
Surf Forecasts:
Irmas/Leftpoint surf forecast from 7 Sep 2026:
- Most powerful swell: Tuesday 8 Sep, 2AM (local time) - 10ft (3.0m), 13s period, SSW swell with 3,478 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 3.0m 13s and forecast to arrive on Tuesday (Sep 08) at 2AM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 3.0m 14s period and expected on Monday (Sep 07) at 11PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 2AM (Tue 8th Sep) | 10ft (3.0m) 13s |
Table - best surf conditions forecast for Irmas/Leftpoint over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s have a look at what’s on the table for the next stretch.
Right off the bat, I’ve gotta be straight with you – this is a tough run. We’re looking at a long, dry spell before anything even worth paddling out for. For the next week and a half, the conditions are pretty much a write-off at Irmas/Leftpoint. We’ve got fresh cross and cross-onshore winds blowing into a decent-sized but messy swell, and the water temp is sitting at a normal 81° for this time of year, so at least you won’t be cold while you’re getting worked. The combined energy is strong – hitting up to 2887 (moderate to strong wave energy) on Sunday the 6th – but with that wind, it’s just a lumpy, choppy mess. You’ll see days with 7 ft to 8 ft of swell from the ENE, but with a period of 12 seconds, it’s got some power. Problem is, that cross-shore wind is ruining any chance of a clean face. It’s not worth your time until we get a big shift.
We’ve got a solid gap here – nothing really worth shouting about until we hit Saturday the 19th of September. That’s the first true standout. The morning of the 19th, things go glassy. Flat calm. A light 3 ft swell from the SSW with a very long period of 15 seconds – that’s groundswell, folks. For a reef setup like Irmas/Leftpoint, that long period will wrap in nicely and hold shape. The combined energy is still decent at 482 (moderate). This is the window. It’s not huge, but it’ll be clean and rideable. The only thing is, this spot can get crowds sometimes, so don’t expect to have it to yourself.
Then Sunday the 20th morning, another glassy spell with 4 ft from the east at an 8-second period. It’s a shorter period, so it’ll be a bit more crumbly, but clean conditions can save almost anything. The energy is 409 (moderate). A solid morning session for anyone who’s been waiting.
Wind stays light through the 21st, but we’re losing size and the wind swings a bit onshore. Still, with a few glassy mornings earlier in the week, that’s your pick.
Overall, this forecast is a long waiting game. The first week and a half is a total no-go. Don’t bother. Hold out for the 19th and 20th – that’s when it turns on. It’s not huge, but clean and lined up is better than big and blown out.
Stay patient, and keep an eye on the sky.
Rusty.
Short Range ForecastHeavy rain (total 35mm), heaviest during Sun night. Warm (max 27°C on Mon afternoon, min 24°C on Sun night). Winds decreasing (strong winds from the SSE on Mon night, light winds from the SE by Tue night). | Days 5-7 Weather SummaryMostly dry. Warm (max 27°C on Wed afternoon, min 25°C on Wed night). Winds decreasing (fresh winds from the ENE on Thu morning, light winds from the ESE by Sat morning). | |||||||||||||||||||
