Ikumi Beach Surf Break

Lat Long: 33.53° N 134.28° E

Ikumi Beach Surf Forecast and Surf Report

Issued: 2 am 17 Aug 2026 (local time)

Forecast update in  hr  min

Today's Ikumi Beach sea temperature is
28.3° 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 17 Aug 2026:

  • Best quality surf: Monday 24 Aug, 6AM (local time) - 4.5ft (1.3m), 17s period, SE swell with cross-offshore winds.
  • Most powerful swell: Monday 24 Aug, 9AM (local time) - 5.5ft (1.7m), 17s period, SE swell with 1,690 kJ wave energy.
  • Next surfable swell (1★+): Monday 17 Aug, 9PM (local time) - 2.5ft (0.7m), 9s 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 9PM. The primary swell is predicted to be 0.7m and 9s period with a secondary swell of 0.4m and 8s. Another secondary swell of 0.7m and 5s 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 1.7m 17s and forecast to arrive on Monday (Aug 24) at 9AM. Winds are predicted to be cross-offshore at the time the swell arrives.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+) 9PM (Mon 17th Aug)2.5ft (0.7m) 9s
Best Surf 6AM (Mon 24th Aug)4.5ft (1.3m) 17s
Most Powerful 9AM (Mon 24th Aug)5.5ft (1.7m) 17s

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


The Lowdown

Alright, this is Rusty.

Look, I’m gonna level with you. We’ve got a real mixed bag coming up here at Ikumi Beach. The first week or so is pretty much a write-off. We’re staring down a stretch of tiny, weak, and messy conditions. The energy is barely there, with combined swell energy readings sitting in the double digits and low triple digits (139, 81, 61) for days. That’s barely a ripple. The wind is mostly onshore or cross-onshore, and the swell is coming from the SE with a short, weak period. It’s just not worth paddling out for. This goes on from Monday the 17th right through to around Thursday the 20th.

Now, things start to look a little more interesting around Friday the 21st. We get a bump in swell energy up into the mid-300s (315, 351), but the conditions are still described as marginal. The wind is light, but still cross-onshore. It’s surfable, but nothing to write home about. This sort of ordinary, borderline quality holds through the weekend and into Monday the 24th.

Here’s where it gets a bit wild. On Monday morning the 24th, a proper groundswell starts to show up. The swell direction shifts to the SE, the period jumps to 17 seconds, and the combined energy skyrockets to 2235. This is a serious pulse of energy. The wind is a clean cross-offshore from the SW, so the waves will have some shape. The swell is hitting 6 ft, which is getting solid for an inconsistent, exposed beginner break like Ikumi Beach. It’s going to be too much for learners, and the long 17-second period means it could be a bit tricky and walled-off here.

Then, Tuesday the 25th rolls in. This is the standout, but with a massive caveat. We’ve got glassy conditions with an 12 ft swell from the SSE and a 16-second period. The combined energy is a massive 5383. That is a lot of water moving. The problem is, it’s too big for Ikumi Beach. This is expert territory only. If you are a seasoned charger on a big board and know this break intimately, the glassy morning on the 25th is the best you’ll see, but for 99% of surfers, it’s a stay-on-the-beach day. The same goes for Wednesday the 26th and Thursday the 27th, with 10 ft to 12 ft swell and energy readings staying well over 2500. It’s just too much power for this setup.

We roll into the last week of August and it’s still big and messy. Friday the 28th and Saturday the 29th see the swell drop a touch to around 8 ft to 8 ft from the SSW, but the wind is cross-on or onshore, making it choppy. The energy is still very strong (2251, 2804), but the quality just isn’t there. Sunday the 30th is similar, with shorter 8-second period swell making it feel weak and bumpy.

Finally, we look at Monday the 31st of August. This is another absolute monster. We’re looking at a 13 ft to 16 ft swell from the ESE with a 17-second period. The combined energy readings are insane: 8968 and 14178. Again, this is way, way too big for Ikumi Beach. This is pure, unadulterated big-wave territory, and the wind isn't even clean.

The very last day in the outlook, Tuesday the 1st of September, the swell drops back to a more manageable 6 ft from the ESE with a 12-second period. The energy is still high at 2108, but it’s a step in the right direction. Still, the wind is cross-onshore, so don’t expect perfection.

So, the honest truth? For the next week, save your energy. The best window is the glassy but gigantic Tuesday the 25th. If you’re an expert, that’s your window, but be prepared for a beating. For everyone else, keep an eye on the long-range forecasts for the first week of September, as that massive energy finally looks like it might start to drop.

- Rusty

Short Range Forecast

Moderate rain (total 10mm), heaviest on Mon morning. Warm (max 29°C on Mon morning, min 25°C on Mon night). Wind will be generally light.

Days 4-6 Weather Summary

Moderate rain (total 16mm), heaviest on Thu afternoon. Warm (max 29°C on Sat morning, min 25°C on Thu night). Wind will be generally light.

Monday
17
Tuesday
18
Wednesday
19
Thursday
20
Friday
21
Saturday
22
Sunday
23
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
0
1
0
0
1
0
0
1
0
0
1
1
1
2
1
1
1
0
1
2
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
SE
5
0.4
SE
11
0.7
SE
9
0.4
SE
11
0.4
SE
10
0.4
SE
10
0.8
ESE
8
0.4
SE
10
0.4
SE
10
0.7
E
7
0.6
S
9
0.6
ESE
11
1.1
S
10
1.2
S
10
1.2
S
10
1.1
S
10
1
S
9
0.9
SSW
9
0.8
SSW
9
0.8
SSW
9
0.9
SE
14
Wave Graph
Metric surfscale
Energy kJ
47
30
79
29
28
27
71
27
25
45
52
86
264
284
290
235
180
153
110
94
322
Wind (km/h)
5
ESE
10
SE
0
E
10
ESE
10
SE
5
ESE
10
ESE
10
SE
0
SE
5
ESE
10
SSE
0
W
5
ESE
10
SSE
0
NW
5
SSE
15
S
5
SW
15
SSW
15
SW
10
WSW
Wind State
on
cross-on
glassy
on
on
glassy
on
cross-on
glassy
on
cross-on
glassy
on
cross-on
glassy
cross-on
cross
cross-off
cross
cross-off
cross-off
High Tide
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
4:10PM1.59m
2:01AM1.59m
Low Tide
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
8:20AM0.60m
9:07PM1.34m
rain showers
clear
rain showers
thunderstorm
part cloud
thunderstorm
thunderstorm
part cloud
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
part cloud
part cloud
thunderstorm
part cloud
rain showers
thunderstorm
thunderstorm
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:24
5:26
5:26
5:26
5:28
5:28
5:30
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:46
6:45
6:45
6:44
6:43
6:42
6:39
 mm
1
3
1
2
1
2
2
7
2
3
1
1
2
1
Temp °C
29
29
26
28
28
26
28
28
26
28
28
26
28
28
26
29
29
26
28
28
26
Feels °C
32
32
31
31
31
31
32
32
32
33
33
32
33
32
32
32
32
30
31
31
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