
Surf Forecasts:
Ikumi Beach surf forecast from 13 Sep 2026:
- Best quality surf: Saturday 19 Sep, 9AM (local time) - 11ft (3.5m), 15s period, ESE swell with cross-onshore winds.
- Most powerful swell: Monday 21 Sep, 3AM (local time) - 15ft (4.5m), 14s period, SSE swell with 8,408 kJ wave energy.
- Next surfable swell (1★+): Monday 14 Sep, 6AM (local time) - 3.5ft (1.0m), 8s 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 Monday (Sep 14) at 6AM. The primary swell is predicted to be 1.0m and 8s period with a secondary swell of 0.3m and 13s. 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 4.5m 14s and forecast to arrive on Monday (Sep 21) at 3AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.0m 4s period and expected on Sunday (Sep 20) at 6AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6AM (Mon 14th Sep) | 3.5ft (1.0m) 8s |
| Best Surf | 9AM (Sat 19th Sep) | 11ft (3.5m) 15s |
| Most Powerful | 3AM (Mon 21st Sep) | 15ft (4.5m) 14s |
Table - best surf conditions forecast for Ikumi Beach over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s take a good, hard look at what Ikumi Beach has got cookin’ over the next couple of weeks. It’s a mixed bag, and you’re gonna have to pick your moments.
Right off the bat, Monday the 14th has some tiny 3ft surf rolling in from the southeast, but the real gem is the zero wind in the morning – glassy conditions. The combined energy is weak, only 148, so it’s just small fun waves for a beginner on the longboard. It’s a little inconsistent here, and crowds are often an issue, so be ready to share the peak. The water temp is about average for the time of year.
Tuesday the 15th is where it gets interesting. We’ve got a pulse of swell coming in at 4ft from the southeast, and the wind is dead glass all day. This is the standout window for the first week. The energy jumps to a solid moderate 284, and you can expect clean, user-friendly waves in the morning. The southeast swell direction is a perfect match for what this break likes.
The swell drops off a bit on Wednesday and Thursday, leaving us with weak 3ft to 3ft surf with cross-onshore winds. Not worth paddling out for.
Now, Friday the 18th sees a jump in size – 8ft in the morning from the east – but the combined energy is a strong 1138. Problem is, the wind is messy cross-onshore, and the period is a short 8 seconds. It’s gonna be lumpy and hard to manage. The afternoon cleans up a bit, dropping to 5ft, but conditions are still only marginal.
Saturday the 19th is the big one – but it’s a beast. We’re looking at 12ft from the southeast with a very long 15-second period. The energy is enormous at 4717. This is expert territory only; it’s well over 8ft and will be too powerful and heavy for anyone without serious experience. The wind is cross-onshore in the morning and gets stronger and choppier in the afternoon. If you’re not a pro, sit this one out.
This swell hangs on through Sunday (20th) and Monday (21st), still peaking around 12ft to 15ft, but the wind turns cross-shore. The setup looks more interesting for kite surfing than paddle surfing, honestly, because the wave size is intimidating and the conditions are messy.
By Tuesday the 22nd, it gets ugly with heavy rain and a severe gale. Avoid the water completely.
After that, the surf drops off a cliff. Wednesday the 23rd through Thursday the 25th has small, wind-affected junk. Not worth a mention.
There is one more glimmer, though. Friday the 25th afternoon has a clean 6ft swell from the southeast with glassy conditions. The energy is moderate at 445. That’s your second-best option, but it’s a one-off window.
Tuesday the 29th finally gives us a proper swell for experienced surfers. We’ve got 7ft from the east-southeast with a clean offshore wind (cross-off). The energy is strong at 1613, and the period is a solid 10 seconds. This is the best of the second week – an excellent call for those who know what they’re doing.
So, to boil it down: Tuesday the 15th morning is the top pick for all levels – clean, fun, small waves. For experienced crew, Tuesday the 29th morning offers the best size and quality in the later part of the forecast. Everything else is a gamble or a miss.
Stay stoked, and pick your days wisely.
Rusty.
