Surf Forecasts:
Ikumi Beach surf forecast from 28 Aug 2026:
- Best quality surf: Sunday 30 Aug, 6AM (local time) - 3.5ft (1.0m), 8s period, SSW swell with offshore winds.
- Most powerful swell: Wednesday 2 Sep, 9AM (local time) - 7ft (2.2m), 10s period, SSE swell with 1,092 kJ wave energy.
- Next surfable swell (1★+): Saturday 29 Aug, 6AM (local time) - 2.5ft (0.8m), 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 Saturday (Aug 29) at 6AM. The primary swell is predicted to be 0.8m and 8s period with a secondary swell of 0.3m and 9s. 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 2.2m 10s and forecast to arrive on Wednesday (Sep 02) at 9AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 4s period and expected on Saturday (Aug 29) at 6AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6AM (Sat 29th Aug) | 2.5ft (0.8m) 8s |
| Best Surf | 6AM (Sun 30th Aug) | 3.5ft (1.0m) 8s |
| Most Powerful | 9AM (Wed 2nd Sep) | 7ft (2.2m) 10s |
Table - best surf conditions forecast for Ikumi Beach over the next 16 days.
The Lowdown
Alright folks, it's Rusty here. Let's talk about what's on offer at Ikumi Beach over the next couple of weeks.
Right off the bat, we've got a bit of a slow start. The first few days are pretty ordinary, with only small, weak swells and a lot of cross-off or cross-onshore breeze messing things up. From Saturday the 29th through Monday the 31st of August, it’s mostly just small, junky waves. The energy is low, so those waves won't have any push. It's not really worth paddling out unless you're desperate to get wet.
Things start to get a bit more interesting around Tuesday the 2nd of September. The swell jumps up to around 7ft from the SSE, with a solid chunk of energy. That's a proper pulse of power. But, the wind is cross-onshore, and the quality is described as marginal, so it's going to be a bit of a messy, choppy session. Not the clean conditions we chase for a standout day.
Now, if you can hold out, we've got a couple of windows that look really promising. Saturday the 5th of September morning is a solid shout. We’re looking at a 5ft swell from the SE with a clean, cross-off breeze from the SW. The conditions are set to be "very good," and it’s clean. That is your first real highlight.
But the true standout of this whole outlook is Friday the 11th of September, the morning session. This is where it gets exciting. The swell is 5ft from the ESE, with a very long period of 12 seconds – that’s proper groundswell energy. The wind is glassy from the NE, and the forecast is "very good." With that long period and glassy surface, this spot will be a dream. Because it’s so far out, treat this as a promising forecast, but it has all the ingredients for a magic session.
A couple of other morning windows worth a look: Sunday the 6th and Thursday the 10th of September mornings also have clean, cross-off winds and decent 5ft swell from the SE or ESE, but they don’t have that extra special long-period punch. Also, a glassy window pops up again on Saturday the 12th of September morning, but the swell has dropped off to 3ft.
Overall, there are good waves scattered through the period. The first week is mostly a write-off for quality, but the second week has the real gold, especially that Friday the 11th. The water temperature is sitting around average for the time of year, so nothing out of the ordinary there. Keep your eyes on that glassy morning on the 11th.
Stay stoked, catch you in the water.
Rusty.
