Surf Forecasts:
Duds Reef surf forecast from 31 Jul 2026:
- Best quality surf: Tuesday 4 Aug, 5AM (local time) - 4ft (1.2m), 12s period, ENE swell with cross-offshore winds.
- Most powerful swell: Saturday 1 Aug, 11AM (local time) - 10ft (3.0m), 8s period, E swell with 1,039 kJ wave energy.
- Next surfable swell (1★+): Tuesday 4 Aug, 5AM (local time) - 4ft (1.2m), 12s 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 Tuesday (Aug 04) at 5AM. The primary swell is predicted to be 1.2m and 12s period with a secondary swell of 0.4m and 12s. 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 3.0m 8s and forecast to arrive on Saturday (Aug 01) 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 (Tue 4th Aug) | 4ft (1.2m) 12s |
| Best Surf | 5AM (Tue 4th Aug) | 4ft (1.2m) 12s |
| Most Powerful | 11AM (Sat 1st Aug) | 10ft (3.0m) 8s |
Table - best surf conditions forecast for Duds Reef over the next 16 days.
The Lowdown
Alright, this is Rusty. Let's talk about what's on the table for the next couple of weeks.
Honestly, I'm looking at this forecast with a heavy heart. It's a long stretch of poor conditions with strong cross-shore winds and messy chop. The first real glimmer of something decent doesn't show up until the afternoon of Tuesday, August 4th. We’re looking at a solid week of waiting it out.
The best chance for a wave around here is at Duds Reef. This is an exposed reef break that's fairly consistent, but it's usually got a few people on it. The water temp is about average for this time of year, so nothing wild there.
The only standout worth paddling for is the afternoon of Tuesday, August 4th. We've got a groundswell rolling in from the ENE at 4 ft, with a period of 11 seconds. The combined energy is moderate (356). The wind goes super light, swinging cross-offshore, and the forecast says it should be clean. That's the window. It's small, but it'll be the best shape we see all week.
After that, we're back into the grind until the afternoon of Friday, August 14th. That's a long gap of over a week with nothing really worth your time. On that Friday, we get a south swell at 2 ft with a very long 19-second period. The combined energy is moderate (668). The wind will be light and cross-offshore, promising clean conditions. It's a long-period groundswell which will work best at this reef, but it's a long way out, so keep your hopes in check.
So, get the board waxed for Tuesday the 4th and Friday the 14th. Everything else is a kite surfer's game.
- Rusty
Short Range ForecastMostly dry. Warm (max 27°C on Fri morning, min 25°C on Thu night). Winds increasing (light winds from the ENE on Thu night, strong winds from the ENE by Fri night). | Days 5-7 Weather SummaryMostly dry. Warm (max 28°C on Wed afternoon, min 24°C on Sun night). Winds decreasing (fresh winds from the ENE on Sun night, light winds from the NNE by Tue afternoon). | ||||||||||||||||||
Friday 31 | Saturday 1 | Sunday 2 | Monday 3 | Tuesday 4 | Wednesday 5 | ||||||||||||||
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) | SW 16 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | ENE 8 | E 8 | E 8 | ENE 8 | ENE 12 | ENE 11 | ENE 11 | ENE 10 | ENE 9 | ENE 9 | SW 15 |
Wave Graph  | |||||||||||||||||||
 kJ | 268 | 261 | 332 | 825 | 1039 | 659 | 659 | 552 | 509 | 358 | 239 | 217 | 503 | 363 | 297 | 209 | 280 | 135 | 107 |
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 | cross | cross | cross-off | cross-off | cross | cross | cross |
High Tide | 4:49AM0.37m | 5:10PM0.70m | 5:33AM0.41m | 5:35PM0.65m | 6:22AM0.44m | 5:59PM0.58m | 7:18AM0.48m | 6:23PM0.51m | 8:25AM0.52m | 6:46PM0.44m | 9:44AM0.57m | 6:58PM0.36m | |||||||
Low Tide | 11:39PM0.13m | 10:13AM0.10m | 00:01AM0.12m | 10:55AM0.16m | 00:23AM0.11m | 11:42AM0.22m | 00:48AM0.10m | 12:42PM0.28m | 1:16AM0.09m | 2:09PM0.34m | 1:51AM0.09m | 4:49PM0.35m | 2:38AM0.08m | ||||||
 |  |  |  | | | | | | | | | | | |  | | | | |
 | — | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — |
 | 7:12 | — | 7:10 | — | — | 7:10 | — | — | 7:09 | — | — | 7:09 | — | — | 7:08 | — | — | 7:07 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 26 | 27 | 27 | 25 | 26 | 27 | 25 | 26 | 27 | 25 | 26 | 27 | 25 | 27 | 27 | 26 | 27 | 28 | 26 |
Feels °C | 28 | 24 | 23 | 22 | 22 | 22 | 23 | 22 | 23 | 23 | 25 | 26 | 24 | 28 | 29 | 28 | 27 | 27 | 27 |
Swell 1 Height (m) Direction Period (s) | E 7 | S 12 | SW 15 | SW 15 | SW 14 | E 14 | E 14 | E 14 | E 14 | E 13 | E 12 | E 13 | ENE 12 | ENE 11 | ENE 11 | ENE 10 | ENE 9 | ENE 9 | S 12 |
| kJ | 156 | 151 | 236 | 220 | 194 | 194 | 144 | 138 | 142 | 87 | 80 | 84 | 503 | 363 | 297 | 209 | 149 | 135 | 75 |
Swell 2 Height (m) Direction Period (s) | S 13 | SW 16 | E 16 | E 15 | SSW 12 | SW 14 | SSW 14 | SSW 14 | SSW 13 | SSW 13 | SW 13 | SSW 12 | SSW 12 | SSW 12 | SSW 11 | SSW 15 | SSW 11 | SSW 15 | SW 15 |
| kJ | 212 | 261 | 231 | 205 | 45 | 149 | 131 | 133 | 116 | 57 | 42 | 50 | 56 | 46 | 42 | 87 | 46 | 88 | 107 |
Swell 3 Height (m) Direction Period (s) | SW 16 | E 15 | S 12 | S 12 | S 16 | S 11 | S 11 | S 11 | W 12 | SW 13 | SSW 13 | SW 13 | SE 9 | SE 8 | SSE 6 | SSW 11 | SSW 16 | SSW 11 | ENE 8 |
| kJ | 268 | 159 | 106 | 71 | 19 | 39 | 22 | 9 | 11 | 42 | 55 | 41 | 21 | 18 | 17 | 40 | 94 | 39 | 27 |
Wind waves Height (m) Direction Period (s) | — | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | ENE 8 | E 8 | E 8 | ENE 8 | ENE 8 | — | — | — | ENE 9 | — | E 6 |
| kJ | — | 253 | 332 | 825 | 1039 | 659 | 659 | 552 | 509 | 358 | 239 | 217 | 207 | — | — | — | 280 | — | 43 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 12 | 24 | 145 | 24 | 173 | 146 | 146 | 27 | 173 | 12 | 15 | 16 | 15 | 12 | 0 | 0 | 16 | 12 | 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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