Surf Forecasts:
Ohara surf forecast from 25 Aug 2026:
- Best quality surf: Tuesday 1 Sep, 9PM (local time) - 3.5ft (1.1m), 12s period, S swell with cross-offshore winds.
- Most powerful swell: Wednesday 2 Sep, 3AM (local time) - 5ft (1.5m), 13s period, S swell with 759 kJ wave energy.
- Next surfable swell (1★+): Wednesday 26 Aug, 9AM (local time) - 3ft (0.9m), 10s period with SSE 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 Wednesday (Aug 26) at 9AM. The primary swell is predicted to be 0.9m and 10s period with a secondary swell of 0.7m and 5s. 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 1.5m 13s and forecast to arrive on Wednesday (Sep 02) at 3AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.3m 5s period and expected on Thursday (Aug 27) at 9AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9AM (Wed 26th Aug) | 3ft (0.9m) 10s |
| Best Surf | 9PM (Tue 1st Sep) | 3.5ft (1.1m) 12s |
| Most Powerful | 3AM (Wed 2nd Sep) | 5ft (1.5m) 13s |
Table - best surf conditions forecast for Ohara over the next 16 days.
The Lowdown
Right then, let’s have a look at what’s on the cards for the next couple of weeks.
Overall, it’s a bit of a mixed bag. There’s some decent energy coming, but we’ve got to sit through a lot of average to poor conditions to get to the good stuff. The beginning of the period is pretty quiet, and the standout window is a few days away, but when it fires, it’ll be worth the wait.
We start off with Ohara. Wednesday 26th August morning is actually pretty clean, with a light breeze and a small 3 ft SSE swell, period around 10 seconds. The energy is weak, just 284 (combined energy), but it’s surfable. The water temp is about average for the time of year. The afternoon though, the wind picks up to 19 mph and it gets messy, so get on it early.
Thursday 27th and Friday 28th are mostly poor. Onshore winds and rain or storms make it a write-off. There’s a brief window Friday afternoon with a 3 ft SSW swell, but that’s short period stuff at 8 seconds, so it’s weak and won’t hold much shape. Not worth getting excited about.
The weekend and into Monday are small and weak. The swell drops to 2 ft, and the wind is either onshore or cross-onshore, leaving the surf choppy or just flat. The combined energy drops to around 93 to 144, which is barely a ripple. Sunday morning is glassy, but the waves are tiny.
Now, here’s where it gets interesting. From Tuesday 1st September, we see a new S swell building. The wind is still a bit messy, with cross-onshore and cross conditions, and the swell is 3 ft to 4 ft, period 12 seconds. The energy jumps to 396-436, which is moderate. Conditions are marginal though.
The real standout is Wednesday 2nd September. The wind swings offshore from the S, blowing at 16 to 19 mph, and it’s clean. The swell picks up to 5 ft in the morning, then 6 ft in the afternoon, with a period of 13 seconds. The combined energy hits 978 in the morning and a solid 1206 in the afternoon. That’s strong wave energy. The swell direction is S, which is bang on the optimum for Ohara, and it’s a groundswell. This is the best session on offer. For a strong intermediate, this is clean, powerful, and well-shaped. The offshore wind is a huge plus. It’s a bit big for beginners, but for the experienced crew, this is the one.
Thursday 3rd and Friday 4th keep the S swell running, with 5 ft to 4 ft waves, still with offshore or cross-offshore winds. The energy is strong (701 down to 427). Good surf continues, but it’s not quite as punchy as Wednesday.
Then we hit a lull again. Saturday 5th and Sunday 6th see the wind switching back onshore, and the swell drops to 3 ft or less. Poor again.
Monday 7th brings a new SSE swell, building to 5 ft with a period of 11 seconds. The wind is cross-offshore, and the energy is 591. Surfable, but nothing special.
The big warning comes on Monday afternoon and into Tuesday 8th September. The swell absolutely detonates, jumping to 10 ft then 13 ft and 15 ft, with periods of 12-14 seconds and combined energy of 2971, 4536, and 5031. That’s a massive amount of energy. The wind is cross-offshore and cross, but the swell is just too big for Ohara. That’s expert-only territory, and even then, it’s going to be a washing machine. It’s more of a spectacle than a session.
After that, Wednesday 9th and Thursday 10th see the swell dropping back, but the wind is onshore and choppy, so it’s back to poor conditions.
So to sum it up: the clear standout is Wednesday 2nd September, with solid S swell, strong energy, and clean offshore wind. Friday 4th afternoon is also a good one. The rest of the period is either small or blown out, with a couple of days of dangerous, oversized swell to avoid.
Rusty.
