Surf Forecasts:
Irmas/Leftpoint surf forecast from 20 Aug 2026:
- Most powerful swell: Wednesday 26 Aug, 8PM (local time) - 2.5ft (0.8m), 19s period, S swell with 455 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 0.8m 19s and forecast to arrive on Wednesday (Aug 26) 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+) | - | - |
| Best Surf | - | - |
| Most Powerful | 8PM (Wed 26th Aug) | 2.5ft (0.8m) 19s |
Table - best surf conditions forecast for Irmas/Leftpoint over the next 16 days.
The Lowdown
Alright, rusty here, checkin’ in with the local surf outlook for Irmas/Leftpoint.
Alright, let’s be straight with you. Right now, and for the next two and a half weeks, this stretch of coast is looking pretty grim for paddle surfing. The whole period is plagued by onshore and cross-shore winds, making for messy, lumpy conditions. There’s barely a window of clean surf, so if you were hoping for some magic, temper those expectations. The water temp is about average for this time of year, so don’t expect any surprises there.
We start off on Thursday the 20th of August with a tiny 2ft SSW swell, but it's long-period groundswell (18 seconds) and it's still a bit cross-chop from the NE breeze. Combined energy is weak (347), and the conditions are just marginal. It’s just not worth getting wet for.
From Friday the 21st right through until the end of August, it’s a write-off. The swell is coming from the ENE, gusting up to 28 mph, and the wave heights climb up to 7ft by Monday the 24th. But with those cross and cross-onshore winds, the surf quality is poor. The combined swell energy gets strong, (like 625 on Tuesday the 25th), but it doesn’t matter – it’s just a mess of cross-chop. This setup is far more interesting for kite surfing than paddling.
The situation doesn’t really improve in early September. On Sunday the 30th and Monday the 31st of August, we see some size (up to 8ft from the ENE), but it's still cross-shore and lumpy. The energy is massive (over 2000), but the wind is just ruining it. It’s not beginner-friendly at that size, and it’s not clean for anyone else. Tuesday the 1st of September is similar, and conditions stay marginal at best, with a score that doesn’t give us much hope.
Around the 2nd of September, the wind eases a little (16 mph), and there’s a 8ft ENE swell. It’s still cross-shore and lumpy, but the moderate breeze is a step down from the earlier gales. By Thursday the 3rd, the swell drops right back to a 2ft S swell with a long period of 21 seconds, but we’re back to moderate cross-chop. The whole run is a bust.
In short, this is a blank run for us. It’s pretty normal for this area to go through a patch like this with persistent wind. It doesn’t tend to stay poor for long, so don’t lose hope, but for now, your board’s staying on the roof.
Rusty.
Short Range ForecastMostly dry. Warm (max 27°C on Fri afternoon, min 25°C on Wed night). Winds increasing (light winds from the ENE on Thu night, strong winds from the ENE by Sat afternoon). | Days 5-7 Weather SummaryLight rain (total 6mm), mostly falling on Mon afternoon. Warm (max 26°C on Mon morning, min 25°C on Sat night). Winds decreasing (strong winds from the ENE on Sun night, moderate winds from the E by Mon night). | ||||||||||||||||||
Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | ||||||||||||||
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) | E 8 | SSW 18 | SSW 17 | NE 7 | ENE 7 | ENE 7 | SSW 16 | ENE 6 | ENE 7 | E 7 | ENE 7 | ENE 7 | ENE 7 | ENE 6 | ENE 7 | E 7 | E 7 | ENE 7 | ENE 7 |
Wave Graph  | |||||||||||||||||||
 kJ | 124 | 207 | 202 | 119 | 65 | 74 | 322 | 129 | 240 | 320 | 326 | 307 | 332 | 320 | 247 | 345 | 366 | 355 | 254 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross | cross | cross-on | cross-on | cross-on | cross | cross | cross | cross | cross | cross | cross-on | cross-on | cross-on | cross | cross-on | cross-on |
High Tide | 10:20AM0.55m | 8:45PM0.20m | 11:21AM0.57m | 10:59PM0.20m | 12:10PM0.60m | 00:02AM0.21m | 12:51PM0.62m | 00:45AM0.24m | 1:26PM0.65m | 1:20AM0.27m | 1:56PM0.66m | 1:55AM0.30m | |||||||
Low Tide | 2:00AM0.10m | 7:38PM0.20m | 3:06AM0.11m | 7:49PM0.17m | 4:20AM0.10m | 8:09PM0.14m | 5:23AM0.08m | 8:29PM0.12m | 6:13AM0.06m | 8:49PM0.11m | 6:56AM0.04m | 9:09PM0.10m | |||||||
 |  | |  | | | | | | | | | |  |  |  | | | | |
 | — | 6:09 | — | — | 6:09 | — | — | 6:11 | — | — | 6:11 | — | — | 6:11 | — | — | 6:11 | — | — |
 | 6:57 | — | 6:57 | — | — | 6:55 | — | — | 6:54 | — | — | 6:53 | — | — | 6:52 | — | — | 6:52 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 2 | 2 | 1 | 3 |
Temp °C | 25 | 26 | 26 | 26 | 26 | 27 | 27 | 26 | 26 | 25 | 25 | 25 | 25 | 26 | 26 | 26 | 26 | 26 | 26 |
Feels °C | 24 | 28 | 28 | 29 | 29 | 30 | 28 | 24 | 23 | 22 | 22 | 21 | 21 | 24 | 25 | 26 | 26 | 24 | 26 |
Swell 1 Height (m) Direction Period (s) | E 8 | NE 7 | ENE 7 | NE 7 | ENE 7 | ENE 7 | SSW 16 | SW 16 | SW 16 | SSW 16 | SSW 15 | SSW 15 | SW 14 | SSW 14 | E 8 | SSW 13 | SSW 12 | SSW 16 | SSW 15 |
| kJ | 124 | 69 | 160 | 119 | 65 | 74 | 322 | 261 | 255 | 215 | 144 | 191 | 100 | 104 | 90 | 93 | 86 | 142 | 121 |
Swell 2 Height (m) Direction Period (s) | SW 16 | E 8 | SSW 17 | SW 16 | SW 17 | SW 16 | S 13 | E 8 | SSE 12 | S 14 | S 13 | SSE 13 | SSE 13 | SSE 12 | SSW 13 | SSE 12 | SSW 16 | SSW 12 | SSW 12 |
| kJ | 129 | 71 | 202 | 278 | 295 | 264 | 54 | 31 | 50 | 104 | 90 | 59 | 57 | 50 | 156 | 46 | 146 | 56 | 55 |
Swell 3 Height (m) Direction Period (s) | S 12 | SSW 18 | W 11 | W 9 | NNE 7 | NNE 7 | W 10 | S 13 | WNW 11 | WNW 12 | WNW 11 | WNW 11 | SSW 15 | SSW 18 | SSE 12 | SSW 17 | SSE 12 | SSE 6 | SSW 18 |
| kJ | 45 | 207 | 21 | 28 | 41 | 26 | 30 | 84 | 37 | 28 | 25 | 24 | 71 | 62 | 48 | 95 | 27 | 8 | 108 |
Wind waves Height (m) Direction Period (s) | NNE 6 | — | — | — | — | — | ENE 7 | ENE 6 | ENE 7 | E 7 | ENE 7 | ENE 7 | ENE 7 | ENE 6 | ENE 7 | E 7 | E 7 | ENE 7 | ENE 7 |
| kJ | 51 | — | — | — | — | — | 99 | 129 | 240 | 320 | 326 | 307 | 332 | 320 | 247 | 345 | 366 | 355 | 254 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 17 | 6 | 15 | 6 | 6 | 6 | 6 | 49 | 58 | 58 | 62 | 110 | 58 | 56 | 56 | 49 | 18 | 49 | 20 |
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.
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