Surf Forecasts:
Ohara surf forecast from 15 Aug 2026:
- Best quality surf: Sunday 16 Aug, 6AM (local time) - 4.5ft (1.3m), 9s period, ESE swell with cross-offshore winds.
- Most powerful swell: Sunday 16 Aug, 6AM (local time) - 4.5ft (1.3m), 9s period, ESE swell with 308 kJ wave energy.
- Next surfable swell (1★+): Sunday 16 Aug, 6AM (local time) - 4.5ft (1.3m), 9s period with ESE swell.
Best Forecast Surf Conditions for Ohara this week:
The surf forecast for Ohara over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Sunday (Aug 16) at 6AM. The primary swell is predicted to be 1.3m and 9s period with a secondary swell of 0.5m and 9s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Ohara in the next 16 days are 1.3m 9s and forecast to arrive on Sunday (Aug 16) at 6AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 3s period and expected on Saturday (Aug 22) at 3PM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6AM (Sun 16th Aug) | 4.5ft (1.3m) 9s |
| Best Surf | 6AM (Sun 16th Aug) | 4.5ft (1.3m) 9s |
| Most Powerful | 6AM (Sun 16th Aug) | 4.5ft (1.3m) 9s |
Table - best surf conditions forecast for Ohara over the next 16 days.
The Lowdown
Alright, let's get into it.
The ocean’s been in a slumber for the last few days, and honestly, for the first stretch here, it’s a bit of a bust at Ohara. We’ve got a little bit of swell around the 3ft mark, but it’s coming in short and weak, with the energy sitting down around the 146 to 271 mark. The wind is staying cross or just plain messy in the mornings, so we’re looking at a whole lot of wind chop and poor conditions. If you're desperate for a paddle, Tuesday afternoon looks the most that’s on offer, but the waves will be nothing to write home about.
Things stay pretty marginal through Wednesday and Thursday morning, with weak, short-period swell and not much in the way of clean faces. The energy is startin’ to build Thursday, with a reading of 379, but it’s still not enough to get the heart rate up.
The Turnaround: Thursday Afternoon Onwards
Alright, but here’s where the tide starts to turn. Thursday afternoon, we get a proper shift. The wind straightens out into a cross-off, the sea glassies up, and we’ve got a clean 3.5ft of east swell. The score’s finally above zero. It’s still not big, but at least it's surfable.
Friday gets a bit smaller, and then Saturday, we’ve got a new SW wind starting to groom things with some solid 3ft waves and really clean 10-second period swells. The energy is starting to climb, with readings around 275 to 307.
The Main Event: Sunday the 23rd Through Tuesday the 26th
Then, hold onto your boardies, because the first real standout of this window is Sunday, August 23rd afternoon. The wind goes proper offshore out of the south, and the swell settles in. We're looking at around 3ft, but here's the kicker: the period jumps to 16 seconds. That’s a true groundswell, and the energy meter just jumps to 581. This is where the ocean starts waking up.
It ain't massive, but it’s clean, lined-up, and the SE direction is exactly what Ohara loves. This is the one to get on if you can.
And then the big one. Monday, August 24th through Wednesday, August 26th is the true standout window of this whole forecast. The swell pulses up and holds. We're talking 5.5ft on Monday morning, building to a solid 8ft by Wednesday afternoon. The period stays in that sweet 14-16 second zone, and the energy readings are huge – we're seeing values from 1639 up to a massive 2849. The wind stays light offshore or clean cross-off the whole time. This is clean, powerful, grinding surf. Ohara is an exposed spot, and this is the kind of swell that will have it firing. It’s still for experienced surfers, though, with those sizes.
The Fallout: The 27th and Beyond
Now, for the last part of the run, it gets messy. From Thursday, August 27th, the swell just explodes. We’re talkin’ 10ft plus. The energy numbers are off the charts – hitting four to five thousand. But it’s simply too big for this break; it’s going to be a washing machine out there. The wind turns onshore with a chance of thunderstorms, and it’s really only for the most extreme big-wave specialists, and even then, it looks like a paddle-out survival mission more than a surf.
After that peak, it backs down through the 30th, but the surface gets messy again with fresh winds, and while there’s some clean energy on the 30th afternoon, it's a far cry from the flawless conditions earlier in the week.
The whole run finishes with a massive spike in energy on Monday, August 31st, with a 19-second period and a 10ft swell – again, way too much for this spot.
Bottom Line: The best of it, the real standout, is Monday the 24th through Wednesday the 26th. Get on it early, get on it clean. The Sunday afternoon session is a nice warm-up with that long-period groundswell, but the main event is those three days. After that, it’s too big and too messy.
Alright, stay stoked.
