Surf Forecasts:
Irmas/Leftpoint surf forecast from 24 Aug 2026:
- Most powerful swell: Thursday 27 Aug, 11AM (local time) - 4ft (1.2m), 17s period, S swell with 861 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 1.2m 17s and forecast to arrive on Thursday (Aug 27) at 11AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.2m 9s period and expected on Thursday (Aug 27) at 11AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 11AM (Thu 27th Aug) | 4ft (1.2m) 17s |
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 coming up for Irmas/Leftpoint. It’s a reef break, fairly consistent, and it’s exposed to the swell. The water is sitting at 81°, which is about normal for this time of year.
Honestly, it’s a bit of a rough start. We’ve got a solid 16-day window ahead, but the first week and a half is not looking good. The wind is a persistent cross or cross-onshore from the ENE, blowing at 18 to 25 mph, and it’s just making a mess of things. The swell is there, mostly around 5 ft to 8 ft from the E or ENE, but it’s short period, only 6 to 8 seconds, with weak to moderate energy. The wave comment is “poor surf conditions” across the board, so from Monday 24th August right through to the start of September, it’s a write-off. There’s a long gap here with no real recommendations.
We start to see a glimmer of hope on Thursday 3rd September. The swell from the E picks up period to 14 seconds, and the energy jumps up. The wind is still cross-shore from the ENE at 18 mph, so it’s lumpy, but it’s now “marginal” rather than poor. Then on Friday 4th September, the morning looks like the best of the whole run. The swell is 7 ft from the ENE with a 14-second period, and the combined energy is strong. The wind drops to 15 mph ENE, still cross-shore, but it’s a “moderate breeze” and the description changes to “moderate cross-shore with a cross-chop.” That’s the standout. It’s still not perfect, but it’s the most powerful and promising day. The afternoon backs off a bit.
The next couple of days, Saturday 5th and Sunday 6th September, are marginal again with 6 ft to 6 ft ENE swell, 12-second period, and decent energy, but the wind stays fresh and cross-shore. Nothing to get too excited about.
Then we get a real curveball on Monday 7th September. The wind goes light – a gentle breeze from the NE at 6 mph, and the swell is a tiny 2 ft from the SSW, but with a very long 15-second period. The energy is weaker, but the wind is light and the conditions are “light cross-shore with small crossing wind ripples.” The score even bumps up. For a reef break, that long period might actually make it a bit tricky, but it’s the cleanest window we see.
And the final day of the forecast, Tuesday 8th September, has a 8 ft ENE swell but with a light 6 mph wind from the S, becoming offshore from the ESE in the afternoon. The morning is cross-onshore but light, and the afternoon goes offshore with 7 ft ENE swell. The energy is moderate. It’s a promising end, but still only marginal.
So, to cut a long story short: the first week is a no-go thanks to the wind. The true standout is Friday 4th September morning for the biggest, most powerful swell of the period. The second-best is the clean, light wind window on Monday 7th September, even if it’s small. Keep your eyes on the forecast, because it might change, but for now, it’s a waiting game.
Rusty.
