
Surf Forecasts:
Ikumi Beach surf forecast from 10 Jul 2026:
- Best quality surf: Friday 10 Jul, 3PM (local time) - 11ft (3.5m), 16s period, S swell with cross-onshore winds.
- Most powerful swell: Saturday 11 Jul, 6AM (local time) - 13ft (4.0m), 17s period, S swell with 8,927 kJ wave energy.
- Next surfable swell (1★+): Friday 10 Jul, 3PM (local time) - 11ft (3.5m), 16s period with S 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 Friday (Jul 10) at 3PM. The primary swell is predicted to be 3.5m and 16s period. The wind is predicted to be cross-onshore 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 6AM. Winds are predicted to be glassy at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.6m 4s period and expected on Monday (Jul 13) at 3PM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3PM (Fri 10th Jul) | 11ft (3.5m) 16s |
| Best Surf | 3PM (Fri 10th Jul) | 11ft (3.5m) 16s |
| Most Powerful | 6AM (Sat 11th Jul) | 13ft (4.0m) 17s |
Table - best surf conditions forecast for Ikumi Beach over the next 16 days.
Alright folks, Rusty here. Let’s get straight into what’s happening with the surf over the next couple of weeks.
First up, we’ve got a big pulse of swell hitting Ikumi Beach, but there’s a catch. The wave energy is massive – we’re talking combined energy readings up in the thousands (8486) – but the swell is pushing 10ft to 13ft. That’s way too big for this spot. For a beginner-friendly, inconsistent break like Ikumi, a 12ft S swell with a 17-second period is just a washing machine. Don’t even think about paddling out on Friday, Saturday, or Sunday morning unless you’ve got a death wish and a tow-in crew. The wind is glassy on Friday morning and Sunday morning, which would be magic in smaller surf, but these sizes are strictly for the experts.
The standout window opens up Sunday afternoon, July 12. The swell drops to 8ft from the SSW, period settles to 14 seconds, and the wind turns cross-offshore from the SW. The combined energy is still strong (2724), but it’s manageable. This is the one time in the whole run where the conditions are described as “excellent surf conditions for experienced surfers.” The water is sitting at 77°F, which is a bit colder than normal for this time of year – about 3°F off the average, so you’ll feel that slight chill.
By Monday, July 13, the swell drops to a much more user-friendly 5ft, with a 12-second period from the SSW, and glassy conditions in the morning. The wave energy is moderate (692). This is the best call for the average surfer. It’s clean, it’s rideable, and while Ikumi is inconsistent, when it’s on like this, it’s worth the wait. The afternoon holds similar 5ft surf, but there’s a risk of thunderstorms, so keep an eye on the sky.
After Monday, the surf tapers off hard. Tuesday morning is 3ft and glassy, but the energy is low (251). From Wednesday, July 15, right through to the end of the third week of July, the swell drops below 3ft, the energy falls into double digits (36 to 199), and the wind turns mostly onshore or cross-on. We’re looking at a solid week and a half of flat, poor conditions. There’s a tiny blip on Monday, July 20, with 3ft from the SSW and glassy wind, but the energy is weak (184) and it’s surfable but ordinary. Don’t get your hopes up.
The best of the second week is on Thursday, July 23, with a 2ft SE swell, 12-second period, and glassy morning wind. The energy is moderate (316) and it’s labeled as “good conditions.” Friday and Saturday mornings also show glassy 3ft and 3ft surf, but the energy is low (319 to 434) and the consistency of Ikumi is always a gamble. Still, it’s the best of a weak period.
Overall, the standout is Sunday afternoon, July 12, for experienced surfers, and Monday, July 13, for a solid, clean session for anyone who can handle a 5ft set. After that, it’s a long flat spell with a few glassy mornings but nothing to write home about. The crowds at Ikumi can be an issue when it’s good, so expect company on the standout days.
Rusty.
