
Surf Forecasts:
Ikumi Beach surf forecast from 9 Jul 2026:
- Best quality surf: Thursday 9 Jul, 3PM (local time) - 10ft (3.0m), 15s period, SSE swell with cross-onshore winds.
- Most powerful swell: Saturday 11 Jul, 6AM (local time) - 13ft (4.0m), 18s period, S swell with 10,388 kJ wave energy.
- Next surfable swell (1★+): Thursday 9 Jul, 3PM (local time) - 10ft (3.0m), 15s period with SSE 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 09) at 3PM. The primary swell is predicted to be 3.0m and 15s period with a secondary swell of 0.6m and 8s. The wind is predicted to be cross-onshore as the swell arrives.
The most powerful waves expected at Ikumi Beach in the next 16 days are 4.0m 18s and forecast to arrive on Saturday (Jul 11) at 6AM. Winds are predicted to be glassy at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 14s period and expected on Monday (Jul 13) at 3AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3PM (Thu 9th Jul) | 10ft (3.0m) 15s |
| Best Surf | 3PM (Thu 9th Jul) | 10ft (3.0m) 15s |
| Most Powerful | 6AM (Sat 11th Jul) | 13ft (4.0m) 18s |
Table - best surf conditions forecast for Ikumi Beach over the next 16 days.
Alright folks, Rusty here. Let’s have a look at what’s coming up for Ikumi Beach over the next couple of weeks.
Right off the bat, we’ve got a bit of a wait. The first few days are all about building swell, but it’s just too much of a good thing. Thursday the 9th through Sunday the 12th is pumping, with swell heights climbing from 8 ft up to a solid 13 ft and the combined energy readings sitting in the thousands (3506 to 10208). That’s strong to very strong wave energy. The period is long, 15 to 18 seconds, which is proper groundswell. But for Ikumi Beach, it’s simply too big. The wind is mostly light and cross-onshore, so it’s not totally blown out, but the size means this is only for experts. The water temperature is 77°F, which is a bit colder than normal for this time of year.
The real standout comes on Sunday the 12th afternoon. The swell drops to a more manageable 8 ft from the SSW with a 14-second period, and the wind goes clean with a light cross-offshore breeze. The combined energy is still a solid 2325. This is the best bet for experienced surfers in the first week. Before that, Saturday the 11th morning has glassy conditions but 13 ft swell – that’s a big, powerful animal only for the brave.
After that, we get a nice reset. Monday the 13th morning is a gem: 5 ft of SSW swell, 12-second period, and the wind is glassy, completely calm. Combined energy is 694, which is moderate, but the quality is there. The water is still a bit colder than average. This is a great window for intermediate surfers. Monday afternoon and Tuesday the 14th morning stay small and glassy, with 4 ft and 3 ft respectively, but the energy drops off.
Then we hit a long, flat spell. From Tuesday the 14th afternoon all the way through Saturday the 18th, the swell dips below 3 ft, with pathetic energy readings (74 to 161). The wind is mostly onshore or cross-onshore. It’s a dead zone for surfing. A few days of nothing.
The next flicker of life comes on Sunday the 19th, with 6 ft ESE swell and a 13-second period, but the wind is onshore, so it’s marginal. The real return to form is Monday the 20th morning. The swell jumps to 8 ft from the SE, 14-second period, and it’s glassy. The energy is 2204, which is strong. This is excellent for experienced surfers. It gets bigger again Monday afternoon and Tuesday the 21st, but that’s back into the too-big range for this spot.
The end of the period, Wednesday the 22nd through Friday the 24th, shows a mix of small, clean glassy mornings and afternoons with cross-shore wind. The swells are 4 ft to 6 ft, but the periods are shorter (8 to 12 seconds) and the energy is moderate. Nothing special, but a few small windows for a log or a fun board.
So, to wrap it up: the best on offer is Sunday the 12th afternoon for the experienced crew, and Monday the 13th morning for the all-rounders. The second week is a bit of a gamble with a promising but uncertain Monday the 20th. Keep an eye on the wind.
Rusty.
