
Surf Forecasts:
Ikumi Beach surf forecast from 12 Jul 2026:
- Best quality surf: Sunday 19 Jul, 12AM (local time) - 10ft (3.0m), 11s period, ESE swell with glassy winds.
- Most powerful swell: Sunday 12 Jul, 6PM (local time) - 8ft (2.4m), 14s period, SSW swell with 2,127 kJ wave energy.
- Next surfable swell (1★+): Sunday 12 Jul, 6PM (local time) - 8ft (2.4m), 14s 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 (Jul 12) at 6PM. The primary swell is predicted to be 2.4m and 14s 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 2.4m 14s and forecast to arrive on Sunday (Jul 12) at 6PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.6m 4s period and expected on Monday (Jul 13) at 3AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6PM (Sun 12th Jul) | 8ft (2.4m) 14s |
| Best Surf | 12AM (Sun 19th Jul) | 10ft (3.0m) 11s |
| Most Powerful | 6PM (Sun 12th Jul) | 8ft (2.4m) 14s |
Table - best surf conditions forecast for Ikumi Beach over the next 16 days.
Alright, let’s get into it.
First up, we’ve got a real standout session coming on Sunday the 12th of July at Ikumi Beach. This is not one for the faint-hearted. The early morning is looking *glass* – dead calm – with a solid 10ft SSW groundswell, period a massive 16 seconds. That’s very long-period energy, so expect proper lines, but this spot is exposed, and with that size it’s going to be way too big for beginners. The water is a bit colder than usual for this time of year at 77°, about 3° off the norm. The combined swell energy is huge at (4895), so you’re feeling the full force of the ocean. This is truly for experienced surfers only. The wind stays light and glassy into the afternoon, with the swell easing a touch to 8ft, still very solid.
Come Monday morning the 13th, the swell drops to a much more manageable 5ft from the SSW, with a period of 12 seconds. Winds are still glassy, offering clean conditions. The energy is moderate at (707). This is the pick of the week for most surfers – cleaner, less intimidating, and still plenty of push. The afternoon sees the wind swing onshore, so morning is definitely the call.
Tuesday the 14th is small, with 3ft SSW swell, 10-second period, and glassy winds. It’s rideable but ordinary. The combined energy is weak at (248). Through the middle of the week we’ve got a real flat spell – Wednesday and Thursday morning are barely breaking, with heights under 2ft and poor winds.
Then things get interesting again on Saturday the 18th. A new pulse of ESE swell builds to 6ft with a 13-second period. The winds are light but cross-onshore, so it won’t be perfect, but the energy is solid at (939). This is a bit of a wildcard.
The best of the second week is Sunday the 19th. A 8ft ESE swell, 9-second period, and glassy conditions in the morning. That’s hefty size again – only for experienced crew – with strong energy (1593). The wind stays clean, but the period is shorter, so the waves might be a bit lumpy and powerful.
From the 20th onward, the surf winds down. Monday the 20th holds around 5ft, but winds are messy. The rest of the week sees heights drop to under 3ft, and conditions are mostly poor. There’s a weak spike of long-period energy on the 26th, but at 1ft it’s not worth getting excited about. The final days show tiny surf and ordinary winds, so the window closes after that Sunday the 19th.
Overall, the standout windows are Sunday the 12th for the big-swell crew, and Monday the 13th morning for everyone else. Sunday the 19th is worth a look for experienced surfers, but it’s more of a long-range call.
Rusty.