Short Range ForecastLight rain (total 8mm), mostly falling on Sun night. Warm (max 31°C on Sun afternoon, min 24°C on Fri night). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 7mm), mostly falling on Mon afternoon. Warm (max 29°C on Mon morning, min 24°C on Wed night). Wind will be generally light. | ||||||||||||||||||||
Friday 10 | Saturday 11 | Sunday 12 | Monday 13 | Tuesday 14 | Wednesday 15 | Thursday 16 | |||||||||||||||
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 | S 16 | S 17 | S 17 | SSW 17 | SSW 17 | SSW 16 | SSW 14 | SSW 12 | SSW 12 | SSW 11 | SSW 11 | S 10 | SSW 10 | SSW 9 | SSW 9 | SSW 9 | SSW 8 | ESE 9 | ESE 9 | ESE 10 |
Wave Graph | |||||||||||||||||||||
6964 | 7220 | 7851 | 8486 | 8345 | 8344 | 4833 | 2724 | 1069 | 658 | 521 | 350 | 204 | 160 | 88 | 64 | 62 | 39 | 28 | 28 | 80 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | cross-on | glassy | cross-on | cross-on | cross-off | glassy | cross-off | glassy | glassy | glassy | glassy | glassy | on | glassy | on | on | glassy | on | on | glassy |
High Tide | 3:37PM1.53m | 2:04AM1.65m | 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 | ||||||||
Low Tide | 8:35PM1.20m | 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 | ||||||||
5:00 | — | — | 5:00 | — | — | 5:01 | — | — | 5:01 | — | — | 5:01 | — | — | 5:03 | — | — | 5:03 | — | — | |
— | 7:15 | — | — | 7:15 | — | — | 7:15 | — | — | 7:14 | — | — | 7:14 | — | — | 7:13 | — | — | 7:13 | — | |
mm | — | — | — | — | — | — | — | — | 8 | 1 | 4 | — | — | 2 | — | — | — | — | — | — | — |
Temp °C | 28 | 27 | 25 | 28 | 28 | 25 | 29 | 31 | 25 | 29 | 29 | 26 | 29 | 28 | 26 | 28 | 28 | 25 | 28 | 28 | 25 |
Feels °C | 31 | 30 | 30 | 32 | 31 | 29 | 32 | 34 | 30 | 35 | 34 | 31 | 33 | 33 | 31 | 32 | 31 | 30 | 31 | 31 | 29 |
Swell 1 Height (m) Direction Period (s) | S 17 | S 16 | S 17 | S 17 | SSW 17 | SSW 17 | SSW 16 | SSW 14 | SSW 12 | SSW 12 | SSW 11 | SSW 11 | S 10 | SSW 10 | SSW 9 | SSW 9 | SSW 9 | SSW 8 | SE 6 | SSW 8 | ESE 10 |
6964 | 7220 | 7851 | 8486 | 8345 | 8344 | 4833 | 2724 | 1069 | 658 | 521 | 350 | 204 | 160 | 88 | 64 | 62 | 39 | 21 | 22 | 80 | |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | SE 12 | — | — | SE 11 | SE 10 | SE 10 | SE 10 | SE 10 | SE 12 | ESE 11 | ESE 10 | SE 4 | SE 5 | SSW 8 | ESE 9 | SE 9 |
— | — | — | — | — | 23 | — | — | 29 | 28 | 17 | 14 | 24 | 36 | 47 | 43 | 10 | 10 | 26 | 28 | 31 | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | SE 9 | E 9 | E 9 | SE 12 | SE 12 | E 7 | ESE 4 | SE 4 | ESE 10 | ESE 9 | ESE 9 | SE 11 | SSW 8 |
— | — | — | — | — | — | — | — | 12 | 6 | 6 | 6 | 23 | 4 | 3 | 3 | 18 | 28 | 28 | 18 | 21 | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | WSW 4 | — | — | ESE 4 | — | SE 5 | — | — | — | SE 6 | — |
— | — | — | — | — | — | — | — | — | — | 8 | — | — | 7 | — | 12 | — | — | — | 21 | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 4 | 4 | 4 | 4 | 16 | 10 | 10 | 0 | 0 | 0 | 0 | 0 | 0 | 33 | 0 | 30 | 371 | 0 | 30 | 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.










