
Surf Forecasts:
Duds Reef surf forecast from 5 Sep 2026:
- Best quality surf: Saturday 12 Sep, 5AM (local time) - 3.5ft (1.0m), 11s period, E swell with cross-offshore winds.
- Most powerful swell: Tuesday 8 Sep, 2AM (local time) - 13ft (4.0m), 14s period, SW swell with 6,231 kJ wave energy.
- Next surfable swell (1★+): Saturday 12 Sep, 5AM (local time) - 3.5ft (1.0m), 11s period with E 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 Saturday (Sep 12) at 5AM. The primary swell is predicted to be 1.0m and 11s period with a secondary swell of 0.7m and 15s. 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 14s and forecast to arrive on Tuesday (Sep 08) at 2AM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.0m 11s period and expected on Tuesday (Sep 08) at 2PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5AM (Sat 12th Sep) | 3.5ft (1.0m) 11s |
| Best Surf | 5AM (Sat 12th Sep) | 3.5ft (1.0m) 11s |
| Most Powerful | 2AM (Tue 8th Sep) | 13ft (4.0m) 14s |
Table - best surf conditions forecast for Duds Reef over the next 16 days.
The Lowdown
Oi, Rusty here. Let’s have a look at what’s on the cards for Duds Reef over the next couple of weeks.
Truth be told, it’s a pretty bleak stretch for most of the run. The good news is, there’s a little window right at the end that might just make it worthwhile. The overall pattern is a lot of messy, onshore slop, with a few days of clean, glassy conditions popping up late in the game.
We kick off the first recommendation on Saturday, the 5th of September. The morning sees a 6ft swell pushing in from the east, with a 14-second period. That’s a long-period groundswell, which is a good sign for shape, but the wind is a cross-shore at 15 mph, so it’s got a bit of a chop on it. The combined wave energy is around 2055 (moderate), but the water is sitting at 81°F, which is about average for this time of year. It’s a marginal call, and the afternoon doesn’t look much better with the same size swell dropping a touch in period to 13 seconds and the chop still there.
Sunday, the 6th, is more of the same. A 5ft east swell with a 12-second period, but the wind is picking up to 19 mph in the morning making it lumpy, and there’s a risk of thunderstorms in the afternoon. The energy drops a bit.
From Monday the 7th all the way through to Saturday the 19th of September, the surf is basically a write-off. The wind is consistently onshore or cross-onshore, with a lot of stormy, poor conditions. Swell sizes jump up, with an 12ft onshore mess on Tuesday the 8th and an 8ft cross-onshore mess on the Monday afternoon, but it’s all just choppy, ugly stuff. The combined energy gets up to 4974 (strong) on the Tuesday morning, but with the wind howling from the south, it’s a kite-surfing setup, not a paddling one. There’s a long, 16-day stretch with no real quality, so expect a big blank run.
But hold on. The standout session comes on Sunday, the 20th of September. The afternoon is absolute gold. The wind drops to a glassy 3 mph, and the forecast says “expect very good surf conditions.” The swell is a clean 3ft from the south-southwest, with a 14-second period. That’s a proper groundswell with a bit of energy (539, moderate). For a reef break like Duds Reef, that long-period, organised swell from the SSW is exactly what it needs. The conditions will be clean, smooth, and the waves will be holding their shape. This is the one to circle on the calendar. It’s a little over a week away, so it’s a promising long-range call, but it looks like the real deal.
If you’re an intermediate, that 3ft glassy session on the 20th is your window. The crowds can be around sometimes at Duds Reef, so you might have a few mates out, but with conditions that good, it’s worth it.
Rusty.
