Surf Forecasts:
Irmas/Leftpoint surf forecast from 16 Aug 2026:
- Most powerful swell: Saturday 15 Aug, 11PM (local time) - 16ft (5.0m), 10s period, E swell with 5,274 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 10s and forecast to arrive on Saturday (Aug 15) at 11PM. Winds are predicted to be cross-onshore 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+) | - | - |
| Best Surf | - | - |
| Most Powerful | 11PM (Sat 15th Aug) | 16ft (5.0m) 10s |
Table - best surf conditions forecast for Irmas/Leftpoint over the next 16 days.
The Lowdown
Alright, Rusty here, lookin’ at the forecast for Irmas/Leftpoint. It’s a reef setup over there, fairly consistent, and it likes the swell from an ESE direction.
Right now, we're looking at a pretty grim stretch for the next couple of weeks, I won't lie to ya. For the first ten days, it’s pretty much a write-off. The wind is mostly howling from the ENE, smashing that swell, and making things ugly. We do see some pretty solid energy come through on the 15th and 16th of August, with the combined swell energy hitting a whopping 4799 (very strong), and 1807 (strong), but it’s all tangled up with a strong cross-shore wind. The waves are gonna be a mess of closeouts and chop. That’s not what we want on a reef.
From the 17th of August right through to the 28th of August, it’s the same story day in, day out: mostly cross-shore or cross-onshore winds between 12 mph and 25 mph. The swell energy drops right down into the low hundreds (weak) for a bit, with choppy, lumpy conditions. There are a few moments with long period swell, like periods up to 18 seconds on the 20th, but again, the winds just won't let it clean up. It’s a no-go for a good paddle session through this whole period.
Now, the best we’ve got on offer, and I’m using that word loosely, is kicking off around the 30th of August. We start seeing a real boost in swell energy. On Sunday morning the 30th of August, we’ve got a 7 ft swell from the east (14-second period), with a combined energy of 1768. That’s a fair bit of water. The wind is a light 9 mph from the ENE, which is cross-onshore, making it "fairly choppy", but it’s the best looking window in this whole forecast. It's only rated marginal, but that afternoon holds a 5 ft swell from the east (14-second period) with energy still strong at 1013, and the wind swinging to a moderate cross-shore. It’s not perfect, but it's the best size and period we’re gonna see for a while, showing some real potential if those winds drop a touch more. It’s still a week away, so it’s promising but less certain. Keep an eye on it.
Don’t bother getting in the water before then. The setup just looks better for kites than paddle boards for pretty much the whole run.
Rusty.
Short Range ForecastHeavy rain (total 51mm), heaviest during Sun morning. Warm (max 26°C on Sat afternoon, min 24°C on Sat night). Winds decreasing (near gales from the ENE on Sat afternoon, light winds from the ENE by Sun night). | Days 5-7 Weather SummaryMostly dry. Warm (max 26°C on Thu morning, min 24°C on Tue night). Wind will be generally light. | |||||||||||||||||||
Sat 15 | Sunday 16 | Monday 17 | Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | ||||||||||||||
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 10 | E 10 | ENE 9 | ENE 8 | ENE 8 | ENE 8 | S 14 | ENE 7 | ENE 7 | ENE 7 | ENE 8 | ENE 8 | ENE 8 | E 8 | SSW 18 | SSW 17 | E 7 | NE 6 | ENE 7 | SSW 16 |
Wave Graph  | ||||||||||||||||||||
 kJ | 4551 | 3147 | 1135 | 782 | 472 | 338 | 261 | 197 | 188 | 135 | 196 | 167 | 183 | 102 | 207 | 202 | 68 | 40 | 36 | 322 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-on | on | cross-on | cross-on | cross-on | cross | cross | cross | cross | cross-on | cross-on | cross | cross | cross | cross | cross | cross | cross | cross |
High Tide | 4:53PM0.55m | 5:55AM0.48m | 5:21PM0.47m | 6:52AM0.50m | 5:48PM0.38m | 7:56AM0.52m | 6:10PM0.31m | 9:08AM0.53m | 10:20AM0.55m | 8:45PM0.20m | 11:21AM0.57m | 10:59PM0.20m | ||||||||
Low Tide | 11:44PM0.05m | 11:53AM0.20m | 00:11AM0.05m | 1:08PM0.25m | 00:39AM0.07m | 2:59PM0.27m | 1:14AM0.09m | 2:00AM0.10m | 7:38PM0.20m | 3:06AM0.11m | 7:49PM0.17m | 4:20AM0.10m | ||||||||
 |  | | | |  | |  | | | | | |  |  | |  | | | | |
 | — | — | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — |
 | 7:00 | — | — | 7:00 | — | — | 6:59 | — | — | 6:58 | — | — | 6:57 | — | — | 6:57 | — | — | 6:55 | — |
mm | 1 | 11 | 31 | 6 | 2 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 26 | 26 | 24 | 26 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 26 | 26 | 25 | 25 | 26 | 26 |
Feels °C | 21 | 20 | 22 | 27 | 24 | 24 | 23 | 23 | 23 | 23 | 24 | 25 | 25 | 26 | 27 | 26 | 26 | 26 | 28 | 28 |
Swell 1 Height (m) Direction Period (s) | S 13 | S 14 | SSE 10 | S 8 | ENE 8 | S 14 | S 14 | S 13 | S 13 | S 13 | S 13 | ENE 8 | S 12 | E 8 | SSW 18 | E 7 | E 7 | NE 6 | SW 16 | SSW 16 |
| kJ | 168 | 179 | 540 | 212 | 472 | 338 | 257 | 170 | 162 | 119 | 117 | 167 | 71 | 102 | 207 | 88 | 68 | 40 | 264 | 322 |
Swell 2 Height (m) Direction Period (s) | S 16 | S 18 | S 16 | S 10 | S 7 | S 6 | SW 6 | E 9 | SW 17 | SSW 18 | SW 18 | SW 16 | SSW 16 | NE 6 | S 11 | SSW 17 | SW 16 | SW 17 | ENE 7 | NE 7 |
| kJ | 80 | 99 | 132 | 72 | 70 | 24 | 8 | 15 | 74 | 121 | 79 | 129 | 100 | 40 | 39 | 202 | 274 | 295 | 36 | 37 |
Swell 3 Height (m) Direction Period (s) | W 13 | W 13 | W 12 | S 16 | S 14 | SW 18 | SW 19 | SSW 5 | W 13 | NE 8 | W 12 | S 12 | SW 19 | SW 16 | SW 8 | S 11 | NNE 6 | E 8 | E 8 | E 8 |
| kJ | 13 | 13 | 25 | 127 | 250 | 50 | 58 | 3 | 14 | 9 | 11 | 44 | 92 | 129 | 11 | 21 | 23 | 34 | 12 | 29 |
Wind waves Height (m) Direction Period (s) | E 10 | E 10 | ENE 9 | ENE 8 | ENE 8 | ENE 8 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 8 | NE 6 | ENE 8 | — | ENE 7 | NNE 6 | — | — | NNE 7 | — |
| kJ | 4551 | 3147 | 1135 | 782 | 285 | 310 | 261 | 197 | 188 | 135 | 196 | 24 | 183 | — | 131 | 35 | — | — | 29 | — |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 218 | 140 | 41 | 6 | 17 | 49 | 49 | 18 | 49 | 18 | 18 | 41 | 18 | 18 | 18 | 18 | 18 | 16 | 18 | 15 |
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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