Duds Reef Surf Break

Lat Long: 21.31° N 158.01° W

Duds Reef Surf Forecast and Surf Report

Issued: 1 pm 21 Jul 2026 (local time)

Forecast update in  hr  min

Today's Duds Reef sea temperature is
26.6° C
0.3° 

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 22 Jul 2026:

  • Best quality surf: Sunday 26 Jul, 5AM (local time) - 3ft (0.9m), 18s period, SSW swell with cross-offshore winds.
  • Most powerful swell: Monday 27 Jul, 11PM (local time) - 5.5ft (1.7m), 14s period, E swell with 1,145 kJ wave energy.
  • Next surfable swell (1★+): Sunday 26 Jul, 5AM (local time) - 3ft (0.9m), 18s 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 (Jul 26) at 5AM. The primary swell is predicted to be 0.9m and 18s period with a secondary swell of 0.6m and 15s. Another secondary swell of 1.6m and 7s 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 1.7m 14s and forecast to arrive on Monday (Jul 27) 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 1.2m 8s period and expected on Tuesday (Jul 28) at 2AM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+) 5AM (Sun 26th Jul)3ft (0.9m) 18s
Best Surf 5AM (Sun 26th Jul)3ft (0.9m) 18s
Most Powerful11PM (Mon 27th Jul)5.5ft (1.7m) 14s

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


The Lowdown

Right folks, Rusty here. Let’s have a look at what’s coming our way.

Alright, the next 16 days at Duds Reef are a real mixed bag, and if I’m being honest, things look pretty bleak for the first week. The forecast is calling for mostly marginal to poor conditions, with a persistent cross-shore breeze making a mess of things. The swell energy is there, but it’s not translating into good surf. You’ll be battling a moderate to fresh breeze and a lumpy cross-chop most days. The water temp is sitting at 80° with a tiny anomaly of 0.5°, so it’s about average for the time of year, no surprises there.

The first real stand-out, and it’s not much of a stand-out, is the morning of Thursday the 30th of July. The swell drops to 4ft from the ENE, with a period of 10 seconds. The wind turns light and cross-shore from the east at 9 mph, which is about as clean as it’s going to get. The combined swell energy is a moderate 549. It’s still marginal, but it’s the best of a bad bunch. Expect a touch of chop, but it should be rideable for the intermediate crew.

Then, hold onto your boardies, because the tail end of the window sees a big jump in size. On the morning of Saturday the 1st of August, the swell kicks up to 7ft from the east, but it’s short-period windswell at just 8 seconds. The wind is a fresh 19 mph cross-shore from the ENE, meaning the surface will be lumpy and messy. The combined energy is a moderate 807, but this is a real mess. That size, with that wind, and short period, is only for the experts, and even then, it’s not going to be pretty. This is more of a kite-surfing setup than a proper paddle surf session. The whole second week is looking like this: big, lumpy, onshore windswell. It’s a real shame.

So, to sum it up: the first week is a write-off with persistent cross-winds, and the second week gets big but messy. The morning of the 30th is your best bet for a clean wave, but don’t expect much. That’s the truth of it from Duds Reef.

Rusty.

Short Range Forecast

Light rain (total 2mm), mostly falling on Tue afternoon. Warm (max 27°C on Tue afternoon, min 24°C on Wed night). Winds increasing (light winds from the ENE on Tue night, fresh winds from the ENE by Thu morning).

Days 5-7 Weather Summary

Mostly dry. Warm (max 27°C on Fri afternoon, min 24°C on Fri night). Mainly fresh winds.

Tue
21
Wednesday
22
Thursday
23
Friday
24
Saturday
25
Sunday
26
Monday
27
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
1
0
0
0
1
0
0
1
0
1
0
1
1
2
1
1
2
2
1
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
S
14
1
S
13
0.6
SSW
24
0.6
SSW
23
1.3
E
12
0.9
SSW
20
0.7
SSW
20
1
SSW
18
0.7
SSW
18
0.9
SSW
17
0.8
SSW
16
0.8
SSW
19
1
SSW
18
1
SSW
18
1
SSW
16
1.2
E
16
1.3
E
15
1.3
E
14
1.3
E
14
1.7
E
14
Wave Graph
Metric surfscale
Energy kJ
311
342
437
426
480
561
395
616
329
428
298
502
692
662
568
696
746
687
682
1145
Wind (km/h)
25
E
15
ENE
35
ENE
25
ENE
25
ENE
35
ENE
35
ENE
30
ENE
35
ENE
35
ENE
30
ENE
35
ENE
30
ENE
15
ENE
30
ENE
30
ENE
25
ENE
20
ENE
25
ENE
20
ENE
Wind State
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
High Tide
7:33PM0.36m
11:52AM0.59m
12:45PM0.63m
10:43PM0.26m
1:30PM0.66m
00:28AM0.25m
2:09PM0.70m
1:28AM0.26m
2:45PM0.72m
2:12AM0.27m
3:17PM0.74m
2:51AM0.29m
Low Tide
6:02PM0.36m
3:27AM0.12m
4:16AM0.12m
9:32PM0.26m
5:13AM0.11m
9:33PM0.22m
6:08AM0.10m
9:50PM0.20m
6:58AM0.08m
10:10PM0.18m
7:41AM0.05m
10:32PM0.17m
rain showers
clear
clear
clear
clear
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:01
6:01
6:01
6:01
6:03
6:03
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:15
7:15
7:14
7:14
7:14
7:13
7:13
 mm
2
Temp °C
27
25
26
26
24
26
26
24
26
27
25
26
27
25
26
27
24
25
26
24
Feels °C
27
25
24
23
23
22
22
21
23
25
23
23
24
24
24
25
22
24
24
24
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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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