Surf Forecasts:
Ikumi Beach surf forecast from 31 Jul 2026:
- Best quality surf: Tuesday 4 Aug, 6AM (local time) - 10ft (3.0m), 17s period, ESE swell with glassy winds.
- Most powerful swell: Thursday 6 Aug, 9AM (local time) - 23ft (7.0m), 18s period, SE swell with 32,408 kJ wave energy.
- Next surfable swell (1★+): Friday 31 Jul, 9PM (local time) - 1.5ft (0.4m), 9s 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 Friday (Jul 31) at 9PM. The primary swell is predicted to be 0.4m and 9s period with a secondary swell of 0.3m and 11s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Ikumi Beach in the next 16 days are 7.0m 18s and forecast to arrive on Thursday (Aug 06) at 9AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.6m 3s period and expected on Monday (Aug 03) at 12AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9PM (Fri 31st Jul) | 1.5ft (0.4m) 9s |
| Best Surf | 6AM (Tue 4th Aug) | 10ft (3.0m) 17s |
| Most Powerful | 9AM (Thu 6th Aug) | 23ft (7.0m) 18s |
Table - best surf conditions forecast for Ikumi Beach over the next 16 days.
The Lowdown
Right, mate, let’s have a look at what’s cookin’ for Ikumi Beach.
The next couple of weeks are a bit of a mixed bag, with some real juicy windows if you’re patient. The pattern starts small, with some clean but tiny waves on Friday the 31st, then a fair gap before things start to get interesting. Sunday the 2nd is where the first real spark happens, with a glassy morning and a long-period groundswell starting to fill in. That swell is from the ESE, with a period of 18 seconds, which is proper long, so it’ll be a bit more lined up at the point. The water is a touch warmer than normal for this time of year, sitting at 84°, so you’ll be comfortable in boardshorts.
The standout comes on Sunday the 2nd, but to be honest, the real standout is the whole window from Sunday morning through to Tuesday the 13th, with a few caveats. The best of the best is likely Wednesday the 12th and Thursday the 13th. On Wednesday the 12th, you’ve got clean glassy conditions in the morning, with a 5ft swell from the SE, period 12s, and the combined energy is moderate (843). That’s a fun, makeable wave. The afternoon gets a cross-offshore wind, which will keep it clean. Then Thursday the 13th, you’re looking at a totally glassy, calm morning, with a 4ft swell from the ESE, period 12s, and combined energy is moderate (943). That’s a beautiful day for a paddle.
Now, a word of warning: from Tuesday the 4th through to Friday the 7th, the swell gets way too big for this break. You’re looking at 10ft to 26ft, with the wind mostly onshore or cross-onshore, and the combined energy hits massive numbers (over 5000, even 51390). That’s for experts only, and even then, it’s likely a washing machine. Kite surfers would be having a field day, but for a paddle surfer, it’s a no-go.
Ikumi Beach is an inconsistent break, so don’t be surprised if you have to sit through a few days of nothing. The crowds are listed as “often,” so expect company on the good days. The swell direction for the standout days is ESE, which is a good direction for this spot.
So, to sum it up: the first week is mostly small or too big. The real sweet spot is the morning of Wednesday the 12th and Thursday the 13th, with clean, glassy conditions and a fun 4ft to 5ft groundswell. That’s your best bet. A promising but less certain window is also around Sunday the 2nd, but the swell is still ramping up.
Rusty.
