
Surf Forecasts:
Ikumi Beach surf forecast from 8 Jul 2026:
- Best quality surf: Thursday 9 Jul, 3PM (local time) - 10ft (3.0m), 15s period, SSE swell with cross-onshore winds.
- Most powerful swell: Saturday 11 Jul, 12AM (local time) - 13ft (4.0m), 18s period, S swell with 10,689 kJ wave energy.
- Next surfable swell (1★+): Wednesday 8 Jul, 3PM (local time) - 7ft (2.2m), 16s 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 Wednesday (Jul 08) at 3PM. The primary swell is predicted to be 2.2m and 16s period with a secondary swell of 1.2m and 18s. 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 4.0m 18s and forecast to arrive on Saturday (Jul 11) at 12AM. Winds are predicted to be glassy at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 13s period and expected on Monday (Jul 13) at 12AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3PM (Wed 8th Jul) | 7ft (2.2m) 16s |
| Best Surf | 3PM (Thu 9th Jul) | 10ft (3.0m) 15s |
| Most Powerful | 12AM (Sat 11th Jul) | 13ft (4.0m) 18s |
Table - best surf conditions forecast for Ikumi Beach over the next 16 days.
G’day, I’m Rusty. Let’s have a proper look at what’s coming up for Ikumi Beach. This stretch is exposed and can fire when the angle is right, but it’s an inconsistent setup, so a good swell doesn’t always line up. Keep that in mind—this isn’t a break that pumps every week. Right now the water is sitting at 76°F, about 3°F cooler than average for this time of year, so you’ll notice the water’s a bit chillier than usual.
The first few days? Honestly, the surf’s there but it’s messy or too big for the break. Wednesday morning (8 July) has a solid SE swell of 7ft with a very long 15-second period, and the energy is strong (2685), but the wind is light onshore. Crowds are often around here, and Ikumi is not a forgiving spot when it gets heavy. That swell pushes up to 7ft on Wednesday afternoon and the wind goes glassy—that’s the kind of clean surface every surfer chases—but it’s pushing the limits for this break.
Thursday (9 July) keeps building: 8ft Thursday morning, then 10ft Thursday afternoon. The combined energy jumps to 3606, which is strong, but the swell is bigger than what this place usually handles well. Wind stays cross-onshore. Friday (10 July) sees the peak with an 12ft S swell in the morning and a 17-second period—very long and powerful, energy reading 7367—turning to 13ft in the afternoon. Glassy conditions in the morning, but for beginners, this is way too much. For experts, it could be a beast, but it’s heavy and the break isn’t set up for clean takeoffs when it’s that big.
Saturday (11 July) keeps the 13ft S swell rolling with strong energy (9002 in the morning), but the wind stays light and onshore-ish. Again, not ideal. Sunday (12 July) drops back to 8ft in the morning with glassy wind and a long 16-second period from the SSW—that’s probably the most manageable size for experienced surfers across this whole first week. The energy is still moderate (3494). The afternoon gets a bit sloppy.
Then from Monday (13 July) through about the middle of the following week, the swell drops away significantly. We’re looking at 4ft to 2ft most days, with short 10- to 12-second periods. Combined energy sits in the low hundreds (292-729). Winds are often glassy, so it’s clean but tiny—not worth paddling out for unless you’re on a longboard and just want a few ankle-biters. Wednesday morning (15 July) has a clean 4ft from the SE, 12-second period, and glassy wind, but it’s small.
The standout in the whole outlook? I’d point you to Wednesday 22 July morning. The swell picks back up to 5ft from the SSE with a long 15-second period, combined energy at 922 (moderate but building), and glassy wind—NE light air. That’s clean, shoulder-high waves with proper groundswell energy. The afternoon that same day jumps to 7ft from the SSE, 13-second period, energy hitting 1639, still glassy. That afternoon is for experienced surfers only—but if you’re solid, it’s the best wave of the whole run. After that, Thursday (23 July) gets a bit lumpy with stronger cross-onshore wind.
So, to sum it up: there’s a solid swell window from Wednesday 8 July through the weekend, but it’s mostly too big or poorly aligned for Ikumi. A few glassy pockets on Wednesday afternoon and Sunday morning are the best of that run. Then a flat spell through the middle of the month, before Wednesday 22 July delivers the real highlight—especially that afternoon session for the experienced crew. Keep an eye on that one, but remember, this is two weeks out, so don’t lock plans yet.
