Ikumi Beach Surf Break

Lat Long: 33.53° N 134.28° E

Ikumi Beach Surf Forecast and Surf Report

Issued: 8 am 16 Aug 2026 (local time)

Forecast update in  hr  min

Today's Ikumi Beach sea temperature is
28.4° C
0.7° 

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 16 Aug 2026:

  • Best quality surf: Saturday 22 Aug, 9PM (local time) - 4.5ft (1.3m), 10s period, SSW swell with cross-offshore winds.
  • Most powerful swell: Friday 21 Aug, 6AM (local time) - 4.5ft (1.4m), 11s period, S swell with 485 kJ wave energy.
  • Next surfable swell (1★+): Monday 17 Aug, 6AM (local time) - 3.5ft (1.0m), 5s period with SE 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 Monday (Aug 17) at 6AM. The primary swell is predicted to be 1.0m and 5s period with a secondary swell of 0.5m and 8s. Another secondary swell of 0.4m and 11s is also forecast. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Ikumi Beach in the next 16 days are 1.4m 11s and forecast to arrive on Friday (Aug 21) at 6AM. Winds are predicted to be onshore at the time the swell arrives.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+) 6AM (Mon 17th Aug)3.5ft (1.0m) 5s
Best Surf 9PM (Sat 22nd Aug)4.5ft (1.3m) 10s
Most Powerful 6AM (Fri 21st Aug)4.5ft (1.4m) 11s

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


The Lowdown

Alright folks, Rusty here. Let’s have a look at what’s coming up for Ikumi Beach. Straight up, the first week is a bit of a struggle. We have a few small windows of surfable waves, but nothing that’ll get your heart pumping. The real standout is a solid pulse of swell that arrives in the second week, but there’s a catch.

The Overall Pattern

We’re looking at a long 16-day window here, but the good stuff doesn’t really start cranking until the 24th of August. The first week is mostly a write-off with tiny, choppy, or onshore conditions. The water temp is sitting at a warm 83°, which is about average for the time of year, so you won’t need a thick wetsuit.

The Early Days (16th – 23rd August)

Honestly, don’t wet your wetsuit for the first week. From Sunday the 16th right through to the 23rd, it’s a real mixed bag of poor surf. The swell is small, the wind is mostly onshore, and the energy is weak. You’ll see morning swells of just 1 ft to 5 ft, but the wind is ruining it. The one tiny glimmer is on Tuesday the 18th morning, with a 2 ft swell from the ESE and glassy conditions. It’s surfable, but ordinary. The combined energy barely gets into the low hundreds, so it’s limp. The rest of the week is a write-off with rain, thunderstorms, and cross-onshore winds. The swell tries to pick up a bit on the 21st and 22nd, with a 5 ft S swell and a little more energy (539), but the wind is still messy. The 22nd and 23rd morning sessions show a clean, cross-offshore wind, but the swell is only 3 ft to 4 ft. It’s not a standout, just a passable session if you’re desperate.

The Real Standout – The Big Swell Arrives (24th – 31st August)

Hold onto your board, because from the 24th of August, the ocean wakes up. This is your best bet, and it’s a big one. On Monday the 24th morning, Ikumi Beach gets a sweet 6 ft swell from the SE with a very long period of 16 seconds. The combined energy is a massive 1842, and the wind is glassy. This is excellent surf for experienced surfers. The swell direction is a perfect ESE, which matches the break’s optimum. It’s a groundswell with that super long period, so expect proper, well-shaped waves with long lulls between sets. The crowds are often here, so you’ll likely have company.

Tuesday the 25th morning is even better – an 8 ft SE swell, period of 15 seconds, and still glassy. The energy is 2654, and it’s another excellent session for experienced surfers. This is the peak of the good stuff before it gets too big.

