
Surf Forecasts:
Ikumi Beach surf forecast from 17 Jul 2026:
- Best quality surf: Sunday 19 Jul, 3AM (local time) - 1.5ft (0.4m), 10s period, ESE swell with glassy winds.
- Most powerful swell: Friday 24 Jul, 12AM (local time) - 1ft (0.3m), 18s period, SE swell with 50 kJ wave energy.
- Next surfable swell (1★+): Sunday 19 Jul, 3AM (local time) - 1.5ft (0.4m), 10s period with ESE 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 (Jul 19) at 3AM. The primary swell is predicted to be 0.4m and 10s period with a secondary swell of 0.4m and 8s. Another secondary swell of 0.2m and 3s is also forecast. 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 0.3m 18s and forecast to arrive on Friday (Jul 24) at 12AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 7s period and expected on Friday (Jul 17) at 3PM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3AM (Sun 19th Jul) | 1.5ft (0.4m) 10s |
| Best Surf | 3AM (Sun 19th Jul) | 1.5ft (0.4m) 10s |
| Most Powerful | 12AM (Fri 24th Jul) | 1ft (0.3m) 18s |
Table - best surf conditions forecast for Ikumi Beach over the next 16 days.
The Lowdown
Alright, Rusty here. Let’s break down the next sixteen days for Ikumi Beach.
The first bit is a total dud. For about a week and a half, we’ve got nothing worth paddling out for. The swell is tiny, only 1ft to 1ft, with a combined swell energy that’s weak (26 to 49). The wind goes glassy at times, but the waves are just too small and ordinary. It’s a long, flat gap right through until the morning of Sunday, July 26th.
The first real sniff of surf comes on the 26th. The morning of Sunday, July 26th sees a 4ft swell from the SE with a long 14-second period, and a moderate energy of 439. The wind is offshore (E) and glassy, so the surface will be clean. It’s a groundswell, so it’ll have some shape, but at a beach break, the long period can make it a bit straight. For a beginner spot, it’s doable. The afternoon swell jumps to 5ft with a 12-second period and energy of 621, but the wind goes cross-onshore, so it’ll get messy. It’s the best of a weak bunch, but still only marginal.
Now for the big one – Monday, July 27th. The swell goes off, hitting 12ft from the SSE with a 14-second period. The combined energy is a massive 6440, which is strong. The wind is offshore from the E in the morning, glassy. But at 12ft, this is way too big for beginners. This is only for experts. The long period groundswell would be better at a reef or point, but here at Ikumi Beach, it’s going to be a huge, chaotic mess. The afternoon is 13ft with cross-onshore winds, even worse. Honestly, with that size and wind, it’s more of a kite-surfing deal than a paddle session.
The swell stays huge through the 28th and 29th of July, with 13ft to 15ft from the S and SSE, all with very strong energy (6990 to 8550). The winds are mostly cross-onshore or cross, so it’s sloppy and massive. Only the most experienced should even think about it. Thursday, July 30th, offers a bit of a cleaner situation with a 13ft to 15ft swell from the S and SSW, and a clean cross-offshore wind from the SW. That’s better, but the size is still only for experts. The period drops to 10 seconds, so it’s less of a groundswell.
By Friday, July 31st, it drops to 8ft in the morning from the SSW with a short 8-second period and energy of 1230. The wind is cross, so it’ll be choppy. The afternoon has 5ft and 306 energy, but it’s marginal. Then it fades into the first of August with tiny, poor surf.
So, to sum it up: If you’re a beginner, your best bet is the morning of Sunday, July 26th – 4ft, clean, but not great. For experts, the big action is Monday through Wednesday, July 27th to 29th, with massive, powerful swell, but it’s not clean. The cleanest big swell is Thursday, July 30th, but it’s still only for the brave. The water temperature is 81°F, which is about average for this time of year.
Rusty.
