Surf Forecasts:
Irmas/Leftpoint surf forecast from 18 Aug 2026:
- Best quality surf: Thursday 20 Aug, 11PM (local time) - 2ft (0.6m), 16s period, SSW swell with cross-offshore winds.
- Most powerful swell: Monday 24 Aug, 8PM (local time) - 8ft (2.5m), 7s period, ENE swell with 724 kJ wave energy.
- Next surfable swell (1★+): Thursday 20 Aug, 11PM (local time) - 2ft (0.6m), 16s period with SSW swell.
Best Forecast Surf Conditions for Irmas/Leftpoint this week:
The surf forecast for Irmas/Leftpoint over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Thursday (Aug 20) at 11PM. The primary swell is predicted to be 0.6m and 16s period with a secondary swell of 1.1m and 7s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Irmas/Leftpoint in the next 16 days are 2.5m 7s and forecast to arrive on Monday (Aug 24) 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 0.7m 16s period and expected on Friday (Aug 21) at 2AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 11PM (Thu 20th Aug) | 2ft (0.6m) 16s |
| Best Surf | 11PM (Thu 20th Aug) | 2ft (0.6m) 16s |
| Most Powerful | 8PM (Mon 24th Aug) | 8ft (2.5m) 7s |
Table - best surf conditions forecast for Irmas/Leftpoint over the next 16 days.
The Lowdown
Alright, let's have a look at what's cookin' at Irmas/Leftpoint. It’s gonna be a tough stretch for the next 16 days, no two ways about it.
We got a gap right from the get-go with no real surf to talk about. It's a long, grim outlook. The wind is the real villain here – a relentless stream of ENE winds, 20 to 28 mph, blowing cross-shore or cross-onshore, just shredding the surface all day, every day.
Kicking off Monday, August 17th, we got 5ft of windswell, but that 19 mph breeze is making a right mess of it. The combined swell energy is moderate at 688, but you’d be fighting a losing battle against that bump. Water temp is around 80°F, about normal for this time of year.
And it just doesn't let up. For the next week, the size goes up and down, but that wind... it's brutal. Short-period chop under 8 seconds is all we're seeing. Even on Thursday the 20th, when we get a long-period 18-second pulse from the SSW, the swell is only 2ft and the wind is still on it. That kind of groundswell would be dreamy on a glassy day, but not like this.
As we push into the end of August, the swell really starts to pile in, but the wind just gets stronger. By Sunday the 23rd, we're looking at 6ft surf, but with a 22 mph cross-breeze, it's a lumpy, uninviting mess. The energy is strong at 531, but the quality is zero. From Monday the 24th onward, it’s just not for paddle surfing. The swell hits 7ft, then 8ft, with winds cranking up to 25 or 28 mph. Don't bother with your surfboard; this is a kite session if you're into that. The combined energy on the 27th is a massive 1537, but it’s all wind-affected chaos.
We get a slight reprieve in size right at the end, dropping to 4ft on the 31st, but the wind is still blowing 19 mph. It’s the same story all the way through. There is no standout day here, no hidden gem. The waves are going to be there, but they'll be ugly. It’s a long wait for a clean one, that's for sure.
Rusty.
