Surf Forecasts:
Irmas/Leftpoint surf forecast from 23 Aug 2026:
- Most powerful swell: Thursday 27 Aug, 11AM (local time) - 4ft (1.2m), 17s period, S swell with 861 kJ wave energy.
Best Forecast Surf Conditions for Irmas/Leftpoint this week:
The most powerful waves expected at Irmas/Leftpoint in the next 16 days are 1.2m 17s and forecast to arrive on Thursday (Aug 27) at 11AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 15s period and expected on Sunday (Aug 23) at 2PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 11AM (Thu 27th Aug) | 4ft (1.2m) 17s |
Table - best surf conditions forecast for Irmas/Leftpoint over the next 16 days.
The Lowdown
G’day, Rusty here, and I’ve gotta be straight with you – the next couple of weeks at Irmas/Leftpoint are looking like a right mess for most of it. The forecast is a bit of a long grind before we see any real quality.
Right off the bat, starting Sunday the 23rd of August, we’ve got a strong cross-shore wind howling at 25 mph from the ENE, whipping up a messy cross-chop on a 7 ft swell. The combined wave energy is weak at 631, and the period is a short, crumbly 7 seconds. It’s poor, and it’s going to stay that way. The wind barely lets up for days – it’s a constant ENE breeze, fresh to strong, keeping the surf lumpy and cross-onshore right through the week. The swell sticks around 5 ft to 7 ft, but with that wind, it’s just not worth paddling out for. The water is sitting at 81°F, which is about average for this time of year, so not much to get excited about there.
We do see a little shift on Thursday the 27th of August. The swell direction swings to the south, with a long period of 17 seconds, and the energy jumps to moderate (1035). The problem? It’s still a cross-shore wind, and the swell is only 4 ft. The forecast calls it marginal, and honestly, with that wind, it’s still a battle. By Friday, it drops back off.
The next real chance comes on Tuesday the 1st of September. The swell builds to 8 ft from the ENE, with a period of 9 seconds and strong energy (1397). But that morning, there’s a risk of thunderstorms, and the wind is still cross-shore. It’s a marginal one at best – not clean, not inviting.
Now, let’s talk about the standout. The best on offer is Monday the 7th of September. That afternoon, the wind finally drops to a light breeze from the north, turning cross-offshore. The swell is a solid 10 ft from the ENE, with a long period of 12 seconds and very strong wave energy (3768). The forecast says it’s excellent for experienced surfers, and that’s because 10 ft is well into expert territory. The period is long enough to bring real power, but at a reef break like Irmas/Leftpoint, that long period should set up nicely. Keep in mind, this is a week and a half away, so it’s promising but not locked in yet. Still, if it comes together, it’ll be the one to aim for.
The rest of the time? There’s a lot of nothing. Long stretches of poor surf with that relentless cross-shore wind. The setup is more interesting for kite surfing than paddle surfing on most days, with that strong breeze and lumpy water. For us, it’s a waiting game until that first week of September.
Rusty.
