Surf Forecasts:
Ikumi Beach surf forecast from 2 Sep 2026:
- Best quality surf: Sunday 6 Sep, 3PM (local time) - 13ft (4.0m), 10s period, E swell with cross-onshore winds.
- Most powerful swell: Wednesday 9 Sep, 9AM (local time) - 13ft (4.0m), 10s period, SSE swell with 3,251 kJ wave energy.
- Next surfable swell (1★+): Thursday 3 Sep, 9AM (local time) - 3.5ft (1.1m), 8s period with SSE 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 Thursday (Sep 03) at 9AM. The primary swell is predicted to be 1.1m and 8s period with a secondary swell of 0.4m and 10s. 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 4.0m 10s and forecast to arrive on Wednesday (Sep 09) at 9AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.6m 4s period and expected on Tuesday (Sep 08) at 6PM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9AM (Thu 3rd Sep) | 3.5ft (1.1m) 8s |
| Best Surf | 3PM (Sun 6th Sep) | 13ft (4.0m) 10s |
| Most Powerful | 9AM (Wed 9th Sep) | 13ft (4.0m) 10s |
Table - best surf conditions forecast for Ikumi Beach over the next 16 days.
The Lowdown
Alright, Rusty here, let's chat about what's on the cards for Ikumi Beach.
Gonna be honest, this forecast is a mixed bag with a couple of real gems tucked in there if you're patient. The water's sitting at 85°F which feels a touch warmer than normal for this time of year.
We kick off the period with the best chance you'll see for a while: Thursday morning, September 3rd. It's glassy with a light NNW breeze, and a clean 4 ft swell rolling in from the SSE. The wave energy is moderate (206), and with such light wind, it'll be worth a paddle out despite the break being inconsistent. The afternoon holds more of the same with a slightly bigger 4 ft SSE swell and glassy conditions again. This is your window.
After that, things get messy. Friday and Saturday are a write-off with crappy cross-shore winds and poor surf conditions. We then see a big jump in size on Sunday the 6th, but it's a trap for beginners. The morning is 6 ft but with poor conditions, and the afternoon blows up to a huge 13 ft with a massive wave energy reading (3893). That kind of size is for experts only, and the onshore wind will chop it up anyway.
The next real standout is Tuesday, September 8th. The morning is still a bit rough, but by the afternoon we get a clean 8 ft SE groundswell. The period is a solid 10 seconds and the wind is light and offshore. With the wave energy at a strong 1060, this is excellent surf for experienced surfers. Just be aware it can get crowded here often.
Wednesday the 9th sees another huge pulse of swell, peaking at 13 ft in the morning and 12 ft in the afternoon. The energy readings are massive (3257 and 4198), but the wind is cross-onshore and messy. This is big, powerful, and ugly - honestly, for most, it's more of a kite-surfing setup than a paddle session.
The following week is pretty bleak. Thursday the 10th afternoon offers a brief moment of clean, glassy 4 ft surf, but it's inconsistent. After that, we're looking at a long stretch of poor conditions, onshore wind, and weak swell until Thursday the 17th. On the 17th, the morning brings a glassy 4 ft SE swell, but the energy is low (179) and the conditions are described as very ordinary.
The last few days of the forecast are flat and not worth the drive. So, your best bet is this Thursday morning and afternoon for clean, fun waves, or hold out for next Tuesday afternoon for some proper size if you've got the skills.
Rusty.