Short Range ForecastMostly dry. Warm (max 26°C on Thu morning, min 24°C on Tue night). Mainly fresh winds. | Days 5-7 Weather SummaryMostly dry. Warm (max 26°C on Thu afternoon, min 24°C on Thu night). Winds increasing (light winds from the NE on Thu night, fresh winds from the ENE by Sat night). | |||||||||||||||||||
Mon 17 | Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | ||||||||||||||
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 | E 8 | E 8 | E 8 | SSW 18 | SSW 17 | NNE 7 | NNE 7 | NE 7 | SSW 16 | ENE 6 | ENE 6 | ENE 7 | ENE 7 | ENE 6 | ENE 7 |
Wave Graph  | ||||||||||||||||||||
 kJ | 268 | 203 | 176 | 167 | 191 | 135 | 107 | 80 | 207 | 202 | 40 | 40 | 77 | 322 | 119 | 165 | 349 | 295 | 245 | 326 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross | cross | cross-on | cross | cross | cross | cross | cross | cross | cross-on | cross | cross-on | cross | cross | cross | cross | cross | cross |
High Tide | 5:48PM0.38m | 7:56AM0.52m | 6:10PM0.31m | 9:08AM0.53m | 10:20AM0.55m | 8:45PM0.20m | 11:21AM0.57m | 10:59PM0.20m | 12:10PM0.60m | 00:02AM0.21m | 12:51PM0.62m | 00:45AM0.24m | ||||||||
Low Tide | 00:39AM0.07m | 2:59PM0.27m | 1:14AM0.09m | 2:00AM0.10m | 7:38PM0.20m | 3:06AM0.11m | 7:49PM0.17m | 4:20AM0.10m | 8:09PM0.14m | 5:23AM0.08m | 8:29PM0.12m | |||||||||
 |  | | | |  | | | | |  | | | | | | | | | | |
 | — | — | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — | 6:11 | — | — | 6:11 | — | — |
 | 6:59 | — | — | 6:58 | — | — | 6:57 | — | — | 6:57 | — | — | 6:55 | — | — | 6:54 | — | — | 6:53 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 25 | 25 | 25 | 25 | 25 | 24 | 25 | 25 | 26 | 26 | 25 | 25 | 26 | 26 | 26 | 26 | 25 | 25 | 25 | 25 |
Feels °C | 24 | 23 | 23 | 22 | 23 | 23 | 25 | 26 | 27 | 27 | 27 | 28 | 28 | 27 | 26 | 24 | 24 | 23 | 22 | 22 |
Swell 1 Height (m) Direction Period (s) | ENE 7 | S 13 | ENE 7 | S 13 | S 13 | E 8 | E 8 | E 8 | E 8 | ENE 7 | SW 16 | SW 17 | NE 7 | SSW 16 | SW 16 | SW 16 | SSW 16 | SSW 15 | SSW 15 | SW 14 |
| kJ | 268 | 170 | 176 | 119 | 117 | 135 | 107 | 80 | 90 | 131 | 278 | 295 | 77 | 322 | 261 | 255 | 215 | 146 | 144 | 100 |
Swell 2 Height (m) Direction Period (s) | S 14 | E 9 | S 13 | SSW 18 | SW 18 | NNE 7 | S 12 | NE 6 | NNE 6 | SSW 17 | NNE 7 | NNE 7 | SW 16 | S 13 | ESE 8 | S 12 | S 14 | S 13 | NW 11 | SSE 13 |
| kJ | 257 | 15 | 121 | 121 | 79 | 38 | 71 | 40 | 36 | 202 | 40 | 40 | 264 | 54 | 22 | 47 | 104 | 90 | 31 | 57 |
Swell 3 Height (m) Direction Period (s) | S 5 | SW 6 | SW 17 | WSW 6 | W 12 | SW 16 | SSW 16 | SW 16 | SSW 18 | S 11 | ENE 7 | ENE 7 | E 8 | W 10 | S 13 | WNW 10 | WNW 13 | NW 11 | SSE 13 | SSW 15 |
| kJ | 8 | 6 | 74 | 4 | 11 | 129 | 100 | 129 | 207 | 21 | 40 | 29 | 32 | 30 | 51 | 20 | 33 | 33 | 35 | 71 |
Wind waves Height (m) Direction Period (s) | ENE 7 | ENE 7 | ENE 6 | ENE 7 | ENE 8 | — | NE 6 | — | — | — | — | — | — | ENE 7 | ENE 6 | ENE 6 | ENE 7 | ENE 7 | ENE 6 | ENE 7 |
| kJ | 155 | 203 | 88 | 167 | 191 | — | 39 | — | — | — | — | — | — | 99 | 119 | 165 | 349 | 295 | 245 | 326 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 20 | 20 | 49 | 49 | 18 | 18 | 18 | 18 | 6 | 15 | 6 | 6 | 15 | 18 | 18 | 49 | 49 | 49 | 109 | 49 |
Best forecast wave conditions in Oahu | ||||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||||
Header Global | ||||||||||||||||||||
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
FREE! Surf-Forecast.com widget for your website
The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Irmas/Leftpoint surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.
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.
Nearest