Surf Forecasts:
Ikumi Beach surf forecast from 3 Sep 2026:
- Best quality surf: Sunday 6 Sep, 12PM (local time) - 10ft (3.0m), 9s period, E swell with cross-onshore winds.
- Most powerful swell: Sunday 6 Sep, 9PM (local time) - 13ft (4.0m), 11s period, E swell with 3,594 kJ wave energy.
- Next surfable swell (1★+): Saturday 5 Sep, 3AM (local time) - 2.5ft (0.8m), 9s period with SSW 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 Saturday (Sep 05) at 3AM. The primary swell is predicted to be 0.8m and 9s period with a secondary swell of 0.8m and 8s. Another secondary swell of 0.8m 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 4.0m 11s and forecast to arrive on Sunday (Sep 06) at 9PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 3s period and expected on Wednesday (Sep 09) at 6AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3AM (Sat 5th Sep) | 2.5ft (0.8m) 9s |
| Best Surf | 12PM (Sun 6th Sep) | 10ft (3.0m) 9s |
| Most Powerful | 9PM (Sun 6th Sep) | 13ft (4.0m) 11s |
Table - best surf conditions forecast for Ikumi Beach over the next 16 days.
The Lowdown
G'day, Rusty here. Look, I’ve been staring at the charts for Ikumi Beach, and it’s a bit of a mixed bag. There’s a big window of not-great conditions coming up, but we do have a couple of sessions that are worth paddling out for. The water is sitting at a balmy 85°, which is a full 4° warmer than usual for this time of year – it feels like a bath out there, which is a real bonus.
The first few days are a write-off. From Thursday the 3rd right through to the end of the first week, it’s mostly cross-shore winds, rain, and a lot of poor surf conditions. The swell is there, but the quality is just not happening. The combined energy for the period is mostly in the moderate range, but the wind is just messing it up. There's a big spike in energy on Sunday the 6th afternoon, with a huge reading, but the swell is predicted to be 12 ft and too big for this spot.
The real standout is Wednesday the 9th. Wednesday afternoon sees a 5 ft swell from the SE, with a 9-second period and glassy conditions. The combined energy is solid, and it’s looking like very good surf. The wind is light and variable, so it’s going to be clean. That’s your best bet for a proper session in the first week.
Then there’s a bit of a quiet spell, with a few stormy days and onshore winds, until we get to Tuesday the 15th. Tuesday morning is another standout. It’s completely calm and glassy, with a 6 ft swell from the ESE and a big combined energy. That is a decent pulse of energy, and with zero wind, it’s going to be clean and powerful. This is the one to circle on the calendar. That afternoon, the wind swings a little, but it’s still surfable.
After that, the swell drops off into the second week, with smaller waves and a few glassy mornings. Friday the 18th morning has a small 4 ft swell from the S with glassy conditions, but it’s not going to be a powerhouse. It’s surfable, just nothing to write home about. The second week is definitely a case of pick your moment for a small, clean wave.
So, to sum it up: the first week is a struggle until Wednesday the 9th afternoon, and the absolute best on offer is Tuesday the 15th morning. That’s the one.
Rusty.
