Ikumi Beach Surf Break

Lat Long: 33.53° N 134.28° E

Ikumi Beach Surf Forecast and Surf Report

Issued: 2 am 02 Sep 2026 (local time)

Forecast update in  hr  min

Today's Ikumi Beach sea temperature is
29.1°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 1 Sep 2026:

  • Best quality surf: Sunday 6 Sep, 6AM (local time) - 10ft (3.0m), 8s period, ESE swell with cross-shore winds.
  • Most powerful swell: Tuesday 8 Sep, 9AM (local time) - 15ft (4.5m), 11s period, ESE swell with 5,183 kJ wave energy.
  • Next surfable swell (1★+): Wednesday 2 Sep, 6PM (local time) - 3.5ft (1.1m), 9s period with SSE 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 Wednesday (Sep 02) at 6PM. The primary swell is predicted to be 1.1m and 9s period with a secondary swell of 0.5m and 11s. 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 4.5m 11s and forecast to arrive on Tuesday (Sep 08) at 9AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 5s period and expected on Tuesday (Sep 08) at 12PM.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+) 6PM (Wed 2nd Sep)3.5ft (1.1m) 9s
Best Surf 6AM (Sun 6th Sep)10ft (3.0m) 8s
Most Powerful 9AM (Tue 8th Sep)15ft (4.5m) 11s

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


The Lowdown

Alright, Rusty here. Let's have a look at the only spot on the cards for this stretch: Ikumi Beach.

Right off the bat, the water's sitting at a warm 84.4°, which is a touch warmer than normal for this time of year – nice, but it's a sign of things being a little off.

The first few days are a bit of a write-off, honestly. Wednesday morning the 2nd sees a tiny 3.6ft SSE swell, but with a cross-onshore wind making it messy. The combined energy is weak (267). Thursday afternoon the 3rd shows a bit of promise with a clean 3.9ft SSE swell from a light cross-offshore breeze, but we're still in the ‘marginal’ zone. Nothing to get excited about.

Friday the 4th and Saturday the 5th are poor to average. The swell bumps up to 5.2ft to 5.6ft, but it's coming from the S and ESE with short, weak periods (7-9 seconds). The wind is chopping it up, and the energy is moderate at best (501-564). This is more of a kite-surfing setup than a paddling one.

Sunday the 6th and Monday the 7th is where things get interesting, but only for the brave. We're looking at a big 9.8ft to 11.5ft ESE swell, with strong energy (1779-1329). The wind is cross-offshore on Monday morning, which would be clean, but this swell is too big for this break. It's an expert-only zone, and honestly, it looks like a washing machine.

Tuesday the 8th is crazy. A massive 14.8ft ESE groundswell with a 11-second period hits, pumping out a whopping 9655 in combined energy. The wind is moderate cross-shore, so it's choppy and dangerous. Again, too big for this spot.

Now, for the first real standout. Wednesday the 9th morning. The swell drops to a much more manageable 6.9ft from the SE with a 10-second period. The wind swings light cross-offshore from the NNW, turning it clean. The energy is still strong (965), but the conditions are excellent. This is the best session of the first week. Get on it.

Thursday the 10th and Friday the 11th hold clean, fun waves. The swell drops to 5.2ft to 3.6ft from the SE. With a light cross-offshore breeze and clean conditions, it's good for a beginner to intermediate session. The energy is moderate (467-258).

Saturday the 12th and Sunday the 13th see a drop-off. The swell fades to 2.6ft to 4.3ft, and the wind turns cross-onshore, making it choppy again. We're back to the poor category.

From Monday the 14th to Tuesday the 15th, it's flat and poor. The wind is onshore, and the swell is tiny or, on the 15th, absolutely enormous again. A 13.1ft ESE groundswell with a 15-second period and 6311 energy is just too much for this beach.

But then we get to the real fire. The 16th and 17th of September. Wednesday morning the 16th, the swell is 7.2ft from the ESE with a 12-second period – that's a proper groundswell. The wind is glassy, and the conditions are excellent for experienced surfers. The energy is very strong (2461). Thursday the 17th is almost identical: 7.2ft from the SE at 12 seconds, glassy all day, and excellent conditions. This is the standout of the whole period. The swell direction (ESE/SE) is right on the optimum for this spot. It's going to be a long-period swell, so it'll break a bit straight at the beach, but the glassy conditions and solid size will make it an epic session for those who know what they're doing. Crowds are likely, as it's often busy.

There's a long gap of poor surf from the 12th to the 14th, and then again on the 15th with the massive swell, but the 16th and 17th make up for it.

Short Range Forecast

Heavy rain (total 187mm), heaviest during Thu night. Warm (max 30°C on Wed morning, min 22°C on Thu afternoon). Wind will be generally light.

Days 4-6 Weather Summary

Heavy rain (total 323mm), heaviest during Mon morning. Warm (max 24°C on Sat morning, min 22°C on Sun morning). Wind will be generally light.

Wednesday
2
Thursday
3
Friday
4
Saturday
5
Sunday
6
Monday
7
Tuesday
8
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
1
2
1
2
2
0
2
0
0
1
0
!
!
!
!
1
!
!
!
!
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.1
SSE
9
1.1
SSE
9
1.1
SSE
8
1
SSE
8
1.2
SSE
10
1.5
S
10
1.6
S
9
1.6
SSE
9
2.1
SE
8
1.7
ESE
7
1.3
ESE
7
1.7
ESE
8
3.5
ESE
9
3.5
ESE
9
3
ESE
9
3
ESE
8
2.5
ESE
8
3.5
SE
10
4.5
SE
11
3.5
SE
11
3
SE
11
Wave Graph
Metric surfscale
Energy kJ
189
206
164
147
300
459
440
432
543
297
193
372
1739
2073
1175
1268
887
2821
5183
2738
1882
Wind (km/h)
5
ENE
10
SE
5
E
10
NNE
10
N
10
NNE
15
NE
10
NE
20
ESE
15
NE
15
NE
15
NE
20
NE
25
NE
25
NNE
20
N
20
NNE
10
NNW
25
NNE
20
NNE
15
NNW
Wind State
cross-on
on
glassy
cross
cross-off
cross
cross-on
cross
on
cross-on
cross
cross-on
cross-on
cross
cross
cross-off
cross
cross-off
cross
cross
cross-off
High Tide
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
4:18PM1.64m
2:46AM1.61m
4:50PM1.74m
Low Tide
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
8:48AM0.59m
9:40PM1.24m
9:50AM0.50m
10:25PM1.08m
part cloud
part cloud
mod rain
mod rain
heavy rain
heavy rain
heavy rain
heavy rain
rain showers
rain showers
light rain
heavy rain
heavy rain
heavy rain
heavy rain
heavy rain
mod rain
part cloud
clear
part cloud
heavy rain
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:35
5:37
5:37
5:37
5:39
5:39
5:39
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:28
6:25
6:24
6:23
6:22
6:21
6:20
 mm
9
8
28
60
59
17
6
1
2
13
39
43
94
123
8
11
Temp °C
30
30
27
25
23
23
23
23
23
24
23
23
23
23
23
23
24
24
29
28
25
Feels °C
33
34
33
29
26
27
25
26
25
26
24
24
24
23
23
24
25
26
28
29
27
  • 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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