Ikumi Beach Surf Break

Lat Long: 33.53° N 134.28° E

Ikumi Beach Surf Forecast and Surf Report

Issued: 2 am 30 Aug 2026 (local time)

Forecast update in  hr  min

Today's Ikumi Beach sea temperature is
29.2°C
1.5° 

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


Ikumi Beach surf forecast from 29 Aug 2026:

  • Best quality surf: Sunday 6 Sep, 6AM (local time) - 11ft (3.5m), 9s period, ESE swell with cross-shore winds.
  • Most powerful swell: Sunday 6 Sep, 9AM (local time) - 11ft (3.5m), 9s period, ESE swell with 2,046 kJ wave energy.
  • Next surfable swell (1★+): Sunday 30 Aug, 6AM (local time) - 2.5ft (0.8m), 7s period with SSW swell.

Best Forecast Surf Conditions for Ikumi Beach this week:

The surf forecast for Ikumi Beach over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Sunday (Aug 30) at 6AM. The primary swell is predicted to be 0.8m and 7s period with a secondary swell of 0.4m and 11s. The wind is predicted to be offshore as the swell arrives.

The most powerful waves expected at Ikumi Beach in the next 16 days are 3.5m 9s and forecast to arrive on Sunday (Sep 06) at 9AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.7m 4s period and expected on Sunday (Aug 30) at 6AM.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+) 6AM (Sun 30th Aug)2.5ft (0.8m) 7s
Best Surf 6AM (Sun 6th Sep)11ft (3.5m) 9s
Most Powerful 9AM (Sun 6th Sep)11ft (3.5m) 9s

Table - best surf conditions forecast for Ikumi Beach over the next 16 days.


The Lowdown

Alright, Rusty here, let’s get into it. The next couple of weeks are a bit of a mixed bag for Ikumi Beach. The first few days are pretty lackluster, with tiny, weak swells and less-than-ideal winds. But then, things start to ramp up big time, and by the second week, we’re looking at some serious, heavy groundswell. However, there’s a catch – that swell might just be too much for this spot.

The first real sniff of decent surf hits on Wednesday morning, 2nd of September. We’ve got a 3ft swell out of the SSE, with a period of 8 seconds. The combined energy is moderate (214), and the wind is glassy – dead calm. That’s a major positive. The water is about average for this time of year. It’s small, but it’s clean and surfable. This is your best bet for a fun, easy session for the first week. It’s a good one for the beginners, too, as the swell is well under 5ft.

Then, Friday morning, 4th of September, we see a bit more size coming in. A 3ft ESE swell, period 8 seconds, with a gentle offshore breeze making it clean. The energy is moderate (222). It’s still not huge, but a clean wave with that wind is always a good thing. It’s a solid option.

After that, be warned. The surf jumps up significantly. From Saturday, 5th of September, the swell gets bigger and bigger. Saturday morning sees a 6ft ESE swell (518 energy), and by afternoon it’s an 8ft ESE swell (1046 energy). The wind is onshore or cross-shore, so it’s going to be messy. That’s moving into expert-only territory, but the wind is a problem.

The real big stuff arrives from Sunday, 6th of September. We’re talking 10ft ESE swells, with periods of 10 seconds, and combined energy well over 1600. The wind is onshore and strong – 15 mph. This is not a paddle surfer’s friend. The waves will be big, powerful, and choppy. This setup looks far more interesting for kite surfing than paddle surfing.

The pattern continues. We get a bit of a dip on the 8th and 9th with 6ft to 5ft swells, but the wind is still cross-onshore. Then, from 11th September onwards, it’s game on for the big stuff again. A very long period groundswell arrives. On the 11th, we’re looking at a 6ft S swell with a 14-second period (1757 energy) and a strong cross-offshore wind. The period is significant – it’s a long period groundswell that will be powerful and have long lulls between sets. It’s a good sign for a point break or reef, but at a beach break like this, those long-period swells can break straight and be tricky.

