Osaki Point Surf Break

Lat Long: 33.39° N 134.21° E

Osaki Point Surf Forecast and Surf Report

Issued: 8 am 18 Aug 2026 (local time)

Forecast update in  hr  min

Today's Osaki Point sea temperature is
28.5° C
0.8° 

Osaki Point surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


Osaki Point surf forecast from 18 Aug 2026:

  • Best quality surf: Monday 24 Aug, 6PM (local time) - 6ft (1.9m), 16s period, SE swell with glassy winds.
  • Most powerful swell: Tuesday 25 Aug, 3PM (local time) - 10ft (3.0m), 16s period, SE swell with 4,412 kJ wave energy.
  • Next surfable swell (1★+): Wednesday 19 Aug, 9PM (local time) - 2.5ft (0.7m), 7s period with ESE 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 Wednesday (Aug 19) at 9PM. The primary swell is predicted to be 0.7m and 7s period with a secondary swell of 0.4m and 10s. 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 3.0m 16s and forecast to arrive on Tuesday (Aug 25) at 3PM. Winds are predicted to be cross-onshore at the time the swell arrives.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+) 9PM (Wed 19th Aug)2.5ft (0.7m) 7s
Best Surf 6PM (Mon 24th Aug)6ft (1.9m) 16s
Most Powerful 3PM (Tue 25th Aug)10ft (3.0m) 16s

Table - best surf conditions forecast for Osaki Point over the next 16 days.


The Lowdown

Alright folks, Rusty here. Let’s have a look at what’s cookin’ for Osaki Point over the next couple of weeks.

Right off the bat, it’s a bit of a slow start. We’ve got a few days of small, weak, and messy surf from Tuesday the 18th through to Thursday the 20th. The swell is tiny, around 1 ft to 3 ft, coming from the ESE with a short, weak period of 8 seconds. The combined energy is weak, sitting between 124 and 218. On top of that, the wind is mostly cross-onshore, so the conditions are pretty poor. Not worth paddling out for. The water temperature is 83°, which is about average for this time of year.

Things start to look up a little on Friday the 21st. We get a cleaner S swell, 3 ft to 4 ft, with a period of 9 to 10 seconds, and the combined energy bumps up to moderate (267–279). The wind goes glassy Friday morning and cross-off in the afternoon, which is a real treat. The waves will be clean and fun, though nothing huge. That solid, glassy morning window on Friday is your best bet for the first week. Saturday the 22nd and Sunday the 23rd follow a similar pattern with clean, glassy mornings and smaller S-SSW swell, but the wave heights are a bit smaller by Sunday.

Now, here’s where it gets interesting. The big pulse arrives on Monday the 24th. A long-period groundswell from the SE rolls in, jumping from 3 ft to 5 ft and the period stretches to a very long 16 seconds. The combined energy skyrockets to 751 Monday morning and then 1458 in the afternoon – that’s strong wave energy. The morning looks glassy, but the afternoon gets a bit of a cross-shore wind. This is a promising setup, but that long period (16s) means the waves will be fat and powerful, better for a point or reef, so keep that in mind at a beach-and-reef setup like Osaki.

From Tuesday the 25th through Wednesday the 27th, the swell goes ballistic. We’re talking 8 ft to 15 ft, all from the SSE, with periods still in the 16-17 second range. The combined energy is massive (over 10,000 at its peak). This is serious, heavy water. The problem is the wind: it’s mostly onshore or cross-onshore, creating choppy, tough conditions. This is not for the faint of heart. This is expert-only territory, and honestly, the setup looks more interesting for kite surfing than paddle surfing with that kind of wind and size.

The real standout, the one you want to circle on your calendar, is Friday the 28th. The swell eases a touch to 13 ft, but the wind swings to a clean cross-offshore from the WNW in the morning, and then a solid cross-off from the NW in the afternoon. The combined energy is still very strong (over 6,300), and the period is a grinding 14 seconds. The forecast says “exceptional surf conditions for expert surfers” – and that’s exactly what it is. Big, powerful, clean lines. This is the best on offer.