Short Range ForecastHeavy rain (total 88mm), heaviest during Fri afternoon. Warm (max 29°C on Thu afternoon, min 21°C on Fri afternoon). Wind will be generally light. | Days 4-6 Weather SummaryHeavy rain (total 89mm), heaviest during Tue afternoon. Warm (max 25°C on Mon morning, min 23°C on Sun afternoon). Wind will be generally light. | ||||||||||||||||||||
Thursday 3 | Friday 4 | Saturday 5 | Sunday 6 | Monday 7 | Tuesday 8 | Wednesday 9 | |||||||||||||||
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) | SSE 8 | SSE 10 | S 10 | S 10 | S 10 | S 9 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | E 10 | ESE 10 | ESE 8 | ESE 9 | SE 9 | SE 10 | SE 10 | SSE 10 | SSE 10 | S 10 | SE 9 |
Wave Graph  | |||||||||||||||||||||
 kJ | 157 | 294 | 450 | 434 | 377 | 152 | 72 | 87 | 163 | 482 | 2881 | 1023 | 346 | 245 | 437 | 681 | 1055 | 2018 | 3251 | 2420 | 528 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | glassy | glassy | cross | cross | cross | cross | cross-on | cross | cross | cross-on | cross | cross | cross-off | cross-off | cross | cross-off | cross | cross | cross-on | on |
High Tide | 10:06AM1.62m | 9:18PM1.78m | 11:21AM1.49m | 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 | ||||||||
Low Tide | 3:25PM1.07m | 4:25AM0.57m | 4:05PM1.22m | 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 | ||||||||
 | |  |  | |  |  | |  |  | | |  | | | | | | |  | | |
 | 5:37 | — | — | 5:37 | — | — | 5:37 | — | — | 5:39 | — | — | 5:39 | — | — | 5:39 | — | — | 5:41 | — | — |
 | — | 6:25 | — | — | 6:24 | — | — | 6:23 | — | — | 6:22 | — | — | 6:21 | — | — | 6:20 | — | — | 6:17 | — |
mm | 3 | 2 | 1 | 19 | 50 | 12 | — | — | 1 | 3 | 4 | 13 | 8 | 5 | 4 | 2 | 30 | 20 | 3 | — | 17 |
Temp °C | 28 | 29 | 26 | 24 | 22 | 22 | 27 | 28 | 24 | 24 | 24 | 24 | 25 | 24 | 23 | 25 | 24 | 25 | 27 | 27 | 27 |
Feels °C | 34 | 34 | 30 | 26 | 23 | 22 | 27 | 27 | 24 | 25 | 27 | 26 | 27 | 26 | 25 | 28 | 27 | 28 | 32 | 31 | 30 |
Swell 1 Height (m) Direction Period (s) | SSE 8 | SSE 10 | S 10 | S 10 | S 10 | S 9 | ESE 8 | ESE 8 | ESE 8 | SSW 9 | ESE 10 | ESE 10 | ESE 8 | ESE 9 | SE 9 | SE 10 | SE 10 | SSE 10 | E 18 | SSE 10 | SE 9 |
| kJ | 157 | 294 | 450 | 434 | 377 | 152 | 72 | 87 | 163 | 48 | 980 | 1023 | 346 | 245 | 437 | 681 | 1055 | 1602 | 6 | 1772 | 528 |
Swell 2 Height (m) Direction Period (s) | ESE 10 | ESE 10 | SE 10 | SE 9 | ESE 9 | E 7 | S 8 | S 8 | S 8 | — | SSW 9 | SSW 9 | SSW 10 | SSW 9 | S 11 | S 10 | — | — | — | E 18 | E 16 |
| kJ | 33 | 33 | 15 | 23 | 17 | 67 | 63 | 60 | 48 | — | 32 | 27 | 52 | 33 | 59 | 75 | — | — | — | 6 | 5 |
Swell 3 Height (m) Direction Period (s) | SE 10 | SE 10 | ESE 10 | E 9 | SE 9 | SE 9 | SW 9 | E 13 | SSW 11 | — | — | — | — | S 8 | SSW 9 | SSW 11 | — | — | — | — | E 16 |
| kJ | 16 | 15 | 18 | 16 | 14 | 12 | 21 | 3 | 12 | — | — | — | — | 5 | 8 | 12 | — | — | — | — | 21 |
Wind waves Height (m) Direction Period (s) | — | — | — | NNE 4 | NE 4 | N 3 | NNE 4 | NE 4 | NE 3 | ESE 8 | E 10 | NNE 4 | NNE 4 | NNE 5 | NNE 4 | NNE 4 | NE 3 | SSE 10 | SSE 10 | S 10 | NNE 3 |
| kJ | — | — | — | 19 | 31 | 5 | 13 | 20 | 3 | 482 | 2881 | 11 | 39 | 64 | 18 | 10 | 5 | 2018 | 3251 | 2420 | 3 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 30 | 30 | 8 | 30 | 30 | 30 | 30 | 30 | 8 | 30 | 30 | 0 | 8 | 0 | 30 | 10 | 14 | 47 |
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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