
Surf Forecasts:
Yonabaru surf forecast from 15 Sep 2026:
- Best quality surf: Wednesday 23 Sep, 3AM (local time) - 2.5ft (0.8m), 8s period, N swell with cross-offshore winds.
- Most powerful swell: Sunday 20 Sep, 9PM (local time) - 6.5ft (2.0m), 13s period, E swell with 1,370 kJ wave energy.
- Next surfable swell (1★+): Wednesday 23 Sep, 3AM (local time) - 2.5ft (0.8m), 8s period with N 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 Wednesday (Sep 23) at 3AM. The primary swell is predicted to be 0.8m and 8s period with a secondary swell of 0.4m and 11s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Yonabaru in the next 16 days are 2.0m 13s and forecast to arrive on Sunday (Sep 20) at 9PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 8s period and expected on Saturday (Sep 19) at 3AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3AM (Wed 23rd Sep) | 2.5ft (0.8m) 8s |
| Best Surf | 3AM (Wed 23rd Sep) | 2.5ft (0.8m) 8s |
| Most Powerful | 9PM (Sun 20th Sep) | 6.5ft (2.0m) 13s |
Table - best surf conditions forecast for Yonabaru over the next 16 days.
The Lowdown
G’day, Rusty here. Let’s have a look at what’s on the cards for the next couple of weeks. To be honest, it’s a tough stretch – a real lean run for decent waves. The first week and a half is basically a write-off, with hardly anything worth getting wet for. The only faint glimmer comes towards the end of the second week, so don’t be in a rush.
Looking at Yonabaru as the only spot on offer, it’s a beginner-friendly break, fairly consistent, exposed to swell from the east and northeast. Water temp is about average for this time of year, nothing to write home about. The combined swell energy (242) late Wednesday morning is moderate, but the surf is poor – cross-onshore winds and small, messy wind ripples. That’s the story for the next six days straight: Wednesday the 16th through to Monday the 21st, we’ve got persistent cross-onshore or cross-shore breezes, sometimes picking up to a moderate breeze, with tiny swell heights around 2 ft to 3 ft, and periods mostly short between 9 and 15 seconds. The energy climbs a bit on the 19th afternoon (381), but it’s still poor, with a moderate cross-shore chop. Honestly, not a single session worth paddling out for.
Sunday morning the 20th sees a bump in swell to 6 ft from the east, with a 13-second period (groundswell), and the combined energy jumps to (1112). That sounds promising, but the wind is a cross-shore moderate breeze, and the forecast calls it marginal. The long period at a beach break like Yonabaru means it’ll likely break too straight, and with cross-shore winds, it won’t be clean. Sunday afternoon and Monday are similar, but the breeze gets stronger, making it messy. Tuesday the 22nd improves a little with cleaner conditions (cross-offshore), but the swell drops back to 2 ft-3 ft, not enough to get excited about.
The only real standout, and I mean the *only* one in this whole 16-day window, is Wednesday the 23rd of September. Early morning there’s glassy conditions – dead calm, no wind – and a small 3 ft swell from the north, short period of 7 seconds. The combined energy is weak (107), and the waves are surfable but very ordinary. But hey, glassy is glassy. For a beginner spot, that’s about as good as it gets around here with the crap we’ve had. Expect crowds possibly there, given it’s the only clean window. After lunch the wind turns cross-offshore, still clean but the swell drops even more to 2 ft.
From Thursday the 24th onwards, it all falls apart again – onshore winds, tiny swell under 2 ft, and combined energy barely hitting 50-100. The end of September and start of October is a write-off: strong winds, gale-force on the 28th and 29th with swell over 7 ft, but those are gale-force winds making it dangerous and unsurfable. Even though it’s clean (cross-offshore), 40 mph winds are no joke – that’s kite-surfing territory, not paddle surfing.
So, bottom line: if you’re desperate for a paddle, keep your eye on the morning of Wednesday the 23rd. That’s your one shot. Everything else is a miss. Stay patient, mate – it tends not to stay poor for long.
Rusty.