Sun 6 | Monday 7 | Tuesday 8 | Wednesday 9 | Thursday 10 | Friday 11 | Saturday 12 | ||||||||||||||
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 12 | ENE 12 | ENE 12 | E 12 | SSW 13 | ENE 11 | ENE 11 | ENE 10 | SSW 14 | SSW 13 | ENE 7 | ENE 7 | SSW 18 | ENE 7 | ENE 7 | ENE 11 | ENE 11 | ENE 10 | ENE 10 | ENE 10 |
Wave Graph | ||||||||||||||||||||
1316 | 1590 | 1845 | 956 | 3478 | 973 | 732 | 394 | 269 | 257 | 261 | 297 | 229 | 209 | 229 | 356 | 452 | 255 | 209 | 154 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-on | cross-on | cross-on | on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross | cross | cross | cross | cross-on | cross-on | cross-on | cross-on |
High Tide | 00:14AM0.26m | 12:48PM0.73m | 1:03AM0.31m | 1:30PM0.72m | 1:48AM0.38m | 2:07PM0.69m | 2:29AM0.44m | 2:41PM0.65m | 3:11AM0.50m | 3:13PM0.59m | 3:51AM0.55m | 3:42PM0.51m | 4:32AM0.57m | |||||||
Low Tide | 7:41PM0.09m | 5:40AM0.04m | 8:09PM0.07m | 6:40AM0.03m | 8:36PM0.05m | 7:34AM0.03m | 9:01PM0.04m | 8:25AM0.05m | 9:26PM0.04m | 9:14AM0.08m | 9:49PM0.03m | 10:05AM0.12m | 10:11PM0.04m | |||||||
— | — | 6:15 | — | — | 6:15 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | |
6:42 | — | — | 6:40 | — | — | 6:39 | — | — | 6:38 | — | — | 6:37 | — | — | 6:37 | — | — | 6:36 | — | |
mm | 3 | 14 | 5 | 3 | 8 | 2 | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 26 | 25 | 26 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 26 | 26 | 25 | 25 | 25 | 26 | 25 | 26 | 26 | 26 |
Feels °C | 26 | 24 | 25 | 28 | 27 | 25 | 27 | 30 | 31 | 29 | 27 | 24 | 23 | 23 | 23 | 24 | 23 | 29 | 28 | 28 |
Swell 1 Height (m) Direction Period (s) | ENE 12 | ENE 12 | SW 11 | E 12 | SSW 13 | ENE 11 | ENE 11 | ENE 10 | ENE 8 | ENE 8 | E 12 | E 12 | E 12 | E 11 | ENE 7 | ENE 11 | ENE 11 | NE 8 | ENE 10 | ENE 10 |
1316 | 1590 | 380 | 956 | 3478 | 973 | 732 | 394 | 207 | 217 | 199 | 141 | 134 | 123 | 229 | 356 | 452 | 74 | 209 | 154 | |
Swell 2 Height (m) Direction Period (s) | SSW 12 | SSW 14 | SSW 17 | ENE 7 | ENE 12 | WSW 10 | W 9 | SSW 8 | SSW 14 | SSW 13 | SSW 13 | SSW 13 | SSW 13 | SW 16 | SW 16 | SW 15 | SW 15 | SW 15 | NE 9 | NNE 8 |
563 | 1095 | 486 | 227 | 1455 | 410 | 235 | 147 | 269 | 257 | 178 | 133 | 93 | 271 | 208 | 232 | 226 | 242 | 75 | 92 | |
Swell 3 Height (m) Direction Period (s) | SSW 19 | SSW 18 | SSE 7 | SW 12 | SSW 15 | SSW 15 | SSW 14 | SSW 14 | E 13 | E 13 | S 7 | SSW 16 | SSW 18 | SW 11 | SW 10 | NNE 7 | SW 9 | SW 8 | SSW 16 | SSW 13 |
197 | 263 | 52 | 580 | 500 | 498 | 371 | 356 | 219 | 215 | 24 | 181 | 211 | 71 | 60 | 47 | 20 | 11 | 99 | 68 | |
Wind waves Height (m) Direction Period (s) | ENE 12 | — | ENE 12 | — | SSE 8 | SSW 9 | SSW 8 | — | — | — | ENE 7 | ENE 7 | ENE 7 | ENE 7 | — | ENE 11 | — | ENE 10 | — | — |
811 | — | 1845 | — | 308 | 826 | 389 | — | — | — | 261 | 297 | 229 | 209 | — | 230 | — | 255 | — | — | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 56 | 4 | 131 | 41 | 61 | 108 | 4 | 2 | 6 | 6 | 18 | 49 | 18 | 20 | 49 | 49 | 18 | 4 | 6 | 6 |
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.










