
Surf Forecasts:
Ikumi Beach surf forecast from 5 Sep 2026:
- Best quality surf: Sunday 6 Sep, 9PM (local time) - 10ft (3.0m), 9s period, ESE swell with cross-shore winds.
- Most powerful swell: Sunday 6 Sep, 9PM (local time) - 10ft (3.0m), 9s period, ESE swell with 1,361 kJ wave energy.
- Next surfable swell (1★+): Sunday 6 Sep, 9PM (local time) - 10ft (3.0m), 9s period with ESE 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 Sunday (Sep 06) at 9PM. The primary swell is predicted to be 3.0m and 9s period with a secondary swell of 1.2m and 10s. Another secondary swell of 0.8m and 4s is also forecast. The wind is predicted to be cross-shore as the swell arrives.
The most powerful waves expected at Ikumi Beach in the next 16 days are 3.0m 9s and forecast to arrive on Sunday (Sep 06) at 9PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.1m 5s period and expected on Monday (Sep 07) at 9AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9PM (Sun 6th Sep) | 10ft (3.0m) 9s |
| Best Surf | 9PM (Sun 6th Sep) | 10ft (3.0m) 9s |
| Most Powerful | 9PM (Sun 6th Sep) | 10ft (3.0m) 9s |
Table - best surf conditions forecast for Ikumi Beach over the next 16 days.
The Lowdown
G'day, I'm Rusty. Let's be straight with you – if you're looking to get wet around here over the next couple of weeks, you're going to have to be patient and pick your moments. The forecast period kicks off Sunday, September 6th, with some moderate swell arriving, but it's a bit of a messy start. The real standout window, and the only time I'd genuinely get excited, is from Wednesday, September 9th, through to Friday, September 11th. That's where the magic is hiding.
We've got a pulse of swell from the ESE/SE direction rolling in, but early on it's battling some cross-shore breeze and chop. The best of the lot arrives mid-week. On Wednesday, September 9th afternoon, Ikumi Beach sees a solid 6 ft swell from the SSE with a period of 8 seconds. The combined swell energy is moderate at 499, and the wind swings to a light cross-offshore from the NNW. That's a clean setup, and the water temp is about average for this time of year. It's a rare moment of quality at an inconsistent break, so make the most of it.
Thursday, September 10th is the pick of the bunch. The morning has 5 ft from the SSE with a light cross-offshore from the north, and by the afternoon, the wind drops to a glassy 3 mph from the NE. The swell is a touch smaller at 4 ft and the period is still a short 8 seconds, but with glassy conditions, the wave quality will be head and shoulders above everything else. The combined energy is moderate at 236, but the clean conditions make it a standout. This is the session to aim for.
Friday, September 11th morning keeps the good run going with 4 ft from the SSE and glassy conditions from the east. The energy is a bit weaker at 201, but it's still surfable and clean. After that, it starts to fade. The swell dips below 3 ft, and the winds become a bit more onshore or glassy but with very little push.
From Saturday, September 12th, onward, the swell drops off a cliff. We're looking at ankle-to-knee-high waves for the rest of the forecast period, with the combined energy falling into the double digits. There's a long gap of small, weak surf from the 12th right through to the end of the 16-day window on the 21st. Honestly, for a beach break like Ikumi, once the swell gets this small and the period is short, it's more of a splash-around than a proper surf. The conditions are often glassy, but there's just no wave to work with.
So, to wrap it up: the best surf is on Wednesday, September 9th afternoon, and Thursday, September 10th, with Friday morning 11th as a bonus. The water is about average for the time of year, and crowds are likely at this inconsistent spot, so get in early. After that, it's a long dry spell. Keep an eye on the forecasts, but for now, don't hold your breath.
Rusty.