Short Range ForecastSome drizzle, heaviest during Sun afternoon. Warm (max 31°C on Sun morning, min 26°C on Sun night). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 9mm), mostly falling on Thu night. Warm (max 31°C on Wed morning, min 25°C on Fri night). Wind will be generally light. | ||||||||||||||||||||
Sunday 12 | Monday 13 | Tuesday 14 | Wednesday 15 | Thursday 16 | Friday 17 | Saturday 18 | |||||||||||||||
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) | SSW 16 | SSW 14 | SSW 13 | SSW 12 | SSW 11 | SSW 11 | SSW 10 | SSW 10 | SSW 9 | SSW 9 | SSW 9 | ESE 10 | SSW 8 | SSW 8 | SSW 8 | ESE 10 | SE 10 | ESE 16 | ESE 13 | ESE 13 | ESE 11 |
Wave Graph | |||||||||||||||||||||
4895 | 2763 | 1256 | 683 | 512 | 292 | 209 | 166 | 86 | 64 | 61 | 39 | 37 | 35 | 23 | 18 | 17 | 469 | 908 | 838 | 1796 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | glassy | off | glassy | on | cross-off | glassy | cross-on | glassy | cross-on | cross-on | glassy | cross-on | glassy | glassy | cross-on | on | glassy | cross-on | on | glassy |
High Tide | 5:29PM1.72m | 3:59AM1.75m | 6:09PM1.80m | 4:49AM1.82m | 6:44PM1.85m | 5:35AM1.87m | 7:16PM1.87m | 6:19AM1.90m | 7:47PM1.88m | 7:02AM1.91m | 8:17PM1.87m | 7:45AM1.88m | 8:47PM1.85m | ||||||||
Low Tide | 10:19AM0.29m | 10:43PM1.17m | 11:06AM0.20m | 11:28PM1.12m | 11:48AM0.14m | 00:09AM1.05m | 12:28PM0.12m | 00:46AM0.98m | 1:05PM0.15m | 1:23AM0.90m | 1:41PM0.22m | 2:00AM0.83m | 2:17PM0.33m | 2:38AM0.78m | |||||||
5:01 | — | — | 5:01 | — | — | 5:01 | — | — | 5:03 | — | — | 5:03 | — | — | 5:03 | — | — | 5:05 | — | — | |
— | 7:15 | — | — | 7:14 | — | — | 7:14 | — | — | 7:13 | — | — | 7:13 | — | — | 7:13 | — | — | 7:12 | — | |
mm | — | 1 | — | — | — | — | — | — | — | — | — | — | 1 | 3 | 4 | 1 | — | — | 1 | — | — |
Temp °C | 31 | 30 | 27 | 31 | 30 | 29 | 31 | 31 | 28 | 31 | 31 | 28 | 31 | 29 | 27 | 29 | 29 | 26 | 28 | 28 | 25 |
Feels °C | 34 | 35 | 32 | 36 | 35 | 34 | 35 | 35 | 33 | 35 | 35 | 33 | 35 | 33 | 32 | 34 | 33 | 32 | 32 | 31 | 29 |
Swell 1 Height (m) Direction Period (s) | SSW 16 | SSW 14 | SSW 13 | SSW 12 | SSW 11 | SSW 11 | SSW 10 | SSW 10 | SSW 9 | SSW 9 | SSW 9 | SSW 8 | SSW 8 | SSW 8 | SSW 8 | ESE 10 | ESE 9 | ESE 16 | ESE 13 | ESE 13 | ESE 11 |
4895 | 2763 | 1256 | 683 | 512 | 292 | 209 | 166 | 86 | 64 | 61 | 39 | 37 | 35 | 23 | 18 | 17 | 469 | 908 | 838 | 1307 | |
Swell 2 Height (m) Direction Period (s) | — | SE 15 | SE 10 | SE 10 | SE 10 | SE 12 | SE 12 | SE 12 | SE 11 | SE 11 | ESE 10 | ESE 10 | SE 10 | SE 10 | ESE 10 | SW 7 | SE 10 | SE 4 | SE 4 | ESE 6 | SW 7 |
— | 8 | 23 | 17 | 17 | 21 | 36 | 36 | 31 | 29 | 42 | 39 | 14 | 15 | 18 | 13 | 14 | 7 | 8 | 53 | 2 | |
Swell 3 Height (m) Direction Period (s) | — | — | SE 11 | SE 13 | SE 13 | E 9 | E 9 | E 9 | SE 11 | SE 11 | S 8 | SE 11 | ESE 10 | ESE 10 | SE 10 | SE 9 | SW 6 | SE 10 | SSW 7 | SSW 7 | SW 9 |
— | — | 20 | 7 | 7 | 6 | 2 | 6 | 20 | 18 | 1 | 18 | 19 | 18 | 15 | 14 | 6 | 35 | 5 | 5 | 3 | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | NNE 3 | NE 3 | WSW 3 | — | — | — | — | — | — | SSE 2 | — | — | ESE 4 | — | ESE 11 |
— | — | — | — | — | — | 1 | 2 | 1 | — | — | — | — | — | — | 1 | — | — | 18 | — | 1796 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 10 | 0 | 0 | 0 | 8 | 0 | 0 | 33 | 0 | 16 | 16 | 0 | 16 | 0 | 0 | 30 | 471 | 0 | 30 | 30 | 4 |
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.










