Ikumi Beach Surf Break

Lat Long: 33.53° N 134.28° E

Ikumi Beach Surf Forecast and Surf Report

Issued: 2 am 25 Aug 2026 (local time)

Forecast update in  hr  min

Today's Ikumi Beach sea temperature is
28.8°C
1.1° 

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 24 Aug 2026:

  • Best quality surf: Tuesday 25 Aug, 9AM (local time) - 10ft (3.0m), 14s period, SSE swell with cross-onshore winds.
  • Most powerful swell: Tuesday 25 Aug, 9AM (local time) - 10ft (3.0m), 14s period, SSE swell with 3,875 kJ wave energy.
  • Next surfable swell (1★+): Tuesday 25 Aug, 9AM (local time) - 10ft (3.0m), 14s period with SSE 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 Tuesday (Aug 25) at 9AM. The primary swell is predicted to be 3.0m and 14s period with a secondary swell of 0.2m and 15s. The wind is predicted to be cross-onshore as the swell arrives.

The most powerful waves expected at Ikumi Beach in the next 16 days are 3.0m 14s and forecast to arrive on Tuesday (Aug 25) 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 0.9m 5s period and expected on Saturday (Aug 29) at 9PM.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+) 9AM (Tue 25th Aug)10ft (3.0m) 14s
Best Surf 9AM (Tue 25th Aug)10ft (3.0m) 14s
Most Powerful 9AM (Tue 25th Aug)10ft (3.0m) 14s

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


The Lowdown

Alright, let’s run through this again, now in feet and knots.

So, Rusty here, and Ikumi Beach is on the table for the next 16 days. It’s a mixed bag, with one proper standout that’s only for the brave.

Kick-off is Tuesday morning on the 25th of August. We’ve got a solid 10ft swell rolling in from the SSE with a 14-second period – that’s a long-period groundswell with plenty of punch. The combined energy is reading a massive 4834, so you’ll feel that. The wind is light cross-onshore, not glassy, but not ruining it. Water temp is 29°, about 1° warmer than usual for late August.

Big problem: Ikumi Beach is an inconsistent beginner spot. 10ft waves are not beginner friendly – this is expert-only territory. The swell angle is SSE, and the spot prefers it from ESE, so it’s a bit off. Still, for a surfer with the skills and the nerve, this Tuesday morning is the best shot in the whole outlook.

From there, it's mostly downhill. Tuesday afternoon drops to 8ft but with stronger wind and a much lower rating. From Wednesday the 26th through the end of August, waves hover between 5ft and 2ft, with cross and cross-off breezes, and energy numbers falling fast – down into the hundreds. There are a couple of glassy mornings on the 28th and 29th, but the swell is tiny, only 4ft and then 2ft. It’s surfable, but nothing to write home about. And crowds are often here, so even those small clean windows get busy.

Then it’s a long dry spell. From the 31st of August through the first days of September, the wind turns onshore or cross-onshore, the swell direction goes against what the break likes, and it’s all poor or marginal – days and days of nothing good. Some waves pop up around 5ft to 8ft, but the wind’s wrecking them. The energy numbers are low, sometimes under 1000. That’s a solid week plus of waiting it out.

Finally, on Tuesday morning the 8th of September, we get a small clean window: 4ft from the SE with light cross-off winds. It’s clean but tiny, with low energy at 279. Good for a beginner who wants a safe paddle without any drama, but not a standout by any measure.

So the bottom line: for experts, be on the water early Tuesday, the 25th of August. That’s the one big day. For everyone else, you’re looking at a long stretch of small, choppy, or just plain poor conditions. It’s a lean run at Ikumi.

Rusty.

Short Range Forecast

Light rain (total 3mm), mostly falling on Wed morning. Warm (max 31°C on Tue afternoon, min 26°C on Tue night). Wind will be generally light.

Days 4-6 Weather Summary

Moderate rain (total 14mm), heaviest on Sun afternoon. Warm (max 31°C on Sat afternoon, min 26°C on Fri night). Wind will be generally light.

Tuesday
25
Wednesday
26
Thursday
27
Friday
28
Saturday
29
Sunday
30
Monday
31
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
!
3
4
3
2
3
2
0
2
2
1
1
1
1
1
1
1
1
1
0
0
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
3
SSE
14
2.5
SSE
13
2.5
SSE
12
1.9
S
12
1.6
S
12
1.3
SSW
11
1
SSW
10
1.2
SSE
10
1.2
S
9
1.2
S
8
1.1
S
8
0.7
SSE
7
0.6
SSW
8
0.9
SSW
8
0.7
SSW
8
0.6
S
8
0.6
S
8
0.4
SE
10
0.4
SSW
8
0.8
ESE
5
0.8
ESE
5
Wave Graph
Metric surfscale
Energy kJ
3875
2005
1961
1048
711
353
190
282
240
191
153
49
48
81
58
42
44
38
19
34
31
Wind (km/h)
5
S
15
S
10
W
10
S
15
SSW
10
WSW
10
SW
15
SSW
10
WSW
0
NNW
5
SW
5
WNW
5
SSE
15
SW
5
WNW
5
E
5
SW
10
WSW
5
SSE
10
SE
5
ENE
Wind State
cross-on
cross-on
cross-off
cross-on
cross
cross-off
cross-off
cross
cross-off
glassy
glassy
glassy
glassy
cross-off
off
glassy
cross-off
cross-off
glassy
on
cross-on
High Tide
5:22PM1.79m
4:22AM1.80m
5:50PM1.85m
5:10AM1.91m
6:16PM1.90m
5:52AM1.99m
6:40PM1.94m
6:31AM2.03m
7:05PM1.95m
7:10AM2.03m
7:30PM1.95m
7:49AM1.98m
7:55PM1.93m
Low Tide
10:25AM0.41m
10:53PM1.08m
11:08AM0.34m
11:28PM0.93m
11:46AM0.31m
00:00AM0.79m
12:20PM0.32m
00:32AM0.66m
12:52PM0.37m
1:04AM0.56m
1:23PM0.47m
1:36AM0.48m
1:53PM0.59m
2:11AM0.45m
clear
clear
clear
rain showers
part cloud
part cloud
part cloud
part cloud
thunderstorm
thunderstorm
thunderstorm
part cloud
thunderstorm
thunderstorm
clear
part cloud
thunderstorm
thunderstorm
clear
clear
rain showers
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:31
5:31
5:31
5:33
5:33
5:33
5:35
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:37
6:37
6:36
6:34
6:32
6:31
6:30
 mm
1
2
1
1
1
1
6
4
7
Temp °C
30
31
26
31
31
27
31
31
27
29
28
26
30
31
27
29
29
26
30
29
26
Feels °C
32
34
31
34
34
31
33
33
32
34
34
30
33
34
32
34
34
31
34
32
31
  • Map Icons:
  • Break
  • 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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