Short Range ForecastMostly dry. Warm (max 26°C on Sun morning, min 25°C on Sun morning). Mainly strong winds. | Days 4-6 Weather SummaryMostly dry. Warm (max 25°C on Wed morning, min 25°C on Wed morning). Mainly fresh winds. | ||||||||||||||||||||
Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | Friday 28 | Saturday 29 | |||||||||||||||
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) | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | E 7 | E 7 | ENE 7 | ENE 7 | ENE 6 | S 18 | S 19 | S 17 | S 16 | S 16 | S 14 | S 14 | S 13 | ENE 7 | ENE 7 | ENE 7 |
Wave Graph | |||||||||||||||||||||
395 | 384 | 342 | 308 | 225 | 278 | 416 | 355 | 317 | 282 | 307 | 458 | 861 | 427 | 590 | 260 | 329 | 233 | 239 | 249 | 317 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross | cross-on | cross | cross-on | cross-on | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross |
High Tide | 12:51PM0.62m | 00:45AM0.24m | 1:26PM0.65m | 1:20AM0.27m | 1:56PM0.66m | 1:55AM0.30m | 2:25PM0.67m | 2:30AM0.34m | 2:53PM0.66m | 3:07AM0.39m | 3:21PM0.62m | 3:47AM0.44m | 3:48PM0.58m | 4:31AM0.49m | |||||||
Low Tide | 8:29PM0.12m | 6:13AM0.06m | 8:49PM0.11m | 6:56AM0.04m | 9:09PM0.10m | 7:36AM0.04m | 9:29PM0.09m | 8:15AM0.04m | 9:49PM0.07m | 8:57AM0.06m | 10:10PM0.06m | 9:43AM0.10m | 10:32PM0.05m | ||||||||
6:11 | — | — | 6:11 | — | — | 6:11 | — | — | 6:11 | — | — | 6:11 | — | — | 6:11 | — | — | 6:13 | — | — | |
— | 6:53 | — | — | 6:52 | — | — | 6:52 | — | — | 6:52 | — | — | 6:51 | — | — | 6:50 | — | — | 6:49 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 |
Feels °C | 23 | 23 | 24 | 25 | 25 | 26 | 24 | 23 | 22 | 21 | 22 | 22 | 23 | 22 | 22 | 23 | 21 | 22 | 22 | 22 | 21 |
Swell 1 Height (m) Direction Period (s) | SSW 15 | SSW 15 | SW 14 | SSW 14 | E 8 | SSW 13 | SSW 12 | SSW 16 | SSW 15 | SSW 14 | S 18 | S 19 | S 17 | S 16 | S 16 | S 14 | S 14 | S 13 | E 12 | E 13 | E 13 |
146 | 191 | 100 | 168 | 69 | 129 | 85 | 196 | 121 | 215 | 307 | 458 | 861 | 427 | 590 | 260 | 329 | 225 | 113 | 125 | 161 | |
Swell 2 Height (m) Direction Period (s) | S 13 | SSE 13 | SSE 13 | SSE 12 | SSW 13 | SSE 7 | SSW 16 | SSW 12 | SSW 12 | SSW 18 | SSW 12 | SSW 13 | NNE 8 | S 12 | NNE 8 | NNE 7 | E 14 | E 13 | S 13 | S 13 | S 12 |
90 | 35 | 56 | 86 | 156 | 15 | 146 | 81 | 81 | 106 | 45 | 96 | 14 | 72 | 20 | 17 | 62 | 83 | 85 | 89 | 102 | |
Swell 3 Height (m) Direction Period (s) | WNW 11 | SSE 11 | SSW 15 | SSW 18 | SSE 12 | SSW 17 | SSE 12 | SSE 11 | SSW 18 | S 21 | SSW 13 | SSW 16 | WNW 10 | NNE 8 | WNW 9 | SSW 11 | SSW 19 | SW 19 | S 13 | S 12 | SSW 17 |
23 | 25 | 71 | 62 | 48 | 94 | 47 | 42 | 108 | 79 | 59 | 50 | 9 | 13 | 8 | 22 | 36 | 56 | 89 | 76 | 188 | |
Wind waves Height (m) Direction Period (s) | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | E 7 | E 7 | ENE 7 | ENE 7 | ENE 6 | ENE 7 | ENE 6 | ENE 6 | ENE 6 | E 6 | ENE 6 | ENE 6 | ENE 6 | ENE 7 | ENE 7 | ENE 7 |
395 | 384 | 342 | 308 | 225 | 278 | 416 | 355 | 317 | 282 | 232 | 230 | 160 | 153 | 161 | 139 | 212 | 233 | 239 | 249 | 317 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 56 | 62 | 56 | 56 | 49 | 49 | 56 | 56 | 49 | 56 | 51 | 49 | 49 | 60 | 18 | 49 | 60 | 49 | 49 | 56 | 49 |
Best forecast wave conditions in Oahu | |||||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||||
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Information about the Irmas/Leftpoint Surf forecast
The above surf forecast table for Irmas/Leftpoint provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Irmas/Leftpoint can be found by selecting the local surf guide option on the grey menu. Our Irmas/Leftpoint 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 (Irmas/Leftpoint) 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 Irmas/Leftpoint 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.
Irmas/Leftpoint is 15 km (9 miles) from the city of Kailua. If you plan a vacation in Oahu, look for hotels and other accommodation in Kailua. Kailua has rooms for a wide range of budgets as well as car hire and transport links.











