Surf Forecasts:
Irmas/Leftpoint surf forecast from 6 Sep 2026:
- Most powerful swell: Monday 7 Sep, 8AM (local time) - 8ft (2.5m), 12s period, ENE swell with 1,757 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 12s and forecast to arrive on Monday (Sep 07) 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 3.0m 14s period and expected on Monday (Sep 07) at 11PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 8AM (Mon 7th Sep) | 8ft (2.5m) 12s |
Table - best surf conditions forecast for Irmas/Leftpoint over the next 16 days.
The Lowdown
Alright, Rusty here again. Let’s break down what’s coming for Irmas/Leftpoint.
To be straight with you, the next couple of weeks are looking pretty rough. There’s a long stretch of poor conditions, and only a few moments that might be worth a look. The first chance is Sunday, September 6th, but it’s not great.
Sunday morning shows a 7ft swell from the ENE, with a 12-second period. There’s some energy there (2018), but the wind is a fresh 30 km/h cross-shore, and it’s partly cloudy. It’s marginal. Water temp is 81°, which is about normal for this time of year. Sunday afternoon has a risk of thunderstorms and lumpy chop, so not much better.
From Monday, September 7th through Tuesday, September 15th, it’s a dead zone. Swell sticks around but the wind is relentless – cross, cross-on, or onshore, blowing 12 to 19 mph. The combined energy of all swells directed here ranges from 192 to 2164, but the wind trashes the quality. Scores are mostly zero for nine straight days. Don’t bother.
Wednesday, September 16th morning brings a 3ft SSW swell with a very long 18-second period (793). That’s a proper groundswell, but the wind is a fresh 30 km/h cross-shore, making it lumpy. That long period will break too straight for this reef, so it’s not ideal. Afternoon picks up to 7ft from the E, but again, the wind ruins it.
Thursday, September 17th morning has a 8ft ENE swell with an 8-second period, combined energy 1227. Wind is still a fresh 30 km/h cross-shore. Some size, but quality is missing. Afternoon is similar.
Friday, September 18th morning is 7ft from the E (941), cross-shore and messy. Afternoon brings a 3ft SSW swell with an 18-second period (1045) – another long-period groundswell, but the wind is a problem.
The final days, Saturday, September 19th to Monday, September 21st, are more of the same: swell from 3ft to 8ft, winds cross-shore at 15 to 22 mph, and poor surf quality across the board.
The best on offer? There’s no real standout. Sunday, September 6th morning is the most promising, but it’s marginal. If you’re an expert and desperate, Thursday, September 17th morning has size (8ft from the ENE), but expect bumpy conditions. For the rest of us, it’s a wait.
With the persistent cross-shore winds and the reef setup, this looks more interesting for kite surfing than paddle surfing for most of the period.
Stay patient. Forecasts can change.
Rusty.
