Surf Forecasts:
Irmas/Leftpoint surf forecast from 29 Aug 2026:
- Most powerful swell: Friday 4 Sep, 11AM (local time) - 7ft (2.2m), 12s period, ENE swell with 1,272 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 2.2m 12s and forecast to arrive on Friday (Sep 04) at 11AM. 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 17s period and expected on Saturday (Aug 29) at 11PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 11AM (Fri 4th Sep) | 7ft (2.2m) 12s |
Table - best surf conditions forecast for Irmas/Leftpoint over the next 16 days.
The Lowdown
Alright, Rusty here. Let’s talk about the next 16 days.
Alright, mate, I’m looking at the crystal ball for Irmas/Leftpoint and it’s a bit of a rough stretch ahead. The water temp is sitting around 81°, which is pretty much bang on average for this time of year, so no surprises there.
The outlook kicks off on Friday, 28 August, but it’s not a pretty picture. We’ve got a small S swell pushing in around 3 ft to 3 ft, with a long period of 14 seconds, but the wind is smashing it from the ENE at 22 mph. That’s a fresh cross-shore breeze, and the wave comment flat out calls it poor surf conditions. The combined energy is moderate (527), but it’s lumpy, messy, and not worth paddling out for. Honestly, the first several days are a write-off. Saturday the 29th through to the end of the month, the swell bumps up to 5 ft to 8 ft, but it’s shifting to a short-period, wind-driven ENE swell (6-8 seconds), and the wind stays cross-shore and strong. The energy climbs into the moderate to strong range (484 to 829), but it’s all lumpy cross-chop. On Monday the 31st, the morning swell hits 8 ft, and that’s already getting too big for beginners, but the wind is still ruining it.
As we roll into September, the first week is just more of the same. Tuesday the 1st sees the strongest wave energy so far at 1130, with a 8 ft ENE swell, but it’s still cross-shore and messy. The wind doesn’t let up. Wednesday the 2nd has a brief moment where a 3 ft S swell with a very long 16-second period shows up, giving a marginal rating, but the wind is still a fresh cross-shore. That long period would be beautiful at a reef or point, but the wind kills it. By Thursday the 3rd, it’s back to the usual ENE windswell.
The real standouts – if you can call them that – are few and far between. The best chance for something decent appears to be the last few days of the second week. On Friday, 4 September, we see a 7 ft to 8 ft swell from the ENE with a period of 11-12 seconds, which is a proper groundswell. The energy is very strong (1442-1536), but the wind is still cross-shore and fresh. It’s marginal, but it’s the best on offer. However, that swell size is pushing into expert territory. On Saturday the 5th and Sunday the 6th, the swell stays around 8 ft, but the period drops back to 9-10 seconds, and the wind gets even stronger. The energy is still strong (1132-1335), but it’s messy.
Then things get big. From Monday the 7th to Wednesday the 9th, the swell jumps to 10 ft to 13 ft, with very strong energy (1733 to 2867). The wind is a strong cross-shore, and the wave comment is still poor. This is expert-only, big, messy, and dangerous. Thursday the 10th is a write-off with a severe gale and risk of thunderstorms. The wind is onshore and totally blown out.
Finally, the last few days settle down. Friday the 11th has a 5 ft to 4 ft NE swell, with a lighter cross-onshore wind at 12 mph in the morning, shifting to a gentle onshore in the afternoon. The energy is weak (410-434), but it’s the cleanest the wind has been in weeks. Still, the wave comment says poor. Saturday the 12th has a tiny 2 ft SSW swell with a very long 16-second period, and a fresh cross-shore wind. The energy is weak (396), and with that long period, it’s gonna be a bit slow and straight at a point break.
So, what’s the best? Honestly, the standout is the 4th of September. That 7 ft ENE swell with a 12-second period has the most potential, but the wind is still a problem. It’s a promising but uncertain call. For the rest of the run, it’s a tough stretch of messy, windy conditions. This setup looks more interesting for kite surfing than paddle surfing on most days.
Rusty, signing off.
