Ikumi Beach Surf Break

Lat Long: 33.53° N 134.28° E

Ikumi Beach Surf Forecast and Surf Report

Issued: 2 pm 10 Aug 2026 (local time)

Forecast update in  hr  min

Today's Ikumi Beach sea temperature is
28.6° C
0.8° 

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 10 Aug 2026:

  • Best quality surf: Monday 10 Aug, 9PM (local time) - 3.5ft (1.0m), 10s period, S swell with cross-offshore winds.
  • Most powerful swell: Tuesday 11 Aug, 3AM (local time) - 3.5ft (1.0m), 11s period, S swell with 238 kJ wave energy.
  • Next surfable swell (1★+): Monday 10 Aug, 9PM (local time) - 3.5ft (1.0m), 10s 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 10) at 9PM. The primary swell is predicted to be 1.0m and 10s period with a secondary swell of 0.6m and 12s. Another secondary swell of 0.4m and 4s is also forecast. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Ikumi Beach in the next 16 days are 1.0m 11s and forecast to arrive on Tuesday (Aug 11) at 3AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 4s period and expected on Tuesday (Aug 11) at 9PM.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+) 9PM (Mon 10th Aug)3.5ft (1.0m) 10s
Best Surf 9PM (Mon 10th Aug)3.5ft (1.0m) 10s
Most Powerful 3AM (Tue 11th Aug)3.5ft (1.0m) 11s

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


The Lowdown

Alright, this is Rusty. Let's be straight with you: the outlook for Ikumi Beach over the next 16 days is pretty flat. We're looking at a long stretch of small, weak surf with only a few decent windows. Most of the time the swell is just too small to get excited about, and the conditions are often compromised by onshore or cross-shore breezes. The water's sitting at a warm 84°, which is about normal for this time of year, so at least you won't need a thick wetsuit.

The first real chance of anything rideable doesn't show up until Monday, August 12th, in the morning. The swell is a tiny 2ft from the SSW with a 10-second period, but the wind is completely glassy – dead calm. That's a major positive, making it clean as a whistle. The combined energy is only 197 (weak), so it's for the longboard or a big foamie, and you'll have to hunt for the little peaks. Expect crowds, as this spot is often busy, and it's inconsistent, so patience is key.

The pattern repeats itself over the next few days. Early mornings on Friday, August 16th, and Saturday, August 17th offer the same deal: 2ft of SSW swell with glassy conditions. The energy is still low (113 and 160 respectively), but the clean surface means you can still have a fun little session on the mal. The afternoons are generally a write-off with onshore or cross-shore winds.

Looking further out, we get a slight pulse around Tuesday, August 20th. The swell picks up to 3ft from the SSE, but the period drops to 8 seconds – that's short-period, windswell, and it won't have much shape. The morning is glassy, which is positive, but it's still a very ordinary wave. The energy is a bit higher at 123, but still weak.

The end of the month offers a bit more hope. Tuesday, August 27th, and Wednesday, August 28th see the swell bump back up to 3ft from the SE, with a 10-second period. The early mornings are glassy again, and the energy reads 170 and 192 – still weak overall, but the best numbers we've seen. It's still not big, but it's the best period on offer. The crowds are still a factor, and the waves are inconsistent, but if you're desperate for a wave, these are the standouts.

Honestly, for the whole 16 days, your best bet is to go at dawn, on a longboard, and manage your expectations. The glassy windows are the only saving grace. There's nothing here for a shortboarder, and the entire period is a bit of a grind. The good news is that the swell is small, so it's not intimidating for beginners, but the inconsistent nature makes it a tough call.

Rusty.

Short Range Forecast

Moderate rain (total 16mm), heaviest on Thu morning. Warm (max 30°C on Mon afternoon, min 22°C on Tue night). Wind will be generally light.

Days 5-7 Weather Summary

Moderate rain (total 10mm), heaviest on Thu afternoon. Warm (max 29°C on Sat morning, min 23°C on Thu night). Wind will be generally light.

Mon
10
Tuesday
11
Wednesday
12
Thursday
13
Friday
14
Saturday
15
Sunday
16
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
1
2
1
1
2
1
0
1
0
0
1
1
0
1
1
1
2
0
0
2
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1
S
10
1
S
10
1
S
10
0.9
SSW
10
0.9
SSW
10
0.7
SSW
10
0.7
S
10
0.7
S
9
0.7
SSW
9
0.7
SSW
9
0.7
S
9
0.7
S
9
0.6
S
9
0.7
S
8
0.8
S
10
0.8
SSW
10
0.8
S
9
0.7
S
10
0.7
S
9
0.9
ESE
11
Wave Graph
Metric surfscale
Energy kJ
190
216
216
173
173
92
88
83
88
86
79
78
56
71
125
128
108
90
81
202
Wind (km/h)
5
ESE
10
N
10
NE
10
ENE
5
NW
0
E
10
SE
5
ESE
10
E
5
ESE
5
NE
5
E
10
SSE
5
WNW
5
E
10
SSE
5
WNW
5
ESE
10
S
5
WNW
Wind State
on
cross-off
cross
cross-on
cross-off
glassy
on
glassy
cross-on
on
glassy
glassy
cross-on
off
glassy
cross-on
glassy
on
cross
off
High Tide
5:20PM1.74m
3:55AM1.74m
5:52PM1.82m
4:48AM1.84m
6:20PM1.88m
5:34AM1.93m
6:47PM1.92m
6:16AM1.99m
7:13PM1.94m
6:56AM2.01m
7:39PM1.94m
7:35AM1.99m
8:04PM1.93m
Low Tide
10:39PM1.19m
10:55AM0.31m
11:20PM1.07m
11:36AM0.25m
11:55PM0.95m
12:13PM0.24m
00:28AM0.83m
12:48PM0.27m
1:01AM0.72m
1:20PM0.34m
1:34AM0.63m
1:52PM0.45m
2:09AM0.57m
thunderstorm
clear
clear
part cloud
part cloud
part cloud
rain showers
rain showers
thunderstorm
thunderstorm
thunderstorm
clear
thunderstorm
clear
clear
clear
clear
rain showers
thunderstorm
rain showers
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:20
5:22
5:22
5:22
5:24
5:24
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:54
6:53
6:52
6:52
6:51
6:50
6:49
 mm
1
1
7
7
4
3
2
1
2
1
Temp °C
30
26
30
30
24
27
26
25
25
26
25
28
28
25
29
29
25
28
28
25
Feels °C
34
30
31
31
27
29
28
29
28
30
29
31
31
29
31
32
29
32
31
29
  • 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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