Surf Forecasts:
Irmas/Leftpoint surf forecast from 26 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 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 | 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 get this out there. It’s Rusty here, and I’m looking at the next couple of weeks for Irmas/Leftpoint. Gotta be straight with you – this is a long, tough stretch. The forecast is a real bummer, with a whole lot of nothing for a long time. We’re looking at a solid week and a half of poor conditions, so don’t go getting your hopes up too early.
Right now, Irmas/Leftpoint is the only show in town, and it's a reef break that's fairly consistent when it's on, but it needs a solid ESE swell to really work. The water’s sitting at 81°, which is pretty normal for this time of year, so no surprises there.
We kick off the first proper window on the morning of Thursday, 10th September. That’s the only time in the whole 16-day run that’s even worth a second look. We’ll have a 5ft swell coming from the east, with a period of 12 seconds. That’s a nice, long groundswell – it’ll have some punch and shape, perfect for a reef setup like this. The combined energy is a solid 1184 (moderate to strong), so there’s some power behind it. The wind is a light cross-onshore from the east at 9 mph, just a gentle breeze. It’s not perfect, but it’s manageable. The afternoon looks even better – the swell bumps up a touch to 5ft, still from the east, and the wind drops to a light cross-shore breeze at 6 mph. That’s the pick of the whole period: clean, glassy enough to get some good lines, and that long period swell will wrap nicely around the point. It’s a marginal forecast, but honestly, it’s the best we’ve got.
The crowd situation at Irmas can be a bit of a pain – it gets busy sometimes, but on a Thursday, you might luck out. The only downside is that swell over 5ft can be a bit much for beginners, and with that long period, it’ll be walling up. Better suited for the intermediate crew.
Now, for the bad news. Before that Thursday, the entire stretch from Wednesday, 26th August, right through to Wednesday, 9th September, is a total write-off. That’s nearly two weeks of cross-shore winds, lumpy chop, and weak, short-period slop. The swell is coming from the east or south, but the wind is a constant 15-22 mph cross-shore from the ENE, just trashing everything. The wave energy is all over the place, but the quality is just poor. There’s a day or two where the swell gets a bit bigger (up to 7ft on the 2nd of September), but with that cross-onshore wind, it’s just a messy, blown-out burger. Honestly, for a beach or reef setup, that’s more of a kite-surfing wind than a paddling day.
So, to wrap it up: there’s one, single day that shines – Thursday, 10th September at Irmas/Leftpoint. The afternoon is the standout. Everything else? Forget it. It’s a grim run, but hey, it tends not to stay this bad forever. Forecasts can change.
Rusty.
Short Range ForecastMostly dry. Warm (max 26°C on Wed morning, min 25°C on Wed morning). Mainly fresh winds. | Days 4-6 Weather SummarySome drizzle, heaviest during Mon night. Warm (max 26°C on Sun morning, min 25°C on Sat morning). Mainly fresh winds. | ||||||||||||||||||||
Wednesday 26 | Thursday 27 | Friday 28 | Saturday 29 | Sunday 30 | Monday 31 | Tuesday 1 | |||||||||||||||
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) | E 6 | S 18 | S 19 | S 17 | S 16 | S 16 | S 14 | S 14 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | NE 8 | ENE 8 | ENE 9 | ENE 8 | ENE 8 |
Wave Graph | |||||||||||||||||||||
235 | 307 | 458 | 861 | 427 | 590 | 260 | 329 | 332 | 349 | 408 | 317 | 330 | 244 | 222 | 243 | 371 | 551 | 444 | 423 | 488 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross | cross | cross | cross-on | cross | cross | cross-on | cross | cross | cross | cross-on | cross | cross-on | cross | cross | cross | cross-on | cross | cross-on |
High Tide | 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 | 5:19AM0.53m | 4:46PM0.43m | 6:14AM0.56m | 5:18PM0.36m | ||||||||
Low Tide | 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 | 11:35AM0.19m | 11:23PM0.04m | 12:53PM0.23m | 11:56PM0.04m | ||||||||
6:11 | — | — | 6:11 | — | — | 6:11 | — | — | 6:13 | — | — | 6:13 | — | — | 6:13 | — | — | 6:13 | — | — | |
— | 6:52 | — | — | 6:51 | — | — | 6:50 | — | — | 6:49 | — | — | 6:47 | — | — | 6:46 | — | — | 6:45 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | — | — | 3 |
Temp °C | 26 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 26 | 26 | 25 | 26 | 26 | 26 | 26 | 26 | 26 |
Feels °C | 23 | 21 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 21 | 21 | 22 | 23 | 23 | 23 | 24 | 25 | 26 | 26 | 26 | 26 |
Swell 1 Height (m) Direction Period (s) | SSW 14 | S 18 | S 19 | S 17 | S 16 | 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 10 | SSW 18 | S 18 | S 17 |
215 | 307 | 458 | 861 | 427 | 590 | 260 | 329 | 225 | 171 | 108 | 104 | 171 | 100 | 199 | 144 | 138 | 50 | 329 | 311 | 273 | |
Swell 2 Height (m) Direction Period (s) | SSW 18 | SSW 12 | SSW 13 | WNW 10 | SSW 12 | 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 19 | S 10 | S 12 | S 10 |
107 | 45 | 98 | 9 | 47 | 9 | 78 | 155 | 195 | 85 | 89 | 186 | 64 | 162 | 59 | 57 | 55 | 192 | 46 | 75 | 32 | |
Swell 3 Height (m) Direction Period (s) | S 21 | SSW 13 | SSW 16 | N 8 | NNE 8 | E 17 | SSW 11 | SSW 19 | SW 19 | S 13 | S 12 | SSW 12 | SSE 12 | E 11 | ENE 10 | E 10 | E 9 | SW 14 | SSW 14 | SW 14 | SW 14 |
79 | 59 | 50 | 6 | 13 | 53 | 22 | 36 | 56 | 89 | 75 | 47 | 46 | 61 | 34 | 48 | 45 | 54 | 78 | 52 | 51 | |
Wind waves Height (m) Direction Period (s) | E 6 | E 6 | E 6 | ENE 6 | ENE 6 | ENE 6 | E 6 | ENE 6 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | NE 8 | ENE 8 | ENE 9 | ENE 8 | ENE 8 |
235 | 209 | 259 | 182 | 149 | 150 | 200 | 161 | 332 | 349 | 408 | 317 | 330 | 244 | 222 | 243 | 371 | 551 | 444 | 423 | 488 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 56 | 50 | 50 | 49 | 49 | 49 | 49 | 60 | 49 | 56 | 58 | 49 | 56 | 51 | 49 | 49 | 49 | 18 | 50 | 49 | 18 |
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.