Short Range ForecastHeavy rain (total 31mm), heaviest during Sun night. Warm (max 27°C on Mon afternoon, min 25°C on Sun night). Winds decreasing (fresh winds from the SSE on Mon night, light winds from the SSE by Tue night). | Days 4-6 Weather SummaryLight rain (total 2mm), mostly falling on Wed night. Warm (max 27°C on Wed morning, min 25°C on Thu afternoon). Winds increasing (light winds from the ESE on Wed morning, fresh winds from the ENE by Thu afternoon). | ||||||||||||||||||||
Sunday 6 | Monday 7 | Tuesday 8 | Wednesday 9 | Thursday 10 | Friday 11 | Saturday 12 | |||||||||||||||
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) | ENE 12 | E 12 | ENE 12 | E 12 | ENE 12 | ENE 11 | ENE 11 | ENE 10 | ENE 9 | SSW 14 | SSW 13 | SSW 13 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 11 | ENE 7 | ENE 10 | NE 10 | ENE 6 |
Wave Graph  | |||||||||||||||||||||
 kJ | 1360 | 1412 | 1725 | 898 | 1728 | 1111 | 869 | 692 | 378 | 273 | 257 | 199 | 218 | 181 | 210 | 261 | 662 | 273 | 510 | 471 | 254 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross-on | cross-on | on | on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross | cross | cross | cross | cross | cross-on | cross | cross | cross |
High Tide | 12:00PM0.71m | 00:14AM0.26m | 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 | |||||||
Low Tide | 7:41PM0.09m | 5:40AM0.04m | 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 | ||||||||
 |  |  | | | |  |  | | | |  | | |  | | |  | | | | |
 | 6:15 | — | — | 6:15 | — | — | 6:15 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — |
 | — | 6:42 | — | — | 6:40 | — | — | 6:39 | — | — | 6:38 | — | — | 6:37 | — | — | 6:37 | — | — | 6:36 | — |
mm | — | 3 | 11 | 4 | 4 | 5 | 2 | — | 2 | — | — | 1 | 1 | — | — | — | — | — | — | — | — |
Temp °C | 26 | 26 | 26 | 26 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 26 | 26 | 26 | 25 | 25 | 25 | 25 | 25 | 25 | 25 |
Feels °C | 25 | 25 | 26 | 25 | 27 | 27 | 27 | 28 | 30 | 31 | 29 | 27 | 26 | 25 | 23 | 23 | 23 | 23 | 23 | 23 | 22 |
Swell 1 Height (m) Direction Period (s) | ENE 12 | E 12 | ENE 12 | SW 14 | ENE 12 | SW 13 | ENE 11 | ENE 10 | ENE 9 | ENE 8 | ENE 8 | E 12 | E 12 | E 12 | E 11 | ENE 12 | SW 15 | SW 15 | SW 15 | SSW 16 | SSW 13 |
| kJ | 1360 | 1412 | 1725 | 1236 | 1728 | 3502 | 869 | 692 | 378 | 212 | 179 | 199 | 139 | 137 | 127 | 142 | 232 | 226 | 191 | 99 | 68 |
Swell 2 Height (m) Direction Period (s) | SSW 12 | SSW 12 | SSW 14 | E 12 | SW 14 | ENE 11 | WSW 11 | SSW 9 | SSW 8 | SSW 8 | SSW 13 | SSW 13 | SSW 13 | SSW 13 | SW 16 | SW 16 | SSW 12 | SSW 11 | SSW 11 | SSW 13 | SW 16 |
| kJ | 336 | 563 | 1210 | 898 | 1688 | 1111 | 823 | 363 | 174 | 98 | 257 | 195 | 133 | 129 | 211 | 206 | 44 | 25 | 22 | 70 | 64 |
Swell 3 Height (m) Direction Period (s) | SSW 16 | SSW 19 | S 18 | SSW 17 | S 8 | SSW 15 | SSW 15 | W 10 | SSW 14 | SSW 14 | E 13 | SSW 8 | SSW 16 | SW 18 | S 12 | SSW 12 | SW 8 | SW 8 | WSW 8 | SSW 11 | SW 8 |
| kJ | 322 | 197 | 243 | 498 | 143 | 500 | 474 | 331 | 356 | 273 | 215 | 32 | 179 | 155 | 72 | 45 | 11 | 10 | 6 | 11 | 2 |
Wind waves Height (m) Direction Period (s) | — | ENE 12 | ENE 7 | ENE 7 | SSE 8 | — | SSW 9 | — | — | — | — | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 11 | ENE 7 | ENE 10 | NE 10 | ENE 6 |
| kJ | — | 918 | 220 | 356 | 293 | — | 517 | — | — | — | — | 181 | 218 | 181 | 210 | 261 | 662 | 273 | 510 | 471 | 254 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 49 | 49 | 25 | 113 | 41 | 61 | 30 | 4 | 4 | 4 | 18 | 18 | 18 | 18 | 18 | 22 | 49 | 49 | 20 | 49 | 49 |
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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