Surf Forecasts:
Ikumi Beach surf forecast from 22 Aug 2026:
- Best quality surf: Tuesday 25 Aug, 12AM (local time) - 10ft (3.0m), 16s period, SSE swell with glassy winds.
- Most powerful swell: Tuesday 25 Aug, 3PM (local time) - 11ft (3.5m), 15s period, SSE swell with 6,366 kJ wave energy.
- Next surfable swell (1★+): Sunday 23 Aug, 3AM (local time) - 2ft (0.6m), 8s period with SSW 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 (Aug 23) at 3AM. The primary swell is predicted to be 0.6m and 8s period with a secondary swell of 0.4m and 10s. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Ikumi Beach in the next 16 days are 3.5m 15s and forecast to arrive on Tuesday (Aug 25) at 3PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 8s period and expected on Monday (Aug 24) at 3AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3AM (Sun 23rd Aug) | 2ft (0.6m) 8s |
| Best Surf | 12AM (Tue 25th Aug) | 10ft (3.0m) 16s |
| Most Powerful | 3PM (Tue 25th Aug) | 11ft (3.5m) 15s |
Table - best surf conditions forecast for Ikumi Beach over the next 16 days.
The Lowdown
Alright, let’s break it down for those who think in feet and miles per hour.
Ikumi Beach – Water temp’s about normal for this time of year. First few days are a bust. Sunday morning we’ve got a weak 2 ft swell from the SSW, period a measly 8 seconds, combined energy just 95 (weak). Wind’s light outta the SE at 3 mph, glassy – but there’s no push. Afternoon gets worse – 1 ft and messy.
Monday 24 August morning – now we’re talkin’. A clean 4 ft swell from the SE, a 16-second period – that’s groundswell, baby. Combined energy at 806 (moderate), and the wind is glassy at 3 mph. This is a standout. Early session, clean long lines. Afternoon goes downhill with storms.
Tuesday 25 August – huge. 12 ft from the SSE, 15-second period, energy 5833 (strong). Wind offshore at 3 mph – perfect conditions, but the swell is way too big for this break. Experts only, if at all.
Wednesday 26 August – still big. 10 ft in the morning, energy 3632, but wind’s cross-on. Too big and messy for most.
Thursday 27 August morning – back to a manageable 6 ft from the SSE, period 9 seconds, energy 829 (moderate), and glassy conditions. Good for intermediates. Afternoon gets cross-onshore.
Friday 28 August morning – another good window. 7 ft from the S, period 10 seconds, energy 881, and glassy. Solid fun. Afternoon gets bumpy.
Saturday 29 August morning – 6 ft from the ESE, but a short 7-second period. Glassy winds but weak energy.
Then a lull from Sunday 30 August through Tuesday 1 September – small swells, poor winds. Not worth it.
Wednesday 2 September – 5 ft but 20 mph cross-winds. Choppy. Afternoon gets worse. Better for kiteboarding.
Thursday 3 September morning – standout for experts. 8 ft from the SE, a whopping 17-second period, energy 3639 (strong). Wind is cross at 15 mph, but that long period pushes through. Get out early.
Friday 4 September – trash. Heavy rain, 30 mph winds, big lumpy swell.
Saturday 5 September through Monday 7 September – onshore winds, rain, and swell that’s either too small or too big and messy. Not worth paddlin’ out.
Best calls: Monday 24 August morning, then Thursday 27 and Friday 28 August mornings for clean conditions. If you’re experienced, Thursday 3 September morning with that long period is a gem.
