Surf Forecasts:
Ikumi Beach surf forecast from 27 Aug 2026:
- Best quality surf: Thursday 3 Sep, 3PM (local time) - 7.5ft (2.3m), 9s period, SE swell with cross-offshore winds.
- Most powerful swell: Thursday 3 Sep, 12AM (local time) - 8ft (2.5m), 10s period, SSE swell with 1,433 kJ wave energy.
- Next surfable swell (1★+): Thursday 27 Aug, 6PM (local time) - 5ft (1.5m), 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 Thursday (Aug 27) at 6PM. The primary swell is predicted to be 1.5m and 9s period with a secondary swell of 0.2m and 11s. Another secondary swell of 0.1m and 10s 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 Thursday (Sep 03) at 12AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.8m 4s period and expected on Saturday (Aug 29) at 6PM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6PM (Thu 27th Aug) | 5ft (1.5m) 9s |
| Best Surf | 3PM (Thu 3rd Sep) | 7.5ft (2.3m) 9s |
| Most Powerful | 12AM (Thu 3rd Sep) | 8ft (2.5m) 10s |
Table - best surf conditions forecast for Ikumi Beach over the next 16 days.
The Lowdown
G'day, I'm Rusty, and I'm gonna walk you through the next 16 days of surf for Ikumi Beach. The water temp is sitting at 84°, which is a touch warmer than normal for this time of year, so you might not need a full steamer.
Okay, the first bit of action is a bit of a slow starter. Thursday morning, the 27th of August, is our opening act. We've got a 5ft SSW swell with a 10-second period and a combined energy of 752 (moderate). The wind is a cross-off from the SW at 9 mph, which is keeping things clean. It's a beginner break, but it's inconsistent, and crowds are often here. This is a solid, clean session to get your feet wet.
Friday morning, the 28th, the swell drops to 3ft, but it's still clean with a light cross-off. The afternoon turns glassy with a tiny 2ft swell, but it's pretty ordinary. The weekend is a bit of a write-off with small, weak swells and mostly cross-off winds. The energy drops to as low as 70 (weak) on Saturday afternoon.
Now, Monday morning, the 31st of August, is a real hidden gem. The wind is glassy from the E at 3 mph, with a 4ft SSE swell and a 10-second period. The combined energy is 251 (moderate), and the forecast says "expect good surf conditions." This is a standout for a clean, fun session with no crowds likely in the early morning.
The first week of September starts to get messy. Tuesday, the 1st, has onshore wind and rain, with the swell building to 6ft but poor conditions. Wednesday, the 2nd, gets ugly with an 8ft SSE swell, a fresh cross-onshore wind at 19 mph, and a combined energy of 2329 (strong). This is raw, lumpy, and better suited for experienced surfers if they're brave, but honestly, it looks more like a day for kite surfing than paddle surfing.
The surf starts to clean up again on Thursday afternoon, the 3rd of September. We get a 8ft SE swell with a cross-off wind from the SW at 9 mph, and the energy is 1088 (strong). The forecast calls it "excellent surf conditions for experienced surfers." This is the best swell size of the run so far, and the clean conditions make it a real standout for the more skilled crew.
Friday and Saturday, the 4th and 5th, are a bit mixed with cross-shore winds and marginal conditions. The swell hangs around 7ft to 8ft, but the chop is a factor.
Sunday morning, the 6th of September, is another excellent session. A 7ft SE swell with a 10-second period, light cross-off wind from the N at 6 mph, and a combined energy of 1230 (strong). The conditions are clean. This is a solid, powerful option for experienced surfers.
Monday morning, the 7th, turns glassy again with a 6ft SSE swell, but the period drops to 8 seconds. It's clean and fun, but the energy is moderate at 620.
The second week is a bit of a rollercoaster. Tuesday, the 8th, sees a massive 12ft SSE swell with a combined energy of 2779 (very strong), but it's a cross-onshore mess. The afternoon is even bigger at 10ft, and it's just too big and choppy for this break. Wednesday, the 9th, is smaller but windy and messy.
Thursday, the 10th, offers a promising 7ft E swell with a light cross-onshore wind and a combined energy of 1285 (strong). The period is 10 seconds, and the conditions are marginal but workable for experienced surfers.
The forecast ends on Friday, the 11th, with a tiny 4ft swell and a glassy morning, but it's short period and weak.
Overall, the standout sessions are Monday morning, the 31st of August, for a clean, fun beginner-to-intermediate session, and Thursday afternoon, the 3rd of September, plus Sunday morning, the 6th, for the experienced crew looking for size and clean conditions. The rest is a mixed bag of small, messy, or too big.
Rusty out.
