
Surf Forecasts:
Ikei Island surf forecast from 11 Sep 2026:
- Most powerful swell: Saturday 19 Sep, 3AM (local time) - 5ft (1.6m), 17s period, E swell with 1,537 kJ wave energy.
Best Forecast Surf Conditions for Ikei Island this week:
The most powerful waves expected at Ikei Island in the next 16 days are 1.6m 17s and forecast to arrive on Saturday (Sep 19) at 3AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 6s period and expected on Saturday (Sep 12) at 6PM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 3AM (Sat 19th Sep) | 5ft (1.6m) 17s |
Table - best surf conditions forecast for Ikei Island over the next 16 days.
The Lowdown
Right then, let’s have a look at what Ikei Island has in store. We’ve got a run of flat to pretty ordinary conditions for a while, but there’s a big pulse of energy on the way later. The water temp is sitting about average for the time of year, so nothing wild there.
The first few days aren’t worth paddling out for, honestly. Saturday the 12th through to Monday the 15th of September, we’re looking at tiny 1ft to 2ft easterly slop with onshore or cross-onshore winds. The combined swell energy is weak to moderate, around 125 to 265 (units), but the texture is just poor. Not worth a second look.
Tuesday the 16th sees a tiny tick up to 3ft, but still easterly and onshore, with energy around 263 (units) – still poor. This dead patch runs right through until Friday the 19th. There’s a real gap of no worthwhile waves here from the start of the forecast right through that whole first week.
Now, things get interesting from Saturday the 20th of September. We’ve got a proper size jump to 8ft in the morning, pushing 12ft by the afternoon, from the east with a very long 18-second period. The combined energy rockets up to 3530 then 8492 (units) – that’s strong, no doubt. But here’s the catch: winds are a fresh cross-onshore from the NNE at 19 mph, making it lumpy and poor. This is big, powerful groundswell, but it’s not clean.
Sunday the 21st is even bigger – 15ft in the morning, 13ft in the afternoon, from the east, period dropping to 15 and 14 seconds. Energy is massive, hitting 9609 and 8592 (units). But wind is strong to near-gale, cross to cross-onshore from the north, and messy. This is well into expert only territory, and honestly, the wind makes it look more like a kite surfing show than a surfing one. Keep the big boards at home.
Monday the 22nd sees the swell still huge at 13ft, but it’s shifting from the NNW with a 12-second period. The winds go cross-offshore, then a gale-force offshore from the west. That gale will make the face clean, but paddling into a 13ft wave in that wind is near impossible for almost everyone. Massive energy (4012 and 3710 units) but not surfable.
Tuesday the 23rd of September is where we might finally get a window. Still big, 10ft to 8ft from the north, 13-second period, but winds are strong offshore from the west, then a fresh cross-offshore. The combined energy is still very high, 3330 and 2572 (units). The offshore wind will clean it right up, but you need to be a strong, experienced surfer to handle this. This is the standout – the best chance of a proper, clean, big-wave session at Ikei Island if you’ve got the skills.
Wednesday the 24th drops to a more manageable 6ft to 6ft from the north, 12-second period, with clean cross-offshore winds and energy around 1140 (units). A much better size for intermediate surfers, and the wind is good. This is a solid, clean option.
Thursday the 25th then gets messy again, with a 6ft to 6ft cross-onshore ESE swell, short period, and chop. The run from the 26th to the 27th fades into onshore winds and dropping swell. Not much to get excited about.
So the real standout is Tuesday the 23rd of September for the strong offshore winds and big north swell – that’s the one for the experts. For the average punter, Wednesday the 24th offers much cleaner, smaller waves at a moderate size. Keep an eye on that long-range window, but don’t hold your breath for the first week.