The Caveat – Too Big for Most

After the 25th, the swell just keeps building. By the 26th morning, it’s 12 ft from the SSE, and the wind is already cross-onshore. The energy is a staggering 5905, but it’s simply too big for this break. The same goes for the rest of the week. The 27th, 28th, 29th, 30th, and 31st all see swells of 10 ft to 21 ft with energy values in the thousands – even tens of thousands. The wind is clean on some days, but the guidance says it’s too big for Ikumi Beach. This is strictly for experts only, and honestly, it’s more of a tow-in or a look-at-from-the-beach kind of swell. For a beach break like this, with that long period, the waves might be closing out and pretty dangerous.

So, to sum it up: your best window is the morning of the 24th and 25th of August. Glassy, clean, solid groundswell, and perfect for experienced surfers. After that, it’s a monster swell that’s best left alone unless you’re a pro. The first week is a dud. Don’t hold your breath.

Rusty.

Short Range Forecast

Heavy rain (total 28mm), heaviest during Sun afternoon. Warm (max 28°C on Mon afternoon, min 25°C on Sun night). Wind will be generally light.

Days 4-6 Weather Summary

Light rain (total 7mm), mostly falling on Wed morning. Warm (max 28°C on Wed afternoon, min 25°C on Wed night). Wind will be generally light.

Sunday
16
Monday
17
Tuesday
18
Wednesday
19
Thursday
20
Friday
21
Saturday
22
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
1
0
1
0
0
1
1
0
1
0
0
1
0
0
2
2
2
2
2
1
3
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.3
ESE
6
1.5
ESE
6
1.3
ESE
6
0.9
SE
5
0.4
SE
11
0.4
SE
11
0.7
ESE
8
0.9
SE
5
0.4
SE
10
0.4
SE
10
0.4
SE
10
0.9
ESE
5
0.6
S
10
0.9
S
9
1.2
S
10
1.4
S
11
1.4
S
11
1.3
S
10
1.2
S
10
1.1
SSW
10
1.3
SSW
9
Wave Graph
Metric surfscale
Energy kJ
100
164
108
45
30
30
62
33
35
33
25
39
66
129
257
466
434
333
284
235
293
Wind (km/h)
10
ESE
15
SE
10
ESE
5
SE
10
SE
5
SE
5
ESE
10
SSE
0
ESE
5
E
10
SE
5
WNW
5
SE
10
SSE
5
SW
10
SSE
10
SSW
5
WSW
10
SW
20
SW
10
WSW
Wind State
on
on
on
on
on
glassy
glassy
cross-on
glassy
on
cross-on
glassy
cross-on
cross-on
glassy
cross-on
cross
cross-off
cross-off
cross-off
cross-off
High Tide
8:04PM1.93m
8:16AM1.92m
8:30PM1.90m
8:59AM1.82m
8:58PM1.86m
9:48AM1.68m
9:27PM1.81m
10:51AM1.55m
10:01PM1.74m
12:28PM1.45m
10:49PM1.66m
2:49PM1.47m
00:11AM1.59m
Low Tide
1:52PM0.45m
2:09AM0.57m
2:23PM0.59m
2:46AM0.55m
2:54PM0.76m
3:27AM0.55m
3:26PM0.93m
4:16AM0.59m
4:02PM1.10m
5:20AM0.63m
4:54PM1.26m
6:46AM0.65m
6:52PM1.37m
rain showers
mod rain
rain showers
rain showers
thunderstorm
rain showers
rain showers
thunderstorm
clear
thunderstorm
part cloud
clear
part cloud
thunderstorm
thunderstorm
thunderstorm
thunderstorm
clear
part cloud
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:24
5:24
5:26
5:26
5:26
5:28
5:28
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:49
6:46
6:45
6:45
6:44
6:43
6:42
 mm
6
9
7
1
1
2
1
1
1
2
1
2
1
Temp °C
26
26
26
27
28
26
28
27
26
27
28
26
28
28
26
27
28
26
30
30
26
Feels °C
30
29
29
31
31
31
33
31
31
31
32
31
33
33
32
32
32
31
32
32
30
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
Map placeholder
How to use the Wavefinder 
submit an eyeball surf report

Quick surf report for Ikumi Beach:

join our community of surf reporters

FREE! Surf-Forecast.com widget for your website

The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Ikumi Beach surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.


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.

Nearest locationNearest