Surf Forecasts:
Irmas/Leftpoint surf forecast from 25 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 14s period and expected on Monday (Aug 31) at 8PM.
| 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
Alright, let’s have a look at what’s coming down the pipe for Irmas/Leftpoint. I’ve been staring at the charts, and I’m not gonna lie to you, it’s looking like a bit of a dry spell for a while.
Right off the bat, Monday afternoon kicks off with nothing. The swell is 1.7m from the east, but the period is a weak 7 seconds, and the wind is blowing 25 km/h out of the ENE, straight across the break. It’s choppy junk. That's all you need to know.
Tuesday, Wednesday, and the rest of that first week are all pretty much the same story. The wind stays stuck out of the ENE, blowing 30 to 40 km/h, cross-shore or cross-onshore. We do see some 1.8m to 2.0m swell, but with periods of only 6 to 8 seconds, it’s short-period wind slop. The energy readings are moderate, like around 600 to 700, but that wind just ruins everything.
There is one little moment on Thursday morning the 27th of August. A 1.2m south swell rolls in with a 17-second period—that’s proper groundswell—and the energy reads a strong 1033. But it's still a fresh 30 km/h cross-shore wind, so it’s just a tease. It’s labelled marginal, not good.
Look, for the next 10 days, we are looking at a lot of "poor surf conditions" in the notes. The wind is just relentless. It might be better for a kite than a paddle out there.
Rolling into the first of September, on Monday the 31st of August afternoon, the swell hits 2.5m from the ENE with an 8-second period. That’s getting up there in size—too big for beginners and a handful for the average surfer. The energy is strong at 1162, but the cross-shore wind makes it a washing machine for experts only.
Finally, around the 5th and 6th of September, we start to see a real shift. The swell remains around 1.5m to 1.6m from the ENE, but the period stretches to 11 and 12 seconds. This is proper groundswell energy, and the readings jump to over 1000, hitting 1206 on one of the afternoons. It's onshore, mind you, so not clean, but the power is there.
The best chance in this whole forecast is shaping up for Tuesday the 8th of September. Tuesday morning, the wind goes light and onshore from the south-east at just 5 km/h. We’ve got a 1.6m swell from the ENE with a 9-second period. The wave comment is the best we’ve seen—a 2 out of 10. With that glassy wind, that early session on the reef could actually offer a few clean ones. It’s the shining light in an otherwise gloomy period.
So, to sum it up: the first week is mostly a washout from the wind. There’s a glimmer of hope in the second week with some proper long-period swell, but the cleanest window looks to be that Tuesday morning. The water’s warm, right around average for the year.
Keep your eyes on the 8th. Rusty.
Short Range ForecastMostly dry. Warm (max 27°C on Mon afternoon, min 25°C on Mon night). Mainly strong winds. | Days 5-7 Weather SummaryMostly dry. Warm (max 26°C on Sun morning, min 25°C on Thu afternoon). Mainly strong winds. | |||||||||||||||||||
Mon 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | Friday 28 | Saturday 29 | Sunday 30 | ||||||||||||||
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) | E 7 | E 8 | E 7 | E 7 | E 7 | SSW 14 | S 18 | S 19 | S 17 | S 16 | S 16 | S 14 | S 14 | S 13 | ENE 6 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 |
Wave Graph | ||||||||||||||||||||
295 | 286 | 393 | 262 | 289 | 218 | 307 | 458 | 861 | 427 | 590 | 260 | 329 | 225 | 261 | 230 | 230 | 222 | 236 | 315 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross | cross-on | cross | cross-on | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross-on | cross | cross | cross-on |
High Tide | 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 | 4:17PM0.51m | ||||||||
Low Tide | 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 | 10:34AM0.14m | 10:56PM0.04m | |||||||
— | — | 6:11 | — | — | 6:11 | — | — | 6:11 | — | — | 6:11 | — | — | 6:13 | — | — | 6:13 | — | — | |
6:52 | — | — | 6:52 | — | — | 6:52 | — | — | 6:51 | — | — | 6:50 | — | — | 6:49 | — | — | 6:47 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 27 | 26 | 26 | 26 | 26 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 26 | 26 | 25 |
Feels °C | 26 | 26 | 23 | 23 | 24 | 21 | 21 | 21 | 22 | 22 | 23 | 22 | 22 | 21 | 22 | 21 | 22 | 24 | 23 | 23 |
Swell 1 Height (m) Direction Period (s) | E 7 | 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 14 | E 13 | E 12 | E 12 | E 11 | SSW 15 |
295 | 129 | 85 | 196 | 121 | 215 | 307 | 458 | 861 | 427 | 590 | 260 | 329 | 225 | 179 | 222 | 144 | 101 | 91 | 199 | |
Swell 2 Height (m) Direction Period (s) | SSW 13 | SSE 7 | SSW 16 | SSW 12 | SSW 12 | SSW 18 | SSW 12 | SSW 13 | NNE 8 | S 12 | NNE 7 | E 16 | E 15 | E 14 | S 13 | S 13 | SSW 17 | SSW 16 | SSW 16 | S 11 |
156 | 28 | 146 | 81 | 81 | 107 | 45 | 98 | 7 | 73 | 10 | 77 | 155 | 200 | 85 | 89 | 188 | 171 | 162 | 58 | |
Swell 3 Height (m) Direction Period (s) | SSE 12 | SSW 17 | SSE 12 | SSE 6 | SSW 18 | S 21 | SSW 13 | SSW 16 | WNW 10 | NNE 8 | E 17 | SSW 11 | SSW 19 | SW 19 | S 13 | S 12 | SSW 12 | S 12 | S 12 | E 11 |
48 | 94 | 48 | 8 | 109 | 79 | 59 | 50 | 9 | 7 | 53 | 22 | 36 | 56 | 89 | 75 | 47 | 68 | 100 | 59 | |
Wind waves Height (m) Direction Period (s) | ENE 7 | E 8 | E 7 | E 7 | E 7 | ENE 6 | ENE 6 | E 6 | E 6 | ENE 6 | ENE 6 | ENE 6 | ENE 6 | ENE 6 | ENE 6 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 |
175 | 286 | 393 | 262 | 289 | 218 | 153 | 247 | 165 | 135 | 126 | 145 | 192 | 207 | 261 | 230 | 230 | 222 | 236 | 315 | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 56 | 49 | 56 | 56 | 49 | 56 | 51 | 18 | 49 | 109 | 20 | 49 | 51 | 49 | 56 | 56 | 49 | 49 | 56 | 50 |
Best forecast wave conditions in Oahu | ||||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||||
Header Global | ||||||||||||||||||||
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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.











