Surf Forecasts:
Osaki Point surf forecast from 11 Aug 2026:
- Best quality surf: Tuesday 11 Aug, 6PM (local time) - 4ft (1.2m), 10s period, SSW swell with offshore winds.
- Most powerful swell: Sunday 16 Aug, 3PM (local time) - 4.5ft (1.4m), 10s period, E swell with 377 kJ wave energy.
- Next surfable swell (1★+): Tuesday 11 Aug, 6PM (local time) - 4ft (1.2m), 10s period with SSW swell.
Best Forecast Surf Conditions for Osaki Point this week:
The surf forecast for Osaki Point over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Tuesday (Aug 11) at 6PM. The primary swell is predicted to be 1.2m and 10s period with a secondary swell of 0.9m and 11s. Another secondary swell of 1.4m and 5s is also forecast. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Osaki Point in the next 16 days are 1.4m 10s and forecast to arrive on Sunday (Aug 16) at 3PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 2s period and expected on Wednesday (Aug 12) at 12AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6PM (Tue 11th Aug) | 4ft (1.2m) 10s |
| Best Surf | 6PM (Tue 11th Aug) | 4ft (1.2m) 10s |
| Most Powerful | 3PM (Sun 16th Aug) | 4.5ft (1.4m) 10s |
Table - best surf conditions forecast for Osaki Point over the next 16 days.
The Lowdown
G’day, Rusty here. I’m looking at Osaki Point – a beach-and-reef spot that gets exposed. Water temp is about 84°F, pretty normal for the season. For the first week or so, it’s a slow grind.
From Tuesday 11 August right through Saturday 22 August, you’re looking at a lot of tiny, weak surf. The combined swell energy is low – hitting 597 on Tuesday afternoon and dropping to 75 by 18 August. Wind’s mostly onshore or cross-on, with a few little glassy moments but no power. You’d be chasing knee-high slop.
Monday 17 August morning goes glassy with 2ft of SSW swell (8 seconds, energy 178) – just a grovel. The afternoon cleans up nicely with a 2ft wave and a cross-off breeze, but it’s still small.
Thursday 20 August sees a clean offshore wind on 2ft of SE swell (9 seconds, energy 101) – rideable but small. Friday 21 August is the standout of the first week: clear, light offshore in the morning on 3ft of S swell (10 seconds, energy 243). The afternoon pushes 5ft with a clean cross-off from the SW, energy 468. Crowds are “sometimes,” so you might get some company, but it’s the best clean surf of the early run.
Now for the second week – and this is the big one, but it’s far out. Tuesday 25 August morning shows 3ft of SSE groundswell with a very long 14-second period (energy 475), and a clean cross-off breeze. That afternoon jumps to 5ft, 13 seconds, energy 878. Wednesday 26 August morning brings 6ft of S swell, 13 seconds, with energy at 1793. That afternoon hits 7ft, 14 seconds, energy 1996 – powerful, serious waves. But the wind turns cross-shore, and with a long period, the beach-and-reef setup might make it break straight. It’s for experts only; the average surfer might want to look at kite gear.
So, summary: the first week’s mostly a miss. Best day in week one is Friday 21 August. The serious action – if the forecast holds – is Tuesday 25 and Wednesday 26 August.
Rusty.
Short Range ForecastLight rain (total 7mm), mostly falling on Thu afternoon. Warm (max 29°C on Tue afternoon, min 23°C on Tue night). Wind will be generally light. | Days 4-6 Weather SummaryModerate rain (total 19mm), heaviest on Sat night. Warm (max 28°C on Fri morning, min 25°C on Fri night). Wind will be generally light. | ||||||||||||||||||||
Tuesday 11 | Wednesday 12 | Thursday 13 | Friday 14 | Saturday 15 | Sunday 16 | Monday 17 | |||||||||||||||
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) | S 10 | SSW 10 | SSW 10 | SSW 10 | SSW 10 | SSW 10 | SSW 9 | SSW 9 | SSW 9 | SSW 9 | E 11 | E 10 | SSW 10 | E 10 | SSW 9 | E 10 | E 10 | E 10 | E 10 | E 10 | E 10 |
