
Surf Forecasts:
Ikumi Beach surf forecast from 19 Jul 2026:
- Best quality surf: Monday 20 Jul, 12AM (local time) - 1.5ft (0.4m), 9s period, SE swell with cross-offshore winds.
- Most powerful swell: Saturday 25 Jul, 3AM (local time) - 1.5ft (0.4m), 16s period, SE swell with 94 kJ wave energy.
- Next surfable swell (1★+): Monday 20 Jul, 12AM (local time) - 1.5ft (0.4m), 9s 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 Monday (Jul 20) at 12AM. The primary swell is predicted to be 0.4m and 9s period with a secondary swell of 0.4m and 5s. Another secondary swell of 0.3m and 9s is also forecast. 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 0.4m 16s and forecast to arrive on Saturday (Jul 25) at 3AM. Winds are predicted to be glassy at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 3s period and expected on Tuesday (Jul 21) at 6PM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12AM (Mon 20th Jul) | 1.5ft (0.4m) 9s |
| Best Surf | 12AM (Mon 20th Jul) | 1.5ft (0.4m) 9s |
| Most Powerful | 3AM (Sat 25th Jul) | 1.5ft (0.4m) 16s |
Table - best surf conditions forecast for Ikumi Beach over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s have a look at what’s heading our way at Ikumi Beach.
First up, the brutal truth: we’ve got a long stretch of nothing good on the cards. From now through the 26th of July, it’s flat and frustrated. The swell is tiny, mostly under 1ft, and the energy is weak (combined energy of all swells directed here is in the 20s to 80s). The wind is okay at times, but with next to no waves, it’s just a bunch of pretty, clean puddles. It’s a dry spell, and it’s going to feel like a long one.
Then, things start to look a little interesting. On the 27th of July, Monday morning, we see a pulse of 3ft swell from the south, with a period of 15 seconds. That’s a long period groundswell, so it’ll have some push, but for a beach break it might be a bit too straight. The energy jumps to 921 (moderate). Still, it’s only a 2 out of 10 in my book, and the wind is onshore from the east, so it’s messy. Monday afternoon gets up to 6ft, but the wind is still cross-onshore.
Now, the standout. The 28th of July, Tuesday morning, is the one to circle. We’ve got 7ft of swell from the south, period 14 seconds, and glassy conditions. The energy is strong (2047), and the report says excellent surf conditions for experienced surfers. This is for the big kids only – over 8ft is expert territory, and 7ft is still solid and powerful. The wind is glassy, so it’ll be clean. This is the best option on offer. Tuesday afternoon gets a bit bigger (8ft), but the wind shifts cross-shore and the gloss is gone, so it’s not as good.
The 29th of July, Wednesday, stays in the 7ft to 8ft range, but the wind is cross-shore, so it’s not as clean. The energy is still strong (1500-1898), but it’s a step down.
After the 29th, things go downhill fast. The 30th of July brings strong onshore winds (12-19 mph) and the swell drops. By the 31st, we’re into strong cross-onshore winds and lumpy, blown-out conditions. The 1st of August is a mess of rain and strong wind. The 2nd and 3rd of August have bigger swell (7ft to 8ft), but with onshore winds from the east, it’s going to be a washing machine. The energy is huge (over 3000), but it’s unsurfable for paddle surfing. Honestly, that setup on the 3rd of August with 8ft and onshore wind looks more interesting for kite surfing than anything else.
Water temp is around 82°, which is about 1° above average for this time of year – nothing unusual, just a nice warm tropical bath.
So, to sum it up: suffer through the flat spell until the 27th, then get ready for Tuesday morning the 28th of July. That’s your window. After that, the wind trashes it.
Rusty.
