
Surf Forecasts:
Irmas/Leftpoint surf forecast from 9 Aug 2026:
- Most powerful swell: Sunday 16 Aug, 2PM (local time) - 13ft (4.0m), 13s period, ENE swell with 5,014 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 13s and forecast to arrive on Sunday (Aug 16) at 2PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 17s period and expected on Sunday (Aug 09) at 11AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 2PM (Sun 16th Aug) | 13ft (4.0m) 13s |
Table - best surf conditions forecast for Irmas/Leftpoint over the next 16 days.
The Lowdown
Alright, let’s get into it. The long-range picture for Irmas/Leftpoint is a bit of a grind, if I’m being honest. We’ve got a lot of days ahead where the wind is just gonna be messing things up. For the first week, the trade winds are cranking from the ENE and NE, blowing cross-shore and keeping the ocean lumpy and chopped up. The swell is there, but it’s short-period windswell, mostly in the 5 to 7 feet range, and it’s just not going to have any shape to it. The energy is moderate, in the 400 to 600 range, but it’s all for nothing with that wind. This stretch from Sunday the 9th through Friday the 14th is looking like a write-off for a proper surf. You’d be fighting bumpy, messy waves and paddling into a cross-breeze all session. Not worth the hassle.
Now, there is a bit of a pulse that tries to show up around the 15th and 16th. The swell size jumps up, with the 15th seeing 8 to 10 feet, and the energy really starts to build, hitting 1849 and then a big 2611 on the Saturday afternoon. That’s moderate to strong energy, but the wind is still howling cross-shore, so it’s going to be a mess. Sunday the 16th, we finally get a bit of relief, with the wind swinging to the NNE and going cross-offshore. The swell is a solid 12 feet, but the period is only 12-13 seconds, and the energy is strong at 5720. The wave comment calls it marginal, and the score is a 4 out of 10. That’s our best bet in the first week, but it’s still a heavy, powerful wave with a cross-off wind. It’s going to be big and powerful, and it’s not for the faint of heart. I’d say that Sunday the 16th is the standout, but it’s a qualified one. For a spot that’s exposed to the ESE, this ENE swell is okay, but it’s not the ideal direction.
After that, things get weird and small. The 17th drops off, and the 18th sees the swell collapse to 2 feet with a long-period S swell, but the scores are still poor. The rest of that week is just marginal, with small waves and cross-shore winds again. The energy is weak, and it’s just not going to be worth paddling out.
Looking further ahead, around the 22nd and 23rd, there’s another pulse of ENE windswell, pushing 8 to 10 feet, but the period is short and the wind is back to cross-shore. It’s a lot of water moving, but it’s going to be junky.
So, what’s the call? The only real window of opportunity is the morning of Sunday, August 16th. You’ve got a big 12 feet swell, clean conditions with that cross-offshore wind, and strong energy. But it’s going to be a handful. The water temp is 80°, which is about normal for this time of year, so no surprises there. The break is a reef, fairly consistent, and it can get crowded. If you’re an expert, that’s your window. For everyone else, it’s a long stretch of waiting. The first week is a total loss, and the second week is looking like a lottery. Keep an eye on the forecasts, because things can change, but right now, I’m not overly excited.
