
Surf Forecasts:
Irmas/Leftpoint surf forecast from 12 Aug 2026:
- Most powerful swell: Sunday 16 Aug, 11AM (local time) - 16ft (5.0m), 11s period, E swell with 6,221 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 5.0m 11s and forecast to arrive on Sunday (Aug 16) at 11AM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 16s period and expected on Tuesday (Aug 18) at 8AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 11AM (Sun 16th Aug) | 16ft (5.0m) 11s |
Table - best surf conditions forecast for Irmas/Leftpoint over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s break down the next couple of weeks. I’ll be honest – for most of this period, it’s a tough one. The first decent session doesn’t show up until way down the line, so we’ve got a long stretch of waiting.
The only break we’re looking at is Irmas/Leftpoint. It’s an exposed reef set-up, and it’s a fairly consistent spot, but the wind and swell just aren’t cooperating for a long time. From Wednesday 12 August right through to the morning of Monday 24 August, every single session is rated as poor surf conditions. The wind is mostly a fresh cross-shore, often with a lumpy cross-chop, and the swell energy is all over the place. On Saturday 15 August, the swell jumps up to 12 ft from the ENE, but with a near gale cross-shore, it’s a mess. That Sunday 16 August sees a massive 16 ft E swell, with a ton of energy, but it’s onshore from the SE and there’s a risk of thunderstorms – that’s expert-only, and even then, it’s not clean. So for a solid 12 days, there’s nothing worth paddling out for.
But then, things finally shift. The standout window is Monday 24 August. The morning kicks off with glassy conditions – wind from the east at just 3 mph, and the water is like a mirror. Swell is a clean 3 ft from the SSW, with a long 13-second period. That’s a proper groundswell, and it’s bringing moderate energy. The afternoon holds the same glassy vibe, with the wind swinging light from the NNW. This is the best on offer, hands down. It’s small but clean, and for a reef break like Irmas/Leftpoint that likes an optimum ESE swell direction, this SSW angle will still wrap in nicely. Crowds are sometimes an issue here, but on a day like this, with such a long flat spell, it might be worth the paddle.
Beyond that, Tuesday 25 August afternoon shows some promise with glassy conditions again, but the swell drops a touch to 2 ft and the score is lower. It’s a marginal call. The rest of the week after that gets choppy again with cross-onshore winds.
So, bottom line: stay patient. The first half of the outlook is a write-off. The real chance is Monday 24 August – mark it in your calendar. If you can’t wait, the forecasts can change, but as it sits, that’s your one decent shot.
Rusty.
Short Range ForecastMostly dry. Warm (max 26°C on Tue night, min 25°C on Tue night). Mainly strong winds. | Days 5-7 Weather SummaryHeavy rain (total 42mm), heaviest during Sat night. Warm (max 27°C on Sun morning, min 25°C on Fri night). Winds decreasing (gales from the ENE on Sat night, light winds from the E by Sun night). | ||||||||||||||||||
Wednesday 12 | Thursday 13 | Friday 14 | Saturday 15 | Sunday 16 | Monday 17 | ||||||||||||||
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) | S 20 | S 18 | S 18 | S 16 | S 16 | S 15 | S 15 | ENE 7 | ENE 9 | E 8 | ENE 11 | ENE 9 | E 9 | E 11 | E 9 | ENE 8 | ENE 8 | ENE 8 | ENE 7 |
Wave Graph | |||||||||||||||||||
268 | 509 | 613 | 520 | 501 | 653 | 537 | 532 | 708 | 990 | 2364 | 2044 | 2302 | 6221 | 1814 | 702 | 498 | 395 | 286 | |
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 | cross-on | on | on | cross-on | cross-on | cross | cross |
High Tide | 2:40AM0.31m | 3:14PM0.76m | 3:27AM0.36m | 3:49PM0.71m | 4:15AM0.41m | 4:22PM0.64m | 5:04AM0.45m | 4:53PM0.55m | 5:55AM0.48m | 5:21PM0.47m | 6:52AM0.50m | 5:48PM0.38m | |||||||
Low Tide | 9:52PM0.05m | 8:22AM-0.02m | 10:21PM0.04m | 9:11AM0.01m | 10:50PM0.04m | 10:01AM0.07m | 11:17PM0.04m | 10:54AM0.13m | 11:44PM0.05m | 11:53AM0.20m | 00:11AM0.05m | 1:08PM0.25m | 00:39AM0.07m | ||||||
— | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — | |
7:02 | — | 7:02 | — | — | 7:01 | — | — | 7:00 | — | — | 7:00 | — | — | 7:00 | — | — | 6:59 | — | |
mm | — | — | — | — | — | — | — | — | — | — | 1 | 1 | 27 | 7 | 5 | 1 | — | — | — |
Temp °C | 26 | 25 | 25 | 26 | 26 | 26 | 26 | 26 | 26 | 25 | 26 | 26 | 26 | 27 | 27 | 26 | 26 | 26 | 25 |
Feels °C | 24 | 22 | 22 | 23 | 23 | 23 | 23 | 22 | 23 | 22 | 23 | 22 | 21 | 25 | 27 | 27 | 28 | 25 | 23 |
Swell 1 Height (m) Direction Period (s) | SSW 14 | S 18 | S 18 | S 16 | S 16 | S 15 | S 15 | S 14 | S 14 | S 14 | S 13 | S 13 | S 14 | S 16 | S 13 | ENE 8 | ENE 8 | S 14 | S 13 |
243 | 509 | 613 | 520 | 501 | 653 | 537 | 411 | 411 | 306 | 222 | 168 | 181 | 329 | 165 | 702 | 498 | 257 | 170 | |
Swell 2 Height (m) Direction Period (s) | S 20 | SSW 13 | SSW 13 | SSW 13 | SSW 12 | W 12 | W 11 | W 12 | SSW 18 | SSW 17 | W 11 | S 16 | S 18 | W 12 | S 16 | SSE 7 | S 14 | SSE 6 | SSW 19 |
268 | 218 | 218 | 222 | 150 | 11 | 10 | 11 | 30 | 29 | 9 | 80 | 56 | 25 | 127 | 84 | 338 | 10 | 37 | |
Swell 3 Height (m) Direction Period (s) | W 13 | W 13 | W 12 | W 12 | W 12 | NNW 8 | NNW 7 | NNW 7 | NNW 8 | NNW 8 | SW 17 | NNW 8 | W 13 | NNW 8 | W 12 | S 14 | SSE 6 | SW 19 | W 11 |
30 | 30 | 25 | 11 | 11 | 6 | 5 | 5 | 6 | 6 | 12 | 6 | 30 | 7 | 11 | 246 | 26 | 58 | 10 | |
Wind waves Height (m) Direction Period (s) | ENE 7 | ENE 6 | ENE 7 | ENE 6 | ENE 6 | ENE 6 | ENE 7 | ENE 7 | ENE 9 | E 8 | ENE 11 | ENE 9 | E 9 | E 11 | E 9 | — | ENE 8 | ENE 8 | ENE 7 |
208 | 165 | 181 | 218 | 212 | 261 | 461 | 532 | 708 | 990 | 2364 | 2044 | 2302 | 6221 | 1814 | — | 300 | 395 | 286 | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 49 | 49 | 56 | 49 | 49 | 109 | 51 | 60 | 139 | 218 | 218 | 218 | 217 | 134 | 58 | 6 | 49 | 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.











