Ikumi Beach Surf Break

Lat Long: 33.53° N 134.28° E

Ikumi Beach Surf Forecast and Surf Report

Issued: 8 pm 27 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 27 Aug 2026:

  • Best quality surf: Wednesday 2 Sep, 9PM (local time) - 10ft (3.0m), 11s period, SSE swell with cross-shore winds.
  • Most powerful swell: Thursday 3 Sep, 12AM (local time) - 13ft (4.0m), 12s period, S swell with 4,054 kJ wave energy.
  • Next surfable swell (1★+): Friday 28 Aug, 6AM (local time) - 4ft (1.2m), 8s 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 28) at 6AM. The primary swell is predicted to be 1.2m and 8s period with a secondary swell of 0.4m and 8s. Another secondary swell of 0.4m and 10s is also forecast. 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 4.0m 12s and forecast to arrive on Thursday (Sep 03) at 12AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.8m 4s period and expected on Saturday (Aug 29) at 6AM.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+) 6AM (Fri 28th Aug)4ft (1.2m) 8s
Best Surf 9PM (Wed 2nd Sep)10ft (3.0m) 11s
Most Powerful12AM (Thu 3rd Sep)13ft (4.0m) 12s

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


The Lowdown

Alright mate, this is Rusty, checkin’ in with a look at what’s comin’ down the line for Ikumi Beach.

Alright mate, so lookin’ at the next couple of weeks for Ikumi Beach, it’s a real mixed bag. We got a bit of a slow start, but there’s some serious firepower on the horizon if you’re patient. The real standout window is lookin’ like it’s gonna be the second week of September, with some proper sized, clean groundswell. But you gotta be an experienced surfer for that, it gets big.

First up, Friday the 28th of August. We’ve got a small 3ft swell from the SSW, period of 8 seconds. The combined swell energy is moderate at 201. It’s clean with a light cross-off breeze, so the morning session is the pick of the day, but the waves are pretty ordinary, nothin’ to write home about. The afternoon gets a bit sketchy with a risk of storms.

Saturday the 29th and Sunday the 30th are pretty flat and poor. The swell drops right off, and the wind gets messy. Sunday the 30th is a write-off with tiny 2ft swell and weak energy (75). Not worth paddlin’ out.

Monday the 31st sees a bit of a pulse, 3ft to 4ft from the S, period stretches to 9-10 seconds, so there’s some moderate energy (230-297). But the wind is onshore or cross-onshore, makin’ it a marginal session at best. Nothin’ to get excited about.

Now, things start to fire up from Tuesday the 1st of September, but it’s ugly. We get a building swell, 6ft up to 8ft from the SSE, but the wind is a strong cross-onshore with stormy conditions. It’s gonna be a choppy, messy mess. The combined energy jumps right up into the strong range (600 to 1677), but it’s a write-off for paddle surfing. Honestly, this setup looks way more interesting for kite surfing than a traditional surf, especially as it gets over 8ft on Wednesday the 2nd with more rain.

Thursday the 3rd of September is the peak size, with a massive 12ft swell from the S on the morning, period at 11 seconds. The energy is huge at 4949. The wind is a gentle cross-shore, so it’s clean. But mate, this is a beast. It’s way too big for this break for anyone but absolute experts. The forecast even says so.

The weekend of the 5th and 6th of September is still solid, with 7ft to 8ft swell, but still a bit wind-affected. Saturday afternoon the 5th cleans up with a cross-off breeze, and you get some good waves there.

Now for the main event. Monday the 7th of September through to Thursday the 10th is where it’s at. Monday morning the 7th, we’ve got a 8ft swell from the SSE, period of 10 seconds, and a light cross-off breeze. The energy is strong at 1688, and the conditions are listed as excellent for experienced surfers. That’s your first true standout. Tuesday the 8th morning is even better – glassy conditions with a 7ft swell from the SSE. That’s a magic window. And then Thursday the 10th, both morning and afternoon are absolutely glassy, with 6ft to 7ft swell from the SE. The combined energy is moderate (724-674), but with zero wind and a glassy surface, those waves will be perfect. The water temp is about average for this time of year, so nothin’ unusual there.

After that, it fades off. Friday the 11th and Saturday the 12th see the swell dropping back down to 4ft, and the quality drops off again.

So, the best bets are crystal clear. If you’re an experienced surfer, don’t miss the morning of Monday the 7th of September, or the glassy session on Tuesday the 8th of September. But the absolute cream of the crop is Thursday the 10th of September – all day, glassy, clean 6-7ft waves. That’s a day you’ll remember. Crowds are often at Ikumi, so you’ll have company, but for waves like that, it’ll be worth it.

Rusty out.

Short Range Forecast

Light rain (total 4mm), mostly falling on Fri afternoon. Warm (max 32°C on Sat morning, min 26°C on Fri night). Wind will be generally light.

Days 5-7 Weather Summary

Heavy rain (total 81mm), heaviest during Tue afternoon. Warm (max 29°C on Mon morning, min 25°C on Sun night). Wind will be generally light.

Friday
28
Saturday
29
Sunday
30
Monday
31
Tuesday
1
Wednesday
2
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
2
2
1
1
1
0
1
0
0
1
1
1
1
0
0
0
1
1
!
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.2
S
9
0.9
SSW
8
0.9
SSW
8
0.8
SSW
8
1
SSW
8
0.9
SSW
7
0.7
S
7
0.6
S
7
0.7
S
7
0.5
S
11
1
S
10
1.2
S
9
1.6
SSE
10
1.8
SSE
10
2.3
SSE
9
2.2
SSE
10
2.4
SSE
10
2.5
SSE
10
4
S
12
Wave Graph
Metric surfscale
Energy kJ
235
85
85
73
110
97
53
39
52
64
194
246
523
567
904
885
1140
1406
4054
Wind (km/h)
10
WSW
10
SW
10
SW
10
W
10
SW
15
SW
10
W
5
SSW
15
S
5
W
5
ENE
10
E
15
ESE
20
SE
20
SSE
20
SSE
20
SSE
20
S
20
S
Wind State
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross
cross
glassy
cross-on
on
on
cross-on
cross-on
cross-on
cross-on
cross-on
cross
High Tide
5:52AM1.99m
6:40PM1.94m
6:31AM2.03m
7:05PM1.95m
7:10AM2.03m
7:30PM1.95m
7:49AM1.98m
7:55PM1.93m
8:29AM1.89m
8:20PM1.90m
9:13AM1.77m
8:48PM1.85m
Low Tide
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
2:23PM0.74m
2:49AM0.46m
2:53PM0.90m
part cloud
thunderstorm
thunderstorm
part cloud
clear
part cloud
part cloud
clear
clear
clear
clear
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
rain showers
rain showers
thunderstorm
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:33
5:33
5:33
5:35
5:35
5:35
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:36
6:34
6:32
6:31
6:30
6:29
6:28
 mm
1
3
1
12
13
14
24
8
9
19
Temp °C
27
31
30
26
32
31
27
31
30
26
29
29
27
27
27
27
27
27
27
Feels °C
31
34
35
30
34
33
31
33
32
30
32
33
31
30
29
30
30
29
30
  • 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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