Irmas/Leftpoint Surf Break

Lat Long: 21.29° N 157.66° W

Irmas/Leftpoint Surf Forecast and Surf Report

Issued: 1 pm 11 Aug 2026 (local time)

Forecast update in  hr  min

Today's Irmas/Leftpoint sea temperature is
27.0° 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 12 Aug 2026:

  • Most powerful swell: Sunday 16 Aug, 2AM (local time) - 11ft (3.5m), 10s period, ENE swell with 2,977 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 3.5m 10s and forecast to arrive on Sunday (Aug 16) at 2AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 18s period and expected on Tuesday (Aug 18) at 8PM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful 2AM (Sun 16th Aug)11ft (3.5m) 10s

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


The Lowdown

Alright, this is a tough one to call. I’ve been staring at the charts for Irmas/Leftpoint (reef break) and honestly, the whole 16-day window is a bit of a struggle. The dominant wind is a persistent cross-shore from the ENE, and that’s just not doing us any favours. It’s creating a lumpy, cross-chop on the surface for most of the period, which is a real shame because the swell energy is actually there.

Let’s start with what we’ve got. On Tuesday the 11th, the swell is coming in from the SSW at 3 ft, period 14 seconds, with a combined energy of 545 (moderate). The water is sitting at 81°, which is about average for this time of year. But the wind... it’s a fresh 22 mph cross-shore, and the report says “poor surf conditions.” That’s the story for the next several days. Wednesday the 12th and Thursday the 13th are much the same – a bit of S swell, decent period (15-18 seconds), but that wind is just ruining the surface. The energy picks up into the moderate to strong range (897 to 1012), but the quality is just not there.

The first real standout for size comes on Friday the 14th afternoon. We see the swell jump to 7 ft from the ENE, but with a short period of 8 seconds. That’s a lot of bumpy, wind-affected water. The energy is 961 (moderate). Still, the wind is cross-shore at 22 mph, so it’s messy.

Saturday the 15th is where it gets big – and mean. The morning has 8 ft from the ENE (11 seconds, energy 1908 – strong), and by the afternoon it’s 10 ft from the ENE (11 seconds, energy 2423 – very strong). The wind is cranking, 28-31 mph cross-shore, turning into a near gale. This is experts-only territory, and even then, it’s going to be a washing machine. For the average surfer, this is a skip.

Sunday the 16th is the most interesting, but also the most dangerous. The wind finally swings offshore from the ESE at 22 mph in the morning and 16 mph from the SE in the afternoon. That’s pure offshore. The swell is 12 ft from the E in the morning, period 10 seconds, energy 2284 (very strong) and 10 ft in the afternoon. This is a massive, powerful, offshore wind day. For a reef break like Irmas/Leftpoint, these long-period (10s is moderate-long) swells can be phenomenal. But 10 – 12 ft is big, powerful, and definitely not for the faint of heart. It’s a standout for the sheer power and clean conditions, but only for experienced big-wave surfers.

The week after that, from Monday the 17th onwards, the swell drops back and the cross-shore wind returns. The energy levels drop from strong (1171) down to moderate (323) by the 19th. There’s a brief moment on Monday the 17th morning with a gentle 9 mph cross-onshore wind and 8 ft ENE swell, but it’s short-lived. The rest of the week is a mix of short-period windswell and those long-period southerly pulses that just get chopped up by the wind. By the 20th, we’re back to tiny 2 ft SSW swell.

The last week of the forecast, from the 22nd to the 26th, is more of the same. The swell stays small, mostly 2 ft to 5 ft, and the cross-shore wind never really lets up. There’s a late pulse of 7 ft from the ENE on the 26th afternoon, but with a 7-second period and strong cross-shore wind, it’s just messy.

So, the best on offer? It’s the Sunday the 16th. The offshore wind and the 10-12 ft swell from the E is a true, dangerous standout. But it’s a big call. The rest of the period is a frustrating mix of decent swell energy and poor wind. If you’re a beginner, stay away from the whole window. If you’re an expert, wait for that Sunday 16th.

Rusty.

Short Range Forecast

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

Days 5-7 Weather Summary

Heavy rain (total 40mm), heaviest during Sat night. Warm (max 27°C on Sun afternoon, min 25°C on Fri afternoon). Winds decreasing (severe gales from the ENE on Sat night, light winds from the E by Sun night).

Tue
11
Wednesday
12
Thursday
13
Friday
14
Saturday
15
Sunday
16
Monday
17
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
1
0
0
0
0
0
0
0
0
0
0
0
0
2
1
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)
0.8
SSW
14
0.6
S
20
0.9
S
18
1
S
18
1
S
16
1
S
16
1.2
S
15
1.1
S
15
1
S
14
2.1
ENE
8
2.3
ENE
8
2.5
ENE
11
3
ENE
11
3.5
ENE
10
3.5
E
10
3
E
10
3.5
ENE
10
2.3
ENE
9
2.1
ENE
8
2
ENE
8
Wave Graph
Metric surfscale
Energy kJ
269
268
509
613
520
501
653
537
411
520
721
1628
2161
2977
1996
1691
2216
773
575
462
Wind (km/h)
35
ENE
30
ENE
30
ENE
35
ENE
30
ENE
35
ENE
35
NE
35
ENE
35
ENE
35
NE
40
NE
45
NE
50
NE
60
NE
35
ESE
25
SE
15
ESE
15
ENE
35
ENE
35
ENE
Wind State
cross
cross-on
cross
cross
cross-on
cross
cross
cross
cross
cross
cross
cross
cross
cross
on
on
on
cross-on
cross
cross
High Tide
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
5:55AM0.48m
5:21PM0.47m
6:52AM0.50m
5:48PM0.38m
Low Tide
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
11:53AM0.20m
00:11AM0.05m
1:08PM0.25m
00:39AM0.07m
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:07
6:07
6:07
6:09
6:09
6:09
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:02
7:02
7:01
7:00
7:00
7:00
6:59
 mm
2
15
11
4
5
3
1
Temp °C
26
25
25
25
26
26
26
25
26
26
25
26
26
26
26
27
27
26
26
25
Feels °C
24
23
23
22
24
24
23
22
23
23
22
23
23
22
23
27
28
29
26
24
  • Map Icons:
  • Break
  • 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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