Ikumi Beach Surf Break

Lat Long: 33.53° N 134.28° E

Ikumi Beach Surf Forecast and Surf Report

Issued: 2 am 08 Sep 2026 (local time)

Forecast update in  hr  min

Today's Ikumi Beach sea temperature is
28.7°C
1.4° 

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 7 Sep 2026:

  • Best quality surf: Wednesday 9 Sep, 3AM (local time) - 10ft (3.0m), 9s period, SSE swell with cross-onshore winds.
  • Most powerful swell: Wednesday 9 Sep, 6AM (local time) - 10ft (3.0m), 9s period, S swell with 1,406 kJ wave energy.
  • Next surfable swell (1★+): Tuesday 8 Sep, 6PM (local time) - 8ft (2.5m), 10s period with SSE 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 Tuesday (Sep 08) at 6PM. The primary swell is predicted to be 2.5m and 10s period with a secondary swell of 1.9m and 10s. Another secondary swell of 1.2m and 8s 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 3.0m 9s and forecast to arrive on Wednesday (Sep 09) at 6AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 4s period and expected on Wednesday (Sep 09) at 6PM.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+) 6PM (Tue 8th Sep)8ft (2.5m) 10s
Best Surf 3AM (Wed 9th Sep)10ft (3.0m) 9s
Most Powerful 6AM (Wed 9th Sep)10ft (3.0m) 9s

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


The Lowdown

Alright, grab your board, let’s talk about Ikumi Beach. The first half of the forecast is a proper snoozer, but if you hang tight, there’s a beast of a swell coming in the second week that’ll make it all worth it.

We start off on Tuesday, 8th September, and it’s a rough one. There’s a 5ft swell from the south, but with a cross-onshore breeze and the combined energy at 593, it’s gonna be a bumpy, frustrating paddle. The water’s a warm 84°, a touch above normal, but that doesn’t fix the mess. The best early look is Wednesday morning, 9th September, with a solid 10ft south-southeast swell and a combined energy of 1242. But look, that’s way too big for this spot. It’s a beginner-friendly break, and anything over 8ft is for experts only. The wind is cross-shore, so it’s gonna be a washing machine.

From Thursday, 10th September, the swell drops to 4ft or less, and the winds are mostly cross or onshore. There’s a glassy moment on Friday morning, 11th September, with a tiny 3ft south-southeast swell, but it’s just ordinary. This pattern of weak, small surf (combined energy under 150) sticks around for the rest of the week. A few days of near-nothing.

Then, on Monday, 14th September, things perk up. The afternoon brings a glassy 5ft east-southeast swell, with a combined energy of 587. Still small, but clean. That carries into Tuesday morning, 15th September, with another glassy 4ft swell.

But the real gold is the groundswell that shows up on Sunday, 20th September. The afternoon is glassy calm with a 6ft east-southeast swell and a combined energy of 556. That’s a fun session. The standout, though, is Monday, 21st September. The morning delivers a 6ft east-southeast swell, but the period is 16 seconds – that’s a very long period groundswell. The combined energy is a massive 2300. The wind is cross-offshore and clean. This is excellent for experienced surfers. The swell direction is spot on for this break. Just remember, with such a long period, the waves can be a bit walled-up on the beach, so hunt for the peaks. The afternoon pumps up to 8ft (combined energy 4288), but with a 12 mph north wind, it’s a bit more of a handful.

Tuesday, 22nd September, keeps the party going with a 8ft east-southeast swell at 15 seconds and a combined energy of 3433. The morning is clean again with a light cross-offshore breeze. Another top session for the advanced crew. After that, the swell fades out.

So, the best calls are Monday, 21st September and Tuesday, 22nd September. The first week is a bust, but that second week groundswell is a proper gem. This spot can get crowded, so be ready for company. The water’s warmer than usual, so a shorty might be enough.

Rusty.

Short Range Forecast

Heavy rain (total 50mm), heaviest during Tue morning. Warm (max 27°C on Tue afternoon, min 22°C on Wed night). Wind will be generally light.

Days 4-6 Weather Summary

Heavy rain (total 24mm), heaviest during Sat afternoon. Warm (max 28°C on Sun morning, min 24°C on Fri night). Wind will be generally light.

Tuesday
8
Wednesday
9
Thursday
10
Friday
11
Saturday
12
Sunday
13
Monday
14
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
2
4
!
2
2
2
1
2
1
0
1
0
1
1
0
0
0
2
3
2
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.5
S
9
1.8
S
9
2.5
S
10
3
SSE
9
2.4
SSE
9
1.3
SSE
8
1.3
SSE
8
1.3
SSE
9
1.2
SSE
8
1
SSE
8
1
SSE
8
0.9
SSE
7
0.9
SSE
7
0.7
SSE
7
0.6
S
7
0.3
E
13
0.3
E
13
0.7
ESE
9
1.3
ESE
9
1.5
ESE
9
1.3
ESE
9
Wave Graph
Metric surfscale
Energy kJ
375
551
1363
1236
803
237
212
228
184
123
120
76
75
47
36
33
34
71
268
351
292
Wind (km/h)
10
ENE
5
ESE
5
S
15
S
10
SSW
15
N
10
N
10
NE
5
NNE
5
ESE
5
S
5
NNE
5
NNE
5
E
0
NNW
5
E
10
E
10
E
5
E
5
NNE
5
N
Wind State
cross-on
on
glassy
cross
cross
cross-off
cross-off
cross-on
glassy
glassy
cross-on
glassy
cross
glassy
glassy
cross-on
on
on
glassy
glassy
cross-off
High Tide
4:50PM1.74m
3:53AM1.73m
5:17PM1.81m
4:44AM1.86m
5:43PM1.87m
5:27AM1.96m
6:07PM1.91m
6:07AM2.02m
6:32PM1.94m
6:45AM2.04m
6:56PM1.95m
7:23AM2.02m
7:21PM1.95m
Low Tide
9:50AM0.50m
10:25PM1.08m
10:37AM0.43m
11:00PM0.91m
11:16AM0.39m
11:31PM0.75m
11:51AM0.38m
00:02AM0.61m
12:23PM0.42m
00:34AM0.49m
12:54PM0.50m
1:06AM0.40m
1:24PM0.61m
1:39AM0.36m
thunderstorm
thunderstorm
rain showers
thunderstorm
thunderstorm
light rain
rain showers
part cloud
part cloud
rain showers
thunderstorm
rain showers
rain showers
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
mod rain
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:39
5:41
5:41
5:41
5:43
5:43
5:43
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:20
6:17
6:16
6:15
6:14
6:13
6:12
 mm
11
7
15
6
2
5
4
1
4
1
2
5
1
2
2
6
3
2
6
Temp °C
26
27
27
27
27
24
24
26
24
26
27
25
27
27
26
28
27
26
26
26
25
Feels °C
31
33
32
31
32
27
27
28
27
31
32
30
32
32
32
31
31
31
31
31
30
  • Map Icons:
  • Break
  • 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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