Short Range ForecastLight rain (total 3mm), mostly falling on Tue morning. Warm (max 31°C on Mon morning, min 26°C on Sun night). Wind will be generally light. | Days 4-6 Weather SummaryModerate rain (total 16mm), heaviest on Thu night. Warm (max 32°C on Thu afternoon, min 27°C on Wed night). Wind will be generally light. | ||||||||||||||||||||
Sunday 19 | Monday 20 | Tuesday 21 | Wednesday 22 | Thursday 23 | Friday 24 | Saturday 25 | |||||||||||||||
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 9 | ESE 10 | SE 9 | ESE 9 | ESE 11 | ESE 7 | ESE 11 | ESE 11 | ESE 11 | ESE 11 | ESE 10 | ESE 11 | SE 10 | SE 10 | SE 18 | SE 18 | SE 18 | SE 16 | SE 16 | SE 16 | SE 16 |
Wave Graph | |||||||||||||||||||||
17 | 18 | 20 | 31 | 12 | 9 | 11 | 23 | 22 | 22 | 11 | 11 | 25 | 25 | 50 | 49 | 49 | 42 | 91 | 90 | 86 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross | cross-off | cross | cross | off | cross-on | cross | off | glassy | cross | off | glassy | cross | off | glassy | cross | off | glassy | cross-on | off |
High Tide | 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 | 2:51PM1.48m | 1:04AM1.64m | 4:14PM1.58m | 2:19AM1.65m | ||||||||
Low Tide | 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 | 7:28AM0.61m | 7:28PM1.27m | 8:44AM0.52m | 9:06PM1.29m | ||||||||
5:05 | — | — | 5:05 | — | — | 5:07 | — | — | 5:07 | — | — | 5:07 | — | — | 5:07 | — | — | 5:09 | — | — | |
— | 7:12 | — | — | 7:10 | — | — | 7:10 | — | — | 7:09 | — | — | 7:08 | — | — | 7:08 | — | — | 7:07 | — | |
mm | — | — | — | — | — | — | 1 | 2 | — | 1 | 3 | 1 | 2 | 2 | 3 | 1 | 2 | 1 | 1 | 2 | 1 |
Temp °C | 30 | 30 | 27 | 31 | 31 | 27 | 30 | 31 | 27 | 30 | 31 | 27 | 30 | 32 | 27 | 31 | 31 | 28 | 31 | 31 | 27 |
Feels °C | 34 | 34 | 33 | 35 | 35 | 32 | 36 | 36 | 32 | 36 | 36 | 32 | 35 | 37 | 32 | 36 | 35 | 33 | 35 | 35 | 32 |
Swell 1 Height (m) Direction Period (s) | ESE 5 | ESE 10 | SE 5 | ESE 9 | ESE 7 | ESE 7 | ESE 11 | ESE 11 | ESE 11 | ESE 11 | ESE 10 | ESE 11 | SE 10 | SE 10 | SE 10 | SE 10 | SE 9 | SE 11 | SE 11 | SE 10 | SE 10 |
10 | 18 | 6 | 31 | 10 | 9 | 11 | 23 | 22 | 22 | 11 | 11 | 25 | 25 | 16 | 23 | 14 | 41 | 41 | 36 | 49 | |
Swell 2 Height (m) Direction Period (s) | ESE 9 | SE 8 | ESE 9 | SSE 9 | SSE 8 | SSE 8 | SSE 8 | SSE 8 | SSE 8 | SSE 8 | SSE 8 | SSE 7 | SSW 8 | SE 19 | SE 18 | SE 18 | SE 18 | SE 16 | SE 16 | SE 16 | SE 16 |
17 | 9 | 16 | 7 | 7 | 7 | 7 | 6 | 6 | 6 | 6 | 5 | 6 | 15 | 50 | 49 | 49 | 42 | 91 | 90 | 86 | |
Swell 3 Height (m) Direction Period (s) | SE 8 | ESE 12 | SE 9 | ESE 12 | ESE 11 | SSW 3 | ESE 6 | ESE 6 | SE 6 | SSW 3 | S 7 | SE 11 | SE 20 | S 8 | SSE 8 | S 7 | SE 12 | S 7 | S 8 | S 8 | ESE 4 |
10 | 14 | 20 | 14 | 12 | 2 | 4 | 4 | 2 | 1 | 1 | 4 | 15 | 5 | 7 | 4 | 21 | 4 | 5 | 5 | 2 | |
Wind waves Height (m) Direction Period (s) | — | SE 5 | SW 5 | — | S 2 | SW 3 | — | SW 2 | SW 3 | SW 3 | SSW 3 | SSW 3 | NNE 2 | SSW 4 | SW 2 | N 3 | — | ESE 3 | ESE 4 | ESE 4 | — |
— | 11 | 5 | — | 1 | 2 | — | 1 | 3 | 3 | 1 | 1 | 1 | 1 | 1 | 3 | — | 1 | 5 | 7 | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 16 | 16 | 0 | 16 | 16 | 16 | 16 | 338 | 16 | 55 | 276 | 280 | 0 | 445 | 0 | 0 | 4 | 0 | 0 | 4 | 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.










