
Surf Forecasts:
Ikumi Beach surf forecast from 6 Sep 2026:
- Best quality surf: Monday 14 Sep, 12AM (local time) - 4.5ft (1.4m), 8s period, ESE swell with glassy winds.
- Most powerful swell: Wednesday 9 Sep, 3AM (local time) - 8ft (2.5m), 10s period, SSE swell with 1,365 kJ wave energy.
- Next surfable swell (1★+): Wednesday 9 Sep, 3PM (local time) - 5ft (1.6m), 8s 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 Wednesday (Sep 09) at 3PM. The primary swell is predicted to be 1.6m and 8s period with a secondary swell of 0.1m and 18s. Another secondary swell of 0.7m and 4s 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 2.5m 10s and forecast to arrive on Wednesday (Sep 09) at 3AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 5s period and expected on Wednesday (Sep 09) at 9AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3PM (Wed 9th Sep) | 5ft (1.6m) 8s |
| Best Surf | 12AM (Mon 14th Sep) | 4.5ft (1.4m) 8s |
| Most Powerful | 3AM (Wed 9th Sep) | 8ft (2.5m) 10s |
Table - best surf conditions forecast for Ikumi Beach over the next 16 days.
The Lowdown
G'day, Rusty here. Look, I've had a good look at the charts for Ikumi Beach, and I gotta be straight with you—this is a pretty lean run we've got ahead. The first week and a half is mostly a write-off with weak, short-period swell and onshore or cross-onshore winds messing things up. There are a couple of moments where things clean up, but the waves just aren't there. After that, it's a long stretch of tiny surf until a potential glimmer right at the end. Let's break it down.
Monday the 7th kicks off with a 5ft SE swell, but it's got a period of 9 seconds and a cross-shore breeze, making it messy. The combined energy is moderate at 560, but the report calls it marginal, and the afternoon gets worse with 6ft and a cross-onshore wind. Tuesday the 8th sees the swell drop to 4ft from the S, but it's still cross-shore with light rain, and the energy is moderate at 433. Not worth paddling out.
Wednesday the 9th morning has a bit more size at 7ft from the SSE with moderate energy (761), but the wind is onshore and there's rain. That changes in the afternoon—glassy conditions with a light offshore breeze from the NNW, and the swell drops to a cleaner 5ft from the SSE. The energy drops to 358, but the glassy surface means it'll be smooth. This is the best of a pretty ordinary bunch. For a beginner spot like Ikumi Beach, 5ft is a decent size, but it's inconsistent here, so expect long waits. The offshore wind is a major positive, so you might score a couple of fun ones if you're patient. The water temp is about average for this time of year.
Thursday the 10th goes downhill fast with a 4ft SSE swell and a moderate cross-shore breeze that'll chop it up. Friday the 11th morning goes glassy with a tiny 3ft SSE swell, period of 7 seconds, and weak energy at 134. It's surfable but very ordinary. Saturday the 12th morning is similar with 2ft glassy waves, but the energy is still weak at 121. From Saturday afternoon all the way through to Sunday the 20th, it's a long stretch of tiny, weak surf—mostly under 3ft with short periods and poor conditions. A few sessions are glassy, but there's just no power in the water. The combined energy drops to double digits, which is very weak.
Then, right at the end of the forecast period, on Tuesday the 22nd, we've got something interesting. A 2ft SE groundswell with a very long period of 19 seconds and glassy conditions. The combined energy is moderate at 362. Now, a 19-second period means serious energy and long lines, but at a beach break like Ikumi, it might break too straight. Still, if you time the tide right, you could get some clean, long walls. This is the standout of the whole outlook, but it's over a week away and very small, so keep your expectations in check.
All in all, Wednesday afternoon the 9th is your best bet for a session, with Tuesday morning the 22nd being a promising but less certain long-range option. The rest is a waiting game. It's been a quiet patch, but forecasts can change. Rusty out.