Saturday the 29th and Sunday the 30th see the swell drop to 10 ft, still big, with the wind turning glassy on Sunday morning. That Sunday morning (August 30th) is another excellent window for experienced surfers, with clean, glassy conditions and a solid 10 ft SSE swell. The energy is still very strong (over 4,600).

Into the first week of September, the swell holds at 8 ft to 12 ft, but the wind gets a bit messier. Keep an eye on the clean morning windows, but the peak of the action is definitely that Friday the 28th and Sunday the 30th.

So, to sum it up: the first few days are a write-off. The middle of the second week gets huge but messy. The absolute standout is Friday the 28th of August – big, clean, and powerful. The Sunday the 30th is a close second. Get on it if you’re an expert.

Rusty.

Short Range Forecast

Light rain (total 9mm), mostly falling on Tue night. Warm (max 28°C on Tue morning, min 25°C on Thu night). Wind will be generally light.

Days 4-6 Weather Summary

Light rain (total 2mm), mostly falling on Fri afternoon. Warm (max 29°C on Sat morning, min 25°C on Fri night). Wind will be generally light.

Tuesday
18
Wednesday
19
Thursday
20
Friday
21
Saturday
22
Sunday
23
Monday
24
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
0
1
0
0
0
1
0
1
2
2
2
2
2
2
1
1
1
2
3
3
3
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.9
ESE
8
1
ESE
8
0.9
ESE
8
0.8
ESE
8
0.9
ESE
8
0.6
ESE
7
0.4
ESE
10
0.4
ESE
10
1
S
9
1
S
9
1.1
S
10
1.1
SSW
9
1
SSW
9
0.9
SSW
9
0.8
SSW
9
0.7
SSW
8
0.7
SSW
8
0.8
SE
15
0.9
SE
16
1.6
SE
16
2.3
SE
16
Wave Graph
Metric surfscale
Energy kJ
125
128
96
87
85
43
38
39
159
160
226
216
177
143
101
72
72
255
411
1330
2635
Wind (km/h)
10
ESE
10
SSE
10
ESE
10
E
10
SSE
5
SSE
10
ESE
10
SSE
5
WSW
5
E
10
S
5
W
5
SE
10
SSW
5
W
5
SE
10
SSW
5
WSW
5
SE
10
SSE
5
E
Wind State
cross-on
cross
cross-on
cross-on
cross
glassy
cross-on
cross-off
glassy
glassy
cross-off
off
glassy
cross-off
glassy
glassy
cross-off
glassy
glassy
cross
on
High Tide
9:15AM1.51m
9:02PM1.65m
10:05AM1.37m
9:25PM1.57m
11:19AM1.24m
9:52PM1.48m
2:11PM1.21m
10:36PM1.40m
4:23PM1.32m
00:37AM1.34m
4:44PM1.42m
2:32AM1.39m
5:05PM1.52m
Low Tide
2:55PM0.76m
3:43AM0.53m
3:19PM0.92m
4:32AM0.59m
3:42PM1.07m
5:43AM0.65m
4:02PM1.20m
7:29AM0.66m
8:20PM1.27m
8:58AM0.58m
9:52PM1.18m
9:53AM0.46m
10:27PM1.07m
rain showers
thunderstorm
thunderstorm
part cloud
part cloud
part cloud
part cloud
thunderstorm
clear
part cloud
thunderstorm
thunderstorm
clear
clear
clear
clear
clear
clear
clear
part cloud
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:26
5:26
5:28
5:28
5:28
5:30
5:31
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:45
6:45
6:44
6:43
6:42
6:40
6:38
 mm
2
2
3
2
1
1
Temp °C
28
28
26
28
28
27
28
28
26
28
28
26
29
29
26
29
29
26
28
28
26
Feels °C
31
32
30
32
32
33
31
32
31
32
31
30
32
32
31
33
33
31
33
32
31
  • Map Icons:
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  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
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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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