Surf Forecasts:
Osaki Point surf forecast from 13 Aug 2026:
- Best quality surf: Friday 14 Aug, 3PM (local time) - 2.5ft (0.8m), 9s period, SSW swell with cross-offshore winds.
- Most powerful swell: Sunday 16 Aug, 6PM (local time) - 5ft (1.5m), 10s period, ESE swell with 407 kJ wave energy.
- Next surfable swell (1★+): Thursday 13 Aug, 6PM (local time) - 2.5ft (0.8m), 9s 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 Thursday (Aug 13) at 6PM. The primary swell is predicted to be 0.8m and 9s period with a secondary swell of 0.4m and 9s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Osaki Point in the next 16 days are 1.5m 10s and forecast to arrive on Sunday (Aug 16) at 6PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 4s period and expected on Tuesday (Aug 18) at 6AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6PM (Thu 13th Aug) | 2.5ft (0.8m) 9s |
| Best Surf | 3PM (Fri 14th Aug) | 2.5ft (0.8m) 9s |
| Most Powerful | 6PM (Sun 16th Aug) | 5ft (1.5m) 10s |
Table - best surf conditions forecast for Osaki Point over the next 16 days.
The Lowdown
Alright, Rusty here again. Let’s talk about Osaki Point.
Things are pretty average for the first week or so. The waves are small, the wind is onshore most of the time, so don’t get too excited. The water temp is about 84°F, normal for this time of year.
From the 13th through the 18th, you’re looking at waves mostly between 2 feet and 4 feet. Swell comes from the E or SSW with a period of 9 to 10 seconds – nothing special. The combined swell energy is weak to moderate. Wind is a pain, blowing cross-onshore from the ESE or E, which chops things up. Thursday the 13th morning has a tiny 3-foot SSW swell, but that cross-onshore wind makes it a no-go. Friday the 14th afternoon is the only real bright spot early on – the wind goes cross-off from the SSE, the wave height is a small 2 feet, but the conditions are clean. It’s small, but you might get a couple of fun ones.
From the 16th to the 19th, it’s pretty poor. Onshore winds pick up to 12-15 mph, the waves get messy, and the quality is bad. The swell is mostly from the E at 2 feet to 4 feet, but nothing is clean.
The 20th and 21st give us a window. Thursday the 20th morning goes glassy with a light WSW wind and a 4-foot SE swell at 8 seconds – period is a bit short, but glassy is glassy. Thursday afternoon the wind turns offshore from the SW at 12 mph, and the swell holds at 3 feet from the SE. That’s clean, with moderate energy. Friday the 21st might be your pick of the early run: glassy conditions again, a 3-foot S swell with a period of 9 seconds, and solid energy. The rules say this spot likes a SSE direction, so the S is a decent match. Not big, but clean and surfable.
Now for the heavy stuff. Around the 23rd and 24th of August, a powerful groundswell arrives. We’re talking 5 feet to 8 feet from the SE with a very long period of 14 to 15 seconds. The combined energy is huge, going from 1281 up to 2858 – that’s serious power. But the wind is onshore from the ENE at 12 mph, and the conditions are unknown. The size on the 24th afternoon is 8 feet, which is expert territory only. That long period (15 seconds) at a beach and reef setup can make it wall up and close out. For experienced surfers, the 23rd morning with a 5-foot SE swell and a 15-second period might offer some heavy, clean faces if the wind cooperates. The 25th and 26th still have leftover size (8 feet dropping to 6 feet) but the wind stays messy.
After that, it fades into small, clean but weak surf from the 27th onward, with offshore winds returning but the swell dropping to 1 feet to 2 feet.
Best on offer? I’d call Friday the 21st of August as the standout for the first week – glassy conditions, a clean 3-foot S swell, and no crowds to worry about. For the brave, the morning of the 23rd of August (Sunday) is the power play for experts only, with that 5-foot SE groundswell.
Rusty.
