
Surf Forecasts:
Osaki Point surf forecast from 5 Aug 2026:
- Best quality surf: Tuesday 11 Aug, 3PM (local time) - 7ft (2.1m), 12s period, SSW swell with cross-offshore winds.
- Most powerful swell: Thursday 6 Aug, 3PM (local time) - 18ft (5.5m), 15s period, SE swell with 12,412 kJ wave energy.
- Next surfable swell (1★+): Tuesday 11 Aug, 3PM (local time) - 7ft (2.1m), 12s 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 3PM. The primary swell is predicted to be 2.1m and 12s period with a secondary swell of 0.8m and 11s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Osaki Point in the next 16 days are 5.5m 15s and forecast to arrive on Thursday (Aug 06) at 3PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 3s period and expected on Wednesday (Aug 12) at 9PM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3PM (Tue 11th Aug) | 7ft (2.1m) 12s |
| Best Surf | 3PM (Tue 11th Aug) | 7ft (2.1m) 12s |
| Most Powerful | 3PM (Thu 6th Aug) | 18ft (5.5m) 15s |
Table - best surf conditions forecast for Osaki Point over the next 16 days.
The Lowdown
Alright folks, let’s get real here. The next couple of weeks are looking like a classic “wait for it” scenario. We’ve got a ton of wind and swell direction issues lining up to ruin a lot of days. But there is a golden window if you’re patient, and it’s a good one.
Osaki Point (Osaki-Point) is our only spot worth talking about. The first week is a complete washout for surfers. From the 6th to the 10th, we’ve got serious, building swell coming from the SE and SSE, pushing 14 to 18 feet. That’s way too much juice, and it’s coming with strong onshore winds. The energy readings are insane—numbers like 10035 and 12412, which is raw, deadly power. This isn't surfable; it’s a washing machine. The wind is howling at 19 to 22 mph and it’s just going to be a stormy mess. This is for the kite crowd, not for the surfboard. With that much swell and wind, people with paddles should stay well clear.
The 11th sees the swell start to back down to around 7 feet, but the wind is still cross-onshore in the morning. The afternoon, though, is a sign of things to come. The wind swings to a light cross-off from the S, the swell drops to 7 feet, and the period is a solid 12 seconds. That’s the first glimpse of clean.
Then we hit the standout. Tuesday the 12th into Wednesday the 13th morning. This is the one to circle. Sunday the 12th morning, it’s glassy. Flat-out zero wind, with a 6-foot SSW swell at 11 seconds. The energy is moderate at 794, but with these conditions, it’s going to be clean, lined-up, and proper. The water temp is about average for this time of year, so a bit of a spring suit is all you need. This is the best this entire two weeks has to offer. Osaki is a beach and reef setup, so that long-period SSW groundswell should wrap in nicely. On the 13th morning, we still have about 4 feet, but the wind goes back onshore, so that window is short—mostly the 12th is your day.
After that, it just fades out. From the 14th onward, the swell shrinks down to under 5 feet and the period drops out too. There are moments of calm, like the 18th and 19th, but the swell is just too small and weak to be worth the paddle. It’s a poor run of tiny, gutless waves. You might find a fun little shoulder-high ripple on a longboard, but it’s a far cry from the day on the 12th.
So, the long and the short of it: the first week is a total blowout, and the back half is flat. Your one true standout is the morning of August 12th, with that 6 foot SSW groundswell and glassy conditions. That’s the one to be on.
