Duds Reef Surf Break

Lat Long: 21.31° N 158.01° W

Duds Reef Surf Forecast and Surf Report

Issued: 1 am 14 Sep 2026 (local time)

Forecast update in  hr  min

Today's Duds Reef sea temperature is
27.4°C
0.4° 

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 14 Sep 2026:

  • Best quality surf: Saturday 19 Sep, 2AM (local time) - 3.5ft (1.1m), 16s period, SSW swell with cross-offshore winds.
  • Most powerful swell: Friday 18 Sep, 2AM (local time) - 4ft (1.2m), 18s period, SSW swell with 826 kJ wave energy.
  • Next surfable swell (1★+): Monday 14 Sep, 8PM (local time) - 1.5ft (0.5m), 22s period with SW 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 Monday (Sep 14) at 8PM. The primary swell is predicted to be 0.5m and 22s period with a secondary swell of 0.4m and 13s. Another secondary swell of 0.6m and 4s is also forecast. 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 Friday (Sep 18) 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 1.2m 5s period and expected on Wednesday (Sep 16) at 8PM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+) 8PM (Mon 14th Sep)1.5ft (0.5m) 22s
Best Surf 2AM (Sat 19th Sep)3.5ft (1.1m) 16s
Most Powerful 2AM (Fri 18th Sep)4ft (1.2m) 18s

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


The Lowdown

Alright folks, Rusty here. Let’s get into it. We’ve got a mixed bag of a forecast for Duds Reef coming up, and I won’t lie to you – the first couple of weeks are a bit of a struggle. This spot is a reef break that’s fairly consistent, but don’t let that fool you; for a good stretch, the conditions just aren’t playing ball. The wind is a constant cross-shore, gusty at times, and the swell quality, while the period is often long (groundswell), just isn't being matched with clean winds. It's a frustrating combo.

The most promising surf is right at the tail end of the forecast window, so you’ll need some patience.

Right now, Monday the 14th, it’s a write-off. Tiny 1 ft swell and messy cross-chop from an ENE wind at 12 mph. Not worth getting wet. Tuesday the 15th and Wednesday the 16th tease us with a bit more size – around 2.5 to 3 ft – but the wind is still a problem, blowing cross-shore with moderate to fresh strength. The wave energy is moderate to strong (readings like 625 and 668), but with the lumpy conditions, it’s all just a chop-fest. Not surfable.

Thursday the 17th sees a shift in the swell direction to ENE, but with a short period of just 10 seconds and a strong cross-wind from the same ENE direction at 16 mph, it’s still rough. Swell height bumps up to 5 ft to 6 ft, and the energy is strong (1009 to 1162), but the wind is just wrecking it. For an intermediate break, that's a lot of chop to deal with. From there, we slide into a real dry spell.

From Friday the 18th all the way through to about Thursday the 24th, the outlook is pretty grim. The wind stays cranky from the ENE, mostly at 19-22 mph, and the surf quality is rated as poor. The swell drops back to 2.5 ft to 4 ft with periods dropping as low as 8 seconds. The energy is still moderate to strong in the readings (around 500 to 900), but the wind makes it a no-go. This is a solid 6 to 7 days of nothing worth paddling out for. Honestly, for this stretch, the setup looks more interesting for kite surfing than paddle surfing.

Now, hang in there, because things start to look promising on Saturday the 26th. The wind finally drops out. On Saturday morning, the wind is from the south at just 3 mph, turning into a light cross-onshore. The swell sticks around 3 ft from the SSW with a decent 15-second period. But by Saturday afternoon, it gets glassy. A light southerly at 3 mph turns it to glass. The energy is moderate (603), and we get an “expect very good surf conditions” rating. That’s the first real glimmer of hope.

Sunday the 27th is more of the same goodness – glassy conditions again in the afternoon with a light NE wind. Swell stays a clean 3 ft from the SSW with a 15-second period. Beautiful.

But the real standout, the one day you should be clearing your schedule for, is Monday the 28th. The morning shows glassy conditions with a light SSW wind at 3 mph. The swell is a clean 3.5 ft from the SSW with a very long, powerful 18-second period (groundswell). The wave energy is strong (964). This is deep, powerful groundswell with perfect, clean conditions. For a reef break like Duds Reef, that long period will give you proper, lined-up walls, and the glassy wind will make it look like a pool. Crowds are possible here sometimes, but on a Monday, you might get a few sets to yourself.

Tuesday the 29th still offers hope with glassy conditions again in the afternoon, with a 3 ft SSW swell at 16 seconds. Energy is still strong (918). It's a solid follow-up to Monday.

So, the verdict: suffer through the first week and a half. The absolute best is Monday the 28th of September – a standout day with clean, glassy conditions and a strong, long-period groundswell. That's the one to circle. The water temperature is a warm 81.3°, which is about normal for this time of year, so you’ll be fine in boardies.

Short Range Forecast

Mostly dry. Warm (max 29°C on Tue afternoon, min 25°C on Mon morning). Wind will be generally light.

Days 4-6 Weather Summary

Light rain (total 2mm), mostly falling on Thu night. Warm (max 28°C on Thu afternoon, min 26°C on Thu morning). Mainly fresh winds.

Monday
14
Tuesday
15
Wednesday
16
Thursday
17
Friday
18
Saturday
19
Sunday
20
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
1
1
1
1
1
1
0
2
2
1
2
1
1
4
0
0
1
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)
0.3
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
1.6
ENE
10
1.8
ENE
10
1.2
SSW
18
1.1
SSW
17
1.1
SSW
17
1.1
SSW
16
1
SSW
16
1
SSW
16
1.5
E
8
1.8
E
7
0.9
SSW
15
0.9
SSW
14
Wave Graph
Metric surfscale
Energy kJ
87
227
224
557
480
535
541
541
510
454
567
826
725
675
635
506
512
295
316
370
366
Wind (km/h)
20
ENE
15
E
15
ENE
15
E
20
ENE
20
ENE
25
ENE
30
ENE
25
NE
25
ENE
25
ENE
20
ENE
30
E
25
E
15
ENE
25
E
30
ENE
20
ENE
35
ENE
30
ENE
25
ENE
Wind State
cross
cross
cross
cross
cross
cross
cross
cross
cross-off
cross
cross
cross
cross
cross
cross-off
cross-on
cross
cross
cross
cross
cross
High Tide
5:07PM0.41m
6:35AM0.62m
5:22PM0.36m
7:27AM0.60m
5:15PM0.31m
8:35AM0.57m
10:01AM0.57m
11:19AM0.58m
11:43PM0.23m
12:15PM0.61m
00:42AM0.27m
Low Tide
12:14PM0.24m
11:18PM0.09m
1:19PM0.28m
11:41PM0.11m
3:06PM0.30m
00:08AM0.13m
00:43AM0.16m
1:55AM0.18m
8:04PM0.21m
8:03PM0.18m
clear
clear
part cloud
clear
clear
clear
clear
clear
part cloud
part cloud
clear
thunderstorm
clear
clear
thunderstorm
part cloud
clear
part cloud
cloud
clear
part cloud
<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
6:20
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:36
6:35
6:34
6:32
6:31
6:30
6:30
 mm
1
1
Temp °C
27
28
26
28
29
27
28
29
26
27
28
26
28
28
26
27
28
26
27
27
26
Feels °C
27
27
27
29
29
28
28
29
26
28
28
26
26
25
27
27
27
25
25
25
25
  • Map Icons:
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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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