
Surf Forecasts:
Ikumi Beach surf forecast from 7 Aug 2026:
- Best quality surf: Friday 7 Aug, 3PM (local time) - 11ft (3.5m), 12s period, SSE swell with onshore winds.
- Most powerful swell: Friday 7 Aug, 3PM (local time) - 11ft (3.5m), 12s period, SSE swell with 3,806 kJ wave energy.
- Next surfable swell (1★+): Friday 7 Aug, 3PM (local time) - 11ft (3.5m), 12s period with SSE 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 (Aug 07) at 3PM. The primary swell is predicted to be 3.5m and 12s period with a secondary swell of 0.1m and 15s. The wind is predicted to be onshore as the swell arrives.
The most powerful waves expected at Ikumi Beach in the next 16 days are 3.5m 12s and forecast to arrive on Friday (Aug 07) at 3PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.7m 12s period and expected on Tuesday (Aug 11) at 3PM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3PM (Fri 7th Aug) | 11ft (3.5m) 12s |
| Best Surf | 3PM (Fri 7th Aug) | 11ft (3.5m) 12s |
| Most Powerful | 3PM (Fri 7th Aug) | 11ft (3.5m) 12s |
Table - best surf conditions forecast for Ikumi Beach over the next 16 days.
The Lowdown
Alright, let’s get into it.
The next couple of weeks are a bit of a mixed bag for Ikumi Beach. We’ve got a serious pulse of swell coming in first, but it’s going to be too much of a good thing for this spot. After that, it fades out to almost nothing. Don’t get too excited about the long range just yet.
The First Push (August 7th)
Friday is the standout, but with a big warning. There’s a big SE groundswell rolling in with size. Friday morning we’re looking at a solid 13ft of SE swell with a 12-second period. That’s a ton of energy, with the combined energy reading a strong 9885. Honestly, this is way too big for Ikumi Beach. It’s an exposed beginner spot, and this is expert-only territory. The wind is a cross-on E at 12 mph, which will chop it up even more. It’s going to be a wild, challenging day. The water is 84°, which is a touch warmer than normal for this time of year, something you’ll notice when you’re getting thrashed.
The afternoon drops a little to 12ft, but it’s still way too big and unruly with the wind turning more onshore. This is a day to watch from the sand.
Settling Down (August 8th - 11th)
Saturday sees the swell dropping quickly to 6ft, but the conditions are still not great. Morning is a cross-on E breeze, though lighter. The afternoon cleans up with a light ESE offshore wind and 5ft of S swell. It’s surfable for the more experienced crew, but the drop in energy is massive, and it’s still a bit of a handful.
Sunday, the swell is down to 3ft with a 13-second period. It’s small and clean with light winds, but it’s pretty marginal. There’s not much push.
Monday and Tuesday serve up some glassy mornings with small, clean waves. We’re looking at 4ft of S and SSW swell with a 10-11 second period. The light ENE winds will have it clean and glassy. It’s not going to be epic, but there will be a few fun little waves for a log or a fish. These are the best of the small window.
The Drop-Off (August 12th onwards)
From Wednesday on, it’s a slide into nothing. The swell fades to under 3ft, and the energy just disappears. There are some glassy moments, but the swell is weak. The combined energy drops into the low hundreds, which is pretty gutless.
For the rest of the second week, from around the 14th to the 22nd, it’s mostly poor with tiny swell. There are a few chest-high days on the 15th and 18th, but the conditions are ordinary. Honestly, it’s a stretch of tiny, weak surf with a few clean windows for the beginners to get some whitewater practice.
The setup at Ikumi Beach just isn’t going to handle the big swell on Friday, and it’s not holding the smaller stuff well. A week from now, you’ll be looking at a long flat spell.
It’s not looking great at all. The only real standout is that big Friday swell, but it’s a beast you don’t want to mess with here.
