
Surf Forecasts:
Irmas/Leftpoint surf forecast from 7 Sep 2026:
- Best quality surf: Wednesday 9 Sep, 2AM (local time) - 5ft (1.5m), 10s period, ENE swell with glassy winds.
- Most powerful swell: Tuesday 8 Sep, 2AM (local time) - 13ft (4.0m), 13s period, SSW swell with 5,584 kJ wave energy.
- Next surfable swell (1★+): Wednesday 9 Sep, 2AM (local time) - 5ft (1.5m), 10s period with ENE 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 Wednesday (Sep 09) at 2AM. The primary swell is predicted to be 1.5m and 10s period with a secondary swell of 1.0m and 8s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Irmas/Leftpoint in the next 16 days are 4.0m 13s and forecast to arrive on Tuesday (Sep 08) at 2AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 4.0m 15s period and expected on Monday (Sep 07) at 11PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2AM (Wed 9th Sep) | 5ft (1.5m) 10s |
| Best Surf | 2AM (Wed 9th Sep) | 5ft (1.5m) 10s |
| Most Powerful | 2AM (Tue 8th Sep) | 13ft (4.0m) 13s |
Table - best surf conditions forecast for Irmas/Leftpoint over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let's have a look at what's on the table for the next couple of weeks. Gotta be straight with you, it’s a pretty rough patch for clean waves.
The outlook kicks off on Monday, September 7th, but honestly, it’s a write-off. The first real mention of surf is at Irmas/Leftpoint, but conditions are just ugly. We get a 6 ft east swell with a long 12-second period, and on paper, that 'ESE' swell direction is ideal for the break. But the wind is howling onshore from the east at 16 mph. The water sits at a warm 81°, which is pretty standard for this time of year, but the ocean is just blown-out, choppy, and messy. The combined wave energy is moderate, coming in at 1755, but it's all wasted energy with that wind. The forecast scores this one a zero.
Tuesday the 8th isn't much better. There's a bigger push of swell Tuesday morning with 8 ft from the SSW, but that's accompanied by a strong southerly cross-onshore wind at 22 mph. It's lumpy and poor. The afternoon cleans up a little with a lighter 12 mph cross-shore breeze and a different swell (6 ft from the ENE), but the forecast still only gives it a low score, calling it marginal.
And from there, it's a grim slide. From Wednesday the 9th all the way through the rest of the 16-day window, the wind is either a moderate to fresh onshore or cross-shore, never turning offshore. Swell sizes bounce around, but the quality never locks in. We see a 3 ft south groundswell on the 9th with a nice 14-second period, but the onshore wind ruins it. The combined energy is moderate at 695-743, but it’s all for nothing.
From the 10th to the 14th, the swell goes short and weak, with periods dropping to just 7-8 seconds and energy readings well under 500. It’s basically a flat spell of junk surf.
The second week has a bit more size but zero quality. By Wednesday the 16th, we get a 6 ft ENE swell, but the wind is a fresh 22 mph cross-shore. Then from Thursday the 17th through the weekend of the 20th, things actually get dangerous. Swell hits 8 ft and the ENE wind cranks up to a strong 25 mph. The combined energy spikes well into the four-digit range (1115-1408), but it's a full-on mess. Windswell with that kind of strength and period around 8 seconds is just brutal, creating lumpy, choppy, and messy conditions. Even for the gnarliest locals, this is a hard pass. It's the kind of setup that’s more interesting for kite surfing than paddle surfing.
So, what’s the standout? There isn't one. There’s no standout day, no single session to point you to. The entire 16-day forecast is a consistent run of poor or marginal conditions. I hate to say it, but you're better off doing something else for the next two weeks. The forecast can change, and sometimes these blanks don't last, but right now there is nothing good on offer.
Rusty.
