Surf Forecasts:
Duds Reef surf forecast from 24 Aug 2026:
- Most powerful swell: Thursday 27 Aug, 11AM (local time) - 4ft (1.2m), 17s period, S swell with 851 kJ wave energy.
Best Forecast Surf Conditions for Duds Reef this week:
The most powerful waves expected at Duds Reef in the next 16 days are 1.2m 17s and forecast to arrive on Thursday (Aug 27) at 11AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.2m 9s period and expected on Thursday (Aug 27) at 11AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 11AM (Thu 27th Aug) | 4ft (1.2m) 17s |
Table - best surf conditions forecast for Duds Reef over the next 16 days.
The Lowdown
Alright, let's shift gears to feet and miles. This is Rusty.
Honestly, this is a tough 16-day run. The only spot in the game is Duds Reef, and the wind is your enemy here. From Monday the 24th through to Monday the 7th of September, it’s a constant cross-shore breeze, mostly a fresh 22 to 25 mph, bringing lumpy, choppy conditions. Not clean, not fun.
The first week, from Monday 24th to Sunday 30th August, is all poor. Swell heights bounce from 2 ft to 6 ft, with some longer periods (14 to 17 seconds) popping in. You’ve got moderate to strong wave energy (the combined energy numbers go from 426 to 967), but the cross-chop is relentless. The water temp is about average for this time of year.
Early September brings a slight shift. On Tuesday the 1st afternoon, the swell hits 6 ft from the ENE with a 9-second period and energy of 1270. It’s still cross-shore, but now it’s described as “marginal.” That repeats Wednesday 2nd morning (6 ft, 8 seconds, 1015 energy). Chunky but messy – for experienced folks only.
There’s a poor stretch from Thursday through Saturday morning. Then on Saturday the 5th September afternoon, a real standout: 6 ft from the E, 13-second period, and 1379 energy. That’s a long-period groundswell, powerful, but it can break straight on a reef, so be ready. Wind is still cross-shore, but a lighter 15 mph. Not for beginners.
Sunday the 6th September morning is marginal again – 5 ft, 12 seconds, 1086 energy – but the wind is back up to 18 mph cross-shore. Then Monday the 7th September morning is the cleanest window: wind drops to a light 6 mph from the ESE, cross-on. Swell is 4 ft from the ENE with an 11-second period, energy of 707. This is your best bet for anything approaching clean lines.
The best on offer: Saturday the 5th afternoon (big groundswell, but still cross-shore) and Monday the 7th morning (lighter wind, cleaner, smaller). The Monday 7th is the one for intermediates. Crowds are possible, as it’s the nicest window. Water temp is average. Stay tuned, the forecasts might change.
Rusty.
Short Range ForecastMostly dry. Warm (max 28°C on Mon afternoon, min 24°C on Tue night). Mainly fresh winds. | Days 5-7 Weather SummaryMostly dry. Warm (max 28°C on Fri afternoon, min 24°C on Wed night). Mainly fresh winds. | ||||||||||||||||||
Monday 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | Friday 28 | Saturday 29 | ||||||||||||||
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 7 | SSW 14 | E 7 | E 8 | E 7 | E 7 | E 7 | SSW 14 | S 18 | S 19 | S 17 | S 16 | S 16 | S 14 | S 14 | S 13 | E 7 | E 7 | SSW 17 |
Wave Graph  | |||||||||||||||||||
 kJ | 295 | 166 | 178 | 177 | 278 | 272 | 254 | 236 | 395 | 458 | 851 | 527 | 582 | 329 | 399 | 225 | 184 | 247 | 186 |
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 | cross | cross | cross | cross |
High Tide | 1:26AM0.28m | 2:15PM0.70m | 2:05AM0.31m | 2:45PM0.72m | 2:41AM0.35m | 3:13PM0.72m | 3:16AM0.40m | 3:40PM0.70m | 3:53AM0.45m | 4:05PM0.67m | 4:31AM0.50m | 4:31PM0.62m | |||||||
Low Tide | 9:11PM0.18m | 6:44AM0.10m | 9:26PM0.16m | 7:29AM0.08m | 9:43PM0.15m | 8:10AM0.07m | 10:00PM0.13m | 8:51AM0.08m | 10:18PM0.11m | 9:32AM0.10m | 10:37PM0.10m | 10:15AM0.14m | 10:58PM0.09m | ||||||
 |  |  |  | | | | | | | | | | | | | | | | |
 | — | 6:13 | — | — | 6:13 | — | — | 6:13 | — | — | 6:13 | — | — | 6:13 | — | — | 6:13 | — | — |
 | 6:55 | — | 6:54 | — | — | 6:53 | — | — | 6:52 | — | — | 6:52 | — | — | 6:51 | — | — | 6:51 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 26 | 27 | 28 | 26 | 27 | 27 | 26 | 26 | 27 | 25 | 27 | 27 | 25 | 27 | 28 | 25 | 26 | 27 | 25 |
Feels °C | 25 | 25 | 26 | 27 | 24 | 24 | 25 | 22 | 24 | 23 | 25 | 24 | 23 | 24 | 26 | 23 | 23 | 24 | 22 |
Swell 1 Height (m) Direction Period (s) | SSW 14 | SSW 14 | SSW 13 | SSW 13 | SSW 12 | SSW 16 | SSW 15 | SSW 14 | S 18 | S 19 | S 17 | S 16 | S 16 | S 14 | S 14 | S 13 | S 13 | E 13 | S 12 |
| kJ | 186 | 166 | 156 | 140 | 119 | 196 | 167 | 236 | 395 | 458 | 851 | 527 | 582 | 329 | 399 | 225 | 121 | 92 | 138 |
Swell 2 Height (m) Direction Period (s) | SSE 13 | E 8 | SSE 8 | SSE 7 | SSW 16 | SSW 12 | SSW 12 | S 18 | SSW 13 | SSW 13 | WNW 9 | SSW 12 | WNW 9 | SSW 11 | E 14 | SW 19 | S 13 | S 12 | SSW 17 |
| kJ | 95 | 50 | 47 | 29 | 146 | 81 | 81 | 235 | 135 | 135 | 8 | 81 | 8 | 38 | 32 | 90 | 89 | 76 | 186 |
Swell 3 Height (m) Direction Period (s) | NW 12 | S 12 | SSE 12 | SSE 12 | SSE 13 | SSE 6 | S 18 | SSE 12 | SE 8 | SSW 16 | W 9 | WNW 9 | W 10 | E 14 | SSW 19 | E 12 | E 14 | S 13 | E 13 |
| kJ | 34 | 76 | 47 | 46 | 54 | 13 | 167 | 46 | 17 | 50 | 7 | 8 | 9 | 16 | 35 | 26 | 59 | 89 | 125 |
Wind waves Height (m) Direction Period (s) | E 7 | E 7 | E 7 | E 8 | E 7 | E 7 | E 7 | E 7 | E 7 | E 7 | E 6 | E 6 | E 6 | E 7 | E 6 | E 7 | E 7 | E 7 | E 7 |
| kJ | 295 | 134 | 178 | 177 | 278 | 272 | 254 | 179 | 130 | 131 | 116 | 151 | 115 | 103 | 167 | 188 | 184 | 247 | 166 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 13 | 21 | 12 | 12 | 21 | 21 | 12 | 21 | 24 | 12 | 12 | 13 | 12 | 21 | 27 | 13 | 21 | 24 | 12 |
Best forecast wave conditions in Oahu | |||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||
Header Global | |||||||||||||||||||
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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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