- Rusty
Short Range ForecastHeavy rain (total 30mm), heaviest during Fri night. Warm (max 29°C on Sat afternoon, min 25°C on Sat night). Wind will be generally light. | Days 4-6 Weather SummaryModerate rain (total 15mm), heaviest on Wed night. Warm (max 29°C on Mon morning, min 23°C on Tue night). Wind will be generally light. | ||||||||||||||||||||
Friday 7 | Saturday 8 | Sunday 9 | Monday 10 | Tuesday 11 | Wednesday 12 | Thursday 13 | |||||||||||||||
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) | SSE 12 | SSE 12 | S 12 | S 11 | S 11 | SSW 11 | ESE 13 | E 13 | ESE 13 | S 10 | S 10 | S 11 | SSW 11 | S 11 | S 10 | S 10 | S 10 | SSW 10 | SSW 10 | SSW 9 | SSW 9 |
Wave Graph | |||||||||||||||||||||
5198 | 3806 | 1321 | 792 | 629 | 366 | 367 | 339 | 286 | 244 | 218 | 184 | 314 | 184 | 138 | 127 | 127 | 170 | 128 | 118 | 86 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | on | on | on | on | glassy | cross-on | on | glassy | glassy | glassy | glassy | glassy | cross | glassy | glassy | on | cross | cross-on | on | cross |
High Tide | 1:46PM1.44m | 11:54PM1.64m | 3:40PM1.52m | 1:21AM1.61m | 4:41PM1.64m | 2:48AM1.66m | 5:20PM1.74m | 3:55AM1.74m | 5:52PM1.82m | 4:48AM1.84m | 6:20PM1.88m | 5:34AM1.93m | 6:47PM1.92m | ||||||||
Low Tide | 6:05PM1.29m | 7:51AM0.60m | 8:11PM1.35m | 9:08AM0.51m | 9:44PM1.29m | 10:08AM0.40m | 10:39PM1.19m | 10:55AM0.31m | 11:20PM1.07m | 11:36AM0.25m | 11:55PM0.95m | 12:13PM0.24m | 00:28AM0.83m | ||||||||
5:18 | — | — | 5:18 | — | — | 5:20 | — | — | 5:20 | — | — | 5:20 | — | — | 5:22 | — | — | 5:22 | — | — | |
— | 6:58 | — | — | 6:57 | — | — | 6:55 | — | — | 6:54 | — | — | 6:53 | — | — | 6:52 | — | — | 6:52 | — | |
mm | 7 | 8 | 12 | 3 | — | — | — | — | — | — | 2 | — | — | 2 | 1 | 1 | 3 | 6 | 5 | 2 | 2 |
Temp °C | 27 | 27 | 26 | 28 | 29 | 26 | 29 | 29 | 26 | 29 | 28 | 26 | 28 | 28 | 26 | 27 | 25 | 24 | 26 | 27 | 25 |
Feels °C | 30 | 31 | 29 | 31 | 32 | 31 | 32 | 33 | 31 | 33 | 33 | 31 | 31 | 31 | 30 | 30 | 28 | 27 | 30 | 30 | 29 |
Swell 1 Height (m) Direction Period (s) | SSE 12 | SSE 12 | SE 10 | SE 9 | S 11 | SSW 11 | ESE 13 | E 13 | S 11 | S 10 | S 10 | S 11 | SSW 11 | S 11 | S 10 | S 10 | S 10 | SSW 10 | SSW 10 | SSW 9 | SSW 9 |
4687 | 3806 | 979 | 550 | 629 | 366 | 367 | 339 | 231 | 244 | 218 | 184 | 314 | 184 | 138 | 127 | 127 | 170 | 128 | 118 | 86 | |
Swell 2 Height (m) Direction Period (s) | — | E 15 | S 12 | S 11 | SE 8 | SE 8 | SE 8 | SSW 12 | ESE 13 | E 12 | E 12 | SW 12 | E 11 | SW 12 | SW 12 | SSW 11 | SSW 11 | E 10 | ESE 4 | ESE 6 | E 12 |
— | 4 | 1321 | 792 | 330 | 196 | 119 | 239 | 286 | 190 | 141 | 112 | 62 | 147 | 135 | 109 | 82 | 7 | 6 | 6 | 71 | |
Swell 3 Height (m) Direction Period (s) | — | — | — | SSW 14 | ESE 10 | ESE 10 | SSW 12 | SE 8 | SSW 11 | SW 12 | SW 12 | E 12 | SE 13 | E 11 | E 10 | E 10 | E 10 | SE 12 | E 10 | E 10 | ESE 4 |
— | — | — | 118 | 71 | 72 | 235 | 71 | 84 | 140 | 114 | 95 | 27 | 37 | 19 | 8 | 18 | 24 | 8 | 18 | 8 | |
Wind waves Height (m) Direction Period (s) | SE 12 | — | ESE 9 | — | — | — | — | — | — | — | — | N 3 | NE 4 | NNE 4 | — | NNE 3 | — | SE 3 | E 4 | E 5 | — |
5198 | — | 660 | — | — | — | — | — | — | — | — | 5 | 10 | 13 | — | 4 | — | 3 | 14 | 28 | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 486 | 471 | 381 | 30 | 33 | 0 | 30 | 33 | 0 | 0 | 0 | 0 | 0 | 4 | 0 | 0 | 30 | 8 | 30 | 30 | 4 |
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.











