 13ft (4.0m) 17s |
Table - best surf conditions forecast for Yonabaru over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s have a look at the next couple of weeks for Yonabaru. It’s a bit of a mixed bag, so let’s break it down day by day.
Right off the bat, the start of this stretch is pretty grim. This Saturday and Sunday are a total write-off. We're looking at tiny, weak surf with fresh cross-onshore winds and the real risk of thunderstorms. The swell energy is pitiful, reading at 20 and 26 on Saturday, and it’s not much better on Sunday with 51 and 79. Not even worth paddling out for. The water temp is about average for this time of year, so no surprises there, but you won’t be in it long.
The beginning of next week isn't much better. Monday sees the swell start to build but it’s still messy with moderate onshore winds. By Monday afternoon, the swell jumps to 4.9ft with a long 17-second period, and the energy reads a strong 1364, but the conditions are just poor. Tuesday is where things get interesting, but not for the faint of heart. We've got a big pulse of swell arriving—11.5ft! The energy readings are massive, hitting 7889 in the morning. The wind is favorable (NNE cross-on in the AM, then a clean cross-shore from the N in the PM), but this is way too big for a beginner spot like Yonabaru. This is only for the experts, and even then, it’s going to be a wild one.
Now, for the real standout. Wednesday the 26th is the day. The swell drops to a much more manageable 6.6ft, the wind swings offshore from the W, and it’s clean. The energy is still solid at 1217, and the period is a nice 11 seconds. This is the best on offer for the whole period. The swell direction is from the N, which isn't the optimum NE for the break, but the clean conditions and solid size will make up for it. Thursday the 27th is still fun—4.9ft and clean with offshore winds, but the energy is a bit lower at 630 and 576. A good follow-up day, but Wednesday is the pick.
After that, things fall apart again. From Friday the 28th onwards, it's a story of onshore winds, chop, and dropping energy. We get a few days with some size, but the wind is never right, coming from the E and NE. The swell direction swings around, but the conditions are generally poor. The 31st and the 1st have some questionable tides with 5.2ft to 5.6ft of swell, but the cross-onshore wind ruins it. Early September sees a few pulses of energy, but the wind stays on it, blowing 20 to 30 km/h from the NE, making it lumpy and ugly.
Honestly, the middle of next week is a bit of a washout. There’s no real window of clean surf until that Wednesday, and even then, the swell direction is a bit off. If you can only get out once, make it Wednesday morning the 26th. Check the tides, but the forecast looks good for a few clean ones.
Alright, that’s the long and short of it. Stay stoked.
Short Range ForecastLight rain (total 6mm), mostly falling on Sat morning. Warm (max 29°C on Sun afternoon, min 27°C on Sat night). Mainly fresh winds. | Days 4-6 Weather SummaryModerate rain (total 10mm), heaviest on Tue afternoon. Warm (max 30°C on Tue morning, min 27°C on Tue night). Mainly fresh winds. | ||||||||||||||||||||
Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | Friday 28 | |||||||||||||||
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) | ENE 9 | SE 10 | ESE 10 | ENE 9 | ESE 13 | SE 12 | SE 15 | ESE 16 | ESE 17 | ESE 17 | E 16 | E 13 | NNE 11 | E 10 | ESE 8 | ESE 8 | ESE 8 | ESE 9 | ESE 8 | ESE 8 | ESE 7 |
Wave Graph | |||||||||||||||||||||
26 | 27 | 35 | 27 | 35 | 38 | 220 | 1292 | 4138 | 8846 | 8212 | 1584 | 563 | 68 | 57 | 90 | 77 | 199 | 87 | 85 | 73 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-on | cross-on | on | on | on | on | cross-on | cross | cross | cross-off | off | cross-off | off | cross-off | cross-off | cross-off | cross | cross-on | on |
High Tide | 3:38PM1.57m | 1:38AM1.79m | 4:55PM1.69m | 3:12AM1.83m | 5:37PM1.81m | 4:23AM1.93m | 6:10PM1.92m | 5:17AM2.04m | 6:38PM2.01m | 6:03AM2.14m | 7:05PM2.07m | 6:44AM2.21m | 7:32PM2.12m | ||||||||
Low Tide | 7:49PM1.42m | 9:29AM0.65m | 9:46PM1.39m | 10:33AM0.53m | 10:52PM1.26m | 11:22AM0.42m | 11:37PM1.12m | 12:03PM0.34m | 00:15AM0.96m | 12:39PM0.31m | 00:49AM0.82m | 1:12PM0.32m | 1:22AM0.69m | ||||||||
6:03 | — | — | 6:03 | — | — | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — | |
— | 6:59 | — | — | 6:58 | — | — | 6:57 | — | — | 6:55 | — | — | 6:54 | — | — | 6:53 | — | — | 6:52 | — | |
mm | 1 | — | 3 | — | — | — | 1 | 1 | — | — | 3 | 2 | — | — | — | — | 3 | 2 | 2 | 1 | 1 |
Temp °C | 28 | 28 | 27 | 28 | 29 | 27 | 28 | 28 | 27 | 30 | 30 | 29 | 29 | 29 | 28 | 29 | 28 | 28 | 29 | 29 | 28 |
Feels °C | 28 | 29 | 29 | 30 | 31 | 29 | 30 | 30 | 29 | 33 | 33 | 31 | 31 | 31 | 31 | 30 | 29 | 29 | 31 | 31 | 32 |
Swell 1 Height (m) Direction Period (s) | ENE 9 | E 9 | SSW 10 | SSW 10 | SSW 10 | SSW 9 | SSW 9 | ESE 16 | ESE 17 | ESE 17 | E 16 | E 13 | NNE 11 | E 10 | WNW 11 | W 11 | W 11 | W 11 | W 11 | SSW 8 | SSW 9 |
26 | 6 | 657 | 591 | 363 | 199 | 165 | 1292 | 4138 | 8846 | 8212 | 1584 | 563 | 68 | 1665 | 1636 | 1276 | 599 | 317 | 169 | 157 | |
Swell 2 Height (m) Direction Period (s) | ENE 9 | SE 10 | ESE 10 | SE 10 | ESE 13 | E 9 | SE 15 | SSW 9 | SSW 9 | SSW 8 | SSW 9 | SSW 9 | E 11 | E 14 | ESE 8 | SSE 8 | ESE 8 | ESE 9 | ESE 8 | ESE 8 | ESE 7 |
16 | 27 | 35 | 15 | 35 | 15 | 220 | 121 | 67 | 48 | 70 | 124 | 119 | 34 | 57 | 115 | 77 | 199 | 87 | 85 | 73 | |
Swell 3 Height (m) Direction Period (s) | — | — | SE 10 | ESE 14 | SE 10 | SE 12 | SSE 9 | E 11 | ENE 10 | — | — | SE 11 | E 11 | SE 10 | E 13 | ESE 8 | SSE 8 | S 8 | E 15 | W 10 | W 10 |
— | — | 25 | 20 | 14 | 38 | 8 | 20 | 19 | — | — | 4 | 149 | 16 | 32 | 90 | 86 | 23 | 17 | 153 | 46 | |
Wind waves Height (m) Direction Period (s) | S 9 | S 10 | SSE 6 | ENE 9 | ESE 5 | E 5 | E 11 | E 5 | ENE 7 | — | N 6 | NNW 8 | WNW 10 | WNW 11 | S 9 | — | SW 9 | SSW 7 | SSW 9 | — | — |
1303 | 1316 | 85 | 27 | 22 | 28 | 155 | 43 | 93 | — | 156 | 978 | 1700 | 2258 | 372 | — | 115 | 134 | 270 | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 599 | 670 | 13 | 13 | 13 | 13 | 13 | 13 | 14 | 13 | 13 | 14 | 0 | 14 | 0 | 607 | 607 | 607 | 616 | 10 | 13 |
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.











