Duds Reef Surf Break

Lat Long: 21.31° N 158.01° W

Duds Reef Surf Forecast and Surf Report

Issued: 1 am 13 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 13 Sep 2026:

  • Best quality surf: Monday 14 Sep, 2AM (local time) - 2ft (0.6m), 14s 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, 2AM (local time) - 2ft (0.6m), 14s 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 Monday (Sep 14) at 2AM. The primary swell is predicted to be 0.6m and 14s period with a secondary swell of 0.5m and 4s. 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 0.9m 4s period and expected on Monday (Sep 14) at 8PM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+) 2AM (Mon 14th Sep)2ft (0.6m) 14s
Best Surf 2AM (Mon 14th Sep)2ft (0.6m) 14s
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

G'day, I'm Rusty. Let's have a look at what's on the cards for the next couple of weeks at Duds Reef.

Honestly, it's a bit of a grim stretch ahead. We're looking at a long run of mostly poor conditions. The wind is going to be a real problem—stuck cross-shore from the east or east-northeast for days on end, and often fresh to strong. That's going to chop things up pretty badly. The swell is small to moderate, but the real issue is that constant cross-breeze. We've got a solid 16-day window but don't expect much for the first week and a half. There's a gap of many days here with no real recommendations to get excited about.

Sunday the 13th? Tiny swell, only 2 ft from the southwest, but the period is a very long 15 seconds. That's a groundswell. Combined wave energy is 223 (moderate). Wind is 9 mph cross-shore. It's a reef break, so that long period might actually suit it, but the swell is just too small to be worth paddling out. Water temp is about average for this time of year.

Monday the 14th is even smaller—1 ft to 2 ft from the southwest, with a crazy long 22 to 24-second period. Wind picks up to 12 mph cross-shore. Just not enough push. The combined energy is 174 to 324 (moderate). Not worth the effort.

Tuesday the 15th shows a slight lift: 3 ft from the southwest on the morning, period 20 seconds. Combined energy 611 (moderate). Wind is still 9 mph cross-shore, but that's a lot of water moving on a long period. The afternoon gets 3 ft from the south-southwest. Still marginal—the wave comment says questionable tide conditions.

Wednesday the 16th is a write-off: 3 ft swell but wind howling at 19 mph cross-shore. Combined energy around 692 (moderate). Lumpy as hell.

Thursday the 17th is our first real standout—the only one worth mentioning. By the afternoon, we get 6 ft from the east-northeast, with a period of 10 seconds. Combined energy jumps to 1235 (strong). And here's the kicker: the wind goes cross-offshore at 19 mph. That's clean. It's the only window in the entire outlook where the wind is working with us. The swell is 6 ft, so it's getting solid—maybe a bit much for beginners but fine for intermediates and up. Crowds are possible at Duds Reef. This is the best shot you've got, but remember it's a reef, so that 10-second period should give decent shape.

Friday the 18th falls apart again. Swell drops to 4 ft from the south-southwest, wind back to 16 mph cross-shore. Combined energy around 1173 (strong) but the wind is onshore or cross-shore choppy. No good.

Saturday the 19th stays marginal: 3 ft to 3 ft from the south-southwest, wind 16-19 mph cross-shore. Energy around 983 to 1031 (moderate to strong). Still chopped.

From Sunday the 20th right through to Monday the 28th, it's the same story. Swell size builds a bit—5 ft to 7 ft from the east—but the wind stays relentless cross-shore from the east-northeast at 19 to 22 mph. Combined energy ranges from 541 (moderate) up to 948 (strong) on the 24th. The period drops to 8-10 seconds, so it's short-period windswell, messy and lumpy. This setup is more interesting for kite surfing than paddle surfing, honestly. The afternoon of Thursday the 17th remains the only clean window in the whole run.

The last few days, the 27th and 28th of September, show marginal conditions with 6 ft to 6 ft from the east, period 8 seconds, and the wind finally backs off to 6-9 mph cross-shore. Combined energy around 667 to 879 (moderate to strong). Still cross-shore, but lighter—might be worth a look if you're desperate, but it's still not clean.

So, bottom line: keep your eye on Thursday the 17th afternoon. That's your one shot. The rest of the 16 days is mostly a write-off.

Rusty.

Short Range Forecast

Mostly dry. Warm (max 29°C on Tue afternoon, min 24°C on Sun night). Wind will be generally light.

Days 4-6 Weather Summary

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

Sunday
13
Monday
14
Tuesday
15
Wednesday
16
Thursday
17
Friday
18
Saturday
19
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
0
1
0
0
1
1
1
1
0
0
1
1
1
1
1
1
2
1
0
1
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
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
1.6
ENE
10
1.7
ENE
10
1.2
SSW
18
1
SSW
17
1.1
SSW
17
1.1
SSW
16
1
SSW
16
1
SSW
16
1.9
E
8
Wave Graph
Metric surfscale
Energy kJ
107
84
134
87
227
224
557
480
535
541
541
510
533
574
826
615
675
627
506
512
432
Wind (km/h)
15
E
10
ENE
10
NE
20
E
20
ENE
15
ENE
15
E
20
ENE
20
ENE
30
ENE
30
ENE
30
NE
35
ENE
30
ENE
30
ENE
25
E
30
ENE
20
ENE
25
E
25
ENE
25
ENE
Wind State
cross
cross
cross-off
cross
cross
cross
cross
cross
cross
cross
cross
cross-off
cross
cross
cross
cross
cross
cross
cross
cross
cross
High Tide
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
11:19AM0.58m
11:43PM0.23m
Low Tide
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
8:04PM0.21m
clear
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
thunderstorm
thunderstorm
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
6:36
6:35
6:34
6:32
6:31
6:30
 mm
1
1
Temp °C
27
28
26
27
28
26
27
29
27
28
28
26
27
28
26
28
28
26
28
28
26
Feels °C
27
28
27
26
27
26
28
29
28
27
27
26
25
28
26
27
25
25
27
26
26
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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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