Duds Reef Surf Break

Lat Long: 21.31° N 158.01° W

Duds Reef Surf Forecast and Surf Report

Issued: 1 pm 09 Aug 2026 (local time)

Forecast update in  hr  min

Today's Duds Reef sea temperature is
27.1° 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 10 Aug 2026:

  • Best quality surf: Sunday 16 Aug, 2AM (local time) - 13ft (4.0m), 13s period, ENE swell with cross-offshore winds.
  • Most powerful swell: Sunday 16 Aug, 2AM (local time) - 13ft (4.0m), 13s period, ENE swell with 4,937 kJ wave energy.
  • Next surfable swell (1★+): Thursday 13 Aug, 5AM (local time) - 4.5ft (1.4m), 16s period with S 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 Thursday (Aug 13) at 5AM. The primary swell is predicted to be 1.4m and 16s period with a secondary swell of 1.1m and 6s. 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 4.0m 13s and forecast to arrive on Sunday (Aug 16) at 2AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.6m 6s period and expected on Sunday (Aug 16) at 8PM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+) 5AM (Thu 13th Aug)4.5ft (1.4m) 16s
Best Surf 2AM (Sun 16th Aug)13ft (4.0m) 13s
Most Powerful 2AM (Sun 16th Aug)13ft (4.0m) 13s

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


The Lowdown

Right, let’s cast an eye over the 16 days ahead. To be straight with you, it’s a bit of a slow burn here, and the first real chance of anything decent doesn’t pop up until well into the second week. For the opening run, we’re looking at a lot of grotty cross-shore winds and poor surf conditions, with a couple of windows of marginal stuff that are best skipped.

Things look pretty bleak right through from Sunday the 9th through to Thursday the 14th. That’s nearly a full week of moderate to fresh cross-shore winds mucking up a small, short-period swell. The wave energy is moderate, getting up around the 500 to 600 mark, but with that 15 to 19 mph breeze from the ENE, it’s all chop and no hope. There’s a small window on the morning of Monday the 10th with a 2ft swell, but with a 15-second period and cross-shore wind, it’s not making the most of that long-period groundswell. Best to leave the board on the sand for those days.

Now, come Saturday the 15th, things start to change. The swell builds in from the east. Through the morning we’re looking at a 7ft swell from the east with a moderate 12-second period, and the wind is starting to swing cross-offshore from the NE at 19 mph. That’s a step up, but the real standout window lands on Sunday the 16th and into Monday the 17th.

Duds Reef is the spot to keep in mind. On Sunday morning the 16th, the wind drops right out to a glassy 3 mph from the north. That’s a game-changer. The swell is pumping at a solid 12ft from the ENE, with a 13-second period. That’s a proper groundswell with plenty of power — the combined energy is over 4000, which is strong. This is going to be a serious, clean, powerful reef break. The water temperature is about 81°F, which is bang on normal for this time of year. Because it’s a reef, that long-period swell will line up nicely, but an 12ft wave is only for experienced surfers. The afternoon holds similar conditions, though there’s a risk of thunderstorms, so keep an eye on the sky. The crowds at Duds Reef can show up sometimes, so on a day this good, expect a few others in the water.

After that, it looks like the swell fades back down again through Monday the 17th and into the rest of the week, with winds shifting around and the quality dropping back to poor or marginal at best.

So, if you’ve got the skill and you’re keen, keep the weekend of the 15th and 16th marked. Sunday the 16th is the absolute pick. Glassy conditions, big swell from the east, and Duds Reef doing what it does best. It’s a promising outlook for a few hours of clean, chunky reef waves for the crew who can handle it. For anyone else, it’s a waiting game until the next proper pulse, which isn’t showing yet.

- Rusty

Short Range Forecast

Mostly dry. Warm (max 29°C on Mon afternoon, min 25°C on Sun night). Mainly fresh winds.

Days 5-7 Weather Summary

Mostly dry. Warm (max 28°C on Thu morning, min 24°C on Wed night). Mainly fresh winds.

Sun
9
Monday
10
Tuesday
11
Wednesday
12
Thursday
13
Friday
14
Saturday
15
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
1
0
1
0
0
2
1
1
1
1
0
1
0
0
3
2
5
9
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.3
ENE
8
0.8
SSW
16
0.6
SSW
15
0.7
SSW
15
0.7
SSW
15
0.7
SSW
14
0.9
SSW
14
0.7
S
20
1
S
18
1.1
S
18
1.4
S
16
1.4
S
16
1.3
S
15
1.3
S
15
1.2
S
14
1.1
S
14
1.8
E
10
2.1
E
12
3.5
ENE
13
4
ENE
13
Wave Graph
Metric surfscale
Energy kJ
196
288
184
234
237
218
356
373
627
741
1029
991
763
743
602
496
643
1174
3501
4937
Wind (km/h)
25
ENE
25
ENE
25
ENE
25
ENE
20
ENE
25
ENE
30
ENE
15
NE
30
ENE
25
ENE
25
ENE
30
ENE
30
ENE
25
NE
30
ENE
30
ENE
25
NE
30
NE
30
NE
10
NNE
Wind State
cross
cross
cross
cross
cross
cross
cross
cross-off
cross
cross
cross
cross
cross
cross-off
cross
cross
cross-off
cross-off
cross-off
cross-off
High Tide
1:39AM0.27m
2:43PM0.83m
2:33AM0.31m
3:23PM0.83m
3:22AM0.36m
3:59PM0.80m
4:08AM0.41m
4:32PM0.75m
4:55AM0.46m
5:02PM0.68m
5:41AM0.50m
5:29PM0.60m
Low Tide
9:29PM0.15m
7:07AM0.02m
9:56PM0.13m
8:02AM0.01m
10:23PM0.11m
8:53AM0.02m
10:50PM0.10m
9:42AM0.06m
11:15PM0.09m
10:30AM0.11m
11:40PM0.09m
11:19AM0.18m
00:04AM0.09m
clear
clear
clear
clear
clear
clear
clear
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:07
6:09
6:09
6:09
6:09
6:09
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:06
7:05
7:05
7:04
7:02
7:02
7:01
 mm
Temp °C
28
26
28
29
26
27
28
25
27
27
25
28
28
25
27
28
25
28
28
25
Feels °C
26
27
27
27
26
25
26
25
25
24
24
26
25
23
24
25
24
26
26
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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