
Surf Forecasts:
Ikumi Beach surf forecast from 1 Aug 2026:
- Best quality surf: Tuesday 4 Aug, 9AM (local time) - 10ft (3.0m), 17s period, ESE swell with onshore winds.
- Most powerful swell: Thursday 6 Aug, 6AM (local time) - 21ft (6.5m), 17s period, SE swell with 24,568 kJ wave energy.
- Next surfable swell (1★+): Saturday 1 Aug, 6PM (local time) - 1.5ft (0.4m), 11s 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 Saturday (Aug 01) at 6PM. The primary swell is predicted to be 0.2m and 18s period with a secondary swell of 0.4m and 11s. 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 6.5m 17s and forecast to arrive on Thursday (Aug 06) at 6AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 6s period and expected on Saturday (Aug 01) at 9PM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6PM (Sat 1st Aug) | 1.5ft (0.4m) 11s |
| Best Surf | 9AM (Tue 4th Aug) | 10ft (3.0m) 17s |
| Most Powerful | 6AM (Thu 6th Aug) | 21ft (6.5m) 17s |
Table - best surf conditions forecast for Ikumi Beach over the next 16 days.
The Lowdown
Grab your board and let's talk waves. The next couple of weeks start off slow, but there's a serious pulse of energy building that's going to shake things up. For now, the ocean’s mostly playing it cool, but don’t let that fool you—there’s some heavy water coming.
Ikumi Beach is the only spot on the radar, and it's a bit of a mixed bag. The water's running a touch warmer than usual for this time of year, sitting around 84°, which is nice.
For the first couple of days, it's pretty small. Saturday the 1st is basically flat—just knee-high dribble at 1ft with a weak, short-period swell. Not worth paddling out. The wind is glassy in the morning, but the lack of any real push makes it a no-go.
Sunday the 2nd is where things start to perk up. The morning still has that small 2ft swell, but the afternoon brings a bit more life with 4ft from the ESE, and the wind goes glassy. That’s a good sign. It's still small and the break is inconsistent, so you'll be waiting around, but it's clean.
Monday the 3rd, the swell bumps up to 5ft-5ft from the ESE with a solid 16-second period. This is proper groundswell energy. The catch is the wind turns onshore, making it a bit messy and the conditions feel a little iffy. It's surfable, but not great.
Now, here's where things get wild. From Tuesday the 4th through Saturday the 9th, the ocean just goes off. The swell direction stays mostly ESE-SSE, and the size just explodes. We're talking 10ft on Tuesday, topping out at a massive 21ft on Thursday morning. The wave energy is insane, hitting values like 15711 and even 22001. That's a lot of water moving. This is not for the faint of heart. At 10ft, it's already too big for most, and once it's over 8ft, this is strictly expert territory. For a spot that's usually inconsistent, this is a rare, powerful event. The wind is mostly cross-onshore, so it'll be a bit lumpy, but when it's that big, you take what you can get. Honestly, if you're not a solid charger, stay far away. This looks more like a tow-in or big-wave session, and for most of us, the setup looks more interesting for kite surfing than paddle surfing. By Friday the 7th it's still huge at 16ft, but the wind gets worse, and by Saturday the 8th it's dropping to 10ft but still heavy and stormy with thunderstorms around. This is a serious ocean.
After that big push, the swell backs down quickly. Sunday the 9th brings 6ft with a shorter period, and the wind is messy. It’s a step down, but the quality drops off hard. From the 10th to the 12th, it's poor. Small, onshore wind, and just ugly conditions. This is a good time to find something else to do or fix your board.
The back half of the forecast is a different story. It’s smaller, but it cleans up. Friday the 14th sees a little 3ft swell from the S with a nice 11-second period and glassy conditions. Easy, smooth, maybe a few little ones.
The real standout is Saturday the 15th. The swell bumps to 4ft in the morning and 5ft in the afternoon, coming from the E with a lovely 14-second period. The wind is completely glassy. This is as good as it gets for this spot. It’s still a beginner-friendly size, and while it's inconsistent, when the sets roll through, it'll be clean and lined up. Don't expect a crowd, but it might be worth it.
Sunday the 16th is a bit of a letdown. The swell is there at 7ft from the ESE, but the wind turns onshore, making it lumpy and less appealing.
Bottom line: If you're an experienced surfer, the massive swell from the 4th to the 8th is the big show, but it's dangerous. For everyone else, your best bet is the clean, glassy conditions on Saturday the 15th. It's not huge, but it'll be quality.
Rusty.