Short Range ForecastLight rain (total 6mm), mostly falling on Sun morning. Warm (max 27°C on Tue morning, min 24°C on Sun night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 27°C on Wed morning, min 24°C on Wed night). Wind will be generally light. | ||||||||||||||||||||
Sunday 16 | Monday 17 | Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | |||||||||||||||
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) | E 9 | E 8 | E 9 | E 9 | E 9 | ESE 8 | ESE 8 | E 8 | SE 7 | ESE 7 | ENE 9 | E 7 | E 8 | E 8 | ESE 8 | ESE 7 | S 12 | SSW 11 | ESE 9 | ESE 10 | E 10 |
Wave Graph | |||||||||||||||||||||
293 | 200 | 230 | 186 | 151 | 118 | 109 | 64 | 71 | 70 | 68 | 86 | 176 | 153 | 127 | 71 | 70 | 117 | 181 | 201 | 192 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross | cross | cross | cross | cross | cross-off | cross | cross | cross | cross | cross | cross-off | cross-off | cross-off | off | off | cross-off | off | cross-off |
High Tide | 6:35PM1.39m | 6:49AM1.29m | 6:55PM1.40m | 7:36AM1.17m | 7:14PM1.39m | 8:31AM1.06m | 7:35PM1.36m | 9:55AM0.97m | 7:57PM1.33m | 8:25PM1.27m | 9:20PM1.21m | ||||||||||
Low Tide | 12:20PM0.38m | 00:47AM0.46m | 12:44PM0.53m | 1:27AM0.43m | 1:05PM0.67m | 2:11AM0.43m | 1:20PM0.80m | 3:02AM0.46m | 1:21PM0.90m | 4:11AM0.49m | 5:46AM0.49m | ||||||||||
4:56 | — | — | 4:58 | — | — | 4:58 | — | — | 5:00 | — | — | 5:01 | — | — | 5:01 | — | — | 5:01 | — | — | |
— | 6:27 | — | — | 6:25 | — | — | 6:23 | — | — | 6:22 | — | — | 6:22 | — | — | 6:21 | — | — | 6:19 | — | |
mm | 2 | — | 2 | 1 | — | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 26 | 26 | 25 | 26 | 26 | 25 | 27 | 27 | 25 | 27 | 27 | 25 | 27 | 27 | 26 | 27 | 27 | 26 | 27 | 27 | 26 |
Feels °C | 26 | 27 | 27 | 27 | 28 | 28 | 29 | 29 | 28 | 29 | 29 | 28 | 30 | 29 | 29 | 29 | 28 | 28 | 28 | 28 | 27 |
Swell 1 Height (m) Direction Period (s) | E 9 | E 8 | E 9 | E 9 | E 9 | ESE 8 | ESE 8 | SE 7 | SE 7 | ESE 7 | ESE 7 | E 7 | E 8 | E 8 | ESE 8 | ESE 7 | ESE 7 | ESE 8 | ESE 9 | ESE 10 | E 10 |
293 | 200 | 230 | 186 | 151 | 118 | 109 | 49 | 71 | 70 | 63 | 86 | 153 | 153 | 127 | 71 | 67 | 115 | 181 | 201 | 192 | |
Swell 2 Height (m) Direction Period (s) | SSW 9 | S 9 | S 8 | SSW 8 | SSW 8 | SE 11 | SE 10 | SE 10 | E 9 | E 9 | E 9 | SE 10 | SE 11 | SE 10 | SE 11 | S 8 | S 12 | SSW 11 | SSW 10 | SSW 10 | SSW 10 |
27 | 36 | 35 | 24 | 23 | 29 | 36 | 27 | 56 | 39 | 24 | 36 | 43 | 38 | 40 | 36 | 70 | 117 | 82 | 78 | 56 | |
Swell 3 Height (m) Direction Period (s) | ESE 9 | ESE 9 | SE 11 | SE 11 | SE 11 | SSW 8 | SSW 8 | SSW 8 | SE 10 | SE 10 | SE 10 | SSW 8 | SSW 8 | S 10 | S 9 | SE 11 | SSW 8 | SE 10 | SSE 11 | SE 10 | SSE 10 |
32 | 35 | 31 | 30 | 30 | 13 | 6 | 6 | 26 | 25 | 35 | 6 | 7 | 17 | 26 | 40 | 24 | 36 | 12 | 28 | 19 | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | E 8 | — | — | ENE 9 | ESE 7 | E 8 | — | — | — | — | — | — | S 3 | S 3 |
— | — | — | — | — | — | — | 64 | — | — | 68 | 43 | 176 | — | — | — | — | — | — | 5 | 6 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 8 | 111 | 58 | 58 | 62 | 64 | 9 | 0 | 64 | 9 | 58 | 64 | 9 | 0 | 0 | 0 | 0 | 0 | 92 | 0 | 114 |
Best forecast wave conditions in Chiba | |||||||||||||||||||||
Best forecast wave conditions in Japan | |||||||||||||||||||||
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Information about the Ohara Surf forecast
The above surf forecast table for Ohara provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Ohara can be found by selecting the local surf guide option on the grey menu. Our Ohara 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 (Ohara) 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 Ohara 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.
Ohara is 2 km (1 miles) from Ohara. If you plan a holiday in Chiba, look for hotels and other accommodation in Ohara. Ohara has rooms for a wide range of budgets as well as car hire and transport links.