Rusty
Short Range ForecastMostly dry. Warm (max 26°C on Mon morning, min 25°C on Sun morning). Mainly fresh winds. | Days 4-6 Weather SummaryMostly dry. Warm (max 26°C on Wed night, min 25°C on Wed morning). Mainly fresh winds. | ||||||||||||||||||||
Sunday 9 | Monday 10 | Tuesday 11 | Wednesday 12 | Thursday 13 | Friday 14 | Saturday 15 | |||||||||||||||
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) | ENE 7 | ENE 8 | ENE 7 | E 7 | ENE 7 | E 7 | ENE 7 | SSW 14 | S 20 | S 18 | S 18 | S 16 | S 16 | S 15 | S 15 | S 14 | ENE 8 | ENE 9 | ENE 11 | ENE 11 | E 13 |
Wave Graph | |||||||||||||||||||||
254 | 322 | 346 | 251 | 292 | 238 | 208 | 269 | 268 | 509 | 613 | 520 | 501 | 653 | 537 | 426 | 411 | 863 | 1347 | 1689 | 3567 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross-on | cross | cross | cross-on | cross-on | cross | cross | cross | cross | cross-on | cross | cross | cross | cross | cross | cross | cross | cross | cross |
High Tide | 1:10PM0.77m | 1:01AM0.23m | 1:55PM0.79m | 1:52AM0.27m | 2:36PM0.79m | 2:40AM0.31m | 3:14PM0.76m | 3:27AM0.36m | 3:49PM0.71m | 4:15AM0.41m | 4:22PM0.64m | 5:04AM0.45m | 4:53PM0.55m | ||||||||
Low Tide | 8:50PM0.08m | 6:37AM-0.03m | 9:21PM0.06m | 7:31AM-0.04m | 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 | ||||||||
6:05 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:09 | — | — | |
— | 7:05 | — | — | 7:04 | — | — | 7:02 | — | — | 7:02 | — | — | 7:01 | — | — | 7:00 | — | — | 7:00 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 25 | 25 | 25 | 26 | 26 | 26 | 26 | 26 | 25 | 25 | 25 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 |
Feels °C | 24 | 23 | 24 | 26 | 24 | 25 | 25 | 24 | 23 | 23 | 22 | 24 | 24 | 23 | 23 | 23 | 23 | 24 | 25 | 25 | 25 |
Swell 1 Height (m) Direction Period (s) | SSW 13 | SSW 12 | S 16 | SSW 15 | SSW 16 | SSW 15 | SSW 14 | SSW 14 | SSW 14 | S 18 | S 18 | S 16 | S 16 | S 15 | S 15 | S 14 | S 14 | S 14 | S 13 | S 13 | E 13 |
98 | 86 | 131 | 184 | 191 | 186 | 165 | 269 | 243 | 509 | 613 | 520 | 501 | 653 | 537 | 411 | 411 | 302 | 280 | 219 | 3567 | |
Swell 2 Height (m) Direction Period (s) | SW 17 | SSW 16 | SSW 12 | SSW 12 | SSW 11 | SSW 11 | SSW 11 | SSE 9 | S 20 | SSW 13 | SSW 13 | SSW 13 | SSW 12 | NNW 8 | NNW 7 | W 12 | ESE 11 | NNW 9 | NNW 8 | NNW 8 | S 13 |
135 | 102 | 83 | 56 | 49 | 23 | 41 | 15 | 268 | 218 | 218 | 222 | 150 | 6 | 5 | 11 | 43 | 16 | 14 | 13 | 222 | |
Swell 3 Height (m) Direction Period (s) | SSW 17 | SSW 18 | NNW 10 | NNW 9 | NNW 9 | NNW 8 | SSE 9 | S 21 | W 13 | W 13 | WNW 12 | WNW 12 | W 12 | W 12 | W 11 | NNW 7 | SSW 18 | W 11 | W 11 | S 16 | S 18 |
96 | 102 | 33 | 28 | 25 | 13 | 16 | 79 | 30 | 13 | 14 | 14 | 11 | 11 | 10 | 5 | 30 | 9 | 9 | 43 | 99 | |
Wind waves Height (m) Direction Period (s) | ENE 7 | ENE 8 | ENE 7 | E 7 | ENE 7 | E 7 | ENE 7 | ENE 7 | E 6 | ENE 6 | ENE 6 | ENE 6 | ENE 6 | ENE 7 | ENE 7 | ENE 7 | ENE 8 | ENE 9 | ENE 11 | ENE 11 | ENE 13 |
254 | 322 | 346 | 251 | 292 | 238 | 208 | 181 | 200 | 212 | 182 | 188 | 244 | 240 | 360 | 426 | 408 | 863 | 1347 | 1689 | 1711 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 49 | 49 | 49 | 49 | 49 | 49 | 49 | 49 | 49 | 49 | 58 | 49 | 50 | 109 | 49 | 56 | 109 | 49 | 109 | 150 | 16 |
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.











