Surf Forecasts:
Ikumi Beach surf forecast from 4 Sep 2026:
- Best quality surf: Monday 7 Sep, 6PM (local time) - 5ft (1.6m), 9s period, SE swell with cross-offshore winds.
- Most powerful swell: Sunday 6 Sep, 6PM (local time) - 8ft (2.5m), 10s period, ESE swell with 1,384 kJ wave energy.
- Next surfable swell (1★+): Monday 7 Sep, 6PM (local time) - 5ft (1.6m), 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 Monday (Sep 07) at 6PM. The primary swell is predicted to be 1.6m and 9s period with a secondary swell of 0.5m and 11s. Another secondary swell of 1.1m and 5s is also forecast. 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 2.5m 10s and forecast to arrive on Sunday (Sep 06) at 6PM. 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 4s period and expected on Monday (Sep 07) at 12AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6PM (Mon 7th Sep) | 5ft (1.6m) 9s |
| Best Surf | 6PM (Mon 7th Sep) | 5ft (1.6m) 9s |
| Most Powerful | 6PM (Sun 6th Sep) | 8ft (2.5m) 10s |
Table - best surf conditions forecast for Ikumi Beach over the next 16 days.
The Lowdown
Alright, let’s talk about Ikumi Beach. It’s gonna be a bit of a mixed bag, but there’s a real window of gold if you’re patient.
Right now, the surf is small and the wind is messy. We’ve got a weak 3ft swell from the south, combined energy is only 218, and the wind is cross-shore. It’s choppy and not worth paddling out for. The water temp is about average for this time of year, so nothing unusual there.
Saturday the 5th stays small and poor, with the wind turning cross-onshore. Sunday the 6th sees a jump in size – 6ft to 7ft – but it’s coming from the ESE, which isn’t ideal for this spot, and the wind is cross to cross-on. The combined energy climbs into the moderate range (519 to 984), but the conditions are still messy. Not the clean lines you want.
Monday the 7th and Tuesday the 8th stay marginal, with similar-sized swell, cross-shore winds, and that same ESE direction. The wave comment keeps saying “marginal” – it’s frustrating, but it’s not awful.
Wednesday the 9th and Thursday the 10th are still on the fence. The swell hangs around 4ft to 6ft, but the wind is cross-shore. The real change comes Friday the 11th morning. The wind goes glassy, and we get a 4ft SSE swell with a combined energy of 238. It’s clean, it’s glassy, and it’s surfable. That’s the first real standout – a small but fun morning session.
Now, the big one. Sunday the 13th afternoon, we get a 6ft easterly swell with a short period of 7 seconds, but the wind is glassy. The combined energy jumps to 638. That’s a solid afternoon session. But the real standout is Monday the 14th morning. 7ft from the east, period 9 seconds, glassy wind, and a combined energy of 1084. That’s strong, clean, and powerful. This is the best on offer – but at 7ft, it’s pushing into expert territory. Not for beginners.
Tuesday the 15th morning is still glassy with a 4ft ESE swell, but the energy drops. From Wednesday the 16th onwards, the surf fades fast. By Thursday the 17th, we’re down to 2ft, and by the weekend, it’s flat – 1.0ft or less. The last 10 days of the forecast are a barren run, with basically no surf worth mentioning.
So, if you’re keen, you’ve got a few clean windows: Friday the 11th morning for a small glassy session, Sunday the 13th afternoon for a punchy east swell, and Monday the 14th morning for the best, most powerful glassy conditions. After that, it’s a long wait.
