Surf Forecasts:
Ikumi Beach surf forecast from 23 Aug 2026:
- Best quality surf: Tuesday 25 Aug, 3AM (local time) - 10ft (3.0m), 15s period, SSE swell with glassy winds.
- Most powerful swell: Tuesday 25 Aug, 9AM (local time) - 10ft (3.0m), 15s period, SSE swell with 4,279 kJ wave energy.
- Next surfable swell (1★+): Monday 24 Aug, 3AM (local time) - 2.5ft (0.8m), 13s 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 24) at 3AM. The primary swell is predicted to be 0.8m and 13s period. 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 15s and forecast to arrive on Tuesday (Aug 25) at 9AM. Winds are predicted to be glassy at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.1m 9s period and expected on Friday (Aug 28) at 3AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3AM (Mon 24th Aug) | 2.5ft (0.8m) 13s |
| Best Surf | 3AM (Tue 25th Aug) | 10ft (3.0m) 15s |
| Most Powerful | 9AM (Tue 25th Aug) | 10ft (3.0m) 15s |
Table - best surf conditions forecast for Ikumi Beach over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s get into it.
Well, it’s a bit of a slow-burner for the next couple of weeks. The first real chance to get wet doesn’t show up until Monday morning. That’s a long wait, but when it comes, it’s got some serious potential.
We kick off on Monday, August 24th, with a bit of a tease. Tuesday, August 25th, is where the real juice is. Ikumi Beach is looking like the standout. Tuesday morning we’ve got a solid 10ft swell rolling in from the SSE, with a long period of 15 seconds. Combined wave energy is pumping at a strong 4307. The wind is glassy, dead calm from the SE, which means the surface will be clean. This is a big, powerful groundswell, and the water temp is about average for the time of year. Now, that's a lot of water moving. At 10ft, this is expert territory only. The Tuesday afternoon is still huge at 10ft, but the wind goes cross-onshore, so the morning is the session to aim for.
Wednesday the 26th settles down a bit, but it’s still a solid 8ft swell from the S in the morning. The wind is cross-onshore, so it won't be as clean as Tuesday. Thursday the 27th offers a brief window in the afternoon with a 5ft swell from the SSE and a clean, cross-offshore wind, but the energy is fading fast.
Then we hit a real dry patch. From Friday the 28th all the way through to Friday, September 4th, the surf is pretty much junk. Small, weak, and messy. There’s a long gap of about a week where the best you’ll get is a knee-high dribble or blown-out chop. The wind is mostly a problem, with strong onshore and cross-shore conditions making a mess of things. For a few days there, it’s more of a kite-surfing setup than a paddle-surfing one.
The second week shows a flicker of hope. On Saturday, September 5th, we get a glassy morning on a 2ft swell with a very long 18-second period. It’s small, but that long period means it could be a fun little longboard wave if you’re patient. The energy is low (301), so it’s not a standout.
The real return to form looks like Monday, September 7th. The afternoon session at Ikumi sees a 7ft swell from the S, with a 12-second period, and glassy conditions. The combined energy is high at 1182, and the forecast says excellent surf for experienced surfers. That’s over a week away, so treat it as a promising long-range call, but it’s the best bet on the horizon for a proper, clean, decent-sized wave.
Keep your eyes on the charts, but for now, the Tuesday morning session is the one to circle.
Rusty.