Then the real giants come. Saturday, 12th September, sees a 10ft S swell with a 16-second period and a massive 6546 energy. The wind is light offshore, so it’s clean. But at 10ft, this is for experts only. Sunday, 13th September, is similar with an 12ft S swell (6578 energy) and glassy conditions. Again, massive, clean, but way too big for most. The same goes for Monday, 14th September, with a 10ft S swell (2599 energy) and glassy morning conditions. All these are wind and tide favorable, but the swell is just too big for Ikumi Beach.

So, to sum it up: the standout is Wednesday morning, 2nd September, for a clean, small session. If you’re an expert, the glassy, giant swells of the second week, like Sunday, 13th September, are a spectacle, but the break itself might not handle it. For the rest of us, it’s a week of waiting for cleaner, smaller windows.

Rusty.

Short Range Forecast

Moderate rain (total 11mm), heaviest on Tue night. Warm (max 31°C on Sun morning, min 25°C on Mon night). Wind will be generally light.

Days 4-6 Weather Summary

Moderate rain (total 11mm), heaviest on Wed morning. Warm (max 29°C on Wed afternoon, min 25°C on Wed night). Wind will be generally light.

Sunday
30
Monday
31
Tuesday
1
Wednesday
2
Thursday
3
Friday
4
Saturday
5
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
2
1
1
0
0
1
1
0
1
2
1
2
0
1
2
1
1
1
1
0
2
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1
SSW
7
0.8
SSW
7
0.9
SSW
7
0.7
S
9
0.6
S
8
0.4
SE
10
0.4
ESE
13
0.7
S
8
0.9
SSE
8
1
SSE
8
1.3
SSE
8
1.2
SSE
8
1
SSE
8
0.9
SSE
8
0.9
SSW
10
0.9
SSW
9
1.2
SE
8
0.9
SSW
9
0.9
SSW
11
0.8
SSW
11
2
ESE
9
Wave Graph
Metric surfscale
Energy kJ
114
71
76
73
51
31
59
55
94
140
217
172
130
99
170
138
206
147
170
133
586
Wind (km/h)
5
SSE
10
SW
5
W
5
SSW
15
S
5
WSW
5
SE
10
SE
0
SSW
5
ESE
10
SE
0
WSW
5
E
5
ENE
5
N
10
ENE
10
ENE
10
NNE
10
ENE
15
ENE
15
ENE
Wind State
glassy
cross-off
off
cross
cross
cross-off
glassy
cross-on
glassy
glassy
cross-on
glassy
cross-on
glassy
glassy
cross-on
cross-on
cross
cross-on
cross-on
cross-on
High Tide
7:30PM1.95m
7:49AM1.98m
7:55PM1.93m
8:29AM1.89m
8:20PM1.90m
9:13AM1.77m
8:48PM1.85m
10:06AM1.62m
9:18PM1.78m
11:21AM1.49m
9:56PM1.69m
1:30PM1.45m
10:59PM1.59m
Low Tide
1:23PM0.47m
1:36AM0.48m
1:53PM0.59m
2:11AM0.45m
2:23PM0.74m
2:49AM0.46m
2:53PM0.90m
3:32AM0.50m
3:25PM1.07m
4:25AM0.57m
4:05PM1.22m
5:39AM0.64m
5:24PM1.36m
part cloud
thunderstorm
thunderstorm
clear
clear
clear
clear
clear
rain showers
thunderstorm
thunderstorm
part cloud
thunderstorm
thunderstorm
thunderstorm
part cloud
rain showers
clear
rain showers
thunderstorm
mod rain
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:33
5:35
5:35
5:35
5:37
5:37
5:37
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:31
6:30
6:29
6:28
6:25
6:24
6:23
 mm
4
2
5
3
1
2
1
2
2
2
5
8
Temp °C
31
30
27
31
30
26
30
30
26
28
29
26
28
29
27
29
28
26
27
26
24
Feels °C
36
35
32
34
33
31
33
33
31
32
33
31
32
34
32
33
32
30
30
28
25
  • 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 Ikumi Beach Surf forecast

The above surf forecast table for Ikumi Beach provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Ikumi Beach can be found by selecting the local surf guide option on the grey menu. Our Ikumi Beach 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 (Ikumi Beach) 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 Ikumi Beach 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.

Ikumi Beach is 30 km (19 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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