Surf Forecasts:
Ikumi Beach surf forecast from 10 Aug 2026:
- Best quality surf: Monday 10 Aug, 6PM (local time) - 3.5ft (1.0m), 10s period, S swell with glassy winds.
- Most powerful swell: Tuesday 11 Aug, 3AM (local time) - 3.5ft (1.0m), 11s period, S swell with 238 kJ wave energy.
- Next surfable swell (1★+): Monday 10 Aug, 6PM (local time) - 3.5ft (1.0m), 10s period with S 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 (Aug 10) at 6PM. The primary swell is predicted to be 1.0m and 10s period with a secondary swell of 0.7m and 12s. 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 1.0m 11s and forecast to arrive on Tuesday (Aug 11) at 3AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 4s period and expected on Tuesday (Aug 11) at 9PM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6PM (Mon 10th Aug) | 3.5ft (1.0m) 10s |
| Best Surf | 6PM (Mon 10th Aug) | 3.5ft (1.0m) 10s |
| Most Powerful | 3AM (Tue 11th Aug) | 3.5ft (1.0m) 11s |
Table - best surf conditions forecast for Ikumi Beach over the next 16 days.
The Lowdown
Alright, Rusty here. Let’s break down Ikumi Beach.
Water temp is about 84°F, pretty normal for this time of year with no major temperature weirdness. The opening call has wave energy at (513) – moderate, not massive. The best window in the whole 16-day stretch is Monday morning, August 10th. You’ve got a 4ft south groundswell with a 10-second period, glassy wind out of the northeast at just 3 mph, and that’s clean. This is the pick of the run. Just know crowds are often a factor here, so don’t expect solitude.
That Monday afternoon goes sour fast – onshore wind and dicey tide conditions. Tuesday the 11th is crosswind junk with 3ft of south swell and energy at (326). Not worth your time. Wednesday the 12th morning is glassy again but the swell is only 3ft from the SSW with energy at (216). It’s okay but nothing special.
From Thursday the 13th through the weekend, it’s rough. Storm risks, onshore winds, and swell drops to 2ft with energy in the (100-150) range. A few glassy mornings pop up on Friday the 14th, Saturday the 15th, and Sunday the 16th, but the waves are small and ordinary. The only other nod goes to Monday morning, August 17th. Swell bumps back to 4ft but it’s a short-period easterly windswell at 6 seconds, glassy early but messy. Energy is only (149). This looks better for kite surfing than paddle surfing given the wind and short period.
The second week is a wash. From August 18th through the 25th, it’s mostly poor: small 1ft to 3ft waves, low energy, and only brief glassy moments that still don’t deliver. Best you could do is Saturday morning the 22nd with 3ft from the south-southeast and glassy calm, but it’s weak. There’s a long gap of no real recommendations after the first week, so don’t plan a big trip around this spot right now.
It’ll come back around – it usually does.
Rusty.
Short Range ForecastModerate rain (total 16mm), heaviest on Thu morning. Warm (max 30°C on Mon afternoon, min 22°C on Tue night). Wind will be generally light. | Days 5-7 Weather SummaryModerate rain (total 10mm), heaviest on Thu afternoon. Warm (max 29°C on Sat morning, min 23°C on Thu night). Wind will be generally light. | |||||||||||||||||||
Mon 10 | Tuesday 11 | Wednesday 12 | Thursday 13 | Friday 14 | Saturday 15 | Sunday 16 | ||||||||||||||