Short Range ForecastLight rain (total 3mm), mostly falling on Sat afternoon. Warm (max 31°C on Sat morning, min 26°C on Fri night). Wind will be generally light. | Days 5-7 Weather SummaryHeavy rain (total 56mm), heaviest during Thu afternoon. Warm (max 28°C on Tue morning, min 25°C on Mon night). Wind will be generally light. | ||||||||||||||||||
Saturday 29 | Sunday 30 | Monday 31 | Tuesday 1 | Wednesday 2 | Thursday 3 | ||||||||||||||
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 | SSW 8 | SSW 8 | SSW 8 | S 7 | SE 10 | S 8 | S 9 | S 10 | S 9 | S 9 | S 9 | SSE 10 | SSE 10 | SSE 10 | S 11 | S 10 | S 10 |
Wave Graph  | |||||||||||||||||||
 kJ | 73 | 75 | 128 | 75 | 88 | 39 | 37 | 71 | 78 | 184 | 194 | 188 | 270 | 1092 | 763 | 625 | 734 | 452 | 325 |
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 | cross-on | glassy | on | on | on | cross-on | cross-on | cross-on | cross-on | cross | cross |
High Tide | 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 | 10:06AM1.62m | 9:18PM1.78m | |||||||
Low Tide | 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 | 3:32AM0.50m | 3:25PM1.07m | |||||||
 |  |  | |  | | |  | |  | | |  | | | | |  | | |
 | — | 5:33 | — | — | 5:33 | — | — | 5:35 | — | — | 5:35 | — | — | 5:35 | — | — | 5:37 | — | — |
 | 6:34 | — | 6:32 | — | — | 6:31 | — | — | 6:30 | — | — | 6:29 | — | — | 6:28 | — | — | 6:25 | — |
mm | — | — | 1 | — | 1 | 1 | — | — | — | 1 | 5 | 4 | 15 | 3 | 2 | 11 | 5 | 10 | 33 |
Temp °C | 27 | 31 | 31 | 26 | 30 | 30 | 27 | 30 | 30 | 26 | 28 | 28 | 26 | 28 | 28 | 26 | 27 | 27 | 27 |
Feels °C | 32 | 33 | 34 | 30 | 35 | 34 | 32 | 32 | 33 | 32 | 32 | 32 | 31 | 30 | 31 | 30 | 30 | 30 | 30 |
Swell 1 Height (m) Direction Period (s) | SSE 7 | SSW 8 | ESE 9 | SE 11 | S 7 | S 7 | S 7 | S 8 | S 9 | S 10 | S 9 | S 9 | S 9 | SSE 10 | SSW 12 | SSE 10 | S 11 | S 10 | S 10 |
| kJ | 21 | 75 | 8 | 19 | 54 | 39 | 25 | 71 | 78 | 184 | 194 | 188 | 270 | 836 | 283 | 625 | 734 | 452 | 325 |
Swell 2 Height (m) Direction Period (s) | SSE 9 | SE 10 | SSE 9 | ESE 9 | SE 10 | SE 10 | SE 10 | SE 10 | SE 10 | SE 10 | ESE 13 | ESE 12 | E 12 | E 11 | ESE 11 | SSW 12 | ESE 10 | ESE 9 | SSW 12 |
| kJ | 9 | 14 | 8 | 8 | 27 | 36 | 37 | 25 | 25 | 23 | 58 | 50 | 67 | 61 | 37 | 161 | 20 | 144 | 125 |
Swell 3 Height (m) Direction Period (s) | ESE 8 | E 10 | SE 13 | SSE 9 | ESE 10 | SW 11 | SW 9 | S 14 | S 12 | ESE 14 | SE 9 | SE 9 | SE 9 | SSW 14 | SE 11 | ESE 11 | ESE 8 | E 10 | S 13 |
| kJ | 7 | 7 | 7 | 8 | 9 | 4 | 3 | 4 | 27 | 40 | 22 | 22 | 14 | 79 | 18 | 38 | 13 | 8 | 125 |
Wind waves Height (m) Direction Period (s) | SSW 8 | SW 5 | SSW 8 | SSW 8 | SSW 8 | SSW 4 | SW 3 | — | — | — | ESE 4 | ESE 5 | ESE 5 | SSE 10 | SSE 10 | E 5 | — | — | ESE 8 |
| kJ | 73 | 33 | 128 | 75 | 88 | 9 | 2 | — | — | — | 11 | 39 | 36 | 1092 | 763 | 30 | — | — | 222 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 4 | 4 | 0 | 30 | 593 | 30 | 4 | 381 | 4 | 393 | 382 | 382 |
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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