Wave Graph  | |||||||||||||||||||||
 kJ | 235 | 326 | 285 | 274 | 157 | 201 | 149 | 146 | 108 | 101 | 108 | 98 | 125 | 125 | 99 | 313 | 377 | 308 | 262 | 164 | 73 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | on | cross-off | glassy | cross | glassy | cross-on | cross-off | glassy | on | cross | cross-on | on | cross-on | on | cross-on | cross-on | glassy | glassy | cross-off | off |
High Tide | 5:51PM1.76m | 4:50AM1.80m | 6:24PM1.81m | 5:39AM1.88m | 6:55PM1.83m | 6:25AM1.90m | 7:23PM1.83m | 7:08AM1.87m | 7:50PM1.81m | 7:50AM1.78m | 8:15PM1.77m | 8:31AM1.66m | 8:39PM1.71m | ||||||||
Low Tide | 10:55AM0.05m | 11:19PM0.92m | 11:40AM-0.01m | 11:59PM0.79m | 12:20PM0.01m | 00:36AM0.66m | 12:57PM0.08m | 1:13AM0.56m | 1:30PM0.22m | 1:49AM0.50m | 2:01PM0.39m | 2:25AM0.47m | 2:30PM0.57m | ||||||||
 | |  | | | |  | |  |  |  |  | | | | | | | | | | |
 | 5:22 | — | — | 5:22 | — | — | 5:22 | — | — | 5:24 | — | — | 5:24 | — | — | 5:24 | — | — | 5:26 | — | — |
 | — | 6:53 | — | — | 6:52 | — | — | 6:52 | — | — | 6:51 | — | — | 6:50 | — | — | 6:49 | — | — | 6:47 | — |
mm | — | — | — | — | — | — | 2 | 4 | 1 | 1 | — | — | — | 3 | 12 | 2 | 1 | — | — | — | — |
Temp °C | 28 | 29 | 25 | 28 | 27 | 26 | 27 | 26 | 25 | 28 | 28 | 26 | 28 | 28 | 26 | 28 | 28 | 26 | 29 | 29 | 26 |
Feels °C | 29 | 31 | 28 | 30 | 29 | 29 | 29 | 28 | 29 | 31 | 31 | 30 | 30 | 30 | 29 | 31 | 31 | 30 | 32 | 32 | 30 |
Swell 1 Height (m) Direction Period (s) | S 10 | SSW 10 | SSW 10 | SSW 10 | SSW 10 | SSW 10 | SSW 9 | SSW 9 | SSW 9 | SSW 9 | SSW 9 | SSW 8 | SSW 10 | SSW 9 | SSW 9 | SSW 9 | E 10 | E 10 | E 10 | E 10 | SSW 8 |
| kJ | 235 | 326 | 285 | 274 | 157 | 201 | 149 | 146 | 108 | 101 | 103 | 96 | 125 | 110 | 99 | 106 | 377 | 308 | 262 | 164 | 73 |
Swell 2 Height (m) Direction Period (s) | E 11 | E 11 | E 11 | E 11 | S 10 | E 10 | E 10 | E 9 | E 9 | E 10 | E 11 | E 10 | E 10 | E 10 | E 10 | SE 12 | SSW 9 | SSW 8 | S 8 | S 8 | E 10 |
| kJ | 196 | 185 | 205 | 119 | 96 | 50 | 30 | 43 | 43 | 78 | 108 | 98 | 98 | 125 | 90 | 49 | 84 | 73 | 35 | 36 | 66 |
Swell 3 Height (m) Direction Period (s) | SW 10 | SE 13 | NE 5 | SE 13 | E 11 | SE 12 | SE 12 | SE 12 | SW 5 | E 5 | E 4 | SE 9 | SE 8 | ESE 11 | SE 12 | E 18 | SE 11 | SE 11 | SSW 9 | SSW 9 | SE 11 |
| kJ | 85 | 27 | 9 | 27 | 59 | 24 | 23 | 22 | 5 | 5 | 4 | 12 | 23 | 22 | 23 | 6 | 45 | 42 | 30 | 30 | 30 |
Wind waves Height (m) Direction Period (s) | NE 5 | NE 6 | NW 2 | WNW 3 | — | — | — | ESE 3 | — | — | — | — | — | ESE 5 | E 6 | E 10 | — | — | — | — | — |
| kJ | 37 | 50 | 1 | 2 | — | — | — | 1 | — | — | — | — | — | 10 | 80 | 313 | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 22 | 24 | 0 | 0 | 425 | 0 | 22 | 0 | 0 | 22 | 20 | 16 | 22 | 49 | 16 | 22 | 20 | 0 | 0 | 0 | 0 |
Best forecast wave conditions in Shikoku | |||||||||||||||||||||
Best forecast wave conditions in Japan | |||||||||||||||||||||
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Information about the Osaki Point Surf forecast
The above surf forecast table for Osaki Point provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Osaki Point can be found by selecting the local surf guide option on the grey menu. Our Osaki Point 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 (Osaki Point) 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 Osaki Point 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.
Osaki Point is 14 km (9 miles) from Muroto. If you plan a holiday in Shikoku, look for hotels and other accommodation in Muroto. Muroto has rooms for a wide range of budgets as well as car hire and transport links.
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