Irmas/Leftpoint Surf Break

Lat Long: 21.29° N 157.66° W

Irmas/Leftpoint Surf Forecast and Surf Report

Issued: 7 pm 14 Sep 2026 (local time)

Forecast update in  hr  min

Today's Irmas/Leftpoint sea temperature is
27.2°C
0.2° 

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 15 Sep 2026:

  • Most powerful swell: Thursday 17 Sep, 5PM (local time) - 7ft (2.2m), 9s period, ENE swell with 802 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 9s 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) 9s

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


The Lowdown

Alright, Rusty here. Let’s break down what’s on offer for this stretch.

To be straight with you, there’s nothing in the whole 16-day window that screams “grab the board and go.” The entire run from now through to the end of the month is one long quiet patch with messy, wind-affected conditions. There are no standout sessions, no windows where I’d tell you to drop everything.

Let’s run through it. From Tuesday morning, September 15th, through the 16th, we’ve got a small, short-period NE swell around 2 ft to 3 ft, but the wind is a consistent cross-shore with a moderate to fresh breeze. The water temperature feels about average for this time of year. The combined swell energy stays weak to moderate (141 to 169). Poor surf conditions are the story.

Then from the 17th of September onward, the swell bumps up — Thursday morning sees 7 ft of short-period ENE swell at 7 seconds, with a strong breeze and lumpy cross-chop. The combined energy climbs into moderate to strong territory (665 to 1022), but the quality is poor. That kind of size and onshore wind just turns it into a washing machine. By Thursday afternoon, it’s still only marginal at best.

Through the 18th to the 21st of September, the swell holds between 3 ft and 7 ft, with ENE and E directions, periods mostly short. A couple of longer-period SSW pulses roll through on the 18th (17 seconds, 3 ft), but the wind stays cross or cross-on, fresh to strong, and the break is a reef set-up. Even with that long-period groundswell, the wind and chop ruin any chance of a clean line. The energy values are strong — over 1100 at times — but with no decent wind, that energy just means a tough paddle and blown-out faces.

By the 22nd of September, it’s more of the same: 6 ft to 8 ft ENE/E, short period, strong cross-shore breeze. Poor conditions continue.

Into the final week — from the 25th of September through the 30th — the swell drops back. A few SSW pulses with 15-18 second periods appear (2 ft to 3 ft), and finally on the Tuesday afternoon (29th) and Wednesday morning (30th) we get a clean cross-offshore wind from the NNE at 12-18 mph. The sea state cleans up, but the swell is tiny — only 2 ft to 2 ft — and combined energy is moderate (382 to 434). It’s not enough to get excited about, just a marginal clean opportunity.

So bottom line: there are no good surf options in the entire 16-day window. The consistent onshore and cross-shore wind smashes every attempt at quality, and the clean spells only show up when the swell has dropped to near-flat. It’s one of those blank runs for the area. Forecasts can change, but as it stands, you’re better off keeping the board in the car and checking back later.

— Rusty

Short Range Forecast

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

Days 5-7 Weather Summary

Moderate rain (total 11mm), heaviest on Thu night. Warm (max 27°C on Fri morning, min 25°C on Sat night). Mainly strong winds.

Tuesday
15
Wednesday
16
Thursday
17
Friday
18
Saturday
19
Sunday
20
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
1
1
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)
0.7
NE
8
0.8
NE
8
0.9
NE
8
0.8
SSW
19
0.7
E
10
0.9
SSW
18
0.9
SSW
17
2.2
ENE
7
2.2
ENE
9
1
SSW
18
1
SSW
17
1
SSW
17
1
SSW
16
0.9
SSW
16
1.9
ENE
8
2
E
8
2.2
E
7
1.9
ENE
8
2.3
ENE
7
Wave Graph
Metric surfscale
Energy kJ
68
75
99
470
100
541
516
516
802
676
622
580
539
437
485
522
480
427
547
Wind (km/h)
15
ENE
20
ENE
25
NE
30
ENE
30
NE
30
NE
30
NE
35
ENE
30
ENE
30
ENE
30
ENE
35
ENE
30
ENE
30
ENE
35
ENE
30
ENE
35
ENE
35
ENE
35
ENE
Wind State
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross-on
cross
cross-on
cross-on
cross
cross-on
cross-on
cross-on
cross-on
High Tide
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
11:25AM0.57m
11:56PM0.25m
Low Tide
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
7:13PM0.13m
5:00AM0.13m
part cloud
part cloud
clear
part cloud
clear
clear
part cloud
part cloud
part cloud
thunderstorm
clear
clear
clear
clear
part cloud
part cloud
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:16
6:16
6:18
6:18
6:18
6:18
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:34
6:32
6:31
6:30
6:30
6:29
6:29
 mm
11
Temp °C
25
26
26
26
26
26
26
26
26
26
27
27
26
26
27
26
26
26
26
Feels °C
25
27
26
26
25
25
25
26
24
26
25
24
24
25
26
24
24
23
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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