Surf Forecasts:
Ikumi Beach surf forecast from 13 Aug 2026:
- Best quality surf: Friday 14 Aug, 9AM (local time) - 2.5ft (0.7m), 9s period, S swell with glassy winds.
- Most powerful swell: Friday 21 Aug, 9AM (local time) - 3.5ft (1.0m), 10s period, S swell with 208 kJ wave energy.
- Next surfable swell (1★+): Friday 14 Aug, 9AM (local time) - 2.5ft (0.7m), 9s 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 (Aug 14) at 9AM. The primary swell is predicted to be 0.7m and 9s period with a secondary swell of 0.4m and 9s. 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 1.0m 10s and forecast to arrive on Friday (Aug 21) at 9AM. Winds are predicted to be onshore at the time the swell arrives.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9AM (Fri 14th Aug) | 2.5ft (0.7m) 9s |
| Best Surf | 9AM (Fri 14th Aug) | 2.5ft (0.7m) 9s |
| Most Powerful | 9AM (Fri 21st Aug) | 3.5ft (1.0m) 10s |
Table - best surf conditions forecast for Ikumi Beach over the next 16 days.
The Lowdown
Alright folks, Rusty here with the skinny on what's coming up.
Don't get your hopes up for the first few days. From Thursday the 13th through the middle of the next week, it's pretty much a desert. The water temp is sitting at a balmy 84°, which is normal for this time of year. We're talking tiny, weak, and messy surf. A real dull stretch from Thursday afternoon all the way until Wednesday the 19th. Nothing worth rushing for.
The first sign of life comes on Friday the 21st of August. The afternoon looks glassy with a 2ft S swell at 11 seconds. The combined energy climbs to a moderate 201. Some long-period energy and clean conditions should make for some fun, small waves. Saturday the 22nd keeps it going with a glassy morning and 3ft S swell, energy at 215. A decent little window for a casual session.
Now, the big one. The one you want to lock in. Ikumi Beach is the only break on the menu, and it fires on Sunday the 23rd of August. Sunday morning we've got a serious 6ft SE swell with a massive 16-second period. That's proper groundswell power with a combined energy of 2067 (strong). And glass, absolutely glassy. The afternoon sees it jump to 8ft SE, same 16-second period and an energy of 3197 (strong). Another flat calm, glassy day. For experienced guys, this is the session of the forecast. These waves will have some serious grunt. The long period could make it a little walled-off at a beach, but with zero wind, it's going to be clean and heavy.
After that, Monday the 24th and Tuesday the 25th see the swell get out of control. We're talking 12ft to 13ft with energy readings soaring past 6500. Way too massive for this spot. Strictly for experts only, and even then, the forecast suggests it might be too big for the break itself.
Things settle down by Thursday the 27th of August with a cleaner 5ft ESE swell at 12 seconds. Combined energy is a moderate 796, and it's glassy again in the morning. Not as epic as that Sunday, but a solid, clean day to finish the run.
Bottom line: the first week and a half is a wash. Your standout, can't-miss day is Sunday the 23rd for some serious, clean, powerful groundswell. After that, it's either way too big or it drops off.
Rusty.
