Surf Forecasts:
Irmas/Leftpoint surf forecast from 2 Sep 2026:
- Most powerful swell: Tuesday 8 Sep, 5PM (local time) - 15ft (4.5m), 13s period, SSW swell with 6,850 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 4.5m 13s and forecast to arrive on Tuesday (Sep 08) at 5PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 4.5m 14s period and expected on Tuesday (Sep 08) at 2PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 5PM (Tue 8th Sep) | 15ft (4.5m) 13s |
Table - best surf conditions forecast for Irmas/Leftpoint over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s get stuck into the outlook for the next couple of weeks.
Right off the bat, I gotta be honest with you – it’s a tough stretch. The only break on the cards is Irmas/Leftpoint and for the first week and a half, it’s a real grind. The wind is a persistent problem. For the first five days, we’re looking at a strong cross-shore breeze from the ENE, howling at 25 mph, just wrecking the surface. It’s messy out there, pure and simple. The swell is running around 7 ft to 8 ft but it’s short-period, wind-chop energy, so it doesn’t matter much. The combined wave energy is moderate to strong (1066 to 1648), but with that wind, you’re just fighting a losing battle.
We get a bit of a shift from Saturday the 5th through to Monday the 7th, but it’s only marginal. The wind drops slightly to a fresh breeze, still cross-shore, and the swell pushes up a bit, with a longer period hitting 13-14 seconds, bringing some real energy (up to 2699). That’s a groundswell, and it’s got potential but the cross-chop and lumpy conditions will keep it from being clean. Tuesday the 8th is a write-off, with a huge spike in swell (over 15 ft and energy over 8000) but a near-gale onshore wind. That’s more of a kite-surfing setup than a surf one.
The real standout, and the only time I’d get excited, is way out there. Monday the 14th of September. The morning is still a bit meh, but on the Monday afternoon the wind goes glassy. Absolutely glassy. The swell drops to a tiny 2 ft, but it’s a long-period groundswell from the SSW at 24 seconds. That’s a very long period. The combined energy is moderate (581), and the water temp is a warm 81°, which is about average for this time of year. Now, for a reef break like Irmas/Leftpoint, that long-period swell is a dream scenario. It’ll wrap in and offer up some clean, lined-up waves. The waves will be small, so it’s not a day for the big-wave crew, but for a glassy, fun session, that’s the only window. Just be aware, crowds are possible here.
After that, it’s back to marginal conditions with cross-on breezes and lumpy surf through to the end of the 16-day window. Nothing else worth chasing.
Rusty out.
Short Range ForecastSome drizzle, heaviest during Wed morning. Warm (max 26°C on Wed afternoon, min 25°C on Wed morning). Mainly strong winds. | Days 4-6 Weather SummaryModerate rain (total 19mm), heaviest on Sun night. Warm (max 27°C on Mon night, min 23°C on Sun night). Winds increasing (light winds from the SE on Sun night, strong winds from the SE by Mon night). | ||||||||||||||||||||
Wednesday 2 | Thursday 3 | Friday 4 | Saturday 5 | Sunday 6 | Monday 7 | Tuesday 8 | |||||||||||||||
