Duds Reef Surf Break

Lat Long: 21.31° N 158.01° W

Duds Reef Surf Forecast and Surf Report

Issued: 1 pm 09 Sep 2026 (local time)

Forecast update in  hr  min

Today's Duds Reef sea temperature is
27.2°C
0.2° 

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 10 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: Wednesday 16 Sep, 5PM (local time) - 3.5ft (1.0m), 18s period, SSW swell with 644 kJ wave energy.
  • Next surfable swell (1★+): Wednesday 9 Sep, 5PM (local time) - 3ft (0.9m), 13s 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 Wednesday (Sep 09) at 5PM. The primary swell is predicted to be 0.9m and 13s period. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Duds Reef in the next 16 days are 1.0m 18s and forecast to arrive on Wednesday (Sep 16) 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 1.1m 8s period and expected on Monday (Sep 14) at 2PM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+) 5PM (Wed 9th Sep)3ft (0.9m) 13s
Best Surf 5AM (Tue 15th Sep)2.5ft (0.7m) 21s
Most Powerful 5PM (Wed 16th Sep)3.5ft (1.0m) 18s

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


The Lowdown

G’day, Rusty here, and I’ve got the lowdown on the next 16 days for Duds Reef.

Right off the bat, we’ve got a little taste of clean surf this Wednesday afternoon. It’s not gonna be huge, but the swell is a solid 3 ft from the SSW, with a lovely long period of 13 seconds. The wind is glassy, making for some real smooth conditions, and the water sits at 81°, which is pretty much bang on average for this time of year. The combined energy is a moderate 312 – enough to get a few fun ones. For a Wednesday afternoon sesh, you could do a lot worse.

Now, things get a bit messy after that. Thursday through to next Monday morning, the wind turns cross or cross-on, gusting up to 22 mph, and the swell drops to small and weak. The energy readings are all over the place, but the wind just ruins it. A few days show marginal conditions, but honestly, it’s not worth paddling out for. You’re looking at a solid gap of poor surf, with only a couple of really marginal windows.

The first real standout comes next Monday afternoon, the 14th of September. The wind shifts to a cross-offshore breeze, and the swell jumps to 2 ft from the SW, but with a period of 22 seconds – that’s a proper long-period groundswell. The energy is solid at 328. For a reef break like Duds, that long period should mean some nice, clean lines, though the size is a bit small. Still, it’s the cleanest option in a while.

We’ve got another promising run around the 21st of September. Monday afternoon, the 21st, gives us a 5 ft easterly swell with a short 8-second period, but the wind goes dead calm – glassy as. The energy is moderate at 427. That’s a solid option, but remember, with a short period like that, the waves will be a bit more crumbly. The following Tuesday, the 22nd, keeps the 5 ft easterly swell, but with cross-shore wind, it’s a bit choppier. Still, the energy is up to 739, so there’s plenty of push.

The final highlight is on Wednesday afternoon, the 23rd of September. The swell drops to 2 ft from the SW, but with a 15-second period and glassy conditions. It’s a clean, fun little session, with energy reading 353.

Overall, the best on offer is that glassy Monday afternoon on the 21st with the 5 ft easterly swell. It’s not huge, but the wind is dead off, and the energy is there. If you can handle the short period, it’ll be a good one. The other standout is the 14th of September, with that long-period groundswell and clean wind. After that, the second week looks more promising but a bit inconsistent, so keep an eye on the forecasts.

Stay salty,
Rusty

Short Range Forecast

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

Days 5-7 Weather Summary

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

Wed
9
Thursday
10
Friday
11
Saturday
12
Sunday
13
Monday
14
Tuesday
15
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
2
2
0
0
0
0
1
2
0
0
2
1
0
1
0
2
2
1
2
2
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.9
SSW
13
0.7
SSW
13
0.6
SSW
16
0.6
SSW
18
0.7
SW
16
0.7
SW
16
0.7
SW
15
0.7
SW
15
0.7
SW
16
0.5
SW
16
0.6
SSW
13
0.5
SW
15
0.4
SSW
15
0.6
SSW
14
0.4
SSW
14
0.5
SW
22
0.5
SW
21
0.9
SW
20
0.8
SSW
19
0.9
SW
19
Wave Graph
Metric surfscale
Energy kJ
257
176
181
209
268
258
229
226
245
124
114
106
84
134
76
227
224
557
480
535
Wind (km/h)
5
SW
10
NE
20
ENE
25
ENE
20
ENE
15
ENE
15
ENE
10
NE
10
E
15
ENE
10
NE
15
E
15
ENE
15
NE
20
ENE
15
NE
10
NE
15
E
10
E
10
ENE
Wind State
glassy
cross-off
cross
cross
cross
cross
cross
cross-off
cross-on
cross
cross-off
cross
cross
cross-off
cross
cross-off
cross-off
cross-on
cross
cross
High Tide
2:52PM0.72m
3:14AM0.49m
3:25PM0.68m
3:53AM0.55m
3:54PM0.62m
4:32AM0.59m
4:21PM0.55m
5:11AM0.62m
4:46PM0.48m
5:51AM0.63m
5:07PM0.41m
6:35AM0.62m
5:22PM0.36m
Low Tide
9:31PM0.09m
8:56AM0.09m
9:53PM0.08m
9:45AM0.12m
10:14PM0.07m
10:32AM0.16m
10:36PM0.07m
11:21AM0.20m
10:57PM0.08m
12:14PM0.24m
11:18PM0.09m
1:19PM0.28m
11:41PM0.11m
part cloud
clear
part cloud
clear
clear
clear
clear
clear
clear
part cloud
clear
clear
clear
clear
part cloud
clear
clear
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>
6:39
6:39
6:38
6:37
6:37
6:36
6:35
 mm
Temp °C
28
27
26
28
26
26
27
25
26
27
26
27
28
26
27
28
26
28
28
27
Feels °C
32
32
27
27
26
25
26
25
26
26
26
27
27
26
27
28
28
30
30
30
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  • 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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