Rusty
Short Range ForecastHeavy rain (total 117mm), heaviest during Sun night. Warm (max 29°C on Mon afternoon, min 21°C on Fri night). Wind will be generally light. | Days 5-7 Weather SummaryHeavy rain (total 50mm), heaviest during Wed night. Warm (max 30°C on Tue morning, min 22°C on Wed night). Wind will be generally light. | ||||||||||||||||||
Saturday 5 | Sunday 6 | Monday 7 | Tuesday 8 | Wednesday 9 | Thursday 10 | ||||||||||||||
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) | SSW 10 | S 9 | SSW 9 | ESE 7 | ESE 9 | ESE 10 | ESE 11 | SE 10 | SE 10 | SE 10 | SE 10 | SE 9 | SE 9 | SE 8 | SSE 9 | SSE 9 | SSE 9 | SSE 9 | SSE 8 |
Wave Graph  | |||||||||||||||||||
 kJ | 201 | 169 | 106 | 121 | 513 | 951 | 990 | 653 | 469 | 484 | 262 | 217 | 194 | 153 | 292 | 490 | 435 | 502 | 284 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross-on | cross | cross-on | cross | cross-off | cross | cross-on | cross-off | cross | cross-on | cross | cross | cross | cross | cross | cross | glassy |
High Tide | 9:56PM1.69m | 1:30PM1.45m | 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 | |||||||
Low Tide | 5:39AM0.64m | 5:24PM1.36m | 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 | |||||||
 |  | |  |  |  | |  |  |  |  | | | |  | | | |  | |
 | — | 5:37 | — | — | 5:39 | — | — | 5:39 | — | — | 5:39 | — | — | 5:41 | — | — | 5:41 | — | — |
 | 6:24 | — | 6:23 | — | — | 6:22 | — | — | 6:21 | — | — | 6:20 | — | — | 6:17 | — | — | 6:16 | — |
mm | 14 | — | — | 2 | 9 | 26 | 65 | 1 | — | — | — | — | 3 | 6 | 2 | 21 | 18 | — | — |
Temp °C | 22 | 24 | 25 | 24 | 24 | 23 | 24 | 26 | 29 | 25 | 30 | 30 | 26 | 25 | 27 | 24 | 23 | 24 | 24 |
Feels °C | 23 | 26 | 27 | 25 | 26 | 24 | 23 | 28 | 30 | 27 | 31 | 31 | 29 | 28 | 29 | 25 | 26 | 27 | 27 |
Swell 1 Height (m) Direction Period (s) | SSW 10 | S 9 | SSW 9 | ESE 7 | ESE 9 | ESE 10 | ESE 11 | SE 10 | SE 10 | SE 10 | SE 10 | SE 9 | SE 9 | SE 8 | SSE 9 | SSE 9 | SSE 9 | SSE 9 | SSE 8 |
| kJ | 201 | 169 | 106 | 121 | 513 | 951 | 990 | 653 | 469 | 484 | 262 | 217 | 194 | 153 | 292 | 490 | 435 | 502 | 284 |
Swell 2 Height (m) Direction Period (s) | SSE 8 | ESE 7 | ESE 7 | SSW 8 | SW 9 | SSW 9 | SSE 11 | E 9 | S 11 | S 10 | S 10 | S 10 | S 10 | S 9 | E 18 | E 16 | E 16 | E 15 | E 15 |
| kJ | 44 | 25 | 38 | 57 | 19 | 8 | 940 | 220 | 9 | 106 | 141 | 171 | 161 | 136 | 6 | 5 | 5 | 4 | 17 |
Swell 3 Height (m) Direction Period (s) | ESE 6 | SE 9 | SE 9 | — | — | SSE 10 | — | — | S 11 | E 9 | SE 12 | ENE 9 | E 9 | E 18 | — | — | — | E 17 | — |
| kJ | 20 | 12 | 13 | — | — | 10 | — | — | 21 | 55 | 38 | 17 | 14 | 6 | — | — | — | 6 | — |
Wind waves Height (m) Direction Period (s) | NE 4 | NE 4 | NE 4 | NE 3 | NE 4 | NE 4 | NNE 4 | NNE 5 | NNE 6 | NNE 5 | NE 5 | NE 4 | NE 4 | NE 4 | NE 4 | NNE 4 | NNE 5 | NNE 4 | NNE 5 |
| kJ | 20 | 12 | 7 | 2 | 6 | 15 | 46 | 117 | 119 | 36 | 39 | 32 | 9 | 7 | 21 | 29 | 46 | 16 | 9 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 8 | 14 | 8 | 14 | 14 | 30 | 14 | 30 | 47 | 0 | 30 | 30 | 8 | 8 | 30 | 30 | 8 | 8 | 0 |
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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