Surf Forecasts:
Irmas/Leftpoint surf forecast from 30 Aug 2026:
- Most powerful swell: Friday 4 Sep, 11PM (local time) - 13ft (4.0m), 9s period, E swell with 2,771 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 4.0m 9s and forecast to arrive on Friday (Sep 04) at 11PM. 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 | 11PM (Fri 4th Sep) | 13ft (4.0m) 9s |
Table - best surf conditions forecast for Irmas/Leftpoint over the next 16 days.
The Lowdown
Alright, grab your coffee, let’s get into it. The forecast here for our little patch of coast is a bit of a tough one. We’ve only got one break on the menu – Irmas/Leftpoint – and the first week is pretty much a write-off. Strong cross-shore winds and lumpy, messy surf are the name of the game right from the start.
Sunday the 30th of August kicks things off, but I wouldn't bother paddling out. It’s clear skies, but the wind is howling out of the ENE at 25 mph, cross-on, chopping up that 7 ft swell with a short, weak period of just 7 seconds. The wave energy is up there at 696 (moderate), but it’s all blown-out junk. This pattern of fresh to strong cross-shore breezes and poor conditions holds right through the following week. The swell jumps on Friday the 4th of September, hitting 8 ft to 8 ft with ENE winds still over 25 mph, but it’s just messy and strong. That 1076 to 1095 wave energy (moderate to strong) is all wasted.
We do get a few days where the consistency and swell direction match the optimum for this reef – which is ESE. On Wednesday the 9th of September, we’ve got a solid 12 ft swell from the ENE, with a period of 10 seconds. Combined energy is a powerful 2340 (very strong). The wind is lighter – a gentle cross-shore breeze at 9 mph. However, that swell size is edging into expert territory, and with the ENE direction, it’s still cross-on at times, leaving the surface a little bumpy. This is the best of a rough bunch, but it’s more of a "watch and see" than a "call in sick" day.
Later, on Thursday the 10th of September, we get an interesting shift. The wind goes light, turning onshore from the ESE at just 3 mph, with a 8 ft ENE swell. The wave energy is still high at 1242 (strong), but it’s a bit more organised. It’s a marginal day – worth a look if you’re desperate.
Overall, it’s a lean run. The worst part is that first whole week, from the 30th of August right through to the 6th of September, where it’s really just cross-shore chop. After that, we get a couple of slightly better windows, but nothing to write home about.
- 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 SummaryLight rain (total 7mm), mostly falling on Fri night. Warm (max 26°C on Wed morning, min 25°C on Wed night). Winds increasing (fresh winds from the ENE on Wed morning, near gales from the ENE by Fri night). | ||||||||||||||||||||
Sunday 30 | Monday 31 | Tuesday 1 | Wednesday 2 | Thursday 3 | Friday 4 | Saturday 5 | |||||||||||||||
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 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | S 16 | S 16 | S 15 | ENE 7 | ENE 7 | ENE 8 | ENE 8 | ENE 9 | E 9 | ENE 9 | ENE 8 | ENE 8 |
Wave Graph  | |||||||||||||||||||||
 kJ | 419 | 397 | 256 | 397 | 471 | 439 | 475 | 454 | 654 | 422 | 401 | 327 | 314 | 485 | 706 | 1267 | 2103 | 2371 | 1135 | 827 | 534 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross | cross-on | cross-on | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross-on | cross-on | cross-on | cross-on |
High Tide | 4:17PM0.51m | 5:19AM0.53m | 4:46PM0.43m | 6:14AM0.56m | 5:18PM0.36m | 7:19AM0.59m | 5:54PM0.28m | 8:36AM0.61m | 7:01PM0.22m | 9:55AM0.64m | 9:27PM0.19m | 11:03AM0.68m | 11:10PM0.21m | ||||||||
Low Tide | 10:34AM0.14m | 10:56PM0.04m | 11:35AM0.19m | 11:23PM0.04m | 12:53PM0.23m | 11:56PM0.04m | 2:47PM0.24m | 00:39AM0.05m | 5:18PM0.21m | 1:39AM0.06m | 6:33PM0.16m | 3:03AM0.07m | 7:10PM0.12m | 4:28AM0.06m | |||||||
 | |  | | | | | | | | | | | |  |  | |  |  | |  | |
 | 6:13 | — | — | 6:13 | — | — | 6:13 | — | — | 6:13 | — | — | 6:13 | — | — | 6:13 | — | — | 6:15 | — | — |
 | — | 6:47 | — | — | 6:46 | — | — | 6:45 | — | — | 6:45 | — | — | 6:45 | — | — | 6:44 | — | — | 6:43 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 7 | 4 | 2 | 3 |
Temp °C | 26 | 26 | 26 | 25 | 25 | 25 | 25 | 26 | 25 | 26 | 26 | 26 | 25 | 25 | 25 | 25 | 25 | 25 | 26 | 27 | 27 |
Feels °C | 23 | 23 | 24 | 21 | 22 | 21 | 22 | 24 | 22 | 24 | 24 | 25 | 21 | 21 | 20 | 19 | 19 | 19 | 25 | 29 | 27 |
Swell 1 Height (m) Direction Period (s) | SSW 16 | S 12 | SSW 15 | SSW 15 | SSW 14 | S 19 | SSW 18 | S 18 | S 17 | S 16 | S 16 | S 15 | S 14 | S 14 | S 13 | S 13 | S 13 | SSE 12 | ENE 9 | ENE 8 | ENE 8 |
| kJ | 171 | 100 | 199 | 146 | 138 | 192 | 329 | 314 | 364 | 422 | 401 | 275 | 268 | 195 | 176 | 128 | 121 | 184 | 1135 | 827 | 534 |
Swell 2 Height (m) Direction Period (s) | S 12 | SSW 16 | S 11 | S 11 | S 11 | S 10 | S 10 | S 12 | S 10 | E 14 | SSE 11 | E 13 | E 13 | E 12 | E 12 | SW 18 | SW 13 | SSW 13 | SSE 9 | S 7 | E 12 |
| kJ | 44 | 162 | 59 | 82 | 55 | 50 | 29 | 77 | 35 | 36 | 39 | 123 | 112 | 103 | 103 | 12 | 27 | 57 | 391 | 127 | 374 |
Swell 3 Height (m) Direction Period (s) | SSW 12 | S 20 | ENE 10 | E 10 | SSW 19 | SSW 14 | SW 14 | SW 14 | SW 14 | SSE 10 | E 14 | S 11 | SSE 10 | S 10 | E 15 | SE 16 | SSW 13 | SSW 20 | E 13 | E 13 | S 6 |
| kJ | 47 | 30 | 35 | 48 | 122 | 80 | 51 | 52 | 51 | 19 | 65 | 58 | 33 | 17 | 17 | 11 | 17 | 37 | 215 | 330 | 36 |
Wind waves Height (m) Direction Period (s) | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 7 | ENE 7 | ENE 7 | ENE 8 | ENE 8 | ENE 9 | E 9 | — | — | — |
| kJ | 419 | 397 | 256 | 397 | 471 | 439 | 475 | 454 | 654 | 402 | 354 | 327 | 314 | 485 | 706 | 1267 | 2103 | 2371 | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 56 | 58 | 49 | 56 | 56 | 49 | 49 | 109 | 22 | 49 | 56 | 49 | 60 | 220 | 218 | 217 | 218 | 112 | 41 | 6 | 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.
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