Surf Forecasts:
Ikumi Beach surf forecast from 11 Jul 2026:
- Best quality surf: Saturday 11 Jul, 3PM (local time) - 13ft (4.0m), 17s period, SSW swell with cross-shore winds.
- Most powerful swell: Saturday 11 Jul, 6PM (local time) - 13ft (4.0m), 17s period, SSW swell with 8,744 kJ wave energy.
- Next surfable swell (1★+): Saturday 11 Jul, 3PM (local time) - 13ft (4.0m), 17s 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 (Jul 11) at 3PM. The primary swell is predicted to be 4.0m and 17s period. The wind is predicted to be cross-shore as the swell arrives.
The most powerful waves expected at Ikumi Beach in the next 16 days are 4.0m 17s and forecast to arrive on Saturday (Jul 11) at 6PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.7m 3s period and expected on Monday (Jul 13) at 3AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3PM (Sat 11th Jul) | 13ft (4.0m) 17s |
| Best Surf | 3PM (Sat 11th Jul) | 13ft (4.0m) 17s |
| Most Powerful | 6PM (Sat 11th Jul) | 13ft (4.0m) 17s |
Table - best surf conditions forecast for Ikumi Beach over the next 16 days.
Alright, Rusty here, let’s break it down.
The first few days are a no-go for normal paddling. Saturday and Sunday, the 11th and 12th of July, a huge, long-period groundswell from the south-southwest hits with a 17-second period and combined energy readings of 8486 and 5296 – that’s very strong, dangerous energy. The swell is 13ft dropping to 12ft, so this is only for experts on big-wave gear. Ikumi Beach is a beach break, and with such a long period, the waves will be closing out in a straight line. The wind is glassy on Sunday morning, but the size makes it more of a kitesurfing scene than a paddle surf.
Water temp is 76°F, which is 3°F colder than normal – a bit nippy, so you’ll want a thicker wetsuit.
Monday morning the 13th of July is the first real window. Swell drops to 5ft from the SSW with a 12-second period, glassy wind, and a moderate energy of 681. This is the standout. The afternoon holds 5ft with glassy conditions too. Tuesday the 14th is still clean with 3ft to 3ft waves, but it’s shrinking. Crowds are “often”, so expect a few surfers out.
From Wednesday the 15th through the 21st, it’s a long, flat spell. Swell is under 3ft, mostly with poor or onshore wind, and energy readings are weak, mostly under 150. Not worth a paddle.
The second week shows a flicker of life. Thursday morning the 23rd of July brings 4ft from the ESE, 11-second period, glassy, with a combined energy of 294 – a clean, fun little session. Then the real long-range promise is Sunday morning the 26th of July: 5ft from the ESE, 11-second period, glassy, with a combined energy of 967. That’s a solid session, but it’s two weeks out, so keep an eye on the forecast.
The best bet is Monday morning the 13th of July with 5ft SSW groundswell and glassy conditions. The long-range standout is Sunday morning the 26th of July.
Rusty out.
