Ikumi Beach Surf Break

Lat Long: 33.53° N 134.28° E

Ikumi Beach Surf Forecast and Surf Report

Issued: 2 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: Tuesday 25 Aug, 6PM (local time) - 5.5ft (1.7m), 13s period, SE swell with glassy winds.
  • Most powerful swell: Tuesday 25 Aug, 6PM (local time) - 5.5ft (1.7m), 13s period, SE swell with 1,006 kJ wave energy.
  • Next surfable swell (1★+): Wednesday 19 Aug, 12AM (local time) - 2.5ft (0.7m), 8s period with SE 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 12AM. 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 13s and forecast to arrive on Tuesday (Aug 25) at 6PM. Winds are predicted to be glassy at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.7m 9s period and expected on Tuesday (Aug 25) at 12AM.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+)12AM (Wed 19th Aug)2.5ft (0.7m) 8s
Best Surf 6PM (Tue 25th Aug)5.5ft (1.7m) 13s
Most Powerful 6PM (Tue 25th Aug)5.5ft (1.7m) 13s

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


The Lowdown

Alright, mates, it’s gonna be a quiet start here. For the first few days, there’s barely a ripple worth paddling for, so don’t bother getting the wax out just yet. It’s not until Friday morning the 21st of August that we finally see a pulse of energy, with the combined swell energy hitting a moderate 208 and some glassy conditions. That Friday morning is your first real chance to get wet, with a 3ft swell coming from the south, and the wind is dead glassy. It’s only fair, but at least it’s clean.

The real story, though, kicks off the following week. From Tuesday the 25th of August, the ocean just wakes up. We’ve got a solid 3ft SSE swell on the Tuesday morning with a very long 16-second period, and combined energy sitting at a strong 537. That south-east groundswell is the real deal, but the cross-onshore wind makes it a bit messy—still worth a look if you’re keen.

Then comes the standout window. Thursday morning the 27th of August is where it’s at. You’ve got 8ft of SSE swell with a very long 15-second period, glassy conditions, and the combined energy is massive at 3103. The water temp is a warm 83°F, which is pretty standard for this time of year, so it’s a beautiful session for experienced surfers. It’s a bit too big for beginners, but if you’ve got the chops, this is the morning to be out there.

That big energy keeps rolling into Friday the 28th, with 12ft of S swell and a 16-second period—again glassy in the morning. The combined energy is huge at 5647. But honestly, by Thursday afternoon and into Friday, the swell is pushing 10ft to 12ft, and that’s expert-only territory. It’s gonna be a proper electric, heavy day at Ikumi Beach. The break itself is inconsistent and the crowds can be an issue, especially when it’s this good—so get there early or find a quiet peak.

Sunday the 30th of August is another excellent morning, with 7ft of SSW groundswell, again a long 14-second period, glassy, and combined energy at 2261. It’s a bit smaller than the peak, but the quality is still high, and it’s more manageable for a strong intermediate.

All in all, the 27th and 28th of August are the standout days. Big, clean groundswell, glassy mornings and a proper long period that will wrap nicely into the break. Just remember, Ikumi Beach can get crowded when it’s good, so plan ahead.

Rusty.

Short Range Forecast

Light rain (total 9mm), mostly falling on Tue afternoon. Warm (max 30°C on Fri 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.

Tue
18
Wednesday
19
Thursday
20
Friday
21
Saturday
22
Sunday
23
Monday
24
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
0
1
0
0
1
1
0
1
2
1
2
1
0
1
1
0
1
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)
0.9
SE
5
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
0.8
S
9
1
S
10
1
S
9
0.9
SSW
9
0.9
SSW
9
0.9
SSW
9
0.8
SSW
9
0.8
SSW
9
0.8
SSW
9
0.7
SSW
9
0.8
SSW
9
0.4
SE
9
Wave Graph
Metric surfscale
Energy kJ
36
69
56
51
29
25
25
99
101
190
173
141
149
116
90
88
86
70
94
21
Wind (km/h)
10
SSE
5
SSE
5
ESE
10
SSE
5
W
5
SE
10
S
5
W
5
SE
10
S
5
W
5
SE
10
S
5
W
5
SE
10
S
5
W
5
E
10
ESE
0
NE
Wind State
cross-on
glassy
on
cross-on
glassy
glassy
cross-on
cross-off
glassy
cross
cross-off
glassy
cross-on
cross-off
glassy
cross-on
glassy
glassy
on
glassy
High Tide
8:58PM1.86m
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
thunderstorm
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
<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
2
3
1
3
Temp °C
27
26
28
28
26
29
29
26
30
29
26
30
30
26
29
29
25
29
29
26
Feels °C
31
31
32
33
32
32
33
31
33
32
30
33
33
30
32
31
29
33
33
31
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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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