Surf Forecasts:
Duds Reef surf forecast from 4 Aug 2026:
- Best quality surf: Tuesday 4 Aug, 2AM (local time) - 4ft (1.2m), 12s period, ENE swell with cross-offshore winds.
- Most powerful swell: Tuesday 4 Aug, 2AM (local time) - 4ft (1.2m), 12s period, ENE swell with 418 kJ wave energy.
- Next surfable swell (1★+): Monday 3 Aug, 11PM (local time) - 4ft (1.2m), 8s period with ENE 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 (Aug 03) at 11PM. The primary swell is predicted to be 1.2m and 8s period with a secondary swell of 0.6m and 12s. Another secondary swell of 0.5m and 12s 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 1.2m 12s and forecast to arrive on Tuesday (Aug 04) 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 0.8m 5s period and expected on Thursday (Aug 06) at 5AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 11PM (Mon 3rd Aug) | 4ft (1.2m) 8s |
| Best Surf | 2AM (Tue 4th Aug) | 4ft (1.2m) 12s |
| Most Powerful | 2AM (Tue 4th Aug) | 4ft (1.2m) 12s |
Table - best surf conditions forecast for Duds Reef over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s get into it.
It’s a tough stretch ahead for Duds Reef. This spot is a fairly consistent reef break, but for the first two weeks of the forecast, the wind is a total nightmare. We’re looking at a solid run of moderate to fresh cross-shore breezes and lumpy cross-chop, which is just going to ruin any chance of clean waves. The water temp is sitting at 81°F, which is about average for this time of year, so at least you won’t be freezing while you’re getting skunked.
The first real chance of anything decent doesn’t roll in until Sunday, August 16th. That morning, the wind finally swings to a light cross-offshore breeze from the NE at 15 km/h, and the swell bumps up to 6.2ft from the east. The conditions are forecast to be clean for that window. The swell period is a short 8 seconds, so it’ll be a bit jumbled, but it’s the best you’ll get for a while. The combined energy is moderate at 594. This is a definite standout for the whole outlook, but it’s a long way off, so keep your expectations in check.
Then, on Tuesday, August 18th, after a few more days of junk, we get a surprise. The morning looks glassy – wind is dead calm from the south at just 3 mph. The swell is a solid 5.6ft from the east with a 9-second period, and the combined energy is moderate at 626. The forecast says “very good surf conditions,” and with glassy conditions, this could be the cleanest session of the entire 16 days. Grab it if you can. The afternoon gets a bit bumpy again with a light cross-onshore.
So, the highlight is that Sunday morning the 16th, but the real gem is that Tuesday morning the 18th if the forecast holds. For the rest of it, honestly, it’s a waiting game.
Short Range ForecastMostly dry. Warm (max 28°C on Mon afternoon, min 25°C on Mon morning). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 27°C on Sat afternoon, min 24°C on Sat night). Winds increasing (light winds from the NE on Thu morning, fresh winds from the ENE by Sat afternoon). | ||||||||||||||||||||