- Rusty
Short Range ForecastLight rain (total 2mm), mostly falling on Sat night. Warm (max 30°C on Sun morning, min 25°C on Sat night). Wind will be generally light. | Days 5-7 Weather SummaryLight rain (total 6mm), mostly falling on Tue night. Warm (max 30°C on Thu morning, min 26°C on Tue night). Wind will be generally light. | ||||||||||||||||||
Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | Friday 28 | ||||||||||||||
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 8 | SSW 8 | SE 13 | SE 12 | SE 16 | SE 16 | SSE 16 | SSE 15 | SSE 15 | SSE 14 | S 13 | S 13 | SSW 12 | SSE 9 | SSE 8 | SSE 9 | S 10 | SSE 10 | SSE 9 |
Wave Graph  | |||||||||||||||||||
 kJ | 55 | 54 | 45 | 152 | 793 | 1852 | 5089 | 5799 | 6366 | 4832 | 3389 | 1805 | 995 | 459 | 360 | 721 | 865 | 998 | 601 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | glassy | cross-on | cross-off | glassy | cross-on | glassy | on | on | glassy | cross-on | cross-on | glassy | glassy | cross-on | glassy | glassy | cross-on | cross-off |
High Tide | 00:11AM1.59m | 4:10PM1.59m | 2:01AM1.59m | 4:51PM1.70m | 3:24AM1.68m | 5:22PM1.79m | 4:22AM1.80m | 5:50PM1.85m | 5:10AM1.91m | 6:16PM1.90m | 5:52AM1.99m | 6:40PM1.94m | |||||||
Low Tide | 8:20AM0.60m | 9:07PM1.34m | 9:32AM0.51m | 10:12PM1.22m | 10:25AM0.41m | 10:53PM1.08m | 11:08AM0.34m | 11:28PM0.93m | 11:46AM0.31m | 00:00AM0.79m | 12:20PM0.32m | 00:32AM0.66m | |||||||
 |  | |  | |  | | | |  | | | |  | | | | |  | |
 | — | 5:30 | — | — | 5:30 | — | — | 5:31 | — | — | 5:31 | — | — | 5:31 | — | — | 5:33 | — | — |
 | 6:42 | — | 6:39 | — | — | 6:38 | — | — | 6:37 | — | — | 6:37 | — | — | 6:36 | — | — | 6:34 | — |
mm | 1 | — | — | — | — | 1 | — | — | — | 1 | 1 | 1 | — | — | — | 2 | — | 1 | — |
Temp °C | 26 | 30 | 30 | 26 | 30 | 29 | 26 | 30 | 30 | 26 | 29 | 29 | 27 | 30 | 30 | 26 | 30 | 29 | 26 |
Feels °C | 30 | 33 | 34 | 31 | 33 | 33 | 31 | 33 | 33 | 31 | 33 | 33 | 33 | 34 | 33 | 31 | 33 | 32 | 30 |
Swell 1 Height (m) Direction Period (s) | SSW 8 | SSW 8 | S 8 | SE 12 | SE 16 | SE 16 | SSE 16 | SSE 15 | SSE 15 | SSE 14 | S 13 | S 13 | SSW 12 | SSE 9 | SSE 8 | SSE 9 | S 10 | SSE 10 | SSE 9 |
| kJ | 55 | 54 | 30 | 152 | 793 | 1852 | 5089 | 5799 | 6366 | 4832 | 3389 | 1805 | 995 | 459 | 360 | 721 | 865 | 998 | 601 |
Swell 2 Height (m) Direction Period (s) | ESE 10 | ESE 11 | SE 13 | SSW 9 | SSW 8 | S 8 | E 11 | E 15 | E 14 | E 13 | E 13 | SE 9 | SE 9 | SSW 11 | SSW 9 | E 11 | E 10 | E 14 | SE 12 |
| kJ | 10 | 38 | 45 | 30 | 13 | 12 | 10 | 17 | 16 | 32 | 30 | 311 | 314 | 359 | 110 | 9 | 8 | 4 | 6 |
Swell 3 Height (m) Direction Period (s) | ESE 13 | ESE 6 | ESE 11 | S 8 | SW 8 | SSW 8 | SW 8 | E 15 | — | — | — | E 13 | E 12 | E 12 | SW 10 | SSW 10 | SE 14 | — | E 12 |
| kJ | 16 | 3 | 23 | 21 | 11 | 6 | 17 | 17 | — | — | — | 29 | 11 | 11 | 50 | 10 | 8 | — | 3 |
Wind waves Height (m) Direction Period (s) | SW 2 | — | — | — | — | — | — | — | — | — | SE 10 | — | — | — | — | — | — | ESE 6 | E 6 |
| kJ | 1 | — | — | — | — | — | — | — | — | — | 213 | — | — | — | — | — | — | 180 | 207 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 0 | 0 | 4 | 0 | 0 | 4 | 4 | 434 | 33 | 4 | 30 | 4 | 0 | 0 | 4 | 0 | 0 | 4 | 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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