Surf Forecasts:
Irmas/Leftpoint surf forecast from 19 Aug 2026:
- Best quality surf: Thursday 20 Aug, 8PM (local time) - 2ft (0.6m), 17s period, SSW swell with cross-offshore winds.
- Most powerful swell: Monday 24 Aug, 5AM (local time) - 8ft (2.5m), 7s period, E swell with 723 kJ wave energy.
- Next surfable swell (1★+): Thursday 20 Aug, 8PM (local time) - 2ft (0.6m), 17s period with SSW 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 Thursday (Aug 20) at 8PM. The primary swell is predicted to be 0.6m and 17s period with a secondary swell of 1.0m and 7s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Irmas/Leftpoint in the next 16 days are 2.5m 7s and forecast to arrive on Monday (Aug 24) at 5AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.7m 16s period and expected on Friday (Aug 21) at 2AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 8PM (Thu 20th Aug) | 2ft (0.6m) 17s |
| Best Surf | 8PM (Thu 20th Aug) | 2ft (0.6m) 17s |
| Most Powerful | 5AM (Mon 24th Aug) | 8ft (2.5m) 7s |
Table - best surf conditions forecast for Irmas/Leftpoint over the next 16 days.
The Lowdown
Alright, Rusty here. Let’s have a look at the coming days at Irmas/Leftpoint.
Honestly, it’s a tough run for the next couple of weeks. The forecast is giving us a whole lot of messy, blown-out conditions with very little in the way of quality. The first surf that’s even worth a mention doesn’t show up until Thursday morning, the 20th of August, and even then it’s a marginal call.
Thursday, 20th August – Friday, 21st August
Thursday morning brings a small pulse of groundswell from the SSW, with waves around 2ft and a very long period of 18 seconds. That long period will produce some well-shaped lines, but the combined swell energy is still pretty weak (358). The wind is a gentle cross-shore, but the water is clean by the afternoon when the wind turns cross-offshore. It won’t be big, but for a patient surfer on a longboard, there might be a few clean, peeling waves. Thursday afternoon is the pick of this early window. Friday sees the swell flip to a short-period, weak NE windswell (103), and the cross-onshore breeze puts a stop to any hopes. A day to skip.
Saturday, 22nd August – Tuesday, 2nd September
This is where the forecast turns ugly. From Saturday morning, a strong and persistent ENE wind kicks in, blowing at 35-50 km/h (22-31 mph) almost daily. The swell builds from 4ft to over 6ft, and by Sunday the 24th the combined energy is moderate to strong (594 to 856). But with that wind being a strong cross-shore, the wave faces will be lumpy, messy, and full of cross-chop. It’s poor surf for a paddle board. If the wind holds at these speeds, a kite surfer might find this setup more interesting than a traditional surfer. This poor stretch carries on day after day, through the end of August, with the same ENE cross-wind and choppy conditions.
Tuesday, 1st September – The Lone Standout
Now, if you can hold out, there’s a date circled. On the morning of Tuesday, 1st September, something shifts. The combined swell energy jumps big time (2636), and the swell height hits 8ft from the east with a period of 13 seconds – a proper groundswell. But here’s the catch: the wind is still a fresh cross-shore (ENE 30 km/h / 19 mph). The afternoon gets even bigger, with 10ft waves and massive energy (3039). It’s a raw, powerful day, and because it’s over 8ft, this is strictly for experienced surfers only. The long period from the east might find the reef at Irmas and produce some heavy, grinding barrels, but that cross-shore wind will stop it from being perfect. It’s the best the whole fortnight has to offer, but it’s a rough, expert-only session with possible crowds.
After that, Wednesday and Thursday slip back into strong, messy wind and dropping swell. A blank, poor run for most of the month.
Stay patient, and maybe bring the kite gear.
Rusty.
