Surf Forecasts:
Duds Reef surf forecast from 29 Aug 2026:
- Best quality surf: Wednesday 2 Sep, 5AM (local time) - 3ft (0.9m), 16s period, S swell with cross-offshore winds.
- Most powerful swell: Wednesday 2 Sep, 11AM (local time) - 3.5ft (1.0m), 16s period, S swell with 526 kJ wave energy.
- Next surfable swell (1★+): Wednesday 2 Sep, 5AM (local time) - 3ft (0.9m), 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 Wednesday (Sep 02) at 5AM. The primary swell is predicted to be 0.9m and 16s period with a secondary swell of 1.3m and 8s. Another secondary swell of 1.5m and 8s 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 1.0m 16s and forecast to arrive on Wednesday (Sep 02) at 11AM. Winds are predicted to be cross-shore at the time the swell arrives.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5AM (Wed 2nd Sep) | 3ft (0.9m) 16s |
| Best Surf | 5AM (Wed 2nd Sep) | 3ft (0.9m) 16s |
| Most Powerful | 11AM (Wed 2nd Sep) | 3.5ft (1.0m) 16s |
Table - best surf conditions forecast for Duds Reef over the next 16 days.
The Lowdown
Alright, Rusty here. Let's break down Duds Reef.
The water is 81°F, which is right where it should be for this time of year, nothing unusual.
Honestly, it's a tough run for the next couple of weeks. From Saturday, August 29th, all the way through to Saturday, September 12th, the conditions are just not friendly. The wind is hammering out of the ENE at 18 to 25 mph, blowing cross-shore most days, churning the ocean into a lumpy, cross-chop mess. The combined swell energy sits in the moderate range, mostly in the 400s to 800s, but it's all wind-affected junk. Swell sizes pop up a bit, like 5 ft on August 31st and 6 ft on September 5th, but with that nasty cross-breeze, it's just messy. The swell period is short, around 7 to 8 seconds, so it's weak, close-interval chop that won't hold shape. Even when a 5 ft and 6 ft swell (combined energy 726 and 762) shows up on September 1st and 2nd, the wind is still on it, ruining any chance of a clean wave.
The best you'll see in this whole stretch is late on Tuesday, September 8th. We get a break: the wind goes cross-offshore, and the wave comment says "clean." The swell is 7 ft from the ENE with a period of 11 seconds, and the combined energy jumps up to 1805. That's a proper groundswell, and the clean conditions mean it could actually be rideable. But at 7 ft, this is getting into expert territory. It's a reef break, so it can handle a longer period, but the wind is still a fresh breeze, so it's not going to be perfect glass. After that, September 9th drops back to cross-shore wind and a lumpy mess with 6 ft to 7 ft of swell, and then September 10th brings 10 ft of ENE swell with a combined energy over 2000. That's serious power, but the period is only 8 seconds and the wind is cross-shore, so it's going to be a washing machine. Only for the hardcore.
By Sunday, September 13th, we finally see a light wind morning with the wind switching to onshore, then a glassy afternoon with the wind going to 3 mph from the SSW. The swell drops to 3 ft from the east with a 7-second period, and the combined energy is only 155. The comment says "glassy" and "surfable waves but very ordinary conditions." It's small and weak, but at least you won't be fighting the wind. That's the only window of true calm.
So, the standout is the afternoon of Tuesday, September 8th. That's the one session with clean conditions and a proper 7 ft groundswell. Everything else is a battle. For the rest of the run, you're better off with a kite than a paddle. Duds Reef can get crowds "sometimes," but with conditions this poor, it's likely to be empty.
Rusty, out.