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) | S 10 | S 10 | S 10 | SSW 10 | SSW 10 | SSW 10 | S 10 | S 9 | SSW 9 | SSW 9 | S 9 | S 9 | S 9 | S 8 | S 10 | SSW 10 | S 9 | S 10 | S 9 | ESE 11 |
Wave Graph  | ||||||||||||||||||||
 kJ | 190 | 216 | 216 | 173 | 173 | 92 | 88 | 83 | 88 | 86 | 79 | 78 | 56 | 71 | 125 | 128 | 108 | 90 | 81 | 202 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | cross-off | cross | cross-on | cross-off | glassy | on | glassy | cross-on | on | glassy | glassy | cross-on | off | glassy | cross-on | glassy | on | cross | off |
High Tide | 5:20PM1.74m | 3:55AM1.74m | 5:52PM1.82m | 4:48AM1.84m | 6:20PM1.88m | 5:34AM1.93m | 6:47PM1.92m | 6:16AM1.99m | 7:13PM1.94m | 6:56AM2.01m | 7:39PM1.94m | 7:35AM1.99m | 8:04PM1.93m | |||||||
Low Tide | 10:39PM1.19m | 10:55AM0.31m | 11:20PM1.07m | 11:36AM0.25m | 11:55PM0.95m | 12:13PM0.24m | 00:28AM0.83m | 12:48PM0.27m | 1:01AM0.72m | 1:20PM0.34m | 1:34AM0.63m | 1:52PM0.45m | 2:09AM0.57m | |||||||
 |  |  |  |  | |  |  | | |  | | | | | | | | | | |
 | — | — | 5:20 | — | — | 5:22 | — | — | 5:22 | — | — | 5:22 | — | — | 5:24 | — | — | 5:24 | — | — |
 | 6:54 | — | — | 6:53 | — | — | 6:52 | — | — | 6:52 | — | — | 6:51 | — | — | 6:50 | — | — | 6:49 | — |
mm | 1 | — | — | — | — | — | 1 | 7 | 7 | 4 | 3 | — | 2 | — | — | — | — | 1 | 2 | 1 |
Temp °C | 30 | 26 | 30 | 30 | 24 | 27 | 26 | 25 | 25 | 26 | 25 | 28 | 28 | 25 | 29 | 29 | 25 | 28 | 28 | 25 |
Feels °C | 34 | 30 | 31 | 31 | 27 | 29 | 28 | 29 | 28 | 30 | 29 | 31 | 31 | 29 | 31 | 32 | 29 | 32 | 31 | 29 |
Swell 1 Height (m) Direction Period (s) | S 10 | S 10 | S 10 | SSW 10 | SSW 10 | S 9 | S 10 | S 9 | SSW 9 | SSW 9 | S 9 | S 9 | S 9 | S 8 | S 10 | SSW 10 | S 9 | S 10 | S 9 | ESE 11 |
| kJ | 190 | 216 | 216 | 173 | 173 | 85 | 88 | 83 | 88 | 86 | 79 | 78 | 56 | 71 | 125 | 128 | 108 | 90 | 81 | 202 |
Swell 2 Height (m) Direction Period (s) | E 12 | E 12 | E 11 | E 11 | E 11 | SSW 10 | SSW 10 | SW 10 | ESE 4 | ESE 4 | ESE 4 | E 9 | ESE 9 | E 10 | ESE 11 | E 11 | ESE 10 | E 10 | E 10 | S 9 |
| kJ | 144 | 101 | 63 | 57 | 35 | 92 | 58 | 26 | 3 | 1 | 3 | 15 | 16 | 30 | 24 | 82 | 74 | 51 | 33 | 54 |
Swell 3 Height (m) Direction Period (s) | SW 11 | SE 14 | SE 13 | SE 13 | NE 4 | E 10 | E 10 | ESE 5 | E 9 | E 9 | E 10 | SE 11 | SE 11 | SE 11 | SE 8 | SE 8 | SE 12 | SE 12 | SE 11 | SE 11 |
| kJ | 56 | 31 | 28 | 27 | 4 | 19 | 19 | 2 | 7 | 15 | 16 | 20 | 19 | 29 | 11 | 10 | 23 | 49 | 45 | 43 |
Wind waves Height (m) Direction Period (s) | NE 4 | NE 4 | NE 4 | NE 5 | N 4 | NNE 4 | — | E 5 | E 7 | — | — | — | — | — | — | — | — | — | ESE 5 | SE 4 |
| kJ | 3 | 14 | 14 | 49 | 11 | 1 | — | 7 | 23 | — | — | — | — | — | — | — | — | — | 30 | 21 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 14 | 0 | 8 | 8 | 0 | 0 | 33 | 0 | 30 | 30 | 0 | 0 | 4 | 0 | 0 | 4 | 0 | 33 | 4 | 0 |
Best forecast wave conditions in Shikoku | ||||||||||||||||||||
Best forecast wave conditions in Japan | ||||||||||||||||||||
Header Global | ||||||||||||||||||||
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
Latest Updates
FREE! Surf-Forecast.com widget for your website
The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Ikumi Beach surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.
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.
Nearest