Short Range ForecastMostly dry. Warm (max 31°C on Fri morning, min 25°C on Sun night). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 8mm), mostly falling on Tue afternoon. Warm (max 31°C on Mon morning, min 26°C on Mon night). Wind will be generally light. | ||||||||||||||||||||
Friday 17 | Saturday 18 | Sunday 19 | Monday 20 | Tuesday 21 | Wednesday 22 | Thursday 23 | |||||||||||||||
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) | ESE 10 | ESE 9 | SE 10 | ESE 9 | E 9 | SE 8 | ESE 9 | ESE 9 | SE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 11 | ESE 11 | ESE 11 | ESE 11 | ESE 11 | ESE 10 | SE 10 | SE 10 | SE 18 |
Wave Graph | |||||||||||||||||||||
18 | 16 | 14 | 15 | 13 | 24 | 17 | 17 | 20 | 27 | 27 | 16 | 39 | 23 | 22 | 22 | 22 | 11 | 28 | 25 | 50 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | glassy | glassy | on | cross-on | glassy | cross-on | cross-on | cross-off | cross | cross | cross-off | glassy | cross | off | glassy | on | cross-off | glassy | glassy | cross-off |
High Tide | 8:17PM1.87m | 7:45AM1.88m | 8:47PM1.85m | 8:29AM1.81m | 9:18PM1.81m | 9:18AM1.72m | 9:50PM1.78m | 10:13AM1.61m | 10:24PM1.73m | 11:23AM1.50m | 11:05PM1.69m | 12:59PM1.44m | 11:56PM1.65m | ||||||||
Low Tide | 1:41PM0.22m | 2:00AM0.83m | 2:17PM0.33m | 2:38AM0.78m | 2:53PM0.47m | 3:20AM0.74m | 3:30PM0.64m | 4:08AM0.71m | 4:09PM0.81m | 5:03AM0.69m | 4:54PM0.99m | 6:11AM0.66m | 5:55PM1.16m | ||||||||
5:03 | — | — | 5:05 | — | — | 5:05 | — | — | 5:05 | — | — | 5:07 | — | — | 5:07 | — | — | 5:07 | — | — | |
— | 7:13 | — | — | 7:12 | — | — | 7:12 | — | — | 7:10 | — | — | 7:10 | — | — | 7:09 | — | — | 7:08 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 4 | 1 | — | 2 | — | — | 1 | — |
Temp °C | 31 | 30 | 28 | 30 | 30 | 27 | 29 | 29 | 26 | 31 | 30 | 27 | 29 | 30 | 27 | 31 | 30 | 28 | 31 | 30 | 28 |
Feels °C | 34 | 34 | 34 | 34 | 35 | 33 | 34 | 33 | 31 | 34 | 34 | 32 | 34 | 35 | 32 | 36 | 35 | 33 | 35 | 35 | 33 |
Swell 1 Height (m) Direction Period (s) | SSW 7 | SW 7 | SE 10 | ESE 9 | SE 8 | SE 8 | SE 5 | SE 4 | SE 4 | ESE 9 | ESE 9 | ESE 9 | ESE 11 | ESE 11 | ESE 11 | ESE 11 | ESE 11 | SE 11 | SE 10 | SE 10 | SE 10 |
18 | 11 | 14 | 15 | 11 | 24 | 5 | 5 | 4 | 27 | 27 | 16 | 39 | 23 | 22 | 22 | 22 | 4 | 28 | 25 | 16 | |
Swell 2 Height (m) Direction Period (s) | ESE 10 | ESE 9 | E 9 | SE 9 | E 9 | ESE 3 | SE 8 | ESE 9 | ESE 9 | SSE 4 | SSE 8 | SSE 4 | SSE 8 | SSE 8 | SE 8 | SSE 8 | SSE 8 | SSE 7 | SE 20 | SE 19 | SSE 8 |
18 | 16 | 14 | 13 | 13 | 1 | 10 | 17 | 16 | 3 | 7 | 3 | 7 | 6 | 10 | 6 | 6 | 5 | 15 | 15 | 7 | |
Swell 3 Height (m) Direction Period (s) | SSW 8 | S 8 | SSW 7 | SSW 7 | SSW 6 | E 9 | ESE 9 | SE 8 | SE 9 | SSE 9 | ESE 12 | SSE 8 | SSE 4 | SE 6 | S 3 | SW 7 | S 7 | ESE 10 | S 8 | S 8 | SE 18 |
12 | 10 | 11 | 4 | 4 | 7 | 17 | 9 | 20 | 7 | 13 | 7 | 1 | 2 | 1 | 2 | 1 | 11 | 5 | 5 | 50 | |
Wind waves Height (m) Direction Period (s) | — | — | — | ESE 3 | — | SE 3 | — | SSW 7 | SSE 4 | SSW 4 | S 4 | SSW 4 | — | — | SSW 3 | — | ENE 3 | — | NNE 3 | — | WSW 2 |
— | — | — | 2 | — | 1 | — | 9 | 5 | 3 | 2 | 4 | — | — | 1 | — | 1 | — | 1 | — | 1 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 338 | 30 | 30 | 381 | 16 | 16 | 16 | 0 | 16 | 518 | 16 | 0 | 16 | 276 | 16 | 445 | 276 | 0 | 0 | 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.










