Surf Forecasts:
Irmas/Leftpoint surf forecast from 28 Aug 2026:
- Most powerful swell: Friday 28 Aug, 2AM (local time) - 3.5ft (1.1m), 16s period, S swell with 590 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 1.1m 16s and forecast to arrive on Friday (Aug 28) at 2AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 17s period and expected on Saturday (Aug 29) at 11PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 2AM (Fri 28th Aug) | 3.5ft (1.1m) 16s |
Table - best surf conditions forecast for Irmas/Leftpoint over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s get into it.
Right off the bat, I gotta be straight with you – the first week and a half is a write-off. Strong, persistent cross-shore winds from the ENE just trash everything at Irmas/Leftpoint. Even when the swell bumps up to 7ft, it’s messy, lumpy, and just not worth paddling out for. The combined wave energy sits in the moderate range, but the wind makes it a total battle. You’ll be fighting chop, not riding waves. The water temp is about average for this time of year, so no surprises there.
We finally get a glimmer of hope on Monday, September 7th. The morning session looks like the real standout of the whole 16-day window. A clean 3ft groundswell from the SSW, with a very long 16-second period, and a light, cross-offshore breeze from the NNE. That’s a recipe for clean, lined-up waves at this reef break. The combined energy is strong, which backs up the power in the water. The optimum direction for this spot is ESE, so this SSW swell isn’t perfect, but the long period and clean conditions will still make for a fun morning. Later that afternoon, the swell shifts back to a messy ENE, so get your session in early.
The rest of the second week is a mixed bag. The surf picks up in size, with 7ft+ ENE swell, but the wind stays cross-shore, keeping things lumpy. The energy climbs into the strong range, so there’s push, but the quality just isn’t there for a clean ride. The window of Monday, September 7th morning is the only true highlight. If you’re a solid intermediate, you can find some fun on the 10th and 11th when the swell is 7ft to 8ft and the wind drops to a light breeze, but it’s still cross-shore, so don’t expect perfection.
Rusty, signing off.
Short Range ForecastMostly dry. Warm (max 26°C on Sat afternoon, min 25°C on Thu night). Mainly strong winds. | Days 5-7 Weather SummaryMostly dry. Warm (max 26°C on Mon morning, min 25°C on Sun night). Mainly fresh winds. | ||||||||||||||||||
Friday 28 | Saturday 29 | Sunday 30 | Monday 31 | Tuesday 1 | Wednesday 2 | ||||||||||||||
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 16 | S 14 | S 14 | S 13 | ENE 6 | ENE 6 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | S 17 | S 16 | ENE 8 | ENE 8 |
Wave Graph  | |||||||||||||||||||
 kJ | 590 | 260 | 329 | 229 | 219 | 252 | 360 | 362 | 285 | 298 | 395 | 471 | 459 | 412 | 444 | 394 | 422 | 372 | 422 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross | cross | cross-on | cross | cross | cross-on | cross | cross-on | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross-on |
High Tide | 3:07AM0.39m | 3:21PM0.62m | 3:47AM0.44m | 3:48PM0.58m | 4:31AM0.49m | 4:17PM0.51m | 5:19AM0.53m | 4:46PM0.43m | 6:14AM0.56m | 5:18PM0.36m | 7:19AM0.59m | 5:54PM0.28m | |||||||
Low Tide | 9:49PM0.07m | 8:57AM0.06m | 10:10PM0.06m | 9:43AM0.10m | 10:32PM0.05m | 10:34AM0.14m | 10:56PM0.04m | 11:35AM0.19m | 11:23PM0.04m | 12:53PM0.23m | 11:56PM0.04m | 2:47PM0.24m | 00:39AM0.05m | ||||||
 |  | | | | | | | | | | | | | | | | |  | |
 | — | 6:11 | — | — | 6:13 | — | — | 6:13 | — | — | 6:13 | — | — | 6:13 | — | — | 6:13 | — | — |
 | 6:51 | — | 6:50 | — | — | 6:49 | — | — | 6:47 | — | — | 6:46 | — | — | 6:45 | — | — | 6:45 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 3 |
Temp °C | 25 | 25 | 25 | 25 | 25 | 26 | 25 | 25 | 26 | 25 | 26 | 26 | 25 | 26 | 26 | 26 | 26 | 26 | 25 |
Feels °C | 22 | 23 | 22 | 22 | 21 | 23 | 22 | 21 | 23 | 22 | 23 | 23 | 22 | 25 | 24 | 25 | 25 | 24 | 23 |
Swell 1 Height (m) Direction Period (s) | S 16 | S 14 | S 14 | S 13 | E 13 | E 12 | E 12 | SSW 16 | S 12 | SSW 15 | SSW 15 | SSW 14 | S 19 | SSW 18 | S 18 | S 17 | S 16 | S 16 | S 15 |
| kJ | 590 | 260 | 329 | 229 | 171 | 106 | 104 | 171 | 100 | 199 | 144 | 138 | 192 | 329 | 314 | 364 | 422 | 318 | 279 |
Swell 2 Height (m) Direction Period (s) | NNE 7 | E 16 | E 15 | E 14 | S 13 | S 13 | SSW 17 | E 11 | SSW 16 | S 11 | S 11 | S 11 | S 10 | SSW 14 | S 12 | S 12 | E 15 | E 14 | E 13 |
| kJ | 9 | 78 | 155 | 195 | 85 | 89 | 188 | 64 | 162 | 84 | 82 | 55 | 51 | 78 | 77 | 73 | 74 | 148 | 173 |
Swell 3 Height (m) Direction Period (s) | E 17 | SSW 11 | SSW 19 | SW 19 | S 13 | S 12 | S 12 | SSE 12 | E 11 | ENE 10 | SSW 18 | SSW 19 | SSW 14 | S 10 | SW 14 | SW 14 | SW 14 | SSE 11 | SSE 11 |
| kJ | 53 | 22 | 36 | 56 | 89 | 75 | 47 | 47 | 61 | 35 | 64 | 122 | 79 | 29 | 51 | 51 | 31 | 23 | 38 |
Wind waves Height (m) Direction Period (s) | E 6 | ENE 6 | ENE 6 | ENE 6 | ENE 6 | ENE 6 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 |
| kJ | 267 | 139 | 137 | 188 | 219 | 252 | 360 | 362 | 285 | 298 | 395 | 471 | 459 | 412 | 444 | 394 | 382 | 372 | 422 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 56 | 49 | 109 | 49 | 56 | 60 | 56 | 50 | 60 | 49 | 56 | 56 | 49 | 49 | 56 | 49 | 49 | 49 | 49 |
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.
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