Surf Forecasts:
Ohara surf forecast from 17 Aug 2026:
- Best quality surf: Friday 21 Aug, 6PM (local time) - 2.5ft (0.7m), 11s period, SSW swell with offshore winds.
- Most powerful swell: Monday 24 Aug, 9AM (local time) - 7ft (2.2m), 7s period, SSW swell with 459 kJ wave energy.
- Next surfable swell (1★+): Monday 17 Aug, 6PM (local time) - 3ft (0.9m), 8s 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 Monday (Aug 17) at 6PM. The primary swell is predicted to be 0.9m 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 Ohara in the next 16 days are 2.2m 7s and forecast to arrive on Monday (Aug 24) at 9AM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.6m 6s period and expected on Monday (Aug 24) at 12AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6PM (Mon 17th Aug) | 3ft (0.9m) 8s |
| Best Surf | 6PM (Fri 21st Aug) | 2.5ft (0.7m) 11s |
| Most Powerful | 9AM (Mon 24th Aug) | 7ft (2.2m) 7s |
Table - best surf conditions forecast for Ohara over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s break down what Ohara has cookin’ over the next couple of weeks.
First off, Ohara is an inconsistent spot, so don’t plan your life around it. Water temp is about 81°F, pretty much normal for this time of year.
The early part is small and quiet. Monday the 17th is your best bet early on: waves around 3ft from the east, 9-second period, light cross-off breeze, and clean. Combined energy is moderate (208). It’s not epic, but it’s the cleanest of a weak run.
From Tuesday the 18th through to the 24th, it’s a rough stretch. Swell drops to 2ft or less, short periods, mostly cross-off wind. Nothing worth paddling out for.
Then, around Tuesday the 25th, a long-period groundswell arrives. By Wednesday the 26th afternoon, it’s 7ft of SSE swell at 15 seconds, with offshore wind. Combined energy is huge (2263). This is proper groundswell—long, powerful, and best for a reef or point.
Thursday the 27th stays solid with 8ft SSE, 15-second period, offshore. Friday the 28th is the standout: 8ft of SSE, 16-second period, clean offshore. Combined energy is massive (3610–4258). This is expert-only territory, big and clean.
Heads up: from Saturday the 29th, the swell gets too big for Ohara—10ft to 13ft, with 16–17-second periods and energy over 9000. Too big for comfort at this break.
Tuesday the 1st of September drops back to 7–8ft, still long-period and offshore, giving experts another good window.
So, the first week is a dud, but the end of August and start of September bring serious, high-quality groundswell for experienced surfers only. Beginners, sit this one out.
Rusty out.
Short Range ForecastMostly dry. Warm (max 27°C on Mon afternoon, min 24°C on Tue night). Wind will be generally light. | Days 5-7 Weather SummaryModerate rain (total 12mm), heaviest on Sun morning. Warm (max 27°C on Thu afternoon, min 24°C on Sun morning). Wind will be generally light. | |||||||||||||||||||
Mon 17 | Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | ||||||||||||||
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 | ESE 8 | ESE 8 | E 8 | E 8 | SE 10 | E 9 | SE 10 | SE 10 | SE 11 | ESE 8 | S 9 | S 9 | SSW 11 | ESE 9 | E 11 | E 10 | E 10 | E 9 | ESE 12 |
Wave Graph  | ||||||||||||||||||||
 kJ | 151 | 115 | 90 | 61 | 47 | 35 | 36 | 35 | 39 | 40 | 65 | 60 | 43 | 119 | 156 | 233 | 208 | 186 | 110 | 85 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross-off | cross-off | cross-off | cross | cross-off | cross-off | cross | cross-off | off | off | off | off | off | off | off | cross-off | off | cross-off |
High Tide | 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 | 4:18PM1.16m | 11:48PM1.19m | |||||||||
Low Tide | 1:27AM0.43m | 1:05PM0.67m | 2:11AM0.43m | 1:20PM0.80m | 3:02AM0.46m | 1:21PM0.90m | 4:11AM0.49m | 5:46AM0.49m | 7:17AM0.44m | 7:38PM1.13m | ||||||||||
 |  | | | |  | |  | | | | | | | | |  |  |  |  | |
 | — | — | 4:58 | — | — | 5:00 | — | — | 5:01 | — | — | 5:01 | — | — | 5:01 | — | — | 5:03 | — | — |
 | 6:25 | — | — | 6:23 | — | — | 6:22 | — | — | 6:22 | — | — | 6:21 | — | — | 6:19 | — | — | 6:17 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 5 | 7 | 2 | 18 |
Temp °C | 27 | 25 | 27 | 26 | 25 | 27 | 27 | 25 | 27 | 27 | 25 | 27 | 27 | 26 | 27 | 27 | 26 | 24 | 25 | 26 |
Feels °C | 30 | 27 | 29 | 28 | 28 | 30 | 29 | 28 | 29 | 29 | 28 | 29 | 28 | 28 | 29 | 28 | 27 | 26 | 26 | 27 |
Swell 1 Height (m) Direction Period (s) | E 9 | ESE 8 | ESE 8 | E 8 | E 8 | SE 6 | SE 6 | ESE 6 | SE 6 | E 8 | ESE 8 | S 9 | S 9 | SSW 11 | ESE 9 | E 11 | E 10 | E 10 | E 9 | E 9 |
| kJ | 151 | 115 | 90 | 61 | 47 | 23 | 28 | 22 | 15 | 32 | 65 | 60 | 43 | 119 | 156 | 233 | 208 | 186 | 110 | 56 |
Swell 2 Height (m) Direction Period (s) | SE 11 | SE 10 | SE 10 | SE 7 | SE 6 | E 8 | E 9 | ENE 9 | E 8 | SE 11 | S 10 | E 8 | E 8 | E 10 | SSW 10 | S 10 | S 10 | SSW 9 | SSW 9 | ESE 12 |
| kJ | 30 | 39 | 37 | 21 | 24 | 35 | 36 | 25 | 34 | 40 | 49 | 33 | 34 | 88 | 78 | 70 | 46 | 28 | 28 | 85 |
Swell 3 Height (m) Direction Period (s) | SSW 8 | SSW 8 | SSW 8 | SE 10 | SE 10 | SE 10 | SE 10 | SE 10 | SE 10 | SSW 9 | SE 11 | SE 11 | SE 10 | SE 10 | S 4 | SE 10 | SSE 10 | SSE 10 | ESE 12 | SSE 10 |
| kJ | 23 | 13 | 6 | 37 | 36 | 35 | 35 | 35 | 39 | 16 | 40 | 41 | 37 | 37 | 5 | 4 | 10 | 19 | 30 | 10 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | ESE 6 | SE 6 | SE 6 | S 3 | S 4 | S 4 | S 4 | S 4 | S 5 | S 4 | SSW 6 |
| kJ | — | — | — | — | — | — | — | — | — | 13 | 43 | 15 | 5 | 9 | 7 | 8 | 5 | 11 | 16 | 148 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 0 | 0 | 0 | 9 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 92 | 151 | 8 | 9 | 151 | 8 |
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.
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