Short Range ForecastLight rain (total 6mm), mostly falling on Mon morning. Warm (max 33°C on Sun morning, min 26°C on Mon night). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 8mm), mostly falling on Thu afternoon. Warm (max 30°C on Wed morning, min 25°C on Tue night). Wind will be generally light. | ||||||||||||||||||||
Saturday 1 | Sunday 2 | Monday 3 | Tuesday 4 | Wednesday 5 | Thursday 6 | Friday 7 | |||||||||||||||
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 10 | SE 11 | SE 16 | ESE 18 | ESE 16 | ESE 15 | ESE 16 | ESE 16 | ESE 18 | ESE 17 | ESE 17 | ESE 17 | SE 17 | SE 17 | SE 17 | SSE 17 | SSE 16 | SSE 15 | S 16 | S 16 | S 15 |
Wave Graph | |||||||||||||||||||||
28 | 29 | 64 | 174 | 568 | 661 | 1081 | 1310 | 2888 | 4757 | 9130 | 11190 | 14466 | 18166 | 23386 | 22001 | 16636 | 12183 | 12066 | 10270 | 6533 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | cross-on | cross-off | glassy | glassy | cross | on | on | on | on | on | cross | cross-on | cross-on | cross | cross-on | on | cross-on | cross-on | on | cross-on |
High Tide | 8:12PM1.90m | 8:02AM1.91m | 8:40PM1.88m | 8:45AM1.83m | 9:08PM1.85m | 9:33AM1.72m | 9:38PM1.80m | 10:30AM1.59m | 10:12PM1.75m | 11:49AM1.48m | 10:54PM1.69m | 1:46PM1.44m | 11:54PM1.64m | ||||||||
Low Tide | 1:49PM0.33m | 2:06AM0.71m | 2:22PM0.45m | 2:43AM0.66m | 2:55PM0.61m | 3:24AM0.63m | 3:29PM0.78m | 4:11AM0.63m | 4:06PM0.96m | 5:09AM0.65m | 4:51PM1.14m | 6:23AM0.65m | 6:05PM1.29m | ||||||||
5:13 | — | — | 5:15 | — | — | 5:15 | — | — | 5:16 | — | — | 5:16 | — | — | 5:18 | — | — | 5:18 | — | — | |
— | 7:02 | — | — | 7:01 | — | — | 7:00 | — | — | 7:00 | — | — | 7:00 | — | — | 6:59 | — | — | 6:58 | — | |
mm | — | — | — | — | — | — | 1 | 2 | 3 | — | — | — | — | — | — | — | 3 | 5 | — | 3 | 6 |
Temp °C | 32 | 32 | 29 | 33 | 33 | 30 | 30 | 28 | 26 | 27 | 28 | 26 | 30 | 30 | 27 | 30 | 30 | 27 | 30 | 29 | 27 |
Feels °C | 35 | 35 | 33 | 37 | 38 | 35 | 34 | 32 | 30 | 30 | 31 | 30 | 32 | 33 | 30 | 31 | 32 | 31 | 32 | 31 | 31 |
Swell 1 Height (m) Direction Period (s) | SE 10 | SE 11 | SE 16 | ESE 18 | ESE 16 | ESE 15 | ESE 16 | ESE 16 | ESE 18 | ESE 17 | ESE 18 | ESE 17 | SE 17 | SE 17 | SE 17 | SSE 17 | SSE 16 | SSE 15 | S 16 | S 16 | S 15 |
28 | 29 | 64 | 174 | 568 | 661 | 1081 | 1310 | 2888 | 4757 | 6581 | 11190 | 14466 | 18166 | 23386 | 22001 | 16636 | 12183 | 12066 | 10270 | 6533 | |
Swell 2 Height (m) Direction Period (s) | SSW 4 | ESE 17 | SE 11 | ESE 14 | S 7 | SE 10 | ESE 6 | S 8 | ESE 7 | — | — | — | — | — | — | — | — | — | — | — | E 10 |
4 | 28 | 18 | 120 | 4 | 15 | 55 | 5 | 251 | — | — | — | — | — | — | — | — | — | — | — | 53 | |
Swell 3 Height (m) Direction Period (s) | S 7 | S 4 | ESE 19 | SE 9 | SSW 8 | SSW 8 | SSE 10 | S 8 | — | — | — | — | — | — | — | — | — | — | — | — | — |
1 | 1 | 35 | 41 | 7 | 6 | 9 | 4 | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | — | — | SW 5 | NE 4 | NE 4 | — | E 6 | ESE 7 | — | E 8 | ESE 17 | — | — | — | — | — | — | — | — | — | E 10 |
— | — | 8 | 8 | 7 | — | 132 | 230 | — | 573 | 9130 | — | — | — | — | — | — | — | — | — | 125 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 446 | 445 | 0 | 0 | 0 | 14 | 30 | 371 | 30 | 30 | 30 | 10 | 47 | 471 | 47 | 434 | 486 | 14 | 486 | 486 | 33 |
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.