Short Range ForecastMostly dry. Warm (max 34°C on Sun afternoon, min 27°C on Fri night). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 6mm), mostly falling on Mon afternoon. Warm (max 31°C on Mon morning, min 26°C on Mon night). Wind will be generally light. | ||||||||||||||||||||
Friday 31 | Saturday 1 | Sunday 2 | Monday 3 | Tuesday 4 | Wednesday 5 | Thursday 6 | |||||||||||||||
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 9 | SE 13 | SE 10 | SE 10 | SE 11 | SE 16 | ESE 18 | ESE 16 | ESE 15 | ESE 15 | ESE 16 | ESE 18 | ESE 18 | ESE 18 | ESE 17 | SE 17 | SE 17 | SE 18 | SE 18 | SSE 17 | SSE 17 |
Wave Graph  | |||||||||||||||||||||
 kJ | 24 | 26 | 23 | 28 | 29 | 64 | 174 | 636 | 621 | 867 | 1393 | 3777 | 5132 | 6059 | 9156 | 10308 | 13773 | 21236 | 32408 | 29237 | 25918 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | cross-on | off | glassy | cross-on | cross-off | glassy | glassy | cross | cross-on | on | on | on | on | glassy | cross-on | on | cross-on | cross-on | cross-on | cross |
High Tide | 7:45PM1.91m | 7:20AM1.96m | 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 | ||||||||
Low Tide | 1:15PM0.23m | 1:30AM0.78m | 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 | ||||||||
 | |  | | | | |  | | |  |  | | | | | | | | | | |
 | 5:13 | — | — | 5:13 | — | — | 5:15 | — | — | 5:15 | — | — | 5:16 | — | — | 5:16 | — | — | 5:18 | — | — |
 | — | 7:04 | — | — | 7:02 | — | — | 7:01 | — | — | 7:00 | — | — | 7:00 | — | — | 7:00 | — | — | 6:59 | — |
mm | — | — | — | — | — | — | — | — | — | — | 2 | 2 | 1 | 1 | — | — | — | — | — | — | 3 |
Temp °C | 32 | 32 | 28 | 32 | 32 | 29 | 33 | 34 | 30 | 31 | 29 | 27 | 30 | 28 | 26 | 30 | 30 | 27 | 30 | 31 | 27 |
Feels °C | 35 | 36 | 32 | 34 | 35 | 33 | 37 | 39 | 34 | 35 | 34 | 33 | 34 | 32 | 30 | 33 | 33 | 32 | 31 | 32 | 30 |
Swell 1 Height (m) Direction Period (s) | SE 9 | SE 9 | SE 10 | SE 10 | SE 11 | SE 16 | ESE 18 | ESE 16 | ESE 15 | ESE 15 | ESE 16 | ESE 18 | ESE 18 | ESE 18 | ESE 17 | SE 17 | SE 17 | SE 18 | SE 18 | SSE 17 | SSE 17 |
| kJ | 23 | 23 | 23 | 28 | 29 | 64 | 174 | 636 | 621 | 867 | 1393 | 3777 | 5132 | 6059 | 9156 | 10308 | 13773 | 21236 | 32408 | 29237 | 25918 |
Swell 2 Height (m) Direction Period (s) | SSW 5 | S 4 | SE 11 | SSW 4 | ESE 17 | SE 11 | ESE 14 | S 7 | SE 10 | SE 10 | S 8 | — | — | — | — | — | — | — | — | — | — |
| kJ | 4 | 1 | 20 | 2 | 28 | 29 | 120 | 4 | 15 | 15 | 5 | — | — | — | — | — | — | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | SE 12 | SE 13 | SSW 5 | S 7 | S 4 | ESE 19 | SE 9 | SSW 8 | SSW 8 | S 8 | S 8 | — | — | — | — | — | — | — | — | — | — |
| kJ | 24 | 26 | 2 | 1 | 1 | 35 | 41 | 7 | 6 | 5 | 4 | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | N 3 | SW 5 | — | — | WSW 2 | NE 4 | NNE 4 | NNE 3 | E 4 | ESE 6 | E 6 | E 6 | ESE 7 | — | — | — | — | — | E 9 | — |
| kJ | — | 1 | 11 | — | — | 1 | 5 | 7 | 9 | 22 | 75 | 173 | 166 | 172 | — | — | — | — | — | 1494 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 36 | 0 | 470 | 445 | 0 | 0 | 0 | 8 | 30 | 30 | 30 | 30 | 30 | 4 | 30 | 33 | 33 | 434 | 434 | 486 |
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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