Short Range ForecastHeavy rain (total 27mm), heaviest during Sat night. Warm (max 28°C on Fri morning, min 24°C on Thu night). Wind will be generally light. | Days 4-6 Weather SummaryHeavy rain (total 31mm), heaviest during Sun night. Warm (max 29°C on Tue afternoon, min 26°C on Sun morning). Wind will be generally light. | ||||||||||||||||||||
Thursday 13 | Friday 14 | Saturday 15 | Sunday 16 | Monday 17 | Tuesday 18 | Wednesday 19 | |||||||||||||||
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) | SSW 9 | SSW 9 | SSW 9 | SSW 9 | SSW 9 | E 10 | SSW 10 | SSW 9 | SSW 9 | E 10 | E 10 | ESE 10 | E 10 | E 10 | E 10 | E 10 | E 10 | SE 10 | SE 10 | SE 6 | SSE 9 |
Wave Graph | |||||||||||||||||||||
149 | 110 | 108 | 106 | 106 | 98 | 123 | 108 | 101 | 319 | 158 | 282 | 339 | 346 | 250 | 94 | 88 | 36 | 26 | 36 | 292 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | glassy | on | cross-off | glassy | on | cross-on | on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | on | on | cross | glassy |
High Tide | 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 | 9:15AM1.51m | 9:02PM1.65m | 10:05AM1.37m | 9:25PM1.57m | ||||||||
Low Tide | 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 | 3:02AM0.48m | 2:55PM0.76m | 3:43AM0.53m | 3:19PM0.92m | ||||||||
5:22 | — | — | 5:24 | — | — | 5:24 | — | — | 5:24 | — | — | 5:26 | — | — | 5:26 | — | — | 5:26 | — | — | |
— | 6:52 | — | — | 6:51 | — | — | 6:50 | — | — | 6:49 | — | — | 6:47 | — | — | 6:45 | — | — | 6:45 | — | |
mm | 5 | 2 | 1 | 1 | 2 | 1 | 3 | 1 | 11 | 3 | 2 | 7 | 4 | 5 | 4 | 2 | — | 4 | 2 | 1 | 3 |
Temp °C | 27 | 27 | 25 | 28 | 28 | 26 | 28 | 28 | 26 | 27 | 28 | 26 | 27 | 28 | 26 | 28 | 29 | 27 | 29 | 29 | 27 |
Feels °C | 30 | 30 | 29 | 31 | 31 | 30 | 30 | 30 | 29 | 28 | 30 | 28 | 30 | 31 | 30 | 32 | 33 | 32 | 34 | 34 | 33 |
Swell 1 Height (m) Direction Period (s) | SSW 9 | SSW 9 | SSW 9 | SSW 9 | SSW 9 | E 10 | SSW 10 | SSW 9 | SSW 9 | SSW 8 | E 10 | ESE 10 | E 10 | E 10 | E 10 | E 10 | E 10 | SSE 8 | SE 10 | SE 6 | SSE 9 |
149 | 110 | 108 | 99 | 99 | 98 | 123 | 108 | 101 | 73 | 158 | 282 | 339 | 346 | 250 | 94 | 88 | 36 | 26 | 36 | 292 | |
Swell 2 Height (m) Direction Period (s) | E 10 | E 9 | E 9 | E 10 | E 10 | SSW 8 | E 10 | E 10 | E 10 | ESE 11 | S 9 | S 8 | S 8 | SSW 8 | SSW 8 | S 8 | SSW 8 | E 9 | SSW 8 | SE 10 | SSW 9 |
30 | 28 | 43 | 106 | 106 | 54 | 98 | 96 | 94 | 38 | 76 | 50 | 48 | 35 | 37 | 30 | 19 | 25 | 11 | 26 | 8 | |
Swell 3 Height (m) Direction Period (s) | SE 12 | SE 12 | E 4 | SE 11 | SE 11 | S 11 | SE 10 | SE 8 | SE 12 | SE 12 | SE 11 | SE 11 | SE 11 | SE 11 | SE 11 | SE 11 | SE 10 | SE 10 | E 8 | SSW 8 | E 8 |
23 | 22 | 3 | 19 | 19 | 57 | 17 | 10 | 22 | 22 | 20 | 42 | 42 | 42 | 30 | 29 | 28 | 27 | 6 | 11 | 5 | |
Wind waves Height (m) Direction Period (s) | ESE 4 | ESE 3 | — | — | — | — | — | — | E 4 | E 10 | ESE 6 | — | — | — | — | SSE 4 | SSE 4 | SE 4 | SE 5 | — | — |
3 | 5 | — | — | — | — | — | — | 14 | 319 | 74 | — | — | — | — | 7 | 3 | 9 | 23 | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 22 | 49 | 0 | 16 | 0 | 0 | 16 | 49 | 22 | 260 | 260 | 22 | 22 | 497 | 16 | 22 | 605 | 16 | 49 | 967 | 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.











