Ikumi Beach Surf Break

Lat Long: 33.53° N 134.28° E

Ikumi Beach Surf Forecast and Surf Report

Issued: 2 pm 16 Aug 2026 (local time)

Forecast update in  hr  min

Today's Ikumi Beach sea temperature is
28.3° C
0.7° 

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 16 Aug 2026:

  • Best quality surf: Friday 21 Aug, 3AM (local time) - 4.5ft (1.4m), 11s period, S swell with glassy winds.
  • Most powerful swell: Friday 21 Aug, 6AM (local time) - 5ft (1.5m), 11s period, S swell with 553 kJ wave energy.
  • Next surfable swell (1★+): Monday 17 Aug, 3AM (local time) - 3.5ft (1.1m), 6s 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 Monday (Aug 17) at 3AM. The primary swell is predicted to be 1.1m and 6s period with a secondary swell of 0.5m and 8s. Another secondary swell of 0.4m and 10s is also forecast. 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 1.5m 11s and forecast to arrive on Friday (Aug 21) at 6AM. Winds are predicted to be glassy at the time the swell arrives.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+) 3AM (Mon 17th Aug)3.5ft (1.1m) 6s
Best Surf 3AM (Fri 21st Aug)4.5ft (1.4m) 11s
Most Powerful 6AM (Fri 21st Aug)5ft (1.5m) 11s

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


The Lowdown

Alright, listen up. It's Rusty here, and I gotta be straight with you about what we're looking at for the next couple of weeks. It's a proper mixed bag, with a whole lot of nothing to start, then a tease of something good, followed by a wall of pure, raw power that's only for the hardcore.

The first real chance of a surfable wave doesn't even show up until Friday, August 21st. Up until then, it's a total bust. The swell is tiny, the wind is mostly cross or onshore, and it's all earning a big fat zero from me. We're talking about four or five days of flat, choppy nothing. Forget it.

Right, so here's where it gets interesting. Friday, August 21st is our first real standout for a surfer looking for a clean wave. Ikumi Beach finally gets a pulse of life. The swell comes up to 5 feet, out of the South with a decent 11-second period, and here's the kicker... the wind goes glassy in the morning. Absolutely clean. It's going to be smooth, workable, and fun on a longboard or a fish. It won't be pumping, but after the drought, it'll feel like heaven. Just be aware, the crowds do show up here often, so get out early.

Now, Saturday, August 22nd stays pretty good with glassy conditions again and chest-high 4-foot swell from the SSW. It's solid fun for the weekend warrior.

But hold on. The real event, the one you mark on your calendar, is Wednesday, August 26th. This is a proper heavy hitter. Ikumi Beach is looking at a serious 7-foot swell from the ESE, with a very long 15-second period. That's proper groundswell energy, and the combined energy reading is massive at 2066. The wind is set to be glassy in the afternoon, which is just the cherry on top. This is signalling excellent conditions for experienced surfers, but let me warn you: with that size and that long period, it might be breaking a bit fat and straight on the beach, so the better, more lined-up waves will be for the guys who know where to sit. This is the best on offer, no doubt.

After that, the swell just keeps building, but so does the wind. Thursday, August 27th sees an 8-foot to 10-foot swell, but the wind swings cross-onshore and the break gets hit with a 3619 combined energy reading. It's big and it's messy. Then from Friday, August 28th right through to Monday, September 1st, we are talking about proper, genuine, hold-onto-your-board-size surf. We're looking at 12-foot to 18-foot swell. The combined energy readings are insane, up to 13889. The wind is onshore or cross-onshore with a strong breeze. The swell is simply too big for this break, and the conditions are going to be choppy and dangerous. This is not a paddle-in setup anymore, lads. This is for the tow-in crew or the kite surfers who don't care about getting smashed. The rest of us should stay on the sand and watch.

So to wrap it up: don't even bother this week. Get excited for Friday, August 21st morning for a clean, cruisy session. Then, lock in Wednesday, August 26th afternoon for the best, most powerful and clean swell of the window, if you've got the skill. After that, it's all monstrous and blown out.

Rusty out.

Short Range Forecast

Heavy rain (total 22mm), heaviest during Sun afternoon. Warm (max 29°C on Mon afternoon, min 24°C on Tue night). Wind will be generally light.

Days 5-7 Weather Summary

Light rain (total 8mm), mostly falling on Thu afternoon. Warm (max 29°C on Thu morning, min 25°C on Wed night). Wind will be generally light.

Sun
16
Monday
17
Tuesday
18
Wednesday
19
Thursday
20
Friday
21
Saturday
22
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
0
0
1
0
0
1
0
0
2
3
1
2
2
2
0
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.6
ESE
6
1.2
SE
6
0.9
SE
5
0.4
SE
11
0.4
SE
11
0.6
ESE
8
0.4
SE
10
0.4
SE
10
0.4
SE
10
0.4
SE
10
0.4
SE
10
0.7
S
9
0.8
S
9
1
S
10
1.5
S
11
1.4
SSW
11
1.2
SSW
10
1.1
SSW
10
1.1
SSW
10
1
SSW
9
Wave Graph
Metric surfscale
Energy kJ
190
98
45
30
30
45
28
35
26
25
25
83
95
181
533
452
294
245
245
185
Wind (km/h)
10
SE
10
ESE
5
ESE
10
SE
5
SE
10
ESE
5
SE
0
E
5
ESE
10
SSE
5
NW
5
ESE
10
SSE
5
W
5
E
10
SSE
5
W
5
N
5
SSE
15
SSE
Wind State
on
on
on
cross-on
glassy
on
cross-on
glassy
on
cross-on
glassy
on
cross-on
glassy
glassy
cross-on
glassy
glassy
glassy
cross-on
High Tide
8:04PM1.93m
8:16AM1.92m
8:30PM1.90m
8:59AM1.82m
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
Low Tide
2:09AM0.57m
2:23PM0.59m
2:46AM0.55m
2:54PM0.76m
3:27AM0.55m
3:26PM0.93m
4:16AM0.59m
4:02PM1.10m
5:20AM0.63m
4:54PM1.26m
6:46AM0.65m
6:52PM1.37m
thunderstorm
rain showers
part cloud
clear
rain showers
thunderstorm
thunderstorm
part cloud
part cloud
part cloud
part cloud
part cloud
thunderstorm
thunderstorm
part cloud
part cloud
cloud
light rain
mod rain
heavy rain
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:24
5:26
5:26
5:26
5:28
5:28
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:49
6:46
6:45
6:45
6:44
6:43
6:42
 mm
10
7
2
2
1
6
1
1
6
61
Temp °C
26
25
27
29
26
27
27
26
29
28
26
29
28
26
29
29
26
26
25
26
Feels °C
29
28
31
32
31
31
31
31
33
32
32
33
33
32
33
33
31
31
30
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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