Duds Reef Surf Break

Lat Long: 21.31° N 158.01° W

Duds Reef Surf Forecast and Surf Report

Issued: 1 am 12 Sep 2026 (local time)

Forecast update in  hr  min

Today's Duds Reef sea temperature is
27.5°C
0.5° 

Duds Reef surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


Duds Reef surf forecast from 12 Sep 2026:

  • Best quality surf: Tuesday 15 Sep, 5AM (local time) - 2.5ft (0.7m), 21s period, SW swell with cross-offshore winds.
  • Most powerful swell: Thursday 17 Sep, 11PM (local time) - 4ft (1.2m), 18s period, SSW swell with 826 kJ wave energy.
  • Next surfable swell (1★+): Sunday 13 Sep, 5PM (local time) - 1.5ft (0.4m), 15s period with SSW swell.

Best Forecast Surf Conditions for Duds Reef this week:

The surf forecast for Duds Reef over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Sunday (Sep 13) at 5PM. The primary swell is predicted to be 0.4m and 15s period with a secondary swell of 0.5m and 5s. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Duds Reef in the next 16 days are 1.2m 18s and forecast to arrive on Thursday (Sep 17) at 11PM. 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 4s period and expected on Monday (Sep 14) at 8PM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+) 5PM (Sun 13th Sep)1.5ft (0.4m) 15s
Best Surf 5AM (Tue 15th Sep)2.5ft (0.7m) 21s
Most Powerful11PM (Thu 17th Sep)4ft (1.2m) 18s

Table - best surf conditions forecast for Duds Reef over the next 16 days.


The Lowdown

Alright folks, Rusty here with a look at what’s heading our way over the next couple of weeks. Right off the bat, I gotta be straight with you – it’s a tough one. The first couple of weeks are looking pretty average with those onshore cross-shore breezes making a mess of things.

We’ve got Duds Reef on the menu. Over the next week and a half, we’re looking at mostly small 1 ft to 4 ft swell, mostly from the SW. The problem is that persistent ENE wind. It’s cross-shore, but it’s gonna be choppy, so you’re going to be fighting it. Raw numbers show moderate energy creeping up there (around 356 to 921 units), but it’s all on the wrong side of the wind. Rarely does the quality pop. There are glimmers on Sunday 13th afternoon late with a clean cross-off wind on a tiny 1 ft SSW swell, and again on the 24th and 25th of September when the wind goes glassy in the afternoon. Those late-September afternoons will see a clean 2 ft to 3 ft SW groundswell (14-16 second period). That period is nice and long, a proper groundswell, but at this size, it’s just a clean little knee-to-waist high wave for the intermediate crowd. The energy is still moderate at best (around 626-697 units).

Look, if you’re an absolute beginner, this stretch will be tough. Most of the swell is below 5 ft, so you won't get washed away, but the constant chop is no fun. There’s an uptick in size around the 17th and 20th of September with some 6 ft to 6 ft E swell, but those are on 8-second windswell with howling 19-22 mph cross-shore winds. That’s lumpy, messy, and definitely one for the experts only if you're feeling masochistic. For the rest of us, it’s a waiting game for that glass-off in the last week. The water temperature is about average for the time of year, a little cooler in the mornings but nothing crazy.

I can't point to a true stand-out banger in this window. The best of a bad bunch is that Thursday 24th and Friday 25th of September with the glassy afternoons and long-period SW swell. That’s your call. If you’ve got a log and a prayer, that’s your window. Otherwise, it’s time to wax the kite – that strong cross-shore chop from the 16th to the 21st looks way more interesting for flying a kite than trying to paddle out.

Stay patient, gang. Rusty out.

Short Range Forecast

Mostly dry. Warm (max 28°C on Sat afternoon, min 24°C on Sun night). Wind will be generally light.

Days 4-6 Weather Summary

Mostly dry. Warm (max 28°C on Tue afternoon, min 25°C on Tue morning). Mainly fresh winds.

Saturday
12
Sunday
13
Monday
14
Tuesday
15
Wednesday
16
Thursday
17
Friday
18
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
1
1
1
0
1
1
0
0
0
1
1
1
0
0
1
0
1
1
1
0
2
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
SW
16
0.5
SW
16
0.6
SSW
13
0.5
SW
15
0.4
SSW
15
0.6
SSW
14
0.3
SW
24
0.5
SW
22
0.5
SW
21
0.9
SW
20
0.8
SSW
19
0.9
SW
19
0.9
SSW
18
0.9
SSW
18
0.9
SSW
17
0.8
SSW
16
1.7
E
10
1.2
SSW
18
1.1
SSW
17
1.1
SSW
17
1.1
SSW
16
Wave Graph
Metric surfscale
Energy kJ
245
124
116
107
84
134
87
227
224
557
480
535
541
541
510
322
550
826
725
675
627
Wind (km/h)
15
E
10
E
10
ENE
15
E
5
NNE
10
NE
25
E
20
ENE
15
ENE
20
E
20
ENE
25
ENE
35
ENE
30
ENE
25
NE
35
ENE
30
ENE
25
ENE
30
ENE
30
ENE
15
ENE
Wind State
cross
cross
cross
cross
cross-off
cross-off
cross
cross
cross
cross
cross
cross
cross
cross
cross-off
cross
cross
cross
cross
cross
cross
High Tide
4:21PM0.55m
5:11AM0.62m
4:46PM0.48m
5:51AM0.63m
5:07PM0.41m
6:35AM0.62m
5:22PM0.36m
7:27AM0.60m
5:15PM0.31m
8:35AM0.57m
10:01AM0.57m
Low Tide
10:32AM0.16m
10:36PM0.07m
11:21AM0.20m
10:57PM0.08m
12:14PM0.24m
11:18PM0.09m
1:19PM0.28m
11:41PM0.11m
3:06PM0.30m
00:08AM0.13m
00:43AM0.16m
1:55AM0.18m
clear
clear
clear
clear
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:18
6:18
6:18
6:18
6:18
6:18
6:18
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:37
6:37
6:36
6:35
6:34
6:32
6:31
 mm
Temp °C
27
28
26
26
27
26
26
27
26
27
28
27
27
28
26
27
28
26
27
28
26
Feels °C
27
28
27
26
27
27
24
25
26
28
28
28
25
26
25
25
26
25
25
27
25
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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 Duds Reef Surf forecast

The above surf forecast table for Duds Reef provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Duds Reef can be found by selecting the local surf guide option on the grey menu. Our Duds Reef 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 (Duds Reef) 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 Duds Reef 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.

Duds Reef is 0 km (0 miles) from 'Ewa Beach. If you plan a vacation in Oahu, look for hotels and other accommodation in 'Ewa Beach. 'Ewa Beach has rooms for a wide range of budgets as well as car hire and transport links.

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