Short Range ForecastModerate rain (total 13mm), heaviest on Wed afternoon. Warm (max 29°C on Mon morning, min 23°C on Mon night). Wind will be generally light. | Days 5-7 Weather SummaryModerate rain (total 17mm), heaviest on Thu night. Warm (max 30°C on Sat afternoon, min 23°C on Wed night). Wind will be generally light. | ||||||||||||||||||
Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | Saturday 19 | ||||||||||||||
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 8 | SE 8 | SE 10 | SE 9 | SE 9 | SE 9 | SE 9 | SE 9 | SE 9 | SE 9 | ESE 9 | E 8 | E 8 | ESE 8 | ESE 16 | ESE 15 | ESE 14 | SE 13 |
Wave Graph | |||||||||||||||||||
145 | 132 | 138 | 296 | 266 | 231 | 178 | 112 | 107 | 110 | 110 | 94 | 371 | 783 | 370 | 1953 | 4711 | 5227 | 4185 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | glassy | cross-on | glassy | glassy | glassy | cross-off | cross-on | cross-on | cross | cross-on | cross-on | cross-on | cross-on | on | cross | cross-on | cross-on | cross |
High Tide | 7:23AM2.02m | 7:21PM1.95m | 8:01AM1.94m | 7:45PM1.92m | 8:43AM1.83m | 8:12PM1.88m | 9:30AM1.70m | 8:41PM1.81m | 10:31AM1.56m | 9:14PM1.72m | 12:08PM1.46m | 10:02PM1.61m | |||||||
Low Tide | 1:06AM0.40m | 1:24PM0.61m | 1:39AM0.36m | 1:53PM0.74m | 2:15AM0.36m | 2:23PM0.88m | 2:54AM0.40m | 2:54PM1.03m | 3:40AM0.48m | 3:29PM1.18m | 4:41AM0.58m | 4:26PM1.31m | |||||||
— | 5:43 | — | — | 5:45 | — | — | 5:46 | — | — | 5:46 | — | — | 5:47 | — | — | 5:48 | — | — | |
6:13 | — | 6:12 | — | — | 6:09 | — | — | 6:08 | — | — | 6:07 | — | — | 6:06 | — | — | 6:05 | — | |
mm | — | — | — | 1 | 3 | 2 | 1 | 1 | 5 | 1 | — | 2 | 10 | 3 | 1 | — | — | — | — |
Temp °C | 26 | 29 | 28 | 24 | 27 | 27 | 24 | 26 | 26 | 24 | 27 | 27 | 24 | 26 | 26 | 25 | 28 | 30 | 25 |
Feels °C | 32 | 33 | 30 | 28 | 32 | 31 | 28 | 29 | 29 | 27 | 29 | 29 | 27 | 29 | 29 | 28 | 29 | 31 | 27 |
Swell 1 Height (m) Direction Period (s) | SE 9 | SE 8 | SE 8 | SE 10 | SE 9 | SE 9 | SE 9 | SE 9 | SE 9 | SE 9 | SE 9 | ESE 9 | ESE 8 | ESE 8 | ESE 8 | ESE 16 | ESE 15 | ESE 14 | SE 13 |
145 | 132 | 138 | 296 | 266 | 231 | 178 | 112 | 107 | 110 | 110 | 94 | 196 | 338 | 370 | 1953 | 4711 | 5227 | 4185 | |
Swell 2 Height (m) Direction Period (s) | E 13 | E 13 | E 12 | E 12 | S 7 | E 13 | E 13 | E 12 | S 7 | E 13 | E 12 | E 12 | E 12 | SE 20 | SE 18 | ESE 8 | S 9 | SSW 9 | — |
29 | 13 | 12 | 12 | 1 | 14 | 12 | 3 | 1 | 3 | 3 | 3 | 3 | 15 | 161 | 330 | 6 | 7 | — | |
Swell 3 Height (m) Direction Period (s) | S 6 | S 6 | S 7 | S 7 | E 15 | S 6 | S 6 | E 14 | S 7 | S 7 | S 7 | — | S 7 | S 11 | S 10 | S 10 | — | — | — |
3 | 3 | 1 | 1 | 17 | 1 | 1 | 4 | 1 | 1 | 1 | — | 1 | 2 | 2 | 7 | — | — | — | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | NE 3 | NE 3 | — | NE 3 | NE 3 | E 8 | E 8 | — | — | — | — | — |
— | — | — | — | — | — | — | 2 | 2 | — | 5 | 2 | 371 | 783 | — | — | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 0 | 0 | 4 | 0 | 0 | 0 | 0 | 8 | 30 | 8 | 8 | 30 | 30 | 14 | 30 | 8 | 14 | 30 | 10 |
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)
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.