Short Range ForecastHeavy rain (total 51mm), heaviest during Wed morning. Warm (max 29°C on Mon morning, min 24°C on Sun night). Wind will be generally light. | Days 5-7 Weather SummaryLight rain (total 9mm), mostly falling on Thu afternoon. Warm (max 29°C on Sat morning, min 23°C on Wed night). Wind will be generally light. | ||||||||||||||||||
Monday 7 | Tuesday 8 | Wednesday 9 | Thursday 10 | Friday 11 | Saturday 12 | ||||||||||||||
Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Swell Height Map | |||||||||||||||||||
Wave Height (m) Direction Period (s) | SE 9 | SE 9 | SE 9 | SE 8 | S 9 | S 9 | S 10 | SSE 9 | SSE 8 | SSE 8 | SSE 8 | SE 8 | SE 7 | SSE 7 | SSE 7 | SSE 7 | SSE 8 | S 7 | E 14 |
Wave Graph | |||||||||||||||||||
549 | 357 | 540 | 264 | 249 | 340 | 861 | 749 | 339 | 184 | 175 | 133 | 126 | 104 | 74 | 73 | 65 | 40 | 35 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross-on | cross | cross | cross-on | cross | on | glassy | cross-off | cross | cross | cross | glassy | cross-off | glassy | glassy | on | glassy |
High Tide | 1:00AM1.54m | 4:18PM1.64m | 2:46AM1.61m | 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 | |||||||
Low Tide | 8:48AM0.59m | 9:40PM1.24m | 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 | |||||||
— | 5:39 | — | — | 5:39 | — | — | 5:41 | — | — | 5:41 | — | — | 5:41 | — | — | 5:43 | — | — | |
6:22 | — | 6:21 | — | — | 6:20 | — | — | 6:17 | — | — | 6:16 | — | — | 6:15 | — | — | 6:14 | — | |
mm | — | — | 1 | 2 | 4 | 1 | 16 | 19 | 8 | — | 1 | 2 | 2 | 1 | 1 | — | — | 2 | 1 |
Temp °C | 25 | 29 | 27 | 25 | 27 | 28 | 26 | 27 | 25 | 24 | 25 | 23 | 24 | 27 | 28 | 25 | 29 | 28 | 26 |
Feels °C | 26 | 31 | 29 | 28 | 31 | 32 | 30 | 32 | 29 | 27 | 25 | 25 | 29 | 32 | 32 | 29 | 33 | 33 | 32 |
Swell 1 Height (m) Direction Period (s) | SE 9 | SE 9 | SE 9 | SE 8 | S 9 | S 9 | S 10 | SSE 9 | SSE 8 | SSE 8 | SSE 8 | SE 8 | SE 7 | SSE 7 | SSE 7 | SSE 7 | SSE 8 | S 7 | S 7 |
549 | 357 | 540 | 264 | 249 | 340 | 861 | 749 | 339 | 184 | 175 | 133 | 126 | 104 | 74 | 73 | 65 | 40 | 26 | |
Swell 2 Height (m) Direction Period (s) | E 9 | SSE 10 | S 11 | S 10 | SE 8 | SE 8 | SE 8 | E 18 | E 18 | E 16 | E 16 | E 15 | E 15 | E 15 | SE 10 | SE 10 | SE 10 | SE 10 | ESE 9 |
252 | 163 | 22 | 190 | 145 | 167 | 151 | 6 | 6 | 5 | 5 | 4 | 17 | 17 | 23 | 24 | 25 | 24 | 34 | |
Swell 3 Height (m) Direction Period (s) | SSW 9 | SW 10 | SSW 11 | SSE 9 | SE 10 | ESE 10 | E 19 | E 18 | — | E 16 | — | E 18 | ESE 11 | ESE 11 | E 14 | E 14 | E 13 | E 13 | E 14 |
15 | 4 | 11 | 15 | 27 | 40 | 7 | 6 | — | 5 | — | 6 | 12 | 12 | 15 | 36 | 31 | 32 | 35 | |
Wind waves Height (m) Direction Period (s) | NNE 5 | NNE 5 | NE 4 | NE 4 | NNE 4 | NNE 4 | NNE 4 | NNW 5 | NE 4 | NNE 5 | NNE 4 | NNE 4 | NNE 3 | NNE 2 | — | — | — | — | ESE 3 |
40 | 40 | 17 | 15 | 12 | 13 | 38 | 35 | 13 | 67 | 26 | 5 | 1 | 1 | — | — | — | — | 1 | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 30 | 30 | 30 | 8 | 8 | 8 | 8 | 55 | 0 | 0 | 30 | 8 | 8 | 0 | 0 | 0 | 0 | 33 | 0 |
Best forecast wave conditions in Shikoku | |||||||||||||||||||
Best forecast wave conditions in Japan | |||||||||||||||||||
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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.