Short Range ForecastMostly dry. Warm (max 26°C on Thu afternoon, min 24°C on Tue night). Wind will be generally light. | Days 5-7 Weather SummaryLight rain (total 4mm), mostly falling on Mon afternoon. Warm (max 26°C on Fri night, min 25°C on Fri night). Winds increasing (light winds from the ENE on Fri night, near gales from the ENE by Mon morning). | ||||||||||||||||||
Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | ||||||||||||||
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 8 | E 8 | ENE 8 | E 8 | SSW 18 | SSW 17 | NE 7 | NE 7 | NE 7 | SSW 16 | ENE 7 | ENE 7 | E 7 | E 7 | E 7 | ENE 7 | E 7 | E 8 | E 8 |
Wave Graph | |||||||||||||||||||
181 | 109 | 176 | 102 | 207 | 202 | 119 | 79 | 109 | 322 | 137 | 212 | 517 | 360 | 402 | 532 | 515 | 650 | 692 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross | cross | cross | cross-off | cross | cross-on | cross | cross-on | cross | cross | cross | cross | cross | cross | cross | cross-on | cross-on |
High Tide | 9:08AM0.53m | 10:20AM0.55m | 8:45PM0.20m | 11:21AM0.57m | 10:59PM0.20m | 12:10PM0.60m | 00:02AM0.21m | 12:51PM0.62m | 00:45AM0.24m | 1:26PM0.65m | 1:20AM0.27m | ||||||||
Low Tide | 1:14AM0.09m | 2:00AM0.10m | 7:38PM0.20m | 3:06AM0.11m | 7:49PM0.17m | 4:20AM0.10m | 8:09PM0.14m | 5:23AM0.08m | 8:29PM0.12m | 6:13AM0.06m | 8:49PM0.11m | ||||||||
— | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — | 6:11 | — | — | 6:11 | — | — | 6:11 | — | — | |
6:58 | — | 6:57 | — | — | 6:57 | — | — | 6:55 | — | — | 6:54 | — | — | 6:53 | — | — | 6:52 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 4 | 11 |
Temp °C | 25 | 25 | 25 | 25 | 25 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 25 | 25 | 25 | 25 | 26 | 26 | 25 |
Feels °C | 23 | 25 | 25 | 24 | 26 | 28 | 29 | 29 | 28 | 27 | 24 | 23 | 23 | 22 | 22 | 22 | 21 | 23 | 24 |
Swell 1 Height (m) Direction Period (s) | S 13 | E 8 | S 12 | E 8 | E 8 | NE 6 | NE 7 | NE 7 | NE 7 | SSW 16 | ENE 7 | SW 16 | SSW 16 | SSW 15 | SSW 15 | ESE 11 | SSW 14 | SSW 13 | SSW 13 |
117 | 109 | 71 | 102 | 72 | 43 | 119 | 79 | 109 | 322 | 137 | 255 | 215 | 144 | 191 | 150 | 121 | 156 | 93 | |
Swell 2 Height (m) Direction Period (s) | SW 18 | NE 7 | SSW 16 | SW 16 | SSW 18 | E 8 | SW 16 | SW 17 | SW 16 | W 10 | SW 16 | SSE 12 | S 14 | S 13 | ESE 11 | SW 14 | SSE 13 | SSE 12 | SSW 17 |
79 | 44 | 100 | 129 | 207 | 54 | 278 | 295 | 264 | 49 | 261 | 50 | 104 | 90 | 98 | 100 | 54 | 50 | 95 | |
Swell 3 Height (m) Direction Period (s) | W 12 | S 12 | SW 19 | S 12 | S 11 | SSW 17 | S 11 | E 7 | W 11 | S 13 | E 8 | WNW 11 | WNW 10 | WNW 11 | SSE 13 | SSE 13 | NW 11 | NW 11 | SSE 12 |
25 | 69 | 92 | 45 | 39 | 202 | 22 | 24 | 55 | 54 | 34 | 37 | 22 | 23 | 35 | 57 | 18 | 19 | 26 | |
Wind waves Height (m) Direction Period (s) | ENE 8 | — | ENE 8 | NNE 6 | NE 6 | — | — | — | — | ENE 7 | — | ENE 7 | E 7 | E 7 | E 7 | ENE 7 | E 7 | E 8 | E 8 |
181 | — | 176 | 49 | 40 | — | — | — | — | 132 | — | 212 | 517 | 360 | 402 | 532 | 515 | 650 | 692 | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 18 | 18 | 18 | 18 | 6 | 6 | 6 | 6 | 15 | 18 | 49 | 56 | 50 | 56 | 218 | 217 | 139 | 64 | 56 |
Best forecast wave conditions in Oahu | |||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||
Header Global | |||||||||||||||||||
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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.