Short Range ForecastMostly dry. Warm (max 26°C on Sun afternoon, min 25°C on Fri morning). Mainly strong winds. | Days 4-6 Weather SummarySome drizzle, heaviest during Tue morning. Warm (max 26°C on Tue morning, min 25°C on Mon morning). Mainly fresh winds. | ||||||||||||||||||||
Friday 28 | Saturday 29 | Sunday 30 | Monday 31 | Tuesday 1 | Wednesday 2 | Thursday 3 | |||||||||||||||
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) | S 14 | S 14 | S 13 | ENE 6 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | S 16 | S 16 | ENE 8 | ENE 8 | ENE 8 | E 12 |
Wave Graph | |||||||||||||||||||||
260 | 329 | 229 | 201 | 214 | 512 | 419 | 348 | 383 | 550 | 514 | 661 | 723 | 573 | 434 | 427 | 412 | 374 | 460 | 398 | 887 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross | cross | cross | cross-on | cross | cross | cross-on | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross |
High Tide | 3:21PM0.62m | 3:47AM0.44m | 3:48PM0.58m | 4:31AM0.49m | 4:17PM0.51m | 5:19AM0.53m | 4:46PM0.43m | 6:14AM0.56m | 5:18PM0.36m | 7:19AM0.59m | 5:54PM0.28m | 8:36AM0.61m | 7:01PM0.22m | ||||||||
Low Tide | 8:57AM0.06m | 10:10PM0.06m | 9:43AM0.10m | 10:32PM0.05m | 10:34AM0.14m | 10:56PM0.04m | 11:35AM0.19m | 11:23PM0.04m | 12:53PM0.23m | 11:56PM0.04m | 2:47PM0.24m | 00:39AM0.05m | 5:18PM0.21m | 1:39AM0.06m | |||||||
6:11 | — | — | 6:13 | — | — | 6:13 | — | — | 6:13 | — | — | 6:13 | — | — | 6:13 | — | — | 6:13 | — | — | |
— | 6:50 | — | — | 6:49 | — | — | 6:47 | — | — | 6:46 | — | — | 6:45 | — | — | 6:45 | — | — | 6:45 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | 1 | — | — | — | — | — | — | — | — |
Temp °C | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 26 | 25 | 25 | 25 | 25 | 26 | 26 | 26 | 26 | 26 | 25 | 25 | 25 | 25 |
Feels °C | 22 | 22 | 22 | 21 | 21 | 22 | 21 | 22 | 22 | 22 | 22 | 22 | 24 | 24 | 25 | 24 | 24 | 23 | 22 | 22 | 22 |
Swell 1 Height (m) Direction Period (s) | S 14 | S 14 | S 13 | E 13 | E 12 | SSW 17 | SSW 16 | S 12 | SSW 15 | SSW 15 | SSW 14 | S 19 | SSW 18 | S 18 | S 17 | ENE 8 | S 16 | E 9 | S 14 | E 12 | E 12 |
260 | 329 | 229 | 171 | 106 | 186 | 171 | 100 | 199 | 146 | 138 | 192 | 329 | 314 | 364 | 372 | 401 | 168 | 206 | 193 | 887 | |
Swell 2 Height (m) Direction Period (s) | E 16 | E 15 | E 14 | S 13 | S 13 | S 12 | SSE 12 | SSW 16 | S 11 | S 11 | S 11 | S 10 | SSW 14 | S 12 | S 13 | S 16 | SSE 11 | S 15 | E 13 | S 14 | S 13 |
78 | 155 | 195 | 85 | 89 | 47 | 47 | 162 | 58 | 57 | 55 | 32 | 78 | 49 | 52 | 427 | 38 | 279 | 165 | 195 | 229 | |
Swell 3 Height (m) Direction Period (s) | SSW 11 | SSW 19 | SW 19 | S 13 | S 12 | SSW 12 | SSW 12 | S 20 | S 20 | SSW 18 | SSW 19 | SSW 14 | W 12 | SW 14 | SW 14 | SSE 10 | E 15 | E 13 | SSE 10 | SSE 10 | ESE 14 |
22 | 36 | 56 | 89 | 75 | 45 | 47 | 30 | 30 | 64 | 122 | 80 | 12 | 51 | 51 | 19 | 38 | 127 | 34 | 33 | 36 | |
Wind waves Height (m) Direction Period (s) | ENE 6 | ENE 6 | ENE 6 | ENE 6 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | NE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | NNE 6 |
167 | 142 | 212 | 201 | 214 | 512 | 419 | 348 | 383 | 550 | 514 | 661 | 723 | 573 | 434 | 253 | 412 | 374 | 460 | 398 | 57 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 49 | 109 | 49 | 50 | 109 | 56 | 56 | 64 | 49 | 56 | 58 | 49 | 50 | 58 | 49 | 49 | 56 | 49 | 49 | 109 | 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.