Short Range ForecastHeavy rain (total 38mm), heaviest during Sat night. Warm (max 29°C on Sat morning, min 24°C on Fri night). Wind will be generally light. | Days 4-6 Weather SummaryModerate rain (total 13mm), heaviest on Mon night. Warm (max 29°C on Tue afternoon, min 25°C on Mon night). Wind will be generally light. | ||||||||||||||||||||
Friday 14 | Saturday 15 | Sunday 16 | Monday 17 | Tuesday 18 | Wednesday 19 | Thursday 20 | |||||||||||||||
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 9 | S 9 | S 8 | S 10 | S 9 | ESE 5 | ESE 5 | ESE 6 | ESE 6 | ESE 5 | ESE 9 | ESE 9 | ESE 10 | E 10 | SE 10 | SE 7 | ESE 7 | ESE 8 | SE 8 | SE 10 | S 11 |
Wave Graph  | |||||||||||||||||||||
 kJ | 73 | 73 | 52 | 94 | 79 | 59 | 80 | 150 | 100 | 51 | 113 | 96 | 74 | 46 | 27 | 44 | 70 | 95 | 57 | 32 | 112 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | cross | off | glassy | on | cross-on | on | on | on | on | on | on | cross-on | on | glassy | cross-on | on | glassy | cross-on | on | cross-on |
High Tide | 7:13PM1.94m | 6:56AM2.01m | 7:39PM1.94m | 7:35AM1.99m | 8:04PM1.93m | 8:16AM1.92m | 8:30PM1.90m | 8:59AM1.82m | 8:58PM1.86m | 9:48AM1.68m | 9:27PM1.81m | 10:51AM1.55m | 10:01PM1.74m | ||||||||
Low Tide | 12:48PM0.27m | 1:01AM0.72m | 1:20PM0.34m | 1:34AM0.63m | 1:52PM0.45m | 2:09AM0.57m | 2:23PM0.59m | 2:46AM0.55m | 2:54PM0.76m | 3:27AM0.55m | 3:26PM0.93m | 4:16AM0.59m | 4:02PM1.10m | ||||||||
 |  |  | | |  | | | |  | | | |  |  |  | |  | | | | |
 | 5:22 | — | — | 5:24 | — | — | 5:24 | — | — | 5:24 | — | — | 5:26 | — | — | 5:26 | — | — | 5:26 | — | — |
 | — | 6:51 | — | — | 6:50 | — | — | 6:49 | — | — | 6:46 | — | — | 6:45 | — | — | 6:45 | — | — | 6:44 | — |
mm | — | 1 | — | — | — | 13 | 9 | 5 | 10 | 2 | 1 | 6 | — | — | — | — | 2 | 2 | 2 | 4 | 7 |
Temp °C | 28 | 28 | 25 | 29 | 29 | 25 | 26 | 27 | 25 | 27 | 28 | 26 | 28 | 29 | 26 | 28 | 27 | 26 | 28 | 27 | 26 |
Feels °C | 30 | 30 | 29 | 32 | 32 | 28 | 29 | 30 | 28 | 31 | 32 | 31 | 31 | 33 | 31 | 31 | 32 | 31 | 33 | 32 | 31 |
Swell 1 Height (m) Direction Period (s) | S 9 | S 9 | S 8 | S 10 | S 9 | S 9 | S 8 | S 9 | S 8 | ESE 5 | ESE 9 | ESE 9 | ESE 10 | SE 4 | ESE 5 | SE 7 | ESE 7 | ESE 8 | SE 8 | ESE 8 | S 11 |
| kJ | 73 | 73 | 52 | 94 | 79 | 56 | 51 | 40 | 35 | 51 | 113 | 96 | 74 | 10 | 21 | 44 | 61 | 95 | 57 | 32 | 112 |
Swell 2 Height (m) Direction Period (s) | ESE 9 | ESE 9 | S 11 | E 10 | E 10 | ESE 9 | E 10 | ESE 10 | ESE 10 | S 8 | SSW 8 | SSW 8 | SSW 8 | E 10 | SE 10 | SE 10 | SE 10 | ESE 10 | SE 10 | SE 10 | SE 7 |
| kJ | 28 | 17 | 37 | 30 | 30 | 27 | 53 | 35 | 31 | 34 | 21 | 21 | 20 | 46 | 27 | 27 | 46 | 10 | 23 | 25 | 41 |
Swell 3 Height (m) Direction Period (s) | SE 11 | SE 11 | E 9 | SSE 8 | SE 8 | SE 12 | SE 12 | SE 11 | SE 11 | SE 11 | SE 11 | SE 11 | SE 11 | SSW 8 | SSW 8 | SSW 8 | SSW 8 | S 9 | SSW 9 | S 9 | SE 11 |
| kJ | 20 | 19 | 27 | 6 | 10 | 22 | 49 | 45 | 43 | 42 | 30 | 30 | 29 | 20 | 12 | 12 | 12 | 7 | 25 | 28 | 29 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | E 4 | ESE 5 | ESE 5 | ESE 6 | ESE 6 | — | — | SE 4 | — | — | — | — | ESE 6 | — | — | — | — |
| kJ | — | — | — | — | 9 | 59 | 80 | 150 | 100 | — | — | 15 | — | — | — | — | 70 | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 4 | 0 | 0 | 33 | 30 | 272 | 371 | 30 | 30 | 371 | 30 | 14 | 30 | 0 | 8 | 30 | 0 | 30 | 30 | 30 |
Best forecast wave conditions in Shikoku | |||||||||||||||||||||
Best forecast wave conditions in Japan | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
FREE! Surf-Forecast.com widget for your website
The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Ikumi Beach surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.
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.
Nearest