
Surf Forecasts:
Irmas/Leftpoint surf forecast from 13 Sep 2026:
- Most powerful swell: Thursday 17 Sep, 8PM (local time) - 8ft (2.4m), 10s period, ENE swell with 1,021 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 2.4m 10s and forecast to arrive on Thursday (Sep 17) at 8PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 18s period and expected on Wednesday (Sep 16) at 11AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 8PM (Thu 17th Sep) | 8ft (2.4m) 10s |
Table - best surf conditions forecast for Irmas/Leftpoint over the next 16 days.
The Lowdown
Alright, Rusty here. Let’s have a look at what’s on the cards for Irmas/Leftpoint over the next couple of weeks.
Right up front, I gotta be straight with you: this is a tough stretch. The outlook is poor for the entire sixteen-day run, starting from the 13th of September right through to the 28th. There are no standout sessions, no clean windows, and not a single day I’d get excited about paddling out. We’re looking at over two weeks with nothing to recommend, which is a real bummer for a spot that can be fairly consistent.
Let’s break it down. From Sunday the 13th through Wednesday the 16th of September, the swell is small – around 2ft to 4ft – but the wind is cranking from the ENE and NE at 12 to 22 mph, all cross-shore. The water’s churned up, and the combined energy sits between weak and moderate (274 to 989). On Wednesday afternoon, a 3ft, 18-second long-period groundswell from the SSW shows up, pushing the energy into strong territory (989), but that big period and strong cross-wind will make a mess of things at this reef setup – it’s a no-go.
Things get bigger but uglier from Thursday the 17th. Swell climbs to 7ft-8ft, mostly from the ENE and E, with periods of 7-10 seconds. But the wind is relentless: 16 to 25 mph, cross-shore or cross-onshore, and it’s lumpy, choppy, and messy. Strong cross-shore winds and big chop mean poor surf conditions right through the 25th. Wave energy is moderate to very strong (656 to 1290), but it’s all wasted on the wind.
The only slight flicker of hope shows up right at the end. On Saturday the 26th, morning sees 8ft from the ENE with a moderate breeze, but it’s cross-onshore and choppy. By the afternoon, the wind drops to 16 mph, still cross-shore, but the conditions are called “marginal” – a score of 2. The swell is still a heaving 8ft from the E, and the energy is very strong (1130). This is borderline expert territory, but the chop and cross-wind will still be a fight. Then on the 27th, the swell stays around 8ft but the wind is back up, and by Monday the 28th, it drops to 6ft with a light breeze (6 mph cross-shore), but the period is a short 7 seconds, and the conditions are still only marginal.
Honestly, folks, if you’re looking for clean, glassy surf, this isn’t it. With the constant cross-wind, lumpy chop, and messy conditions from a beach-and-reef setup, this stretch looks more interesting for kite surfing than paddle surfing. Don’t hold your breath.
Stay safe, and I’ll check back in when things look better.
Rusty
Short Range ForecastMostly dry. Warm (max 26°C on Tue morning, min 25°C on Sat night). Wind will be generally light. | Days 5-7 Weather SummaryModerate rain (total 11mm), heaviest on Thu night. Warm (max 26°C on Tue night, min 25°C on Wed night). Mainly strong winds. | ||||||||||||||||||
Sunday 13 | Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | ||||||||||||||
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) | NNE 9 | NNE 9 | NNE 9 | NE 9 | NE 8 | NE 8 | NE 8 | NE 8 | E 12 | SSW 19 | ENE 6 | SSW 18 | ENE 7 | ENE 8 | ENE 10 | ENE 9 | E 8 | ENE 8 | ENE 8 |
Wave Graph | |||||||||||||||||||
135 | 135 | 138 | 123 | 82 | 80 | 68 | 122 | 66 | 470 | 93 | 541 | 328 | 495 | 959 | 860 | 659 | 599 | 639 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross-on | cross-on | cross | cross-on |
High Tide | 4:32AM0.57m | 4:10PM0.44m | 5:15AM0.59m | 4:37PM0.37m | 6:02AM0.58m | 5:04PM0.30m | 6:56AM0.56m | 5:30PM0.25m | 8:04AM0.54m | 6:18PM0.21m | 9:21AM0.54m | 9:37PM0.19m | |||||||
Low Tide | 10:11PM0.04m | 10:58AM0.16m | 10:34PM0.05m | 11:57AM0.20m | 10:58PM0.06m | 1:10PM0.23m | 11:24PM0.09m | 2:59PM0.23m | 11:56PM0.11m | 5:49PM0.21m | 00:44AM0.14m | 6:28PM0.17m | 2:11AM0.15m | ||||||
— | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:18 | — | — | 6:18 | — | — | |
6:36 | — | 6:35 | — | — | 6:34 | — | — | 6:32 | — | — | 6:31 | — | — | 6:30 | — | — | 6:30 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 7 | 3 | 1 | — |
Temp °C | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 26 | 26 | 26 | 26 | 26 | 26 | 25 | 25 | 26 | 26 | 26 | 26 |
Feels °C | 24 | 25 | 24 | 24 | 24 | 23 | 24 | 26 | 26 | 26 | 25 | 24 | 25 | 23 | 22 | 25 | 25 | 25 | 25 |
Swell 1 Height (m) Direction Period (s) | NNE 9 | NNE 9 | NNE 9 | NE 9 | NE 8 | NE 8 | NE 8 | SW 20 | SW 20 | SSW 19 | SW 18 | SSW 18 | SW 17 | SSW 16 | SW 16 | SSW 18 | SSW 17 | SSW 17 | SSW 16 |
135 | 135 | 138 | 123 | 82 | 80 | 65 | 392 | 388 | 470 | 455 | 541 | 429 | 326 | 258 | 651 | 622 | 580 | 539 | |
Swell 2 Height (m) Direction Period (s) | ENE 9 | SW 15 | SSW 15 | SW 12 | SSW 14 | SW 22 | SW 21 | E 12 | NNE 8 | NNE 8 | E 10 | SW 11 | SW 11 | SSW 20 | SSW 19 | SSE 10 | SSE 9 | SSE 6 | SSE 6 |
84 | 107 | 84 | 38 | 77 | 227 | 224 | 46 | 52 | 32 | 72 | 31 | 19 | 152 | 210 | 9 | 9 | 3 | 14 | |
Swell 3 Height (m) Direction Period (s) | SSW 13 | SSW 12 | SW 12 | SW 15 | SSW 24 | SW 14 | SSW 13 | SW 13 | E 12 | E 11 | NNE 9 | S 8 | SSE 11 | SW 11 | SSW 10 | SW 10 | W 9 | S 21 | S 20 |
68 | 57 | 23 | 54 | 54 | 49 | 68 | 42 | 66 | 58 | 17 | 5 | 12 | 18 | 10 | 4 | 2 | 36 | 67 | |
Wind waves Height (m) Direction Period (s) | ENE 4 | ENE 9 | E 9 | E 4 | ENE 5 | ENE 5 | ENE 5 | NE 8 | ENE 5 | ENE 5 | ENE 6 | ENE 10 | ENE 7 | ENE 8 | ENE 10 | ENE 9 | E 8 | ENE 8 | ENE 8 |
16 | 82 | 54 | 12 | 31 | 25 | 27 | 122 | 34 | 60 | 93 | 443 | 328 | 495 | 959 | 860 | 659 | 599 | 639 | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 18 | 18 | 18 | 25 | 49 | 18 | 18 | 18 | 18 | 49 | 49 | 109 | 49 | 109 | 109 | 49 | 58 | 49 | 6 |
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.