That’s the read.
- Rusty
Short Range ForecastSome drizzle, heaviest during Wed morning. Warm (max 27°C on Thu afternoon, min 23°C on Wed night). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 9mm), mostly falling on Mon afternoon. Warm (max 28°C on Sun morning, min 24°C on Sat night). Wind will be generally light. | ||||||||||||||||||||
Wednesday 8 | Thursday 9 | Friday 10 | Saturday 11 | Sunday 12 | Monday 13 | Tuesday 14 | |||||||||||||||
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) | SE 15 | SE 16 | SSE 15 | SSE 15 | SSE 15 | SSE 15 | S 17 | S 17 | S 18 | S 17 | SSW 17 | SSW 17 | SSW 16 | SSW 14 | S 12 | S 10 | SSW 11 | S 11 | SSW 10 | SE 12 | SE 14 |
Wave Graph | |||||||||||||||||||||
1882 | 2314 | 3156 | 3009 | 3560 | 3943 | 7367 | 9281 | 10689 | 9002 | 8240 | 6900 | 3486 | 1833 | 625 | 225 | 363 | 229 | 163 | 141 | 648 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | glassy | glassy | on | cross-on | glassy | glassy | cross-on | glassy | on | cross-on | glassy | glassy | cross-on | glassy | glassy | cross-on | glassy | glassy | cross-on | glassy |
High Tide | 12:29PM1.45m | 00:06AM1.64m | 2:09PM1.45m | 1:03AM1.64m | 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 | ||||||||
Low Tide | 5:55PM1.01m | 7:15AM0.63m | 7:11PM1.13m | 8:25AM0.53m | 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 | ||||||||
4:58 | — | — | 4:58 | — | — | 5:00 | — | — | 5:00 | — | — | 5:01 | — | — | 5:01 | — | — | 5:01 | — | — | |
— | 7:15 | — | — | 7:15 | — | — | 7:15 | — | — | 7:15 | — | — | 7:15 | — | — | 7:14 | — | — | 7:14 | — | |
mm | 1 | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 2 | — | 3 | 3 | 2 | 1 | — |
Temp °C | 24 | 24 | 24 | 26 | 27 | 24 | 27 | 26 | 25 | 26 | 25 | 24 | 28 | 27 | 25 | 28 | 27 | 25 | 27 | 27 | 24 |
Feels °C | 28 | 28 | 29 | 28 | 30 | 28 | 30 | 30 | 30 | 31 | 29 | 29 | 31 | 31 | 30 | 32 | 32 | 30 | 30 | 30 | 28 |
Swell 1 Height (m) Direction Period (s) | SE 15 | SE 16 | SSE 15 | SSE 15 | SSE 15 | SSE 15 | S 17 | S 17 | S 18 | S 17 | SSW 17 | SSW 17 | SSW 16 | SSW 14 | S 12 | S 10 | SSW 11 | S 11 | SSW 10 | SSW 10 | SE 14 |
1882 | 2314 | 3156 | 3009 | 3560 | 3943 | 7367 | 9281 | 10689 | 9002 | 8240 | 6900 | 3486 | 1833 | 625 | 225 | 363 | 229 | 163 | 128 | 648 | |
Swell 2 Height (m) Direction Period (s) | SSE 18 | SSE 18 | E 8 | S 19 | E 8 | S 18 | — | — | — | — | — | — | SE 15 | E 9 | SW 13 | SSW 12 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 |
803 | 917 | 36 | 475 | 46 | 1308 | — | — | — | — | — | — | 8 | 7 | 261 | 180 | 15 | 55 | 73 | 71 | 90 | |
Swell 3 Height (m) Direction Period (s) | — | — | — | E 8 | — | E 8 | — | — | — | — | — | — | — | — | SE 9 | SE 10 | SE 11 | SE 15 | SE 13 | SE 12 | SSW 9 |
— | — | — | 4 | — | 31 | — | — | — | — | — | — | — | — | 22 | 17 | 18 | 9 | 56 | 141 | 90 | |
Wind waves Height (m) Direction Period (s) | — | — | — | E 8 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
— | — | — | 64 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 30 | 0 | 0 | 30 | 4 | 4 | 30 | 4 | 4 | 30 | 33 | 10 | 0 | 16 | 0 | 0 | 30 | 0 | 0 | 4 | 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.