Short Range ForecastLight rain (total 6mm), mostly falling on Fri afternoon. Warm (max 32°C on Fri morning, min 25°C on Fri night). Wind will be generally light. | Days 4-6 Weather SummaryHeavy rain (total 62mm), heaviest during Tue night. Warm (max 31°C on Sun morning, min 24°C on Sun night). Winds increasing (calm on Sun morning, fresh winds from the SSE by Tue night). | ||||||||||||||||||||
Thursday 27 | Friday 28 | Saturday 29 | Sunday 30 | Monday 31 | Tuesday 1 | Wednesday 2 | |||||||||||||||
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) | SSW 10 | SSE 10 | S 9 | SSW 8 | SSW 8 | SSW 8 | SSW 7 | SSW 4 | S 7 | SSW 7 | SSW 7 | S 12 | SSE 10 | SSE 11 | SSE 10 | SSE 10 | SSE 9 | SSE 10 | SSE 10 | SSE 10 | SSE 10 |
Wave Graph | |||||||||||||||||||||
371 | 218 | 203 | 87 | 63 | 50 | 73 | 38 | 54 | 76 | 71 | 71 | 250 | 286 | 446 | 540 | 739 | 832 | 1130 | 1306 | 1433 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross-off | cross-off | glassy | cross-off | cross-off | cross-off | cross-off | glassy | cross | cross-off | glassy | on | on | on | on | cross-on | cross-on | cross-on | cross-on |
High Tide | 6:16PM1.90m | 5:52AM1.99m | 6:40PM1.94m | 6:31AM2.03m | 7:05PM1.95m | 7:10AM2.03m | 7:30PM1.95m | 7:49AM1.98m | 7:55PM1.93m | 8:29AM1.89m | 8:20PM1.90m | 9:13AM1.77m | 8:48PM1.85m | ||||||||
Low Tide | 11:46AM0.31m | 00:00AM0.79m | 12:20PM0.32m | 00:32AM0.66m | 12:52PM0.37m | 1:04AM0.56m | 1:23PM0.47m | 1:36AM0.48m | 1:53PM0.59m | 2:11AM0.45m | 2:23PM0.74m | 2:49AM0.46m | 2:53PM0.90m | ||||||||
5:31 | — | — | 5:33 | — | — | 5:33 | — | — | 5:33 | — | — | 5:35 | — | — | 5:35 | — | — | 5:35 | — | — | |
— | 6:36 | — | — | 6:34 | — | — | 6:32 | — | — | 6:31 | — | — | 6:30 | — | — | 6:29 | — | — | 6:28 | — | |
mm | — | — | — | — | 5 | 1 | — | — | — | — | — | — | — | — | 16 | 7 | 14 | 25 | 12 | 13 | 26 |
Temp °C | 31 | 31 | 27 | 32 | 30 | 26 | 31 | 30 | 26 | 31 | 30 | 26 | 29 | 29 | 26 | 27 | 27 | 27 | 27 | 27 | 27 |
Feels °C | 34 | 34 | 32 | 35 | 35 | 32 | 33 | 33 | 30 | 34 | 33 | 30 | 32 | 32 | 30 | 29 | 29 | 29 | 28 | 28 | 28 |
Swell 1 Height (m) Direction Period (s) | SSE 9 | SSE 10 | S 9 | SSE 8 | SSW 8 | SSW 8 | SE 10 | SSE 9 | S 7 | S 7 | SE 10 | S 12 | SSE 10 | SSE 11 | SSE 10 | SSE 10 | ESE 12 | SSE 10 | SSE 10 | SSE 10 | SSE 10 |
202 | 218 | 203 | 78 | 63 | 50 | 14 | 8 | 54 | 52 | 37 | 71 | 250 | 286 | 446 | 540 | 29 | 832 | 892 | 990 | 850 | |
Swell 2 Height (m) Direction Period (s) | SSW 10 | E 11 | S 8 | SE 10 | SSE 8 | SSE 7 | E 10 | ESE 9 | SE 11 | SE 10 | SE 7 | SE 10 | S 8 | SSW 9 | SSW 9 | E 13 | E 12 | ESE 11 | ESE 11 | E 10 | SSW 11 |
154 | 10 | 12 | 15 | 62 | 31 | 7 | 17 | 19 | 27 | 2 | 39 | 1 | 8 | 7 | 30 | 72 | 43 | 37 | 33 | 214 | |
Swell 3 Height (m) Direction Period (s) | SSE 11 | SE 16 | E 11 | ESE 11 | SSE 10 | SSE 9 | SSE 13 | SE 13 | ESE 9 | ESE 10 | SW 11 | SW 9 | SW 8 | E 14 | E 13 | — | — | — | — | — | ESE 11 |
25 | 10 | 9 | 23 | 10 | 9 | 17 | 7 | 8 | 9 | 4 | 3 | 3 | 4 | 14 | — | — | — | — | — | 37 | |
Wind waves Height (m) Direction Period (s) | SSW 10 | SSW 9 | SSW 9 | SSW 8 | SW 8 | N 3 | SSW 7 | SSW 4 | SW 4 | SSW 7 | SSW 7 | S 7 | — | — | — | — | SSE 9 | — | SSE 10 | SSE 10 | SSE 10 |
371 | 207 | 52 | 87 | 50 | 1 | 73 | 38 | 21 | 76 | 71 | 39 | — | — | — | — | 739 | — | 1130 | 1306 | 1433 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 4 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 16 | 0 | 0 | 30 | 47 | 507 | 486 | 393 | 393 | 393 | 732 |
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.











