Surf Forecasts:
Irmas/Leftpoint surf forecast from 19 Aug 2026:
- Best quality surf: Thursday 20 Aug, 5PM (local time) - 2ft (0.6m), 17s period, SSW swell with cross-offshore winds.
- Most powerful swell: Tuesday 25 Aug, 2PM (local time) - 5ft (1.6m), 8s period, ENE swell with 341 kJ wave energy.
- Next surfable swell (1★+): Thursday 20 Aug, 5PM (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 5PM. The primary swell is predicted to be 0.6m and 17s period with a secondary swell of 1.2m 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 1.6m 8s and forecast to arrive on Tuesday (Aug 25) at 2PM. 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+) | 5PM (Thu 20th Aug) | 2ft (0.6m) 17s |
| Best Surf | 5PM (Thu 20th Aug) | 2ft (0.6m) 17s |
| Most Powerful | 2PM (Tue 25th Aug) | 5ft (1.6m) 8s |
Table - best surf conditions forecast for Irmas/Leftpoint over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let's be straight with you. The next couple of weeks are looking pretty grim for a proper surf. We've got a long stretch of onshore and cross-shore winds, and that's just going to chop up whatever swell we get. It's a waiting game, plain and simple.
Looking at Irmas/Leftpoint, we're in for a tough run. There's a small window on the morning of Thursday, the 20th, where things might clean up. We've got a 2ft SSW swell with a long 17-18 second period, and the wind drops to a gentle breeze. It's a reef break that's fairly consistent, and that long-period energy will be doing its thing, but it's not big. It's the only real chance for a wave that isn't a complete mess, and with that long period, it might be a bit hard to judge.
After that, it's a write-off until we get into the first week of September. The winds pick up and stay strong, and the swell gets messy and short-period. The wave energy stays moderate, but it's all over the place. The last few days of August see the swell building, hitting 8ft by the 31st, but it's accompanied by a strong breeze and a lumpy cross-chop. Not worth the effort.
Now, looking further ahead. The swell really starts to build into the 1st of September. We're talking 8ft of ENE groundswell, and the energy is ramping up to strong levels. The period stretches out to a very long 11 seconds. This is where it gets interesting. However, that strong cross-shore wind is still a problem, turning what could be a great day into a messy one. It might be one for the experts only, given the size, and even then, the conditions are far from ideal. The early part of September looks like the most promising, but don't book the time off just yet.
Keep in mind, the water temp is sitting at 80°, which is right on the money for this time of year.
It's a frustrating outlook, but the ocean rarely stays flat for long. We'll just have to keep an eye on it. This is Rusty, signing off.
Short Range ForecastMostly dry. Warm (max 27°C on Thu afternoon, min 24°C on Wed morning). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 3mm), mostly falling on Mon afternoon. Warm (max 26°C on Sat morning, min 25°C on Sat night). Mainly strong winds. | ||||||||||||||||||||
Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | |||||||||||||||
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) | E 8 | E 8 | E 8 | SSW 18 | SSW 17 | NE 7 | ENE 7 | NE 7 | SSW 16 | E 6 | E 7 | E 7 | ENE 7 | SSW 15 | ENE 6 | SSW 14 | ENE 6 | ENE 7 | E 8 | ENE 8 | ENE 7 |
Wave Graph  | |||||||||||||||||||||
 kJ | 109 | 107 | 124 | 207 | 202 | 79 | 69 | 106 | 322 | 101 | 240 | 286 | 268 | 219 | 212 | 137 | 205 | 181 | 333 | 341 | 259 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross | cross | cross-off | cross | cross-on | cross | cross-on | cross-on | cross | cross | cross | cross | cross | cross-on | cross | cross-on | cross | cross | cross |
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 | 1:56PM0.66m | 1:55AM0.30m | ||||||||
Low Tide | 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 | 6:56AM0.04m | 9:09PM0.10m | |||||||||
 | |  |  | | | | | | | | | | |  | |  |  | | | | |
 | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — | 6:11 | — | — | 6:11 | — | — | 6:11 | — | — | 6:11 | — | — |
 | — | 6:57 | — | — | 6:57 | — | — | 6:55 | — | — | 6:54 | — | — | 6:53 | — | — | 6:52 | — | — | 6:52 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 2 | — | — | 1 |
Temp °C | 25 | 25 | 25 | 25 | 27 | 27 | 26 | 27 | 27 | 26 | 26 | 25 | 25 | 25 | 25 | 26 | 26 | 25 | 26 | 26 | 25 |
Feels °C | 25 | 25 | 24 | 26 | 29 | 30 | 30 | 30 | 29 | 26 | 24 | 23 | 22 | 21 | 22 | 24 | 25 | 24 | 26 | 25 | 24 |
Swell 1 Height (m) Direction Period (s) | E 8 | E 8 | E 8 | E 8 | ENE 7 | NE 7 | ENE 7 | NE 7 | SSW 16 | E 6 | SW 16 | SSW 16 | SSW 15 | SSW 15 | E 9 | E 9 | SSW 13 | E 8 | SSW 12 | SSW 16 | SSW 15 |
| kJ | 109 | 107 | 124 | 71 | 138 | 79 | 69 | 106 | 322 | 101 | 255 | 215 | 144 | 191 | 57 | 76 | 156 | 69 | 86 | 142 | 121 |
Swell 2 Height (m) Direction Period (s) | NNE 7 | S 12 | SW 16 | NE 6 | SSW 17 | SW 16 | SW 17 | SW 16 | W 10 | SW 16 | SSE 12 | S 14 | S 13 | SSE 13 | SW 14 | SSW 14 | SSE 12 | SSW 13 | SSW 16 | SSW 12 | SSW 12 |
| kJ | 38 | 71 | 129 | 61 | 202 | 278 | 295 | 264 | 31 | 261 | 50 | 104 | 90 | 60 | 100 | 121 | 48 | 93 | 146 | 56 | 56 |
Swell 3 Height (m) Direction Period (s) | S 12 | SSW 16 | S 12 | SSW 18 | W 11 | E 8 | NNE 7 | W 10 | S 13 | S 13 | WNW 12 | WNW 12 | WNW 11 | S 11 | SSE 13 | SSE 12 | SSW 18 | SSW 17 | SSE 12 | SSE 12 | SSW 18 |
| kJ | 69 | 100 | 45 | 207 | 21 | 29 | 40 | 34 | 54 | 84 | 46 | 27 | 24 | 22 | 57 | 50 | 62 | 95 | 48 | 26 | 108 |
Wind waves Height (m) Direction Period (s) | — | NE 6 | NNE 6 | — | — | — | — | — | ENE 7 | NE 7 | E 7 | E 7 | ENE 7 | ENE 6 | ENE 6 | ENE 6 | ENE 6 | ENE 7 | E 8 | ENE 8 | ENE 7 |
| kJ | — | 39 | 51 | — | — | — | — | — | 141 | 73 | 240 | 286 | 268 | 219 | 212 | 137 | 205 | 181 | 333 | 341 | 259 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 18 | 20 | 16 | 6 | 0 | 6 | 6 | 15 | 6 | 56 | 58 | 64 | 63 | 64 | 56 | 56 | 49 | 49 | 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.
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