Short Range ForecastMostly dry. Warm (max 31°C on Wed morning, min 25°C on Sun night). Wind will be generally light. | Days 5-7 Weather SummaryLight rain (total 5mm), mostly falling on Wed night. Warm (max 31°C on Sat morning, min 26°C on Wed night). Wind will be generally light. | ||||||||||||||||||
Monday 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | Friday 28 | Saturday 29 | ||||||||||||||
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 12 | SE 19 | SE 16 | SSE 16 | SSE 15 | SSE 14 | S 13 | S 13 | S 12 | SSW 11 | SSE 9 | SSE 9 | SSE 8 | SSW 9 | SSW 9 | S 9 | S 8 | SSW 8 | S 8 |
Wave Graph | |||||||||||||||||||
152 | 1254 | 2357 | 1884 | 4279 | 3898 | 3049 | 1883 | 909 | 431 | 344 | 322 | 202 | 140 | 169 | 225 | 140 | 202 | 111 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | glassy | cross-on | glassy | glassy | cross-on | glassy | cross-on | cross | glassy | cross | cross-off | cross-off | cross | cross | cross-off | cross-off | cross-off | cross-off |
High Tide | 2:01AM1.59m | 4:51PM1.70m | 3:24AM1.68m | 5:22PM1.79m | 4:22AM1.80m | 5:50PM1.85m | 5:10AM1.91m | 6:16PM1.90m | 5:52AM1.99m | 6:40PM1.94m | 6:31AM2.03m | 7:05PM1.95m | |||||||
Low Tide | 9:07PM1.34m | 9:32AM0.51m | 10:12PM1.22m | 10:25AM0.41m | 10:53PM1.08m | 11:08AM0.34m | 11:28PM0.93m | 11:46AM0.31m | 00:00AM0.79m | 12:20PM0.32m | 00:32AM0.66m | 12:52PM0.37m | 1:04AM0.56m | ||||||
— | 5:30 | — | — | 5:31 | — | — | 5:31 | — | — | 5:31 | — | — | 5:33 | — | — | 5:33 | — | — | |
6:39 | — | 6:38 | — | — | 6:37 | — | — | 6:37 | — | — | 6:36 | — | — | 6:34 | — | — | 6:32 | — | |
mm | — | — | — | — | — | — | — | — | — | 2 | 1 | — | — | 1 | 1 | — | — | — | 1 |
Temp °C | 27 | 30 | 30 | 26 | 30 | 30 | 26 | 31 | 31 | 27 | 29 | 28 | 27 | 30 | 30 | 26 | 31 | 31 | 26 |
Feels °C | 32 | 33 | 34 | 31 | 33 | 33 | 31 | 35 | 34 | 32 | 34 | 32 | 31 | 34 | 33 | 30 | 33 | 33 | 30 |
Swell 1 Height (m) Direction Period (s) | SE 12 | SE 19 | SE 16 | SE 14 | SSE 15 | SSE 14 | S 13 | S 13 | S 12 | SSW 11 | SSE 9 | SSE 9 | SSE 8 | SSW 9 | SSW 9 | S 9 | S 8 | ESE 9 | S 8 |
152 | 1254 | 2357 | 1704 | 4279 | 3898 | 3049 | 1883 | 909 | 431 | 344 | 322 | 202 | 140 | 169 | 225 | 140 | 16 | 111 | |
Swell 2 Height (m) Direction Period (s) | SSW 9 | S 8 | SSW 8 | SSE 16 | E 15 | E 14 | E 13 | SE 10 | SE 9 | SSE 9 | SSW 11 | SSW 11 | SSW 8 | SSE 8 | SE 10 | ESE 9 | SE 10 | SE 13 | SE 11 |
30 | 21 | 21 | 1884 | 17 | 16 | 32 | 173 | 242 | 211 | 291 | 143 | 72 | 102 | 15 | 8 | 14 | 7 | 19 | |
Swell 3 Height (m) Direction Period (s) | S 8 | SW 9 | SW 9 | E 11 | E 12 | E 11 | — | E 13 | E 13 | E 12 | E 12 | E 11 | SW 9 | SE 10 | E 10 | SSE 9 | SE 13 | SE 9 | ESE 9 |
21 | 13 | 37 | 10 | 11 | 10 | — | 30 | 29 | 25 | 11 | 10 | 41 | 15 | 8 | 9 | 27 | 3 | 8 | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | SSE 7 | — | — | SSW 8 | — |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | 89 | — | — | 202 | — | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 0 | 0 | 4 | 0 | 4 | 4 | 4 | 4 | 4 | 0 | 4 | 0 | 0 | 4 | 4 | 0 | 0 | 16 | 0 |
Best forecast wave conditions in Shikoku | |||||||||||||||||||
Best forecast wave conditions in Japan | |||||||||||||||||||
Header Global | |||||||||||||||||||
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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.











