
Surf Forecasts:
Ikumi Beach surf forecast from 30 Jul 2026:
- Best quality surf: Tuesday 4 Aug, 9AM (local time) - 10ft (3.0m), 17s period, ESE swell with onshore winds.
- Most powerful swell: Thursday 6 Aug, 3PM (local time) - 26ft (8.0m), 18s period, SE swell with 41,040 kJ wave energy.
- Next surfable swell (1★+): Thursday 30 Jul, 9PM (local time) - 1.5ft (0.4m), 10s period with SE 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 (Jul 30) at 9PM. The primary swell is predicted to be 0.4m and 10s period with a secondary swell of 0.3m and 7s. 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 8.0m 18s and forecast to arrive on Thursday (Aug 06) at 3PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 5s period and expected on Thursday (Jul 30) at 9PM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9PM (Thu 30th Jul) | 1.5ft (0.4m) 10s |
| Best Surf | 9AM (Tue 4th Aug) | 10ft (3.0m) 17s |
| Most Powerful | 3PM (Thu 6th Aug) | 26ft (8.0m) 18s |
Table - best surf conditions forecast for Ikumi Beach over the next 16 days.
The Lowdown
Alright folks, Rusty here with a look at the upcoming swell window for our patch.
First up, we've got a quiet start with some tiny, weak waves. The water is sitting at 83.1°, which is about a degree and a half warmer than usual for this time of year – a nice little bonus if you're just going for a splash. Thursday the 30th and Friday the 31st are mostly a write-off with tiny, gutless surf and poor conditions. Saturday the 1st of August is much the same, glassy but with hardly any energy to push a wave. It’s a bit of a flat spell to kick things off.
Now, things start to get interesting late on Sunday the 2nd. We see a pulse of swell arriving from the ESE, building through the day. Sunday morning looks promising with clean, glassy conditions and waist-high waves, the energy is moderate (287) but that long period of 14 seconds means proper ground swell. By Sunday afternoon that swell jumps up to a clean 3.3ft with a very long 16-second period, but it turns onshore, so the quality might get a bit iffy. Monday the 3rd sees the swell really ramp up, hitting 5.6ft in the morning and 6.9ft in the afternoon with a huge 17-second period. The wave energy is now very strong (2,385), but it stays onshore and the size is getting too much for the lineup here.
The real standout, and the best waves we’ll see for a while, is Tuesday the 4th of August. Morning brings a solid 9.8ft of ESE groundswell with that super long 17-second period and glassy conditions. The energy is massive (4,498!). But honestly, this is a beast. At 9.8ft, this is expert territory only – way too big for beginners and a serious handful for anyone else. The afternoon stays big but picks up an onshore breeze.
That massive swell continues to roar through Wednesday the 5th and Thursday the 6th with waves up to 26.2ft. The energy numbers are astronomically high (37,604 on Thursday morning), but it’s all cross-onshore and lumpy. This isn't a paddle situation; the setup here looks a lot more like a kite-surfing dream than a surfer’s paradise. It starts to ease a bit from Friday the 7th onward but stays big and messy, fully blown out by fresh winds.
After that wild week, the final few days from Sunday the 9th through to the end of the forecast see the swell drop back down to a more manageable 3.3ft to 8.2ft range. The period shortens up a bit, but we do get some clean, glassy windows. The morning of Tuesday the 11th of August is worth a mention with a clean 4.6ft S swell and glassy conditions. Also, keep an eye on the morning of Friday the 14th of August: a 4.3ft ESE swell with a nice 13-second period and glassy winds – that looks like another solid window for a session. It’s inconsistent and often crowded out here, but when it cleans up on those glassy mornings, it can be worth the paddle.
Stay safe out there.
