Ikumi Beach Surf Break

Lat Long: 33.53° N 134.28° E

Ikumi Beach Surf Forecast and Surf Report

Issued: 8 pm 18 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 18 Aug 2026:

  • Best quality surf: Wednesday 19 Aug, 6AM (local time) - 2.5ft (0.7m), 8s period, ESE swell with glassy winds.
  • Most powerful swell: Wednesday 26 Aug, 3AM (local time) - 5.5ft (1.7m), 14s period, SSE swell with 1,019 kJ wave energy.
  • Next surfable swell (1★+): Wednesday 19 Aug, 6AM (local time) - 2.5ft (0.7m), 8s period with ESE 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 (Aug 19) at 6AM. The primary swell is predicted to be 0.7m and 8s period with a secondary swell of 0.4m 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 1.7m 14s and forecast to arrive on Wednesday (Aug 26) at 3AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 3s period and expected on Sunday (Aug 23) at 3AM.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+) 6AM (Wed 19th Aug)2.5ft (0.7m) 8s
Best Surf 6AM (Wed 19th Aug)2.5ft (0.7m) 8s
Most Powerful 3AM (Wed 26th Aug)5.5ft (1.7m) 14s

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


The Lowdown

Alright, mate, Rusty here. Let’s have a good look at what’s on offer for Ikumi Beach.

To be honest, the next week and a bit is pretty flat and unremarkable. There's small, weak swell on the cards, and we’re really just waiting for things to kick off. From Wednesday the 19th through to about Thursday the 28th, it’s mostly small, weak surf with a combined energy that barely gets out of the double digits (93). The best of that early period is the Friday and Saturday mornings, the 21st and 22nd, where we see a little bump to 3ft from the south with glassy conditions – surfable, but nothing to write home about.

The real story, and the one true standout in this whole 16-day window, is the final day of August. Monday the 31st is the one to circle. The morning has a solid 7ft south-southwest swell with clean, offshore wind from the west-northwest, and conditions just get better into the afternoon. By the afternoon, you’ve got a 8ft south-southwest groundswell with a 14-second period and glassy conditions. The combined energy is pumping at 3777 (moderate-to-strong), meaning there’s real power in the water. This is for experienced surfers only, as 8ft is well into the expert zone, but the wave quality should be excellent at a beach break like this, especially with that long period and clean surface. The water temperature is about average for this time of year, so no surprises there. Crowds are often a factor at Ikumi, so expect company, but for those in the know, that Monday arvo is the session to chase.

After that, the first couple of days of September see the swell absolutely roar to life, but it gets too big – 10ft, then 15ft, then 16ft – with combined energy readings hitting four and five digits (7037, 9316, 13599). That’s massive, powerful and very strong energy, but it’s way over the head for this spot. It’s going to be a close-out mess or unsurfable at Ikumi Beach. Unless you’re towing in or after a death wish, that’s a hard pass.

So, to sum it up: keep your board handy for the tiny glassy mornings around the 21st and 22nd for a fun splash, but the absolute pick of the period is Monday the 31st of August, with that solid, clean south-southwest groundswell. Get on it if you’ve got the skills.

Rusty.

Short Range Forecast

Light rain (total 8mm), mostly falling on Tue night. Warm (max 29°C on Thu morning, min 24°C on Wed night). Wind will be generally light.

Days 5-7 Weather Summary

Mostly dry. Warm (max 30°C on Sat morning, min 25°C on Fri night). Wind will be generally light.

Wednesday
19
Thursday
20
Friday
21
Saturday
22
Sunday
23
Monday
24
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
1
1
0
1
1
0
1
1
0
1
1
0
1
1
0
1
0
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)
0.7
SE
8
0.7
ESE
8
0.7
ESE
8
0.4
SE
10
0.4
SE
10
0.4
SE
10
0.8
S
9
0.9
S
9
0.9
S
9
0.9
SSW
9
0.9
SSW
9
0.8
SSW
9
0.9
SSW
9
0.9
SSW
10
0.8
SSW
10
0.8
SSW
9
0.7
SSW
9
0.7
SSW
10
0.6
SSW
10
Wave Graph
Metric surfscale
Energy kJ
69
56
51
29
25
34
102
127
133
138
138
110
119
148
105
90
71
86
60
Wind (km/h)
0
S
5
ESE
10
SSE
5
W
0
SE
10
S
5
WSW
5
ESE
10
SSW
5
W
5
ESE
10
S
5
W
5
SSE
10
S
5
WSW
5
ESE
10
SSE
0
N
Wind State
glassy
glassy
cross-on
glassy
glassy
cross-on
glassy
glassy
cross
glassy
glassy
cross-on
glassy
glassy
cross-on
glassy
on
cross-on
glassy
High Tide
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
4:51PM1.70m
Low Tide
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
9:32AM0.51m
10:12PM1.22m
thunderstorm
thunderstorm
thunderstorm
clear
clear
part cloud
clear
part cloud
thunderstorm
clear
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:26
5:26
5:28
5:28
5:30
5:30
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:45
6:45
6:44
6:43
6:42
6:39
6:38
 mm
3
1
3
1
Temp °C
26
28
28
26
29
29
26
29
29
26
30
30
26
30
29
26
29
28
25
Feels °C
31
32
33
32
32
33
31
32
33
30
33
33
30
33
32
31
32
32
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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