Short Range ForecastMostly dry. Warm (max 27°C on Sat afternoon, min 25°C on Sat morning). Mainly fresh winds. | Days 4-6 Weather SummaryMostly dry. Warm (max 28°C on Wed morning, min 24°C on Thu night). Mainly fresh winds. | ||||||||||||||||||||
Saturday 29 | Sunday 30 | Monday 31 | Tuesday 1 | Wednesday 2 | Thursday 3 | Friday 4 | |||||||||||||||
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 6 | S 13 | E 7 | SSW 16 | SSW 16 | SSW 15 | ENE 7 | SSW 14 | ENE 8 | SSW 18 | ENE 8 | S 17 | S 16 | S 16 | S 15 | S 14 | S 14 | S 13 | S 13 | E 13 | E 7 |
Wave Graph | |||||||||||||||||||||
156 | 215 | 270 | 226 | 176 | 199 | 210 | 183 | 238 | 329 | 322 | 368 | 526 | 406 | 347 | 268 | 250 | 225 | 222 | 214 | 203 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross-off | cross | cross | cross | cross | cross | cross | cross | cross | cross-off |
High Tide | 4:31PM0.62m | 5:12AM0.55m | 4:56PM0.56m | 5:56AM0.58m | 5:20PM0.49m | 6:48AM0.60m | 5:42PM0.41m | 7:51AM0.61m | 5:57PM0.35m | 9:11AM0.63m | 10:39AM0.65m | ||||||||||
Low Tide | 10:15AM0.14m | 10:58PM0.09m | 11:02AM0.18m | 11:20PM0.08m | 11:55AM0.24m | 11:45PM0.07m | 1:04PM0.29m | 00:15AM0.07m | 2:51PM0.32m | 00:53AM0.08m | 1:48AM0.10m | 3:13AM0.11m | |||||||||
6:13 | — | — | 6:13 | — | — | 6:15 | — | — | 6:15 | — | — | 6:15 | — | — | 6:15 | — | — | 6:16 | — | — | |
— | 6:51 | — | — | 6:50 | — | — | 6:49 | — | — | 6:47 | — | — | 6:46 | — | — | 6:45 | — | — | 6:45 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 26 | 27 | 25 | 27 | 27 | 25 | 27 | 27 | 25 | 27 | 27 | 26 | 28 | 28 | 26 | 27 | 27 | 25 | 27 | 27 | 25 |
Feels °C | 23 | 24 | 22 | 24 | 24 | 23 | 25 | 24 | 23 | 25 | 25 | 25 | 27 | 26 | 26 | 25 | 25 | 23 | 24 | 24 | 23 |
Swell 1 Height (m) Direction Period (s) | S 13 | S 13 | S 12 | SSW 16 | S 12 | SSW 15 | SSW 15 | SSW 14 | S 19 | SSW 18 | S 18 | S 17 | S 16 | S 16 | S 15 | S 14 | S 14 | S 13 | S 13 | E 13 | S 13 |
121 | 215 | 141 | 226 | 100 | 199 | 191 | 183 | 192 | 329 | 314 | 368 | 526 | 406 | 347 | 268 | 250 | 225 | 222 | 212 | 162 | |
Swell 2 Height (m) Direction Period (s) | E 13 | E 13 | SSW 17 | SSW 12 | SSW 16 | S 11 | S 11 | S 11 | S 10 | SW 14 | S 12 | SSE 10 | SSE 10 | S 11 | S 11 | E 13 | E 13 | E 12 | E 13 | S 13 | E 13 |
89 | 81 | 186 | 46 | 162 | 85 | 82 | 82 | 50 | 100 | 75 | 35 | 32 | 65 | 61 | 123 | 117 | 103 | 162 | 165 | 160 | |
Swell 3 Height (m) Direction Period (s) | S 13 | SSW 17 | E 12 | ENE 11 | ENE 11 | E 11 | S 21 | ENE 9 | SW 14 | S 10 | SW 14 | SW 14 | SW 14 | E 12 | E 14 | SSE 10 | SSE 10 | S 9 | SW 12 | SW 13 | SSW 20 |
89 | 113 | 75 | 43 | 40 | 35 | 76 | 29 | 74 | 46 | 51 | 50 | 48 | 48 | 97 | 33 | 33 | 6 | 6 | 27 | 37 | |
Wind waves Height (m) Direction Period (s) | E 6 | E 7 | E 7 | E 7 | ENE 7 | E 7 | ENE 7 | ENE 7 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | E 8 | ENE 8 | ENE 8 | E 8 | E 8 | ENE 7 | E 7 |
156 | 130 | 270 | 192 | 176 | 161 | 210 | 167 | 238 | 251 | 322 | 273 | 206 | 163 | 191 | 202 | 207 | 177 | 177 | 214 | 203 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 21 | 24 | 24 | 21 | 24 | 12 | 15 | 21 | 12 | 12 | 144 | 12 | 12 | 13 | 12 | 12 | 144 | 12 | 15 | 146 | 12 |
Best forecast wave conditions in Oahu | |||||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||||
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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.











