Ikumi Beach Surf Break

Lat Long: 33.53° N 134.28° E

Ikumi Beach Surf Forecast and Surf Report

Issued: 2 am 31 Aug 2026 (local time)

Forecast update in  hr  min

Today's Ikumi Beach sea temperature is
29.3°C
1.6° 

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 30 Aug 2026:

  • Best quality surf: Sunday 6 Sep, 6PM (local time) - 10ft (3.0m), 11s period, ESE swell with onshore winds.
  • Most powerful swell: Monday 7 Sep, 6AM (local time) - 11ft (3.5m), 10s period, ESE swell with 2,445 kJ wave energy.
  • Next surfable swell (1★+): Monday 31 Aug, 6AM (local time) - 2.5ft (0.7m), 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 Monday (Aug 31) at 6AM. The primary swell is predicted to be 0.7m and 8s period with a secondary swell of 0.3m and 10s. 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 3.5m 10s and forecast to arrive on Monday (Sep 07) at 6AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.6m 4s period and expected on Monday (Aug 31) at 6AM.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+) 6AM (Mon 31st Aug)2.5ft (0.7m) 8s
Best Surf 6PM (Sun 6th Sep)10ft (3.0m) 11s
Most Powerful 6AM (Mon 7th Sep)11ft (3.5m) 10s

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


The Lowdown

Alright, Rusty here again, switching to feet and inches for you. Let's run through what's shaking at Ikumi Beach.

Right out of the gate, I gotta be straight with you—the next week or so looks pretty grim for a proper paddle. The surf window opens on Sunday the 30th of August with a weak 3ft south-southwest swell, but the real buzzkill is the risk of thunderstorms and that cross-off wind. It’s surfable, but only just. The combined energy is weak, coming in at only 110. Water temp is sitting at 85°, which is a touch warmer than normal for this time of year.

From there, we hit a real dry spell. Monday the 31st through to Saturday the 5th of September is a write-off with poor conditions and tiny, weak swell. You’re looking at a solid six-day gap with nothing worth getting wet for. Just small, junky cross-shore or cross-onshore slop.

Now, things start to get a bit more interesting, but not in a good way for most of us. Sunday the 6th of September sees a big jump in size—5ft of south-east swell—but it’s getting smashed by 30 km/h onshore winds. The energy is strong (1011), but the wind will make it a mess. This pattern holds into Monday the 7th, with 6ft swell but even worse onshore wind and rain. Honestly, this stretch looks way more fun for a kite surfer than a paddle surfer.

The first real bright spot? It’s Tuesday the 8th of September in the afternoon. The wind goes glassy, and we get a clean 6ft south-southeast swell. The energy is moderate to strong at 751. That’s your first proper window for a clean wave. Then Wednesday the 9th of September morning looks like the standout of the whole outlook. Glassy conditions, a solid 8ft east-southeast groundswell with a long 13-second period, and a huge energy reading of 2741. This is excellent surf, but that 8ft is getting into expert territory. The swell direction (ESE) is bang on the optimum for the break. It’ll be powerful, with long gaps between sets, making the paddle out easier. This is the one to circle on your calendar. Just be aware, it's a long-range call, so keep an eye on it.

The morning of Thursday the 10th stays solid with 8ft swell and glassy wind, but by the afternoon it goes a bit cross-onshore. Friday the 11th and Saturday the 12th of September mornings both offer clean, glassy conditions with 6ft swell—great for experienced surfers, but still a solid size.

Hold onto your leash for Sunday the 13th of September. That’s a proper beast of a swell rolling in: 16ft from the south. The combined energy is insane, hitting 6074. It’s glassy, but that’s a triple-overhead day. Only for the very best, and even then, it might be too much for the break.

After that big pulse, Monday the 14th of September settles back down to a fun, glassy 4ft swell. A nice, easy way to end the forecast window.

So, to sum it up: the first week is a dud. The best bet is the morning of Wednesday the 9th of September for the biggest, cleanest groundswell. If that’s too much, the mornings of the 11th and 12th are also clean and solid.

Rusty.

Short Range Forecast

Moderate rain (total 10mm), heaviest on Wed night. Warm (max 31°C on Mon morning, min 24°C on Wed night). Wind will be generally light.

Days 4-6 Weather Summary

Heavy rain (total 57mm), heaviest during Fri morning. Warm (max 29°C on Sat afternoon, min 21°C on Fri night). Wind will be generally light.

Monday
31
Tuesday
1
Wednesday
2
Thursday
3
Friday
4
Saturday
5
Sunday
6
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
2
1
1
2
0
1
1
0
1
2
0
0
1
1
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)
0.7
SSW
9
0.6
S
8
0.4
SE
10
0.4
ESE
13
0.7
S
8
1.3
SSE
8
1.1
SSE
8
1.1
SSE
8
1.2
SSE
8
1
SSE
8
0.9
S
9
1.6
S
10
1.6
SSE
9
1.6
SSE
8
1
S
8
0.9
ESE
8
1.1
ESE
9
1.6
ESE
9
2
ESE
10
2.5
ESE
11
2.5
ESE
11
Wave Graph
Metric surfscale
Energy kJ
77
51
31
59
57
201
180
176
176
133
136
492
394
336
114
119
193
397
717
1628
1489
Wind (km/h)
5
SSW
15
SSW
5
WSW
5
SE
10
SE
5
SSE
5
ESE
5
E
5
NNE
10
NNE
10
ENE
15
NE
20
SSW
15
NNE
15
N
20
NNE
20
NE
10
NNE
15
ENE
15
E
15
ENE
Wind State
cross
cross
glassy
on
cross-on
glassy
on
on
glassy
cross
cross-on
cross-on
cross
cross
cross-off
cross
cross
cross
cross-on
on
cross-on
High Tide
7:55PM1.93m
8:29AM1.89m
8:20PM1.90m
9:13AM1.77m
8:48PM1.85m
10:06AM1.62m
9:18PM1.78m
11:21AM1.49m
9:56PM1.69m
1:30PM1.45m
10:59PM1.59m
3:29PM1.53m
1:00AM1.54m
Low Tide
1:53PM0.59m
2:11AM0.45m
2:23PM0.74m
2:49AM0.46m
2:53PM0.90m
3:32AM0.50m
3:25PM1.07m
4:25AM0.57m
4:05PM1.22m
5:39AM0.64m
5:24PM1.36m
7:18AM0.66m
8:15PM1.36m
clear
clear
clear
clear
clear
thunderstorm
part cloud
thunderstorm
mod rain
light rain
thunderstorm
heavy rain
thunderstorm
light rain
part cloud
clear
clear
part cloud
cloud
part cloud
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:35
5:35
5:35
5:37
5:37
5:37
5:39
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:30
6:29
6:28
6:25
6:24
6:23
6:22
 mm
2
2
6
2
2
21
28
4
Temp °C
31
31
26
30
30
26
30
29
26
27
27
24
27
26
23
28
29
24
27
27
24
Feels °C
34
34
31
33
33
31
33
33
30
31
31
27
29
28
24
26
28
25
27
27
23
  • 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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