Surf Forecasts:
Irmas/Leftpoint surf forecast from 8 Sep 2026:
- Most powerful swell: Tuesday 8 Sep, 8AM (local time) - 8ft (2.5m), 10s period, S swell with 1,402 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 2.5m 10s and forecast to arrive on Tuesday (Sep 08) at 8AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.4m 11s period and expected on Tuesday (Sep 08) at 8AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 8AM (Tue 8th Sep) | 8ft (2.5m) 10s |
Table - best surf conditions forecast for Irmas/Leftpoint over the next 16 days.
The Lowdown
G’day, Rusty here.
Alright, look, I’m not gonna sugarcoat it. We’ve got a pretty grim 16-day stretch ahead for Irmas/Leftpoint. The models are showing a real dry spell of proper surf, and the wind ain’t doing us any favours. The water temp is sitting at 81°, which is pretty much bang on average for this time of year, so at least you won’t be freezing your bits off while you’re staring at the slop.
The first real chance of anything half-decent kicks off on Tuesday, the 8th of September. Tuesday morning has a solid 8ft swell from the SSW, and the combined energy is a hefty 2458, so there’s plenty of power in the water. But the wind is a fresh cross-onshore at 19 mph, and it’s lumpy. It’s a write-off. Tuesday afternoon drops to 6ft from the ENE, still a decent 11-second period, and the wind eases to a cross-shore, but it’s still a “marginal” call. It’s messy.
Wednesday the 9th has the swell dropping right off to just 3ft from the SSW. The period is a long 14 seconds, which is nice for shape, but the wind is cross-shore and the waves are small and weak. The energy is down to 726. It’s a skunk session.
The rest of the run is a real struggle. From Thursday the 10th right through to the end of the 16 days, every single session is rated as “poor surf conditions.” The wind is persistent, often cross or cross-onshore, and the swell is small and weak. Even when the period jumps to 18 seconds or more later on, like on the 16th and 18th of September, the swell height is tiny, and the wind is howling at 22 mph. That’s just a lumpy, choppy mess.
There is no standout day. The best you could say is maybe Tuesday afternoon, the 8th, if you’re desperate, but even then the wind is a cross-shore, not offshore. It’s a week and a half of looking at the forecast and staying on the beach. The only surf that’s over 8ft is the Tuesday morning, but that’s blown out, so it’s not for anyone. The whole run is a big gap of nothing.
Honestly, if you’re thinking of paddling out, I’d save the energy. The setup looks way more interesting for kite surfing than paddle surfing with these winds.
Stay patient, the forecast can always change.
Rusty.
Short Range ForecastLight rain (total 6mm), mostly falling on Tue morning. Warm (max 28°C on Tue afternoon, min 25°C on Thu afternoon). Winds decreasing (fresh winds from the SSW on Tue morning, light winds from the S by Tue night). | Days 4-6 Weather SummaryMostly dry. Warm (max 26°C on Fri afternoon, min 25°C on Fri morning). Wind will be generally light. | ||||||||||||||||||||
Tuesday 8 | Wednesday 9 | Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | |||||||||||||||
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) | SSW 10 | ENE 11 | ENE 10 | SSW 14 | SSW 13 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 11 | ENE 11 | ENE 10 | ENE 10 | ENE 10 | NNE 9 | NE 8 | ENE 6 | NE 6 | NE 5 | NE 8 | E 8 |
Wave Graph  | |||||||||||||||||||||
 kJ | 1011 | 759 | 419 | 269 | 257 | 225 | 297 | 251 | 168 | 439 | 343 | 269 | 205 | 166 | 94 | 102 | 90 | 84 | 57 | 149 | 95 |
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-on | cross | cross | cross | cross | cross-on | cross-on | cross | cross-on | cross | cross | cross | cross | cross | cross |
High Tide | 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 | 5:15AM0.59m | 4:37PM0.37m | ||||||||
Low Tide | 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 | 11:57AM0.20m | 10:58PM0.06m | ||||||||
 |  |  | |  |  |  | | | | |  | | | | | | | | |  | |
 | 6:15 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — |
 | — | 6:39 | — | — | 6:38 | — | — | 6:37 | — | — | 6:37 | — | — | 6:36 | — | — | 6:35 | — | — | 6:34 | — |
mm | 2 | — | — | — | — | 3 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 |
Temp °C | 27 | 28 | 27 | 27 | 28 | 27 | 26 | 26 | 25 | 25 | 26 | 25 | 25 | 26 | 25 | 25 | 26 | 26 | 26 | 26 | 26 |
Feels °C | 26 | 29 | 30 | 31 | 30 | 29 | 25 | 25 | 23 | 24 | 25 | 24 | 24 | 26 | 24 | 25 | 26 | 27 | 27 | 25 | 25 |
Swell 1 Height (m) Direction Period (s) | ENE 11 | SSW 9 | ENE 10 | ENE 9 | ENE 8 | ENE 7 | E 12 | E 12 | E 11 | ENE 11 | ENE 11 | ENE 10 | ENE 10 | ENE 10 | NNE 9 | E 6 | NNE 8 | NE 8 | NE 8 | E 8 | E 8 |
| kJ | 973 | 537 | 419 | 238 | 140 | 225 | 141 | 137 | 123 | 439 | 343 | 269 | 205 | 166 | 94 | 71 | 90 | 84 | 57 | 40 | 89 |
Swell 2 Height (m) Direction Period (s) | WSW 10 | ENE 11 | SSW 8 | SSW 14 | SSW 13 | E 12 | SSW 13 | SSW 13 | SW 16 | SW 16 | SW 15 | SW 15 | NE 8 | NNE 8 | ENE 9 | NE 8 | SSW 15 | E 8 | E 8 | SW 22 | NE 8 |
| kJ | 544 | 759 | 137 | 269 | 257 | 199 | 133 | 129 | 268 | 261 | 229 | 226 | 72 | 92 | 46 | 102 | 84 | 41 | 30 | 227 | 95 |
Swell 3 Height (m) Direction Period (s) | SSW 15 | SSW 15 | SSW 14 | E 13 | E 13 | SSW 13 | SSW 16 | SW 18 | SSW 12 | NNE 8 | NNE 8 | NNE 7 | SW 15 | SW 16 | SSW 13 | SW 15 | SW 12 | SW 14 | SW 14 | SW 14 | SW 21 |
| kJ | 474 | 376 | 356 | 219 | 215 | 178 | 179 | 155 | 77 | 24 | 50 | 31 | 242 | 124 | 68 | 107 | 23 | 100 | 50 | 49 | 224 |
Wind waves Height (m) Direction Period (s) | SSW 10 | — | — | — | — | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | — | — | — | — | ENE 5 | ENE 6 | ENE 6 | NE 6 | NE 5 | NE 8 | — |
| kJ | 1011 | — | — | — | — | 160 | 297 | 251 | 168 | 88 | — | — | — | — | 51 | 35 | 90 | 72 | 51 | 149 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 95 | 7 | 2 | 6 | 18 | 6 | 49 | 20 | 18 | 18 | 18 | 18 | 41 | 18 | 49 | 49 | 6 | 6 | 18 | 20 | 20 |
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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