Short Range ForecastHeavy rain (total 142mm), heaviest during Sun morning. Warm (max 29°C on Mon morning, min 22°C on Sun afternoon). Wind will be generally light. | Days 5-7 Weather SummaryHeavy rain (total 67mm), heaviest during Wed morning. Warm (max 28°C on Fri morning, min 23°C on Wed afternoon). Wind will be generally light. | ||||||||||||||||||
Sunday 6 | Monday 7 | Tuesday 8 | Wednesday 9 | Thursday 10 | Friday 11 | ||||||||||||||
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) | ESE 8 | ESE 9 | ESE 10 | ESE 10 | SE 10 | SE 9 | SE 9 | SE 8 | S 10 | S 9 | SSE 9 | SSE 8 | SSE 8 | SSE 8 | SSE 8 | SSE 8 | SSE 8 | SSE 8 | SSE 8 |
Wave Graph | |||||||||||||||||||
155 | 838 | 1269 | 710 | 646 | 388 | 314 | 156 | 186 | 341 | 464 | 443 | 331 | 306 | 215 | 154 | 169 | 131 | 81 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross-on | cross | cross | cross-on | cross | cross | cross | cross | cross | cross-off | cross-off | cross-off | glassy | cross-off | glassy | cross-on | cross-off |
High Tide | 10:59PM1.59m | 3:29PM1.53m | 1:00AM1.54m | 4:18PM1.64m | 2:46AM1.61m | 4:50PM1.74m | 3:53AM1.73m | 5:17PM1.81m | 4:44AM1.86m | 5:43PM1.87m | 5:27AM1.96m | 6:07PM1.91m | |||||||
Low Tide | 7:18AM0.66m | 8:15PM1.36m | 8:48AM0.59m | 9:40PM1.24m | 9:50AM0.50m | 10:25PM1.08m | 10:37AM0.43m | 11:00PM0.91m | 11:16AM0.39m | 11:31PM0.75m | 11:51AM0.38m | 00:02AM0.61m | |||||||
— | 5:39 | — | — | 5:39 | — | — | 5:39 | — | — | 5:41 | — | — | 5:41 | — | — | 5:41 | — | — | |
6:23 | — | 6:22 | — | — | 6:21 | — | — | 6:20 | — | — | 6:17 | — | — | 6:16 | — | — | 6:15 | — | |
mm | 22 | 52 | 42 | 14 | — | 1 | — | 2 | 9 | 20 | 23 | 24 | — | — | — | — | — | — | — |
Temp °C | 25 | 23 | 23 | 24 | 29 | 29 | 25 | 27 | 25 | 25 | 25 | 24 | 23 | 27 | 27 | 25 | 28 | 27 | 25 |
Feels °C | 26 | 24 | 23 | 24 | 31 | 31 | 27 | 29 | 29 | 28 | 29 | 27 | 25 | 29 | 30 | 28 | 32 | 31 | 29 |
Swell 1 Height (m) Direction Period (s) | ESE 8 | ESE 9 | ESE 10 | ESE 10 | SE 10 | SE 9 | SE 9 | SE 8 | SE 8 | S 9 | SSE 9 | SSE 8 | SSE 8 | SSE 8 | SSE 8 | SSE 8 | SSE 8 | SSE 8 | SSE 8 |
155 | 838 | 1269 | 710 | 646 | 388 | 314 | 156 | 149 | 341 | 464 | 443 | 331 | 306 | 215 | 154 | 169 | 131 | 81 | |
Swell 2 Height (m) Direction Period (s) | SSW 8 | SSW 9 | SSE 10 | SSE 9 | SW 8 | SE 11 | S 10 | S 10 | S 10 | SE 8 | E 18 | E 18 | E 16 | E 16 | E 15 | NE 4 | E 15 | E 14 | SE 10 |
41 | 16 | 75 | 431 | 18 | 31 | 104 | 125 | 186 | 147 | 6 | 6 | 5 | 5 | 4 | 5 | 17 | 15 | 24 | |
Swell 3 Height (m) Direction Period (s) | — | — | S 13 | SSW 8 | SW 10 | SSW 11 | SSW 11 | ESE 10 | ESE 10 | SE 10 | — | E 18 | — | — | E 18 | E 15 | ESE 10 | ESE 10 | E 14 |
— | — | 4 | 14 | 4 | 22 | 47 | 42 | 65 | 27 | — | 6 | — | — | 6 | 17 | 11 | 19 | 36 | |
Wind waves Height (m) Direction Period (s) | NNE 3 | NNE 4 | NNE 4 | NNE 4 | NNE 5 | NNE 5 | NE 4 | NE 4 | NE 4 | NNE 4 | NNE 4 | NNE 5 | NNE 5 | NNE 5 | NE 5 | N 4 | NE 4 | NNE 4 | NNE 4 |
8 | 14 | 21 | 33 | 50 | 20 | 18 | 26 | 12 | 9 | 28 | 44 | 56 | 33 | 11 | 16 | 4 | 9 | 9 | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 14 | 30 | 36 | 30 | 30 | 30 | 8 | 30 | 8 | 8 | 8 | 0 | 0 | 0 | 0 | 0 | 0 | 14 | 0 |
Best forecast wave conditions in Shikoku | |||||||||||||||||||
Best forecast wave conditions in Japan | |||||||||||||||||||
Header Global | |||||||||||||||||||
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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.










