Ikumi Beach Surf Break

Lat Long: 33.53° N 134.28° E

Ikumi Beach Surf Forecast and Surf Report

Issued: 2 am 23 Aug 2026 (local time)

Forecast update in  hr  min

Today's Ikumi Beach sea temperature is
28.3°C
0.6° 

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 22 Aug 2026:

  • Best quality surf: Monday 24 Aug, 9PM (local time) - 10ft (3.0m), 16s period, SE swell with glassy winds.
  • Most powerful swell: Tuesday 25 Aug, 12PM (local time) - 11ft (3.5m), 16s period, SSE swell with 6,132 kJ wave energy.
  • Next surfable swell (1★+): Sunday 23 Aug, 9AM (local time) - 2ft (0.6m), 8s period with SSW 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 Sunday (Aug 23) at 9AM. The primary swell is predicted to be 0.6m and 8s period with a secondary swell of 0.4m 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 3.5m 16s and forecast to arrive on Tuesday (Aug 25) at 12PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 8s period and expected on Monday (Aug 24) at 3AM.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+) 9AM (Sun 23rd Aug)2ft (0.6m) 8s
Best Surf 9PM (Mon 24th Aug)10ft (3.0m) 16s
Most Powerful12PM (Tue 25th Aug)11ft (3.5m) 16s

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


The Lowdown

Alright, folks, Rusty here. Let's get stuck into this one. It's a bit of a mixed bag for Ikumi Beach, so let's break it down day by day.

We're looking at a pretty quiet start. Honestly, Sunday morning (23rd August) is a bit of a non-event. There's a tiny 2ft swell from the SSW, but it's weak and short period. The water temperature is sitting at 83°, which is about where you'd expect it for this time of year. Nothing to write home about. The afternoon is even worse, so that's a write-off.

Now, Monday morning (24th August) is where things get interesting and it's the real standout of the whole forecast. The swell jumps up to a clean 4ft from the SE with a nice long period of 18 seconds – that's proper groundswell. The wind is glassy, a dead calm SE breeze. The combined energy is massive at (1197), a solid moderate pulse. This is excellent surf for experienced surfers. The water is still warm and the conditions will be pristine. Get out there early. The afternoon sees the wind shift and the swell jumps up a bit, but the cross-onshore ruins the magic.

Tuesday (25th August) is a day for experts only. We've got a solid 12ft swell from the SSE with a 15-second period, and the energy is pumping at (5909). That's powerful. The problem is, it's just too big for this break. The morning has clean offshore winds, but the size is intimidating. If you're a charger, you might be in for a battle, but for most of us, it's a day to watch from the sand. Wednesday (26th August) brings another 10ft swell from the S, again too big and will be a mess in the afternoon with a cross-onshore wind.

Thursday (27th August) is a good call. The swell drops to a more manageable 6ft from the S in the morning, and it's dead calm – glassy. That's a good window for a solid session. The combined energy is still respectable at (847). The afternoon stays clean with a 5ft swell from the SSE, but the period drops a bit.

Friday (28th August) morning is a nice little session. A 4ft S swell with glassy winds. It's small but clean. The energy is low (304), so it's a fun board day, not a beast. The weekend (29th-30th August) fades out. The swell drops, winds turn onshore, and the energy barely registers. Sunday (30th August) has a risk of thunderstorms and a tiny 3ft swell. It's a dud. The same goes for Monday (31st August) and Tuesday (1st September), with onshore winds and messy, marginal conditions. The swell tries to build again, but the wind is trash.

The second week is pretty grim. From 2nd September onwards, we have a persistent cross-onshore wind and building swell, but it's all blown out. The combined energy fluctuates, but the quality is poor. By 5th September, we're looking at a strong breeze of 28 mph from the SE and a messy, short-period 5ft swell. This is more of a kite-surfing setup than a surf one. The only glimmer is on Sunday morning (6th September), where the wind swings clean offshore from the WSW, with a 4ft SE swell. It's a small, clean window, but the period is short (8 seconds). It's a chance, but nothing to get excited about.

So, the clear winner is Monday morning (24th August). Get that session. The rest of the forecast is a lot of waiting for clean windows that are either too big, too small, or too windy.

Rusty.

Short Range Forecast

Mostly dry. Warm (max 31°C on Sun morning, min 25°C on Sun night). Wind will be generally light.

Days 4-6 Weather Summary

Moderate rain (total 14mm), heaviest on Thu morning. Warm (max 30°C on Wed morning, min 25°C on Fri night). Wind will be generally light.

Sunday
23
Monday
24
Tuesday
25
Wednesday
26
Thursday
27
Friday
28
Saturday
29
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
2
4
3
6
!
!
!
!
3
4
3
3
2
2
1
2
1
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)
0.6
SSW
8
0.4
SE
13
0.7
SE
12
1.3
SE
18
2.1
SE
16
2.5
SE
16
3.5
SSE
15
3.5
SSE
15
3
SSE
14
3
S
14
2.5
S
13
2
S
12
1.9
S
11
1.6
SSE
9
1.4
SSE
8
1.1
S
9
1.5
S
9
1.4
S
9
1.3
S
9
1.3
S
9
1.2
SSE
8
Wave Graph
Metric surfscale
Energy kJ
54
45
152
1176
2133
3369
5875
5403
3496
3970
2219
1155
813
397
268
185
372
311
263
281
190
Wind (km/h)
5
SE
10
S
5
W
5
SE
10
SSE
5
SW
5
ESE
10
SSE
5
NNW
5
SE
5
SSE
5
NNW
0
S
5
WNW
5
W
5
WSW
5
S
5
NNW
5
E
5
SSE
5
E
Wind State
glassy
cross
cross-off
glassy
cross-on
glassy
on
cross-on
glassy
glassy
cross-on
glassy
glassy
glassy
glassy
glassy
cross
glassy
cross-on
cross-on
glassy
High Tide
4:10PM1.59m
2:01AM1.59m
4:51PM1.70m
3:24AM1.68m
5:22PM1.79m
4:22AM1.80m
5:50PM1.85m
5:10AM1.91m
6:16PM1.90m
5:52AM1.99m
6:40PM1.94m
6:31AM2.03m
7:05PM1.95m
Low Tide
9:07PM1.34m
9:32AM0.51m
10:12PM1.22m
10:25AM0.41m
10:53PM1.08m
11:08AM0.34m
11:28PM0.93m
11:46AM0.31m
00:00AM0.79m
12:20PM0.32m
00:32AM0.66m
12:52PM0.37m
1:04AM0.56m
clear
clear
clear
clear
part cloud
clear
clear
clear
part cloud
part cloud
thunderstorm
rain showers
light rain
light rain
cloud
part cloud
thunderstorm
part cloud
thunderstorm
thunderstorm
thunderstorm
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:30
5:30
5:31
5:31
5:31
5:33
5:33
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:39
6:38
6:37
6:37
6:36
6:34
6:32
 mm
3
3
4
1
3
1
3
12
Temp °C
31
30
27
30
30
26
30
29
26
30
29
27
27
26
26
30
30
27
29
29
26
Feels °C
35
33
32
34
34
31
33
32
31
35
34
32
32
31
31
34
35
32
33
34
32
  • 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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