Short Range ForecastLight rain (total 3mm), mostly falling on Sun afternoon. Warm (max 31°C on Sun morning, min 24°C on Sat night). Wind will be generally light. | Days 4-6 Weather SummarySome drizzle, heaviest during Tue afternoon. Warm (max 32°C on Tue morning, min 25°C on Thu night). Wind will be generally light. | ||||||||||||||||||||
Saturday 11 | Sunday 12 | Monday 13 | Tuesday 14 | Wednesday 15 | Thursday 16 | Friday 17 | |||||||||||||||
AM | 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) | S 17 | SSW 17 | SSW 16 | SSW 16 | SSW 14 | SSW 13 | SSW 12 | SSW 11 | SSW 11 | SSW 10 | SSW 10 | SSW 9 | SSW 9 | SSW 9 | SSW 8 | ESE 10 | SSW 8 | SSW 8 | SSW 8 | ESE 9 | ESE 9 |
Wave Graph  | |||||||||||||||||||||
 kJ | 8486 | 8545 | 7564 | 5296 | 2763 | 1236 | 658 | 512 | 343 | 209 | 169 | 121 | 84 | 62 | 55 | 35 | 38 | 33 | 32 | 31 | 94 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross | off | glassy | cross | off | glassy | glassy | cross-off | glassy | glassy | glassy | cross-on | on | cross | cross-on | cross-on | glassy | glassy | on | cross-on |
High Tide | 4:41PM1.63m | 3:04AM1.70m | 5:29PM1.72m | 3:59AM1.75m | 6:09PM1.80m | 4:49AM1.82m | 6:44PM1.85m | 5:35AM1.87m | 7:16PM1.87m | 6:19AM1.90m | 7:47PM1.88m | 7:02AM1.91m | 8:17PM1.87m | ||||||||
Low Tide | 9:27AM0.41m | 9:47PM1.21m | 10:19AM0.29m | 10:43PM1.17m | 11:06AM0.20m | 11:28PM1.12m | 11:48AM0.14m | 00:09AM1.05m | 12:28PM0.12m | 00:46AM0.98m | 1:05PM0.15m | 1:23AM0.90m | 1:41PM0.22m | 2:00AM0.83m | |||||||
 |  |  | |  |  | |  | | | | | | | | | |  | | |  | |
 | 5:00 | — | — | 5:01 | — | — | 5:01 | — | — | 5:01 | — | — | 5:03 | — | — | 5:03 | — | — | 5:03 | — | — |
 | — | 7:15 | — | — | 7:15 | — | — | 7:14 | — | — | 7:14 | — | — | 7:13 | — | — | 7:13 | — | — | 7:13 | — |
mm | — | — | — | — | 1 | 1 | — | 1 | — | — | 1 | — | — | — | — | — | — | — | — | — | 6 |
Temp °C | 28 | 28 | 24 | 31 | 30 | 26 | 31 | 30 | 28 | 32 | 31 | 29 | 31 | 30 | 27 | 29 | 27 | 26 | 29 | 30 | 26 |
Feels °C | 32 | 31 | 28 | 35 | 34 | 31 | 36 | 35 | 33 | 36 | 36 | 34 | 36 | 35 | 33 | 33 | 32 | 32 | 32 | 33 | 30 |
Swell 1 Height (m) Direction Period (s) | S 17 | SSW 17 | SSW 16 | SSW 16 | SSW 14 | SSW 13 | SSW 12 | SSW 11 | SSW 11 | SSW 10 | SSW 10 | SSW 9 | SSW 9 | SSW 9 | SSW 8 | S 8 | SSW 8 | ESE 9 | SSW 8 | SSW 7 | ESE 9 |
| kJ | 8486 | 8545 | 7564 | 5296 | 2763 | 1236 | 658 | 512 | 343 | 209 | 169 | 121 | 84 | 62 | 55 | 35 | 38 | 28 | 32 | 31 | 94 |
Swell 2 Height (m) Direction Period (s) | — | — | SE 12 | — | SE 14 | SE 10 | SE 10 | SE 10 | SE 10 | SE 12 | SE 12 | SE 11 | ESE 11 | SE 10 | SE 10 | ESE 10 | ESE 9 | SE 10 | ESE 9 | ESE 9 | SSW 8 |
| kJ | — | — | 23 | — | 8 | 39 | 17 | 17 | 15 | 36 | 36 | 31 | 44 | 27 | 17 | 31 | 29 | 15 | 26 | 26 | 23 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | E 9 | E 9 | SE 13 | SE 12 | E 9 | E 9 | SE 12 | E 8 | E 8 | ESE 9 | SE 10 | SE 10 | ESE 3 | SE 10 | SE 10 | ESE 3 |
| kJ | — | — | — | — | — | 15 | 6 | 7 | 6 | 6 | 2 | 21 | 12 | 5 | 16 | 16 | 15 | 1 | 15 | 15 | 1 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | NNE 3 | NE 3 | — | — | — | — | — | SSE 3 | SSW 8 | SE 3 | ESE 4 | — |
| kJ | — | — | — | — | — | — | — | — | — | 3 | 2 | — | — | — | — | — | 2 | 33 | 3 | 5 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 4 | 16 | 10 | 10 | 16 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 30 | 33 | 16 | 33 | 33 | 0 | 0 | 30 | 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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