Short Range ForecastHeavy rain (total 83mm), heaviest during Fri afternoon. Warm (max 29°C on Thu afternoon, min 21°C on Fri night). Wind will be generally light. | Days 5-7 Weather SummaryHeavy rain (total 25mm), heaviest during Tue night. Warm (max 29°C on Mon afternoon, min 23°C on Sun night). Wind will be generally light. | |||||||||||||||||||
Thu 3 | Friday 4 | Saturday 5 | Sunday 6 | Monday 7 | Tuesday 8 | Wednesday 9 | ||||||||||||||
PM | 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) | SSE 10 | S 10 | S 10 | S 10 | S 9 | ESE 9 | ESE 8 | ESE 7 | ESE 9 | E 10 | ESE 11 | ESE 9 | ESE 8 | ESE 9 | SE 10 | SE 10 | SE 10 | SE 9 | SE 9 | SSE 10 |
Wave Graph  | ||||||||||||||||||||
 kJ | 294 | 384 | 408 | 362 | 198 | 79 | 83 | 168 | 371 | 2393 | 1510 | 443 | 239 | 186 | 400 | 296 | 432 | 325 | 419 | 1088 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | cross | cross | cross | cross | cross | cross-on | cross | cross-on | cross-on | cross | cross-off | cross | cross-off | cross | cross | cross | cross-off | glassy | cross-off |
High Tide | 9:18PM1.78m | 11:21AM1.49m | 9:56PM1.69m | 1:30PM1.45m | 10:59PM1.59m | 3:29PM1.53m | 1:00AM1.54m | 4:18PM1.64m | 2:46AM1.61m | 4:50PM1.74m | 3:53AM1.73m | 5:17PM1.81m | ||||||||
Low Tide | 3:25PM1.07m | 4:25AM0.57m | 4:05PM1.22m | 5:39AM0.64m | 5:24PM1.36m | 7:18AM0.66m | 8:15PM1.36m | 8:48AM0.59m | 9:40PM1.24m | 9:50AM0.50m | 10:25PM1.08m | 10:37AM0.43m | 11:00PM0.91m | |||||||
 |  |  | |  |  | | |  |  |  | | |  | |  |  | | | | |
 | — | — | 5:37 | — | — | 5:37 | — | — | 5:39 | — | — | 5:39 | — | — | 5:39 | — | — | 5:41 | — | — |
 | 6:25 | — | — | 6:24 | — | — | 6:23 | — | — | 6:22 | — | — | 6:21 | — | — | 6:20 | — | — | 6:17 | — |
mm | 2 | — | 18 | 50 | 10 | — | — | 1 | 2 | — | 6 | 1 | — | — | — | 6 | 12 | — | — | — |
Temp °C | 29 | 25 | 25 | 22 | 22 | 27 | 29 | 25 | 24 | 26 | 25 | 27 | 29 | 25 | 28 | 26 | 25 | 27 | 30 | 25 |
Feels °C | 33 | 29 | 27 | 22 | 23 | 27 | 29 | 26 | 25 | 26 | 26 | 28 | 30 | 28 | 29 | 29 | 28 | 30 | 34 | 27 |
Swell 1 Height (m) Direction Period (s) | SSE 10 | S 10 | S 10 | S 10 | S 9 | ESE 9 | ESE 8 | ESE 7 | ESE 9 | ESE 10 | ESE 11 | ESE 9 | ESE 8 | ESE 9 | SE 10 | SE 10 | SE 10 | SE 9 | SE 9 | SSE 10 |
| kJ | 294 | 384 | 408 | 362 | 198 | 79 | 83 | 168 | 371 | 838 | 1510 | 443 | 239 | 186 | 400 | 296 | 432 | 325 | 419 | 1088 |
Swell 2 Height (m) Direction Period (s) | ESE 10 | ESE 10 | SE 9 | SE 9 | ESE 7 | SSE 8 | S 8 | S 7 | SSW 9 | SSW 9 | SSW 9 | SSW 9 | SSW 8 | S 10 | S 10 | SE 12 | S 9 | S 10 | S 10 | E 16 |
| kJ | 33 | 18 | 31 | 21 | 48 | 63 | 41 | 26 | 43 | 16 | 16 | 15 | 14 | 31 | 71 | 187 | 61 | 49 | 151 | 5 |
Swell 3 Height (m) Direction Period (s) | SE 10 | SE 10 | E 9 | E 9 | SE 9 | SSW 9 | SSW 9 | SW 9 | — | ESE 12 | — | SW 10 | S 10 | SW 9 | E 9 | S 9 | E 19 | S 11 | E 18 | — |
| kJ | 15 | 15 | 16 | 7 | 12 | 46 | 44 | 20 | — | 29 | — | 4 | 8 | 22 | 95 | 64 | 7 | 22 | 6 | — |
Wind waves Height (m) Direction Period (s) | — | NE 4 | NE 4 | NNE 5 | NNE 4 | NNE 4 | NNE 4 | — | NE 4 | E 10 | — | NNE 4 | NNE 4 | NNE 5 | NNE 5 | NE 4 | NE 3 | NNE 4 | NNE 4 | NNE 5 |
| kJ | — | 5 | 13 | 65 | 22 | 28 | 24 | — | 6 | 2393 | — | 13 | 28 | 15 | 19 | 15 | 3 | 19 | 19 | 77 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 30 | 8 | 30 | 30 | 8 | 30 | 30 | 30 | 36 | 30 | 8 | 30 | 30 | 0 | 30 | 8 | 8 | 8 | 0 | 30 |
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.
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