Short Range ForecastHeavy rain (total 20mm), heaviest during Sun night. Warm (max 28°C on Sat afternoon, min 25°C on Sat morning). Mainly fresh winds. | Days 4-6 Weather SummaryModerate rain (total 13mm), heaviest on Wed afternoon. Warm (max 27°C on Tue morning, min 25°C on Thu night). Winds decreasing (fresh winds from the SSE on Tue morning, light winds from the SE by Tue night). | ||||||||||||||||||||
Saturday 5 | Sunday 6 | Monday 7 | Tuesday 8 | Wednesday 9 | Thursday 10 | Friday 11 | |||||||||||||||
AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Swell Height Map | |||||||||||||||||||||
Wave Height (m) Direction Period (s) | E 14 | ENE 13 | E 13 | E 12 | E 12 | SSW 14 | E 13 | SW 14 | SW 14 | SW 12 | SSW 9 | SSW 14 | SSW 14 | SSW 13 | SSW 13 | SSW 13 | ENE 7 | ENE 13 | E 12 | E 12 | ENE 11 |
Wave Graph | |||||||||||||||||||||
1190 | 1179 | 986 | 771 | 734 | 1126 | 1087 | 2492 | 6231 | 3028 | 592 | 356 | 336 | 257 | 176 | 208 | 167 | 507 | 432 | 341 | 263 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross | cross | cross | cross | cross-on | cross-on | on | on | on | on | on | cross-on | cross | cross | cross | cross | cross-on | cross-on | cross |
High Tide | 11:53AM0.69m | 11:42PM0.23m | 12:50PM0.73m | 00:58AM0.28m | 1:37PM0.75m | 1:49AM0.35m | 2:17PM0.75m | 2:33AM0.42m | 2:52PM0.72m | 3:14AM0.49m | 3:25PM0.68m | 3:53AM0.55m | 3:54PM0.62m | 4:32AM0.59m | |||||||
Low Tide | 8:07PM0.19m | 8:24PM0.16m | 6:09AM0.09m | 8:46PM0.13m | 7:12AM0.08m | 9:09PM0.11m | 8:06AM0.08m | 9:31PM0.09m | 8:56AM0.09m | 9:53PM0.08m | 9:45AM0.12m | 10:14PM0.07m | |||||||||
6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | |
— | 6:44 | — | — | 6:43 | — | — | 6:42 | — | — | 6:40 | — | — | 6:39 | — | — | 6:39 | — | — | 6:38 | — | |
mm | — | — | — | — | 4 | 12 | — | 2 | 2 | 2 | 2 | 4 | 1 | 3 | 1 | — | — | — | — | — | — |
Temp °C | 27 | 28 | 26 | 27 | 28 | 26 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 26 | 26 | 27 | 26 | 26 | 27 | 26 |
Feels °C | 27 | 27 | 26 | 26 | 28 | 27 | 27 | 27 | 27 | 26 | 28 | 29 | 30 | 29 | 27 | 27 | 27 | 26 | 26 | 27 | 26 |
Swell 1 Height (m) Direction Period (s) | S 12 | S 12 | E 13 | E 12 | E 12 | E 12 | E 13 | SW 14 | SW 14 | SW 12 | SSW 9 | SSW 8 | SSW 8 | SSW 13 | ENE 8 | E 7 | E 7 | SW 16 | E 12 | E 12 | ENE 11 |
746 | 722 | 986 | 771 | 734 | 841 | 1087 | 2492 | 6231 | 3028 | 592 | 264 | 131 | 257 | 77 | 109 | 106 | 268 | 432 | 341 | 263 | |
Swell 2 Height (m) Direction Period (s) | SSW 17 | SSW 17 | SSW 12 | SSW 12 | SSW 12 | SSW 14 | SW 12 | E 12 | ENE 12 | ENE 11 | W 11 | SSW 14 | SSW 14 | SSW 8 | SSW 13 | SSW 13 | SSW 12 | SSW 12 | SW 16 | SW 15 | SW 15 |
119 | 119 | 550 | 539 | 521 | 1126 | 587 | 884 | 680 | 603 | 639 | 356 | 336 | 81 | 176 | 189 | 121 | 81 | 258 | 229 | 226 | |
Swell 3 Height (m) Direction Period (s) | NNE 10 | N 10 | SSW 16 | SSW 16 | SW 15 | SSW 18 | SW 15 | SSW 17 | SSW 15 | SSW 15 | ENE 11 | W 9 | ENE 9 | ENE 8 | SSW 7 | SSW 16 | E 12 | SW 9 | SSW 12 | SSW 12 | SSW 11 |
20 | 2 | 223 | 318 | 229 | 352 | 788 | 745 | 581 | 588 | 373 | 158 | 111 | 90 | 43 | 181 | 104 | 21 | 45 | 44 | 42 | |
Wind waves Height (m) Direction Period (s) | E 14 | ENE 13 | — | — | — | — | ESE 6 | SSE 8 | SSE 7 | S 10 | — | — | — | — | ENE 8 | ENE 7 | ENE 7 | ENE 13 | ENE 8 | ENE 12 | — |
1190 | 1179 | — | — | — | — | 4 | 300 | 444 | 755 | — | — | — | — | 91 | 208 | 167 | 507 | 91 | 322 | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 12 | 12 | 12 | 12 | 12 | 12 | 145 | 31 | 97 | 44 | 97 | 27 | 29 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 |
Best forecast wave conditions in Oahu | |||||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)
Wind Speed (km/h)
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.