Short Range ForecastMostly dry. Warm (max 32°C on Thu morning, min 28°C on Thu night). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 4mm), mostly falling on Tue morning. Warm (max 33°C on Sun morning, min 26°C on Tue night). Wind will be generally light. | ||||||||||||||||||||
Thursday 30 | Friday 31 | Saturday 1 | Sunday 2 | Monday 3 | Tuesday 4 | Wednesday 5 | |||||||||||||||
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) | SE 10 | SE 10 | SE 10 | SE 9 | SE 13 | SE 10 | SE 10 | SE 11 | SE 16 | ESE 18 | ESE 16 | ESE 15 | ESE 16 | ESE 17 | ESE 18 | ESE 17 | ESE 17 | ESE 17 | SE 17 | SE 18 | SE 18 |
Wave Graph | |||||||||||||||||||||
23 | 23 | 23 | 24 | 26 | 23 | 28 | 29 | 64 | 174 | 612 | 776 | 1608 | 2251 | 3777 | 4358 | 5406 | 8772 | 10814 | 17650 | 28080 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | glassy | glassy | cross-on | glassy | glassy | cross-on | off | glassy | on | cross-off | cross-on | on | cross-on | on | on | glassy | cross-on | cross-on | cross |
High Tide | 7:18PM1.91m | 6:39AM1.96m | 7:45PM1.91m | 7:20AM1.96m | 8:12PM1.90m | 8:02AM1.91m | 8:40PM1.88m | 8:45AM1.83m | 9:08PM1.85m | 9:33AM1.72m | 9:38PM1.80m | 10:30AM1.59m | 10:12PM1.75m | ||||||||
Low Tide | 12:39PM0.19m | 00:56AM0.86m | 1:15PM0.23m | 1:30AM0.78m | 1:49PM0.33m | 2:06AM0.71m | 2:22PM0.45m | 2:43AM0.66m | 2:55PM0.61m | 3:24AM0.63m | 3:29PM0.78m | 4:11AM0.63m | 4:06PM0.96m | ||||||||
5:13 | — | — | 5:13 | — | — | 5:13 | — | — | 5:15 | — | — | 5:15 | — | — | 5:16 | — | — | 5:16 | — | — | |
— | 7:05 | — | — | 7:04 | — | — | 7:02 | — | — | 7:01 | — | — | 7:00 | — | — | 7:00 | — | — | 7:00 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 2 | 2 | — | — | — | — |
Temp °C | 32 | 32 | 29 | 32 | 32 | 28 | 32 | 32 | 29 | 33 | 33 | 30 | 31 | 30 | 27 | 29 | 28 | 27 | 30 | 30 | 27 |
Feels °C | 35 | 36 | 34 | 35 | 36 | 33 | 35 | 36 | 33 | 37 | 37 | 35 | 35 | 34 | 33 | 34 | 33 | 32 | 32 | 33 | 30 |
Swell 1 Height (m) Direction Period (s) | SE 10 | SE 10 | SE 10 | SE 9 | SE 9 | SE 10 | SE 10 | SE 11 | SE 11 | ESE 18 | ESE 16 | ESE 15 | ESE 16 | ESE 17 | ESE 18 | ESE 17 | ESE 17 | ESE 17 | SE 17 | SE 18 | SE 18 |
23 | 23 | 23 | 23 | 23 | 23 | 28 | 29 | 41 | 174 | 612 | 776 | 1608 | 2251 | 3777 | 4358 | 5406 | 8772 | 10814 | 17650 | 28080 | |
Swell 2 Height (m) Direction Period (s) | SSW 5 | SSW 8 | SSW 5 | SSW 5 | SSW 4 | SE 11 | SSW 4 | ESE 17 | SE 16 | ESE 14 | SSW 8 | SE 10 | SE 13 | SSE 10 | ESE 6 | — | — | — | — | — | — |
4 | 6 | 5 | 4 | 2 | 20 | 2 | 28 | 64 | 120 | 7 | 15 | 7 | 18 | 49 | — | — | — | — | — | — | |
Swell 3 Height (m) Direction Period (s) | SSW 8 | SSW 4 | SSW 7 | SE 12 | SE 13 | SSW 5 | S 7 | S 4 | ESE 19 | SE 9 | SSW 8 | S 8 | SE 13 | SE 13 | — | — | — | — | — | — | — |
6 | 2 | 5 | 24 | 26 | 3 | 1 | 1 | 35 | 21 | 7 | 5 | 7 | 7 | — | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | — | SW 6 | — | — | — | — | — | ENE 3 | SW 5 | E 9 | NE 4 | — | — | ESE 5 | E 6 | ESE 5 | ESE 6 | — | — | — | — |
— | 13 | — | — | — | — | — | 1 | 3 | 60 | 6 | — | — | 37 | 64 | 32 | 46 | — | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 30 | 16 | 280 | 0 | 36 | 0 | 565 | 8 | 0 | 0 | 14 | 0 | 30 | 371 | 30 | 33 | 30 | 4 | 30 | 471 | 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.