Short Range ForecastMostly dry. Warm (max 26°C on Mon morning, min 25°C on Mon night). Mainly strong winds. | Days 4-6 Weather SummaryMostly dry. Warm (max 26°C on Fri afternoon, min 25°C on Thu morning). Mainly strong winds. | ||||||||||||||||||||
Monday 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | Friday 28 | Saturday 29 | Sunday 30 | |||||||||||||||
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 7 | E 7 | E 7 | E 7 | ENE 7 | E 7 | ENE 6 | S 18 | S 19 | S 17 | S 16 | S 16 | S 14 | S 14 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | NE 7 | SSW 15 |
Wave Graph | |||||||||||||||||||||
254 | 295 | 255 | 547 | 212 | 326 | 253 | 307 | 458 | 861 | 427 | 590 | 260 | 329 | 298 | 350 | 316 | 306 | 204 | 173 | 199 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross-on | cross | cross | cross | cross | cross | cross-on | cross | cross | cross |
High Tide | 1:26PM0.65m | 1:20AM0.27m | 1:56PM0.66m | 1:55AM0.30m | 2:25PM0.67m | 2:30AM0.34m | 2:53PM0.66m | 3:07AM0.39m | 3:21PM0.62m | 3:47AM0.44m | 3:48PM0.58m | 4:31AM0.49m | 4:17PM0.51m | ||||||||
Low Tide | 8:49PM0.11m | 6:56AM0.04m | 9:09PM0.10m | 7:36AM0.04m | 9:29PM0.09m | 8:15AM0.04m | 9:49PM0.07m | 8:57AM0.06m | 10:10PM0.06m | 9:43AM0.10m | 10:32PM0.05m | 10:34AM0.14m | 10:56PM0.04m | ||||||||
6:11 | — | — | 6:11 | — | — | 6:11 | — | — | 6:11 | — | — | 6:11 | — | — | 6:13 | — | — | 6:13 | — | — | |
— | 6:52 | — | — | 6:52 | — | — | 6:52 | — | — | 6:51 | — | — | 6:50 | — | — | 6:49 | — | — | 6:47 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 |
Temp °C | 26 | 26 | 26 | 26 | 26 | 26 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 26 | 25 | 25 | 25 | 25 | 26 | 26 | 26 |
Feels °C | 25 | 25 | 26 | 24 | 23 | 24 | 21 | 21 | 22 | 22 | 22 | 22 | 22 | 23 | 21 | 21 | 21 | 22 | 24 | 24 | 25 |
Swell 1 Height (m) Direction Period (s) | E 8 | SSW 13 | SSW 13 | SSW 12 | E 8 | SSW 15 | SSW 14 | S 18 | S 19 | S 17 | S 16 | S 16 | S 14 | S 14 | S 13 | E 14 | E 13 | E 12 | SSW 16 | SSW 16 | SSW 15 |
69 | 156 | 129 | 85 | 84 | 121 | 215 | 307 | 458 | 861 | 427 | 590 | 260 | 329 | 225 | 181 | 168 | 106 | 171 | 162 | 199 | |
Swell 2 Height (m) Direction Period (s) | SSW 14 | SSE 12 | SSE 7 | SSW 16 | SSW 16 | SSW 12 | SSW 18 | SSW 13 | SSW 13 | N 9 | S 12 | NNE 8 | NNE 7 | E 14 | E 12 | S 13 | S 13 | SSW 17 | E 11 | S 12 | S 11 |
168 | 48 | 15 | 146 | 196 | 81 | 107 | 59 | 98 | 6 | 73 | 11 | 15 | 61 | 113 | 85 | 89 | 188 | 66 | 100 | 84 | |
Swell 3 Height (m) Direction Period (s) | SSE 12 | SSE 8 | SSW 17 | SSE 12 | SSW 12 | SSW 18 | S 21 | SSW 11 | SSW 16 | WNW 10 | NNE 8 | E 16 | E 15 | SSE 5 | SW 19 | S 13 | S 12 | S 12 | S 12 | E 11 | E 11 |
50 | 11 | 94 | 49 | 81 | 109 | 79 | 43 | 50 | 9 | 13 | 19 | 69 | 3 | 56 | 89 | 75 | 47 | 69 | 63 | 59 | |
Wind waves Height (m) Direction Period (s) | ENE 7 | E 7 | E 7 | E 7 | ENE 7 | E 7 | ENE 6 | ENE 6 | ENE 6 | E 6 | ENE 6 | E 6 | ENE 7 | ENE 6 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | NE 7 | NE 7 |
254 | 295 | 255 | 547 | 212 | 326 | 253 | 200 | 188 | 171 | 126 | 176 | 131 | 161 | 298 | 350 | 316 | 306 | 204 | 173 | 168 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 56 | 49 | 49 | 56 | 56 | 49 | 56 | 56 | 49 | 49 | 109 | 49 | 49 | 56 | 49 | 56 | 58 | 49 | 49 | 51 | 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.