Short Range ForecastModerate rain (total 18mm), heaviest on Thu morning. Warm (max 30°C on Wed morning, min 23°C on Thu afternoon). Winds decreasing (fresh winds from the SW on Wed night, calm by Thu afternoon). | Days 5-7 Weather SummaryLight rain (total 4mm), mostly falling on Mon morning. Warm (max 26°C on Fri night, min 23°C on Sat night). Wind will be generally light. | ||||||||||||||||||
Wednesday 26 | Thursday 27 | Friday 28 | Saturday 29 | Sunday 30 | Monday 31 | ||||||||||||||
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) | S 12 | SSE 10 | SSE 9 | SSE 9 | SSE 10 | E 13 | E 13 | E 12 | SSW 8 | E 12 | E 12 | E 11 | E 11 | E 11 | E 11 | E 11 | E 11 | E 11 | S 12 |
Wave Graph | |||||||||||||||||||
287 | 159 | 146 | 113 | 120 | 173 | 163 | 148 | 125 | 99 | 96 | 60 | 58 | 57 | 63 | 58 | 58 | 58 | 105 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross-off | cross-off | on | on | off | cross | cross-off | cross-on | cross-on | cross-on | on | glassy | cross | cross-on | cross-on | on | on |
High Tide | 2:22AM1.30m | 4:34PM1.29m | 3:08AM1.36m | 4:50PM1.32m | 3:49AM1.41m | 5:07PM1.36m | 4:29AM1.43m | 5:24PM1.39m | 5:09AM1.42m | 5:43PM1.41m | 5:50AM1.39m | 6:02PM1.43m | |||||||
Low Tide | 9:15PM0.96m | 9:34AM0.22m | 9:45PM0.85m | 10:05AM0.19m | 10:14PM0.75m | 10:34AM0.19m | 10:44PM0.63m | 11:02AM0.24m | 11:16PM0.53m | 11:29AM0.32m | 11:48PM0.43m | 11:56AM0.44m | 00:24AM0.36m | ||||||
— | 5:05 | — | — | 5:05 | — | — | 5:07 | — | — | 5:07 | — | — | 5:07 | — | — | 5:09 | — | — | |
6:15 | — | 6:14 | — | — | 6:13 | — | — | 6:12 | — | — | 6:09 | — | — | 6:08 | — | — | 6:07 | — | |
mm | — | — | — | — | 12 | 1 | 3 | 2 | — | — | — | — | 1 | — | — | 1 | 2 | — | — |
Temp °C | 27 | 30 | 29 | 27 | 26 | 25 | 25 | 28 | 28 | 26 | 26 | 26 | 25 | 26 | 25 | 24 | 23 | 24 | 24 |
Feels °C | 28 | 31 | 30 | 29 | 30 | 27 | 26 | 30 | 31 | 31 | 26 | 26 | 27 | 29 | 28 | 24 | 24 | 25 | 27 |
Swell 1 Height (m) Direction Period (s) | SSE 10 | SSE 10 | SSE 9 | SSE 9 | SSW 6 | SSW 6 | S 9 | SSW 6 | E 12 | SSW 6 | E 12 | E 11 | E 5 | E 11 | E 11 | E 11 | E 11 | E 11 | S 12 |
237 | 159 | 146 | 113 | 48 | 37 | 134 | 55 | 103 | 40 | 96 | 60 | 43 | 57 | 63 | 58 | 58 | 58 | 105 | |
Swell 2 Height (m) Direction Period (s) | S 12 | SSW 5 | ESE 12 | E 12 | SSE 10 | E 13 | E 13 | E 12 | SE 9 | E 12 | S 8 | SSW 8 | E 11 | E 5 | ENE 5 | SSW 7 | SSW 7 | S 10 | ENE 7 |
287 | 24 | 113 | 70 | 120 | 173 | 163 | 148 | 22 | 99 | 30 | 20 | 58 | 11 | 10 | 18 | 15 | 52 | 34 | |
Swell 3 Height (m) Direction Period (s) | ESE 13 | S 12 | S 12 | SSW 11 | E 11 | SSE 10 | SE 10 | S 9 | SE 15 | SE 9 | SE 11 | SE 11 | SSW 8 | SE 10 | SSW 8 | SE 10 | SE 9 | NE 7 | S 10 |
176 | 101 | 101 | 47 | 59 | 80 | 26 | 36 | 8 | 23 | 30 | 30 | 20 | 25 | 19 | 26 | 22 | 19 | 65 | |
Wind waves Height (m) Direction Period (s) | SW 5 | SW 5 | SSW 5 | SSW 5 | SW 5 | NE 4 | SSW 6 | SW 6 | SSW 8 | — | NE 3 | ENE 5 | — | — | NNE 5 | ENE 5 | NE 4 | ENE 5 | — |
36 | 69 | 52 | 55 | 103 | 7 | 28 | 112 | 125 | — | 2 | 53 | — | — | 2 | 18 | 16 | 15 | — | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 9 | 0 | 92 | 9 | 6 | 6 | 0 | 6 | 0 | 9 | 64 | 64 | 6 | 0 | 30 | 563 | 30 | 9 | 6 |
Best forecast wave conditions in Chiba | |||||||||||||||||||
Best forecast wave conditions in Japan | |||||||||||||||||||
Header Global | |||||||||||||||||||
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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.











