Irmas/Leftpoint Surf Break

Lat Long: 21.29° N 157.66° W

Irmas/Leftpoint Surf Forecast and Surf Report

Issued: 1 am 25 Aug 2026 (local time)

Forecast update in  hr  min

Today's Irmas/Leftpoint sea temperature is
27.2°C
0.4° 

Irmas/Leftpoint surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


Irmas/Leftpoint surf forecast from 25 Aug 2026:

  • Most powerful swell: Thursday 27 Aug, 11AM (local time) - 4ft (1.2m), 17s period, S swell with 861 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 1.2m 17s and forecast to arrive on Thursday (Aug 27) 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 TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful11AM (Thu 27th Aug)4ft (1.2m) 17s

Table - best surf conditions forecast for Irmas/Leftpoint over the next 16 days.


The Lowdown

Alright folks, Rusty here. Let’s have a look at what’s cookin’ for Irmas/Leftpoint over the next couple of weeks.

Straight up, I gotta be honest with you – the next week and a half is lookin’ pretty grim. We’ve got a solid run of poor surf conditions from Tuesday the 25th of August all the way through to the end of the month. The wind is a big part of the problem. It’s blowin’ fresh from the ENE, mostly cross or cross-onshore, at 18 to 25 mph, which is gonna leave the surface all lumpy and messy. The swell is comin’ from the east, mainly short-period stuff around 7 seconds, with heights between 5 ft and 7 ft. It’s just not gonna be any fun out there. The combined wave energy is moderate, sitting in the 500-700 range, but that doesn’t help when the wind is wreckin’ it.

We do get a little break in the pattern on the 2nd of September. The wind backs off a touch to a moderate 12 mph, but it’s still cross-shore, and the swell switches to a long-period S swell at 16 seconds. The heights are small, around 3 ft to 3 ft, with moderate energy (636-784). It’s still a marginal call at best – not exactly a day to get excited about.

Now, here’s where it gets interesting. The real standout, the one to put a circle on your calendar, is Thursday the 3rd of September into the morning. For the first time in the outlook, we get a light onshore breeze from the ESE at just 3 mph. That’s almost glassy. The swell is a clean 4 ft from the east, with a solid 13-second period. That’s proper groundswell energy, and the combined energy is a solid 907. This is the best window we’ve got by a long shot. The water temperature is a warm 81°, which is about normal for this time of year. Irmas is a reef break, so that long-period swell will wrap in nicely here. The only downer is that crowds are possible, so get in early.

After that, we’re back into a bit of a messy pattern. The weekend of the 5th and 6th of September sees the swell size bump up to 7 ft to 7 ft from the ENE, with a mixed period of 7 to 12 seconds. The wind is moderate cross-shore, so the conditions are still marginal. The energy builds to strong levels, hitting 1084 and then 1668-1843 on the Sunday, but the cross-shore wind keeps it from being a clean, epic day. Waves over 7 ft are getting chunky – this is expert territory, especially with that cross-shore chop.

Into the second week, the 7th and 8th of September keep the same story: 5 ft to 6 ft ENE swell with a 12-second period, moderate cross-shore wind, and energy in the 1100 to 1500 range. It’s marginal, but nowhere near the quality of that Thursday morning. The 9th of September brings a fresh cross-onshore and lumpy 8 ft swell, which is a hard pass.

So, the long and short of it: if you can wait, the best surf on offer is the morning of Thursday the 3rd of September. It’s not a massive swell, but the light winds and long-period groundswell will make it a clean, rewarding session at Irmas. The rest of the window is a battle with the wind.

Rusty.

Short Range Forecast

Mostly dry. Warm (max 26°C on Tue morning, min 25°C on Tue night). Mainly strong winds.

Days 4-6 Weather Summary

Mostly dry. Warm (max 26°C on Fri afternoon, min 25°C on Fri morning). Mainly strong winds.

Tuesday
25
Wednesday
26
Thursday
27
Friday
28
Saturday
29
Sunday
30
Monday
31
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
0
0
0
0
0
0
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.9
E
7
1.6
E
7
1.8
E
7
1.7
ENE
6
0.7
S
18
0.8
S
19
1.2
S
17
0.9
S
16
1.1
S
16
0.8
S
14
0.9
S
14
1.7
ENE
7
1.9
ENE
7
1.9
ENE
7
2
ENE
7
2.2
ENE
7
1.8
ENE
7
1.9
ENE
7
1.7
ENE
7
1.9
ENE
7
2.1
ENE
8
Wave Graph
Metric surfscale
Energy kJ
345
262
289
237
307
458
861
427
590
260
329
240
307
307
372
471
324
338
270
339
494
Wind (km/h)
35
ENE
40
ENE
35
ENE
35
ENE
35
ENE
35
ENE
30
ENE
30
ENE
35
ENE
35
ENE
35
ENE
35
ENE
40
ENE
40
ENE
35
ENE
35
ENE
35
ENE
30
ENE
35
ENE
35
ENE
25
ENE
Wind State
cross-on
cross
cross-on
cross
cross
cross-on
cross
cross
cross-on
cross
cross
cross
cross-on
cross
cross-on
cross
cross
cross
cross
cross
cross
High Tide
1:56PM0.66m
1:55AM0.30m
2:25PM0.67m
2:30AM0.34m
2:53PM0.66m
3:07AM0.39m
3:21PM0.62m
3:47AM0.44m
3:48PM0.58m
4:31AM0.49m
4:17PM0.51m
5:19AM0.53m
4:46PM0.43m
Low Tide
9:09PM0.10m
7:36AM0.04m
9:29PM0.09m
8:15AM0.04m
9:49PM0.07m
8:57AM0.06m
10:10PM0.06m
9:43AM0.10m
10:32PM0.05m
10:34AM0.14m
10:56PM0.04m
11:35AM0.19m
11:23PM0.04m
clear
clear
clear
clear
clear
part cloud
clear
clear
clear
clear
clear
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:11
6:11
6:11
6:11
6:13
6:13
6:13
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:52
6:52
6:51
6:50
6:49
6:47
6:46
 mm
Temp °C
26
26
26
25
25
25
25
25
25
25
26
25
25
26
25
25
26
26
26
26
26
Feels °C
24
23
24
21
21
22
22
22
22
22
23
22
21
23
21
22
23
23
24
24
24
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  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
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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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