Short Range ForecastModerate rain (total 13mm), heaviest on Wed afternoon. Warm (max 28°C on Wed morning, min 26°C on Tue night). Wind will be generally light. | Days 5-7 Weather SummarySome drizzle, heaviest during Sun afternoon. Warm (max 28°C on Sat morning, min 25°C on Sun night). Wind will be generally light. | ||||||||||||||||||
Wednesday 16 | Thursday 17 | Friday 18 | Saturday 19 | Sunday 20 | Monday 21 | ||||||||||||||
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 9 | ESE 10 | ESE 9 | ESE 9 | E 9 | ESE 9 | E 13 | E 9 | E 9 | ESE 9 | E 15 | E 14 | E 13 | E 13 | E 13 | E 13 | E 13 | E 12 | ENE 13 |
Wave Graph | |||||||||||||||||||
180 | 150 | 144 | 113 | 130 | 108 | 84 | 55 | 54 | 62 | 113 | 236 | 1006 | 1077 | 1233 | 1256 | 848 | 439 | 345 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross | cross | cross-on | cross | cross | cross | cross | cross-off | cross |
High Tide | 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 | 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 | |||||||
— | 6:13 | — | — | 6:15 | — | — | 6:15 | — | — | 6:15 | — | — | 6:16 | — | — | 6:16 | — | — | |
6:34 | — | 6:32 | — | — | 6:31 | — | — | 6:30 | — | — | 6:29 | — | — | 6:28 | — | — | 6:27 | — | |
mm | 2 | 1 | 2 | 1 | 1 | 2 | 1 | 1 | 2 | — | — | — | — | — | 1 | — | — | — | — |
Temp °C | 27 | 28 | 28 | 26 | 28 | 27 | 26 | 28 | 28 | 27 | 28 | 28 | 26 | 27 | 27 | 26 | 27 | 27 | 26 |
Feels °C | 31 | 31 | 31 | 29 | 31 | 30 | 29 | 32 | 32 | 31 | 30 | 30 | 29 | 29 | 28 | 25 | 25 | 25 | 24 |
Swell 1 Height (m) Direction Period (s) | E 9 | ESE 10 | ESE 9 | ESE 9 | E 9 | ESE 9 | E 9 | E 9 | E 9 | ESE 9 | E 9 | E 14 | E 13 | E 13 | E 13 | E 13 | E 13 | E 12 | N 9 |
180 | 150 | 144 | 113 | 130 | 108 | 78 | 55 | 54 | 62 | 74 | 236 | 1006 | 1077 | 1233 | 1256 | 848 | 439 | 215 | |
Swell 2 Height (m) Direction Period (s) | N 6 | NNW 6 | NNW 7 | E 14 | NNW 6 | N 6 | N 7 | N 7 | N 7 | E 12 | E 15 | ESE 9 | S 8 | N 8 | N 9 | S 8 | S 8 | S 8 | ENE 13 |
17 | 28 | 34 | 100 | 23 | 20 | 27 | 26 | 15 | 44 | 113 | 59 | 12 | 35 | 60 | 11 | 5 | 4 | 345 | |
Swell 3 Height (m) Direction Period (s) | E 15 | E 14 | E 14 | SW 7 | E 14 | E 13 | E 13 | E 12 | E 12 | S 8 | S 8 | E 11 | N 9 | S 8 | S 8 | — | — | SE 10 | S 7 |
17 | 64 | 59 | 2 | 92 | 84 | 84 | 47 | 45 | 22 | 22 | 62 | 14 | 12 | 12 | — | — | 4 | 4 | |
Wind waves Height (m) Direction Period (s) | — | — | — | N 7 | — | NE 3 | — | — | — | N 3 | N 9 | N 7 | N 4 | — | — | N 8 | N 8 | N 9 | — |
— | — | — | 44 | — | 3 | — | — | — | 1 | 13 | 24 | 7 | — | — | 195 | 260 | 220 | — | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 607 | 14 | 670 | 14 | 14 | 785 | 607 | 672 | 607 | 607 |
Best forecast wave conditions in Okinawa | |||||||||||||||||||
Best forecast wave conditions in Japan | |||||||||||||||||||
Header Global | |||||||||||||||||||
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)
Wind Speed (km/h)
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.