Rusty
Short Range ForecastHeavy rain (total 53mm), heaviest during Fri night. Warm (max 30°C on Thu morning, min 27°C on Wed night). Mainly fresh winds. | Days 5-7 Weather SummaryHeavy rain (total 23mm), heaviest during Sat night. Warm (max 29°C on Tue morning, min 26°C on Sat night). Wind will be generally light. | ||||||||||||||||||
Thursday 6 | Friday 7 | Saturday 8 | Sunday 9 | Monday 10 | Tuesday 11 | ||||||||||||||
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) | SE 15 | SE 14 | SE 15 | SE 14 | SSE 14 | SSE 13 | S 13 | SSW 14 | SSW 14 | SSW 14 | SSW 15 | SSW 15 | SSW 14 | SSW 13 | SSW 13 | SSW 13 | SSW 12 | SSW 12 | SSW 11 |
Wave Graph | |||||||||||||||||||
10484 | 10035 | 12412 | 10375 | 8069 | 6608 | 4102 | 4369 | 4186 | 4275 | 5119 | 4021 | 3201 | 2792 | 2614 | 2039 | 1407 | 1226 | 950 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | on | on | on | on | on | cross-on | on | cross-on | on | on | on | on | on | cross-on | cross-on | cross-on | cross-off | cross-off |
High Tide | 9:53PM1.64m | 11:18AM1.35m | 10:36PM1.58m | 1:19PM1.32m | 11:39PM1.53m | 3:22PM1.41m | 1:12AM1.52m | 4:30PM1.55m | 2:43AM1.58m | 5:14PM1.67m | 3:53AM1.69m | 5:51PM1.76m | |||||||
Low Tide | 4:45AM0.52m | 4:27PM0.97m | 6:01AM0.50m | 5:44PM1.14m | 7:34AM0.44m | 7:56PM1.21m | 8:58AM0.31m | 9:36PM1.16m | 10:03AM0.17m | 10:34PM1.05m | 10:55AM0.05m | 11:19PM0.92m | |||||||
— | 5:18 | — | — | 5:18 | — | — | 5:18 | — | — | 5:20 | — | — | 5:20 | — | — | 5:22 | — | — | |
7:00 | — | 6:59 | — | — | 6:58 | — | — | 6:57 | — | — | 6:55 | — | — | 6:54 | — | — | 6:53 | — | |
mm | — | — | 2 | 9 | 4 | 7 | 18 | 7 | 6 | 8 | 2 | 4 | 6 | 2 | 1 | — | — | — | — |
Temp °C | 27 | 30 | 29 | 27 | 28 | 28 | 27 | 28 | 28 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 29 | 29 | 26 |
Feels °C | 29 | 29 | 28 | 28 | 29 | 29 | 28 | 29 | 29 | 29 | 28 | 29 | 29 | 28 | 28 | 30 | 31 | 31 | 29 |
Swell 1 Height (m) Direction Period (s) | SE 15 | SE 14 | SE 15 | SE 14 | SSE 14 | SSE 13 | S 13 | SSW 14 | SSW 14 | SSW 14 | SSW 15 | SSW 15 | SSW 14 | SSW 13 | SSW 13 | SSW 13 | SSW 12 | SSW 12 | SSW 11 |
10484 | 10035 | 12412 | 10375 | 8069 | 6608 | 4102 | 4369 | 4186 | 4275 | 5119 | 4021 | 3201 | 2792 | 2614 | 2039 | 1407 | 1226 | 950 | |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | E 15 | E 15 | E 15 | E 15 | — | — | SE 15 | E 13 | E 13 | E 12 | E 12 | E 11 | E 11 | E 11 |
— | — | — | — | — | 18 | 4 | 17 | 17 | — | — | 9 | 590 | 448 | 347 | 229 | 160 | 163 | 149 | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | SE 12 | S 12 | SE 14 | SE 14 | SE 14 | SSE 13 | SE 13 | ESE 13 |
— | — | — | — | — | — | — | — | — | — | — | 6 | 187 | 33 | 33 | 31 | 17 | 7 | 17 | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | E 10 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 13 | E 13 | — | — | — | — | — | — | — |
— | — | — | — | — | 392 | 1184 | 1392 | 1151 | 699 | 1127 | 1070 | — | — | — | — | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 22 | 51 | 483 | 30 | 483 | 483 | 483 | 497 | 483 | 42 | 483 | 483 | 42 | 392 | 534 | 16 | 16 | 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.











