Irmas/Leftpoint Surf Break

Lat Long: 21.29° N 157.66° W

Irmas/Leftpoint Surf Forecast and Surf Report

Issued: 7 pm 18 Aug 2026 (local time)

Forecast update in  hr  min

Today's Irmas/Leftpoint sea temperature is
26.7° C
0.0° 

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 19 Aug 2026:

  • Best quality surf: Thursday 20 Aug, 8PM (local time) - 2ft (0.6m), 17s period, SSW swell with cross-offshore winds.
  • Most powerful swell: Monday 24 Aug, 5AM (local time) - 8ft (2.5m), 7s period, E swell with 723 kJ wave energy.
  • Next surfable swell (1★+): Thursday 20 Aug, 8PM (local time) - 2ft (0.6m), 17s period with SSW swell.

Best Forecast Surf Conditions for Irmas/Leftpoint this week:

The surf forecast for Irmas/Leftpoint over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Thursday (Aug 20) at 8PM. The primary swell is predicted to be 0.6m and 17s period with a secondary swell of 1.0m and 7s. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Irmas/Leftpoint in the next 16 days are 2.5m 7s and forecast to arrive on Monday (Aug 24) at 5AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.7m 16s period and expected on Friday (Aug 21) at 2AM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+) 8PM (Thu 20th Aug)2ft (0.6m) 17s
Best Surf 8PM (Thu 20th Aug)2ft (0.6m) 17s
Most Powerful 5AM (Mon 24th Aug)8ft (2.5m) 7s

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


The Lowdown

Alright, Rusty here. Let’s have a look at the coming days at Irmas/Leftpoint.

Honestly, it’s a tough run for the next couple of weeks. The forecast is giving us a whole lot of messy, blown-out conditions with very little in the way of quality. The first surf that’s even worth a mention doesn’t show up until Thursday morning, the 20th of August, and even then it’s a marginal call.

Thursday, 20th August – Friday, 21st August
Thursday morning brings a small pulse of groundswell from the SSW, with waves around 2ft and a very long period of 18 seconds. That long period will produce some well-shaped lines, but the combined swell energy is still pretty weak (358). The wind is a gentle cross-shore, but the water is clean by the afternoon when the wind turns cross-offshore. It won’t be big, but for a patient surfer on a longboard, there might be a few clean, peeling waves. Thursday afternoon is the pick of this early window. Friday sees the swell flip to a short-period, weak NE windswell (103), and the cross-onshore breeze puts a stop to any hopes. A day to skip.

Saturday, 22nd August – Tuesday, 2nd September
This is where the forecast turns ugly. From Saturday morning, a strong and persistent ENE wind kicks in, blowing at 35-50 km/h (22-31 mph) almost daily. The swell builds from 4ft to over 6ft, and by Sunday the 24th the combined energy is moderate to strong (594 to 856). But with that wind being a strong cross-shore, the wave faces will be lumpy, messy, and full of cross-chop. It’s poor surf for a paddle board. If the wind holds at these speeds, a kite surfer might find this setup more interesting than a traditional surfer. This poor stretch carries on day after day, through the end of August, with the same ENE cross-wind and choppy conditions.

Tuesday, 1st September – The Lone Standout
Now, if you can hold out, there’s a date circled. On the morning of Tuesday, 1st September, something shifts. The combined swell energy jumps big time (2636), and the swell height hits 8ft from the east with a period of 13 seconds – a proper groundswell. But here’s the catch: the wind is still a fresh cross-shore (ENE 30 km/h / 19 mph). The afternoon gets even bigger, with 10ft waves and massive energy (3039). It’s a raw, powerful day, and because it’s over 8ft, this is strictly for experienced surfers only. The long period from the east might find the reef at Irmas and produce some heavy, grinding barrels, but that cross-shore wind will stop it from being perfect. It’s the best the whole fortnight has to offer, but it’s a rough, expert-only session with possible crowds.

After that, Wednesday and Thursday slip back into strong, messy wind and dropping swell. A blank, poor run for most of the month.

Stay patient, and maybe bring the kite gear.

Rusty.

Short Range Forecast

Mostly dry. Warm (max 26°C on Thu afternoon, min 24°C on Tue night). Wind will be generally light.

Days 5-7 Weather Summary

Light rain (total 4mm), mostly falling on Mon afternoon. Warm (max 26°C on Fri night, min 25°C on Fri night). Winds increasing (light winds from the ENE on Fri night, near gales from the ENE by Mon morning).

Wednesday
19
Thursday
20
Friday
21
Saturday
22
Sunday
23
Monday
24
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
1
1
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)
1.3
ENE
8
0.9
E
8
1.2
ENE
8
0.9
E
8
0.6
SSW
18
0.6
SSW
17
1.1
NE
7
0.9
NE
7
1.1
NE
7
0.8
SSW
16
1.3
ENE
7
1.6
ENE
7
2.3
E
7
2
E
7
2.1
E
7
2.4
ENE
7
2.2
E
7
2.2
E
8
2.3
E
8
Wave Graph
Metric surfscale
Energy kJ
181
109
176
102
207
202
119
79
109
322
137
212
517
360
402
532
515
650
692
Wind (km/h)
25
ENE
25
ENE
25
ENE
20
NE
15
NE
15
NNE
10
NE
10
E
20
ENE
20
ENE
35
ENE
35
ENE
40
ENE
40
ENE
40
NE
45
NE
50
ENE
30
E
40
ENE
Wind State
cross
cross
cross
cross
cross
cross-off
cross
cross-on
cross
cross-on
cross
cross
cross
cross
cross
cross
cross
cross-on
cross-on
High Tide
9:08AM0.53m
10:20AM0.55m
8:45PM0.20m
11:21AM0.57m
10:59PM0.20m
12:10PM0.60m
00:02AM0.21m
12:51PM0.62m
00:45AM0.24m
1:26PM0.65m
1:20AM0.27m
Low Tide
1:14AM0.09m
2:00AM0.10m
7:38PM0.20m
3:06AM0.11m
7:49PM0.17m
4:20AM0.10m
8:09PM0.14m
5:23AM0.08m
8:29PM0.12m
6:13AM0.06m
8:49PM0.11m
clear
part cloud
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
part cloud
thunderstorm
thunderstorm
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:09
6:09
6:09
6:11
6:11
6:11
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:58
6:57
6:57
6:55
6:54
6:53
6:52
 mm
4
11
Temp °C
25
25
25
25
25
26
26
26
26
26
26
26
25
25
25
25
26
26
25
Feels °C
23
25
25
24
26
28
29
29
28
27
24
23
23
22
22
22
21
23
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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