Ikumi Beach Surf Break

Lat Long: 33.53° N 134.28° E

Ikumi Beach Surf Forecast and Surf Report

Issued: 8 pm 20 Aug 2026 (local time)

Forecast update in  hr  min

Today's Ikumi Beach sea temperature is
28.2° C
0.4° 

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 20 Aug 2026:

  • Best quality surf: Monday 24 Aug, 6PM (local time) - 10ft (3.0m), 17s period, SE swell with glassy winds.
  • Most powerful swell: Tuesday 25 Aug, 6PM (local time) - 16ft (5.0m), 16s period, SSE swell with 11,171 kJ wave energy.
  • Next surfable swell (1★+): Friday 21 Aug, 12AM (local time) - 2.5ft (0.8m), 9s period with S 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 Friday (Aug 21) at 12AM. The primary swell is predicted to be 0.8m and 9s period with a secondary swell of 0.4m and 10s. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Ikumi Beach in the next 16 days are 5.0m 16s and forecast to arrive on Tuesday (Aug 25) 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 11s period and expected on Thursday (Aug 27) at 6AM.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+)12AM (Fri 21st Aug)2.5ft (0.8m) 9s
Best Surf 6PM (Mon 24th Aug)10ft (3.0m) 17s
Most Powerful 6PM (Tue 25th Aug)16ft (5.0m) 16s

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


The Lowdown

Alright, Rusty here. Let's talk about the surf at Ikumi Beach for the next couple of weeks, and I gotta be straight with you – it's a bit of a slow burner. We’re looking at a beach that’s exposed, but it’s also inconsistent, and the crowds can be a drama when there’s anything worth riding.

We’re kicking off Thursday the 20th with just 1ft of weak, short-period swell (57 total energy) and a cross-on breeze, so honestly, don't bother paddling out. Friday the 21st through to Sunday the 23rd is a frustrating tease. The mornings are going to be *glassy* – dead flat wind – and you'll see some tiny 3ft to 3ft waves from the south with moderate energy (between 133 and 175), but it’s really just small, ordinary surf that won’t hold your interest.

Now, here’s where things get interesting. Monday the 24th of August morning is the standout of the whole outlook. We’re talking a clean, glassy dawn with a solid 6ft groundswell from the SE, and that period is a proper 16 seconds. That means real energy – you can feel it in the 2350 combined energy reading. This is for the experienced crew, though; that long period will wrap in nicely, but remember it’s a beach break, so it might be a bit straight. The water is sitting at a warm 83°, which is pretty average for this time of year.

By Monday afternoon and into Tuesday the 25th, the swell gets huge, jumping to 8ft and then up to 16ft with a monster 11720 energy. The problem is, it’s too big for this spot, with a messy cross-on wind. This is strictly a big-wave specialist zone, or frankly, it looks more interesting for kite surfing than paddle surfing through that heavy, lumpy chop. That pattern of oversized, blown-out swell holds through Wednesday the 26th and Thursday the 27th, with some rain and strong winds.

We get a window again on Friday the 28th of August morning. The wind drops to glassy, and the swell settles at 8ft from the south with a 10-second period and huge energy (3098). This is another call for the experienced surfers only – it’s a great wave, but it’s still a heavy one.

Then, honestly, things go quiet. After that Friday morning, from Saturday the 29th all the way through to the end of the forecast on Friday the 4th of September, we’re looking at poor surf conditions. The swell drops off hard to 5ft and below, and it’s plagued by a constant, moderate to fresh cross-onshore wind from the ENE. It’s going to be choppy and messy with low energy, so don't hold your breath.

So, mark your calendar: Monday morning, August 24th is the pick of the lot for a clean, glassy session on a solid long-period swell. Friday morning, August 28th is the backup for the experienced crew.

Rusty.

Short Range Forecast

Light rain (total 3mm), mostly falling on Fri afternoon. Warm (max 30°C on Sat morning, min 25°C on Thu night). Wind will be generally light.

Days 5-7 Weather Summary

Heavy rain (total 240mm), heaviest during Wed morning. Warm (max 29°C on Mon morning, min 25°C on Sun night). Winds increasing (calm on Sun night, near gales from the SE by Wed afternoon).

Friday
21
Saturday
22
Sunday
23
Monday
24
Tuesday
25
Wednesday
26
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
1
1
0
1
1
0
1
1
0
2
3
4
!
!
!
0
0
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)
0.8
S
9
0.9
S
9
0.9
S
10
0.8
SSW
9
0.8
SSW
9
0.7
SSW
9
0.7
SSW
8
0.6
SSW
9
0.6
SSW
9
0.5
SE
15
1.8
SE
16
2.5
SE
17
3.5
SSE
17
4.5
SSE
16
4.5
SSE
16
4
SSE
14
3
SSE
12
3
SSE
10
2.5
SSE
10
Wave Graph
Metric surfscale
Energy kJ
99
127
145
108
108
80
75
61
58
118
1815
4040
7442
10165
10594
7241
2632
1930
1233
Wind (km/h)
5
W
5
ESE
10
SSW
5
W
5
ESE
15
SSW
5
W
5
SE
10
S
5
W
5
E
10
ESE
5
NNE
10
NE
15
ENE
25
E
50
ESE
55
SE
55
S
Wind State
cross-off
glassy
cross
glassy
glassy
cross
glassy
glassy
cross-on
glassy
on
on
glassy
cross-on
cross-on
cross-on
on
on
cross-on
High Tide
10:01PM1.74m
12:28PM1.45m
10:49PM1.66m
2:49PM1.47m
00:11AM1.59m
4:10PM1.59m
2:01AM1.59m
4:51PM1.70m
3:24AM1.68m
5:22PM1.79m
4:22AM1.80m
5:50PM1.85m
Low Tide
5:20AM0.63m
4:54PM1.26m
6:46AM0.65m
6:52PM1.37m
8:20AM0.60m
9:07PM1.34m
9:32AM0.51m
10:12PM1.22m
10:25AM0.41m
10:53PM1.08m
11:08AM0.34m
11:28PM0.93m
clear
part cloud
thunderstorm
thunderstorm
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
clear
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:28
5:28
5:30
5:30
5:31
5:31
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:44
6:43
6:42
6:39
6:38
6:37
6:37
 mm
2
1
2
52
90
96
291
Temp °C
26
29
29
26
30
30
26
30
30
26
29
29
26
29
29
26
27
27
27
Feels °C
31
33
33
31
34
33
31
33
34
31
33
33
31
31
31
27
24
22
23
  • 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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