Irmas/Leftpoint Surf Break

Lat Long: 21.29° N 157.66° W

Irmas/Leftpoint Surf Forecast and Surf Report

Issued: 1 am 13 Sep 2026 (local time)

Forecast update in  hr  min

Today's Irmas/Leftpoint sea temperature is
27.3°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 13 Sep 2026:

  • Most powerful swell: Thursday 17 Sep, 5PM (local time) - 7ft (2.2m), 10s period, ENE swell with 904 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 10s and forecast to arrive on Thursday (Sep 17) at 5PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 18s period and expected on Wednesday (Sep 16) at 8AM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful 5PM (Thu 17th Sep)7ft (2.2m) 10s

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


The Lowdown

Alright, Rusty here again, giving you the lowdown in feet and miles per hour.

Mate, I’m not gonna sugarcoat it. This entire 16-day window is a rough one for Irmas/Leftpoint. The trade winds are gonna be blowing from the ENE nearly non-stop, and they’re not light either. That’s going to put a nasty chop on the water and wreck the wave faces at this reef. The water temp is 81°, pretty normal for this time of year.

Right out of the gate on Sunday, September 13th, and through the first week, the surf is small and sloppy. We’re talking waist to chest-high waves (3 ft to 4 ft) from the NNE or NE, with short periods of 6 to 9 seconds. The wind is cross-shore the whole time, so it’s just messy. Not worth getting wet for.

Mid-week on Wednesday, September 16th, a new, longer-period groundswell tries to push in from the SSW (18 seconds) but the height drops to just 3 ft while the wind is still cross.

The size picks up big time from Thursday, September 17th, with waves reaching 7 ft to 7 ft from the ENE. The wave energy gets strong (in the 1000+ range), but that ENE cross-wind is now blowing a fresh to strong breeze (25-28 mph), making it a washing machine out there.

Friday, September 18th, is the first time we see a ‘marginal’ score. The morning is poor, but the afternoon shows a 3 ft swell from the SSW with a 17-second period and the wind is cross. The energy is huge (over 1100), but the wind chop is still there.

The best chance for some decent power comes around Monday, September 23rd. The swell from the east picks up to 7 ft to 7 ft with a period of 10-11 seconds. The energy is very strong (1266). The wind is still from the ENE at 22 mph, so it’s still a cross-shore mess, but the size and period are the best of the whole period. This is expert territory only – 7 ft waves with chop are no joke.

The tail end of the forecast, from September 24th to 28th, is a rinse-repeat of the same: 5 ft to 8 ft swell from the ENE or NE, with the wind staying fresh to strong and cross or cross-onshore. The energy stays high, but the quality stays poor to marginal.

So here’s the deal: there are no clean, all-day sessions in this 16-day stretch. The wind is the main problem. If you’re absolutely jonesing for a paddle and you’re a strong surfer, the 23rd of September has the biggest, most powerful swell. It’s the best on offer, but it’s still a battle with the wind. That’s the honest truth. Rusty out.

Short Range Forecast

Mostly dry. Warm (max 26°C on Mon afternoon, min 25°C on Sun morning). Mainly fresh winds.

Days 4-6 Weather Summary

Light rain (total 9mm), mostly falling on Fri morning. Warm (max 27°C on Fri morning, min 25°C on Wed night). Mainly fresh winds.

Sunday
13
Monday
14
Tuesday
15
Wednesday
16
Thursday
17
Friday
18
Saturday
19
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
0
0
0
0
0
0
0
0
0
0
1
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)
0.9
NNE
9
0.9
NNE
9
0.9
NE
9
0.9
NE
8
0.8
NE
8
0.4
SSW
13
0.8
NE
8
1.1
NE
8
0.8
SSW
19
1.3
ENE
6
0.9
SSW
18
1.7
ENE
6
2.1
ENE
10
2.2
ENE
10
2.2
ENE
9
1
SSW
17
1
SSW
17
2.1
E
8
2
E
8
2
ENE
8
2.4
E
8
Wave Graph
Metric surfscale
Energy kJ
135
138
115
100
80
68
88
128
470
97
541
213
846
904
724
622
580
573
522
497
653
Wind (km/h)
20
ENE
25
NE
20
ENE
25
ENE
25
NE
20
ENE
25
ENE
30
NE
30
ENE
35
ENE
35
NE
35
NE
40
NE
35
NE
35
ENE
30
ENE
30
ENE
25
ENE
25
ENE
30
ENE
30
ENE
Wind State
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross-on
cross-on
cross
cross-on
cross-on
cross
cross-on
High Tide
4:10PM0.44m
5:15AM0.59m
4:37PM0.37m
6:02AM0.58m
5:04PM0.30m
6:56AM0.56m
5:30PM0.25m
8:04AM0.54m
6:18PM0.21m
9:21AM0.54m
9:37PM0.19m
10:30AM0.55m
11:10PM0.22m
Low Tide
10:58AM0.16m
10:34PM0.05m
11:57AM0.20m
10:58PM0.06m
1:10PM0.23m
11:24PM0.09m
2:59PM0.23m
11:56PM0.11m
5:49PM0.21m
00:44AM0.14m
6:28PM0.17m
2:11AM0.15m
6:51PM0.15m
3:49AM0.15m
clear
clear
clear
clear
clear
part cloud
part cloud
clear
clear
clear
clear
part cloud
part cloud
part cloud
thunderstorm
thunderstorm
clear
clear
thunderstorm
part cloud
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:16
6:16
6:16
6:16
6:18
6:18
6:18
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:35
6:34
6:32
6:31
6:30
6:30
6:29
 mm
5
4
1
Temp °C
25
25
25
25
26
25
26
26
26
26
26
26
26
26
26
27
27
26
26
26
26
Feels °C
24
24
24
24
25
24
26
26
26
25
24
25
24
24
25
26
25
25
26
24
26
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
Map placeholder
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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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