Rusty
Short Range ForecastLight rain (total 8mm), mostly falling on Sun night. Warm (max 29°C on Sun afternoon, min 27°C on Fri night). Wind will be generally light. | Days 5-7 Weather SummaryHeavy rain (total 33mm), heaviest during Mon night. Warm (max 29°C on Tue afternoon, min 27°C on Mon night). Wind will be generally light. | ||||||||||||||||||
Saturday 12 | Sunday 13 | Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | ||||||||||||||
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) | E 14 | E 14 | E 14 | E 14 | E 14 | ESE 7 | E 8 | E 8 | E 8 | E 9 | E 9 | E 10 | E 10 | E 10 | E 9 | E 9 | E 9 | E 9 | E 9 |
Wave Graph | |||||||||||||||||||
63 | 61 | 64 | 62 | 97 | 121 | 177 | 173 | 177 | 230 | 194 | 226 | 220 | 183 | 142 | 142 | 142 | 110 | 101 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | on | on | on | on | on | on | on | on | cross-on | on | cross-on | on | on | on | on | on | on |
High Tide | 7:05AM2.03m | 7:27PM1.96m | 7:43AM1.98m | 7:53PM1.95m | 8:21AM1.89m | 8:18PM1.91m | 8:59AM1.76m | 8:42PM1.85m | 9:37AM1.62m | 9:07PM1.77m | 10:22AM1.47m | 9:34PM1.67m | |||||||
Low Tide | 00:58AM0.40m | 1:18PM0.27m | 1:33AM0.31m | 1:48PM0.39m | 2:06AM0.28m | 2:16PM0.54m | 2:40AM0.30m | 2:43PM0.69m | 3:15AM0.36m | 3:08PM0.83m | 3:52AM0.46m | 3:34PM0.97m | |||||||
— | 6:11 | — | — | 6:11 | — | — | 6:11 | — | — | 6:13 | — | — | 6:13 | — | — | 6:13 | — | — | |
6:37 | — | 6:36 | — | — | 6:35 | — | — | 6:34 | — | — | 6:32 | — | — | 6:31 | — | — | 6:30 | — | |
mm | 3 | — | — | — | — | 1 | 4 | — | — | 11 | 8 | — | 2 | 1 | 5 | 3 | 3 | — | — |
Temp °C | 28 | 28 | 28 | 27 | 28 | 29 | 27 | 28 | 29 | 27 | 28 | 29 | 28 | 28 | 28 | 27 | 28 | 29 | 27 |
Feels °C | 32 | 31 | 30 | 29 | 29 | 30 | 29 | 30 | 31 | 30 | 32 | 31 | 31 | 31 | 31 | 30 | 32 | 32 | 29 |
Swell 1 Height (m) Direction Period (s) | N 7 | SE 6 | N 7 | E 14 | ESE 6 | ESE 7 | E 8 | E 8 | E 8 | E 9 | E 9 | E 10 | E 10 | E 10 | E 9 | E 9 | E 9 | E 9 | E 9 |
40 | 39 | 24 | 62 | 57 | 121 | 177 | 173 | 177 | 230 | 194 | 226 | 220 | 183 | 142 | 142 | 142 | 110 | 101 | |
Swell 2 Height (m) Direction Period (s) | E 14 | N 7 | E 14 | NNW 6 | E 14 | E 14 | E 13 | ENE 13 | ENE 13 | ENE 13 | ENE 13 | ENE 13 | NNW 5 | ENE 14 | NNW 6 | E 14 | E 13 | E 13 | E 13 |
63 | 25 | 64 | 13 | 97 | 101 | 92 | 58 | 57 | 59 | 34 | 35 | 3 | 63 | 16 | 104 | 90 | 87 | 86 | |
Swell 3 Height (m) Direction Period (s) | S 7 | E 14 | S 6 | S 7 | ESE 9 | S 6 | N 5 | N 5 | N 5 | — | — | NNW 6 | E 16 | NNW 7 | ENE 14 | NNW 6 | NNW 6 | NNW 6 | NNW 6 |
8 | 61 | 13 | 15 | 28 | 3 | 8 | 4 | 2 | — | — | 4 | 20 | 17 | 62 | 13 | 8 | 12 | 7 | |
Wind waves Height (m) Direction Period (s) | SE 6 | — | SE 6 | ESE 5 | — | NE 4 | — | — | — | — | — | — | — | — | — | — | — | — | — |
43 | — | 33 | 29 | — | 9 | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 23 | 23 | 23 | 27 | 27 | 27 | 27 | 639 | 26 | 27 | 24 | 24 | 23 | 23 | 24 | 23 | 23 | 23 | 27 |
Best forecast wave conditions in Okinawa | |||||||||||||||||||
Best forecast wave conditions in Japan | |||||||||||||||||||
Header Global | |||||||||||||||||||
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Information about the Ikei Island Surf forecast
The above surf forecast table for Ikei Island provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Ikei Island can be found by selecting the local surf guide option on the grey menu. Our Ikei Island 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 (Ikei Island) 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 Ikei Island 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.
Ikei Island is 14 km (9 miles) from Gushikawa. If you plan a holiday in Okinawa, look for hotels and other accommodation in Gushikawa. Gushikawa has rooms for a wide range of budgets as well as car hire and transport links.