Monday 3 | Tuesday 4 | Wednesday 5 | Thursday 6 | Friday 7 | Saturday 8 | Sunday 9 | |||||||||||||||
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) | ENE 8 | ENE 8 | ENE 12 | ENE 11 | E 11 | ENE 10 | ENE 10 | ENE 9 | ENE 9 | SSW 14 | SSW 14 | SSW 14 | SSW 14 | SW 20 | SSW 14 | SSW 18 | E 7 | SSW 17 | ENE 7 | E 8 | SSW 16 |
Wave Graph  | |||||||||||||||||||||
 kJ | 212 | 184 | 418 | 308 | 233 | 195 | 169 | 237 | 151 | 81 | 81 | 138 | 76 | 99 | 148 | 221 | 166 | 202 | 214 | 258 | 288 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross-off | cross-on | cross | cross-off | cross | cross | cross | cross | cross | cross-off | cross | cross | cross | cross | cross | cross | cross | cross | cross |
High Tide | 6:23PM0.51m | 8:25AM0.52m | 6:46PM0.44m | 9:44AM0.57m | 6:58PM0.36m | 11:04AM0.63m | 12:14PM0.69m | 10:37PM0.24m | 1:11PM0.75m | 00:30AM0.24m | 2:00PM0.80m | 1:39AM0.27m | |||||||||
Low Tide | 12:42PM0.28m | 1:16AM0.09m | 2:09PM0.34m | 1:51AM0.09m | 4:49PM0.35m | 2:38AM0.08m | 3:41AM0.08m | 8:48PM0.23m | 9:04PM0.19m | 6:05AM0.04m | 9:29PM0.15m | ||||||||||
 | |  |  | | | | | | | | |  | | | | | | | | | |
 | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — |
 | — | 7:09 | — | — | 7:08 | — | — | 7:07 | — | — | 7:07 | — | — | 7:07 | — | — | 7:07 | — | — | 7:06 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 27 | 28 | 26 | 27 | 27 | 26 | 27 | 28 | 25 | 26 | 26 | 25 | 26 | 26 | 25 | 26 | 27 | 25 | 26 | 26 | 25 |
Feels °C | 26 | 26 | 27 | 28 | 28 | 28 | 27 | 28 | 26 | 26 | 26 | 25 | 24 | 24 | 25 | 23 | 24 | 23 | 25 | 24 | 24 |
Swell 1 Height (m) Direction Period (s) | E 13 | E 12 | ENE 12 | ENE 11 | E 11 | ENE 10 | ENE 10 | ENE 9 | ENE 9 | ENE 8 | SSW 14 | SSW 14 | SSW 14 | SW 14 | SSW 14 | SSW 14 | SSW 13 | SSW 13 | SSW 13 | SSW 12 | SSW 16 |
| kJ | 84 | 108 | 418 | 308 | 233 | 195 | 169 | 110 | 103 | 26 | 81 | 138 | 76 | 91 | 127 | 175 | 120 | 99 | 96 | 85 | 288 |
Swell 2 Height (m) Direction Period (s) | SSW 13 | SSW 12 | SSW 12 | SSW 12 | SSW 11 | SSW 11 | SSW 11 | SW 15 | SW 15 | SSW 14 | ENE 8 | NE 8 | NE 7 | SW 20 | SSW 19 | SSW 18 | SW 18 | SSW 17 | SW 16 | S 18 | SSW 12 |
| kJ | 55 | 50 | 82 | 79 | 74 | 69 | 38 | 110 | 107 | 81 | 26 | 14 | 14 | 99 | 148 | 221 | 154 | 202 | 130 | 156 | 56 |
Swell 3 Height (m) Direction Period (s) | SW 13 | SW 13 | SW 17 | W 13 | SSW 16 | SSW 15 | SSW 16 | SSW 11 | S 12 | SSE 11 | SSE 11 | S 11 | SSE 11 | NE 7 | S 11 | SE 8 | SSE 10 | SSE 10 | W 12 | SW 16 | SSE 10 |
| kJ | 42 | 41 | 76 | 30 | 107 | 87 | 94 | 37 | 46 | 43 | 42 | 21 | 38 | 13 | 20 | 16 | 32 | 32 | 44 | 127 | 38 |
Wind waves Height (m) Direction Period (s) | ENE 8 | ENE 8 | ENE 8 | — | SE 5 | — | — | ENE 9 | ENE 9 | E 6 | E 5 | E 6 | E 5 | ENE 5 | E 6 | E 7 | E 7 | E 7 | ENE 7 | E 8 | E 8 |
| kJ | 212 | 184 | 177 | — | 5 | — | — | 237 | 151 | 32 | 29 | 22 | 20 | 36 | 143 | 157 | 166 | 176 | 214 | 258 | 196 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 15 | 21 | 0 | 12 | 6 | 0 | 12 | 6 | 12 | 10 | 12 | 10 | 12 | 12 | 12 | 14 | 21 | 13 | 13 | 21 | 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.
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