Short Range ForecastHeavy rain (total 24mm), heaviest during Mon morning. Warm (max 27°C on Mon morning, min 25°C on Wed night). Winds decreasing (strong winds from the SSE on Mon night, calm by Tue night). | Days 4-6 Weather SummaryMostly dry. Warm (max 26°C on Thu morning, min 24°C on Fri night). Mainly fresh winds. | ||||||||||||||||||||
Monday 7 | Tuesday 8 | Wednesday 9 | Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | |||||||||||||||
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) | E 12 | E 12 | SSW 13 | SSW 10 | ENE 11 | ENE 10 | SSW 14 | SSW 13 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 11 | ENE 10 | ENE 10 | ENE 10 | ENE 9 | NE 8 | NE 9 | NE 8 |
Wave Graph | |||||||||||||||||||||
898 | 855 | 5584 | 1049 | 711 | 419 | 269 | 257 | 208 | 231 | 229 | 197 | 183 | 297 | 400 | 294 | 205 | 153 | 138 | 210 | 102 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | on | cross-on | cross-on | cross | glassy | cross-on | cross-on | cross-on | cross-on | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross |
High Tide | 12:48PM0.73m | 1:03AM0.31m | 1:30PM0.72m | 1:48AM0.38m | 2:07PM0.69m | 2:29AM0.44m | 2:41PM0.65m | 3:11AM0.50m | 3:13PM0.59m | 3:51AM0.55m | 3:42PM0.51m | 4:32AM0.57m | 4:10PM0.44m | ||||||||
Low Tide | 8:09PM0.07m | 6:40AM0.03m | 8:36PM0.05m | 7:34AM0.03m | 9:01PM0.04m | 8:25AM0.05m | 9:26PM0.04m | 9:14AM0.08m | 9:49PM0.03m | 10:05AM0.12m | 10:11PM0.04m | 10:58AM0.16m | 10:34PM0.05m | ||||||||
6:15 | — | — | 6:15 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | |
— | 6:40 | — | — | 6:39 | — | — | 6:38 | — | — | 6:37 | — | — | 6:37 | — | — | 6:36 | — | — | 6:35 | — | |
mm | 5 | 4 | 10 | 2 | — | — | — | 1 | 2 | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 26 | 26 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 |
Feels °C | 27 | 28 | 26 | 26 | 27 | 31 | 30 | 29 | 27 | 25 | 23 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 23 |
Swell 1 Height (m) Direction Period (s) | E 12 | SW 14 | ENE 12 | ENE 11 | ENE 11 | ENE 10 | ENE 9 | ENE 8 | E 12 | E 12 | E 12 | E 11 | ENE 7 | ENE 11 | ENE 10 | ENE 10 | NNE 9 | NNE 9 | E 9 | SSW 15 | NE 8 |
898 | 1752 | 1338 | 973 | 711 | 419 | 207 | 217 | 199 | 141 | 101 | 123 | 183 | 297 | 400 | 294 | 94 | 94 | 59 | 84 | 102 | |
Swell 2 Height (m) Direction Period (s) | SW 11 | ENE 8 | SSW 16 | W 10 | SSW 8 | SSW 8 | SSW 14 | SSW 13 | SSW 13 | SSW 13 | SSW 13 | SW 16 | SW 16 | NNE 8 | SW 15 | NE 8 | SW 16 | SSW 13 | SW 15 | SW 12 | ENE 8 |
418 | 437 | 527 | 339 | 389 | 137 | 269 | 257 | 178 | 133 | 129 | 214 | 261 | 71 | 226 | 72 | 124 | 68 | 107 | 23 | 53 | |
Swell 3 Height (m) Direction Period (s) | SSW 17 | E 12 | NNW 12 | SSW 15 | W 9 | SSW 14 | E 13 | E 13 | S 7 | SSW 16 | SW 18 | S 12 | SW 10 | SW 15 | NNE 7 | SW 15 | SW 13 | SW 16 | SW 12 | S 10 | SSW 14 |
486 | 855 | 15 | 474 | 201 | 356 | 219 | 215 | 24 | 181 | 155 | 71 | 33 | 229 | 36 | 242 | 87 | 64 | 37 | 8 | 80 | |
Wind waves Height (m) Direction Period (s) | ENE 7 | — | SSW 13 | SSW 10 | — | — | — | S 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | — | — | — | — | ENE 10 | ENE 9 | NE 8 | NE 9 | — |
371 | — | 5584 | 1049 | — | — | — | 54 | 208 | 231 | 229 | 197 | — | — | — | — | 205 | 153 | 138 | 210 | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 234 | 107 | 108 | 125 | 7 | 0 | 6 | 6 | 18 | 49 | 18 | 18 | 18 | 20 | 18 | 18 | 18 | 18 | 18 | 18 | 16 |
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.