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 8 | ENE 8 | ENE 8 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | E 14 | E 13 | ENE 14 | ENE 13 | ENE 13 | ENE 12 | ENE 12 | ENE 12 | ENE 13 | ENE 13 | ENE 12 | ENE 11 | SSW 13 | SSW 10 |
Wave Graph  | |||||||||||||||||||||
 kJ | 589 | 549 | 749 | 482 | 758 | 639 | 558 | 678 | 690 | 2019 | 1674 | 1581 | 1405 | 1220 | 1324 | 1671 | 1886 | 1807 | 1184 | 6850 | 1275 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross | cross-on | cross | cross | cross-on | cross | cross | cross | cross | cross | cross | cross | cross | cross-on | cross | cross | cross-on | on | cross-on | on |
High Tide | 5:54PM0.28m | 8:36AM0.61m | 7:01PM0.22m | 9:55AM0.64m | 9:27PM0.19m | 11:03AM0.68m | 11:10PM0.21m | 12:00PM0.71m | 00:14AM0.26m | 12:48PM0.73m | 1:03AM0.31m | 1:30PM0.72m | 1:48AM0.38m | ||||||||
Low Tide | 2:47PM0.24m | 00:39AM0.05m | 5:18PM0.21m | 1:39AM0.06m | 6:33PM0.16m | 3:03AM0.07m | 7:10PM0.12m | 4:28AM0.06m | 7:41PM0.09m | 5:40AM0.04m | 8:09PM0.07m | 6:40AM0.03m | 8:36PM0.05m | ||||||||
 |  |  |  | | | | | | | |  | | |  |  |  | | | | | |
 | 6:13 | — | — | 6:13 | — | — | 6:13 | — | — | 6:15 | — | — | 6:15 | — | — | 6:15 | — | — | 6:15 | — | — |
 | — | 6:45 | — | — | 6:45 | — | — | 6:44 | — | — | 6:43 | — | — | 6:42 | — | — | 6:40 | — | — | 6:39 | — |
mm | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | 6 | 3 | 5 | 5 | 3 | 3 | 5 |
Temp °C | 25 | 26 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 26 | 25 | 26 | 26 | 26 | 25 | 25 | 27 | 27 | 27 | 27 |
Feels °C | 23 | 23 | 22 | 22 | 21 | 21 | 21 | 21 | 21 | 22 | 24 | 23 | 25 | 25 | 26 | 24 | 25 | 25 | 23 | 25 | 28 |
Swell 1 Height (m) Direction Period (s) | S 16 | S 16 | S 15 | SSE 13 | SSE 12 | S 12 | S 12 | E 14 | E 13 | S 12 | S 12 | ENE 13 | ENE 12 | ENE 12 | ENE 12 | ENE 13 | SW 14 | SW 14 | SW 15 | ENE 11 | E 8 |
| kJ | 422 | 401 | 275 | 206 | 344 | 439 | 505 | 678 | 690 | 625 | 736 | 1581 | 1405 | 1220 | 1324 | 1671 | 1115 | 1956 | 6963 | 604 | 277 |
Swell 2 Height (m) Direction Period (s) | E 14 | E 14 | E 13 | E 13 | S 14 | E 14 | E 13 | S 12 | S 13 | NNE 10 | NNE 10 | SSW 12 | SSW 12 | SSW 12 | SSW 12 | SW 12 | SSW 17 | S 10 | ENE 11 | SSW 15 | WSW 10 |
| kJ | 36 | 66 | 167 | 160 | 103 | 412 | 426 | 472 | 620 | 20 | 32 | 793 | 614 | 830 | 669 | 646 | 510 | 188 | 1184 | 462 | 363 |
Swell 3 Height (m) Direction Period (s) | SSE 10 | S 11 | S 11 | S 15 | E 16 | SW 18 | SW 12 | SW 13 | NNE 11 | NNE 10 | NNE 10 | SSE 10 | SSW 16 | S 19 | SSW 18 | SSW 16 | S 9 | SSW 16 | SSW 14 | E 14 | SSW 14 |
| kJ | 19 | 37 | 37 | 209 | 79 | 12 | 6 | 7 | 12 | 35 | 32 | 19 | 425 | 176 | 340 | 454 | 87 | 416 | 449 | 181 | 265 |
Wind waves Height (m) Direction Period (s) | ENE 8 | ENE 8 | ENE 8 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 14 | ENE 13 | ENE 13 | — | NNE 6 | — | — | ENE 13 | ENE 12 | — | SSW 13 | SSW 10 |
| kJ | 589 | 549 | 749 | 482 | 758 | 639 | 558 | 498 | 498 | 2019 | 1674 | 812 | — | 26 | — | — | 1886 | 1807 | — | 6850 | 1275 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 56 | 56 | 64 | 110 | 112 | 56 | 56 | 109 | 51 | 49 | 109 | 22 | 20 | 49 | 6 | 18 | 18 | 107 | 108 | 97 | 43 |
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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