Short Range ForecastMostly dry. Warm (max 27°C on Thu morning, min 23°C on Thu night). Wind will be generally light. | Days 4-6 Weather SummaryModerate rain (total 14mm), heaviest on Mon afternoon. Warm (max 30°C on Sun morning, min 25°C on Sun night). Wind will be generally light. | ||||||||||||||||||||
Thursday 9 | Friday 10 | Saturday 11 | Sunday 12 | Monday 13 | Tuesday 14 | Wednesday 15 | |||||||||||||||
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) | SSE 15 | SSE 15 | SSE 15 | S 17 | S 16 | S 17 | S 17 | SSW 18 | SSW 17 | SSW 16 | SSW 14 | SSW 13 | SSW 12 | S 11 | SSW 11 | S 10 | SSW 10 | SSW 9 | SSW 9 | SSW 9 | ESE 9 |
Wave Graph | |||||||||||||||||||||
3009 | 3513 | 3640 | 6993 | 7220 | 9483 | 9878 | 10208 | 8777 | 4548 | 2318 | 1110 | 669 | 279 | 350 | 204 | 131 | 88 | 64 | 61 | 48 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | cross-on | cross-off | on | cross-on | glassy | glassy | cross | cross-off | cross-off | cross-off | glassy | glassy | glassy | cross-off | glassy | cross-on | glassy | on | on | glassy |
High Tide | 2:09PM1.45m | 1:03AM1.64m | 3:37PM1.53m | 2:04AM1.65m | 4:41PM1.63m | 3:04AM1.70m | 5:29PM1.72m | 3:59AM1.75m | 6:09PM1.80m | 4:49AM1.82m | 6:44PM1.85m | 5:35AM1.87m | 7:16PM1.87m | ||||||||
Low Tide | 7:11PM1.13m | 8:25AM0.53m | 8:35PM1.20m | 9:27AM0.41m | 9:47PM1.21m | 10:19AM0.29m | 10:43PM1.17m | 11:06AM0.20m | 11:28PM1.12m | 11:48AM0.14m | 00:09AM1.05m | 12:28PM0.12m | 00:46AM0.98m | ||||||||
4:58 | — | — | 5:00 | — | — | 5:00 | — | — | 5:01 | — | — | 5:01 | — | — | 5:01 | — | — | 5:03 | — | — | |
— | 7:15 | — | — | 7:15 | — | — | 7:15 | — | — | 7:15 | — | — | 7:14 | — | — | 7:14 | — | — | 7:13 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | 4 | 1 | 4 | 1 | 1 | 3 | — | — | — | 1 |
Temp °C | 27 | 27 | 24 | 27 | 27 | 25 | 27 | 27 | 25 | 30 | 29 | 26 | 27 | 28 | 26 | 28 | 28 | 26 | 27 | 27 | 25 |
Feels °C | 30 | 30 | 27 | 30 | 31 | 30 | 31 | 30 | 29 | 34 | 33 | 31 | 32 | 33 | 31 | 32 | 33 | 32 | 31 | 31 | 30 |
Swell 1 Height (m) Direction Period (s) | SSE 15 | SSE 15 | SSE 15 | S 17 | S 16 | S 17 | S 17 | SSW 18 | SSW 17 | SSW 16 | SSW 14 | SSW 13 | SSW 12 | S 11 | SSW 11 | S 10 | SSW 10 | SSW 9 | SSW 9 | SSW 9 | ESE 9 |
3009 | 3513 | 3640 | 6993 | 7220 | 9483 | 9878 | 10208 | 8777 | 4548 | 2318 | 1110 | 669 | 279 | 350 | 204 | 131 | 88 | 64 | 61 | 48 | |
Swell 2 Height (m) Direction Period (s) | S 19 | E 8 | S 18 | — | — | — | — | — | — | SE 15 | E 9 | S 12 | SE 11 | SSW 12 | SE 12 | E 9 | SE 12 | ESE 8 | ESE 10 | ESE 9 | S 8 |
475 | 46 | 1129 | — | — | — | — | — | — | 8 | 7 | 103 | 18 | 184 | 35 | 14 | 36 | 14 | 31 | 33 | 35 | |
Swell 3 Height (m) Direction Period (s) | ESE 8 | — | E 8 | — | — | — | — | — | — | — | — | SE 11 | E 9 | SE 10 | E 9 | SE 10 | E 8 | SE 12 | SE 11 | SE 10 | SE 10 |
22 | — | 34 | — | — | — | — | — | — | — | — | 29 | 6 | 17 | 6 | 15 | 12 | 21 | 18 | 17 | 15 | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | E 6 | — | — | NNE 3 | — | — | — | — | — |
— | — | — | — | — | — | — | — | — | — | — | — | 1 | — | — | 3 | — | — | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 33 | 4 | 4 | 30 | 4 | 4 | 30 | 16 | 10 | 15 | 0 | 0 | 0 | 0 | 0 | 0 | 33 | 0 | 30 | 33 | 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.










