Surf Forecasts:
Irmas/Leftpoint surf forecast from 13 Aug 2026:
- Most powerful swell: Saturday 15 Aug, 8PM (local time) - 13ft (4.0m), 9s period, E swell with 2,934 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 4.0m 9s and forecast to arrive on Saturday (Aug 15) at 8PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 16s period and expected on Wednesday (Aug 19) at 11AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 8PM (Sat 15th Aug) | 13ft (4.0m) 9s |
Table - best surf conditions forecast for Irmas/Leftpoint over the next 16 days.
The Lowdown
G’day, Rusty here.
Honestly, I’m looking at the next 16 days and I’ve got nothin’ for you. Not a single decent wave on offer at Irmas/Leftpoint. The whole period starts right now and runs through to Thursday, August 27th, and every single surf window is marked as poor surf conditions. That’s a long, flat, and messy run – feels like a total write-off.
The water temp is sitting at 81°F which is about average for the time of year, no surprise there. But the wind is the real killer. All through the first week, it’s cross-shore or cross-onshore, gusting from 22 to 34 mph, with near gale force on Saturday the 15th. The swell bumps up to 12 ft to 13 ft from the E with a short period of 9 seconds, so the energy is strong (combined energy values around 2204 to 2948), but the wind is so strong and messy it’s unrideable. Honestly, that Saturday setup looks more interesting for kite surfing than paddle surfing – a beach or reef break with that much onshore wind and size is just churned-up chaos.
Come the second week, the wind eases a bit but stays cross-shore, and the swell drops back to a weak 2 ft to 4 ft range from the SSW, with a long period of 14 to 18 seconds. The energy is low (down to 142 to 753), and with no offshore wind at all, those long-period groundswells won’t groom into anything clean. The optimum direction for Irmas/Leftpoint is ESE, so that SSW swell is coming in at a dodgy angle anyway. No standouts, no hope.
When there’s not a single consistent break in the picture, a blank run like this is more normal for the area – we just have to wait for the next change. Forecasts can turn, but right now, I’d leave the boards in the car. Rusty.
Short Range ForecastMostly dry. Warm (max 26°C on Wed night, min 25°C on Wed afternoon). Winds increasing (fresh winds from the ENE on Wed night, near gales from the ENE by Sat morning). | Days 5-7 Weather SummaryModerate rain (total 10mm), heaviest on Sun afternoon. Warm (max 26°C on Sat afternoon, min 25°C on Sat night). Winds decreasing (near gales from the ENE on Sun morning, fresh winds from the ENE by Mon night). | |||||||||||||||||||
Wed 12 | Thursday 13 | Friday 14 | Saturday 15 | Sunday 16 | Monday 17 | Tuesday 18 | ||||||||||||||
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) | S 18 | S 16 | S 16 | S 15 | ENE 7 | ENE 8 | ENE 8 | ENE 8 | E 9 | E 9 | ENE 9 | E 9 | ENE 8 | ENE 8 | ENE 8 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 |
Wave Graph  | ||||||||||||||||||||
 kJ | 613 | 520 | 501 | 653 | 579 | 623 | 570 | 1089 | 1979 | 2737 | 2342 | 1646 | 936 | 639 | 346 | 302 | 231 | 193 | 163 | 143 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross-on | cross-on | cross-on | cross-on | cross | cross-on | cross-on | cross | cross |
High Tide | 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 | 7:56AM0.52m | 6:10PM0.31m | |||||||
Low Tide | 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 | 2:59PM0.27m | 1:14AM0.09m | |||||||
 |  | | | | | |  | | | |  | |  |  | | | | | | |
 | — | — | 6:07 | — | — | 6:07 | — | — | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — |
 | 7:02 | — | — | 7:01 | — | — | 7:00 | — | — | 7:00 | — | — | 7:00 | — | — | 6:59 | — | — | 6:58 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | 1 | 5 | 4 | — | — | — | — | — | — |
Temp °C | 25 | 26 | 26 | 26 | 25 | 26 | 26 | 25 | 26 | 26 | 25 | 26 | 26 | 25 | 25 | 26 | 25 | 25 | 25 | 25 |
Feels °C | 22 | 24 | 23 | 23 | 22 | 22 | 23 | 22 | 21 | 21 | 20 | 22 | 25 | 24 | 23 | 23 | 22 | 22 | 23 | 24 |
Swell 1 Height (m) Direction Period (s) | S 18 | S 16 | S 16 | S 15 | S 15 | S 14 | S 14 | S 14 | S 13 | S 13 | S 13 | SSE 12 | S 10 | S 7 | S 14 | S 14 | S 13 | S 13 | ENE 7 | S 13 |
| kJ | 613 | 520 | 501 | 653 | 537 | 411 | 411 | 306 | 225 | 168 | 176 | 694 | 697 | 93 | 334 | 257 | 222 | 162 | 163 | 85 |
Swell 2 Height (m) Direction Period (s) | SSW 13 | SSW 13 | SSW 12 | W 12 | W 11 | W 12 | E 11 | NNW 8 | NNW 8 | S 16 | S 18 | S 16 | S 16 | S 14 | S 6 | S 6 | SSW 19 | SW 17 | S 13 | SSE 10 |
| kJ | 218 | 222 | 150 | 11 | 10 | 11 | 91 | 6 | 7 | 43 | 99 | 181 | 127 | 195 | 18 | 20 | 37 | 74 | 162 | 30 |
Swell 3 Height (m) Direction Period (s) | W 12 | W 12 | W 12 | NNW 8 | NNW 7 | NNW 8 | SSW 18 | W 11 | W 11 | W 13 | SSE 13 | W 12 | W 12 | S 16 | SW 18 | SW 19 | W 11 | W 13 | SSW 18 | SW 18 |
| kJ | 25 | 11 | 11 | 6 | 5 | 6 | 30 | 9 | 9 | 13 | 17 | 25 | 11 | 81 | 50 | 59 | 10 | 14 | 121 | 79 |
Wind waves Height (m) Direction Period (s) | ENE 6 | ENE 6 | ENE 6 | ENE 6 | ENE 7 | ENE 8 | ENE 8 | ENE 8 | E 9 | E 9 | ENE 9 | E 9 | ENE 8 | ENE 8 | ENE 8 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 |
| kJ | 218 | 218 | 252 | 329 | 579 | 623 | 570 | 1089 | 1979 | 2737 | 2342 | 1646 | 936 | 639 | 346 | 302 | 231 | 193 | 108 | 143 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 58 | 49 | 50 | 110 | 49 | 56 | 64 | 110 | 139 | 140 | 112 | 218 | 64 | 56 | 56 | 56 | 49 | 49 | 56 | 18 |
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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