
Surf Forecasts:
Duds Reef surf forecast from 23 Jul 2026:
- Best quality surf: Wednesday 29 Jul, 2AM (local time) - 5.5ft (1.7m), 13s period, E swell with cross-offshore winds.
- Most powerful swell: Tuesday 28 Jul, 11PM (local time) - 7ft (2.2m), 13s period, ENE swell with 1,673 kJ wave energy.
- Next surfable swell (1★+): Wednesday 29 Jul, 2AM (local time) - 5.5ft (1.7m), 13s 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 Wednesday (Jul 29) at 2AM. The primary swell is predicted to be 1.7m and 13s period with a secondary swell of 0.7m and 14s. Another secondary swell of 1.7m and 13s 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 2.2m 13s and forecast to arrive on Tuesday (Jul 28) at 11PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.0m 7s period and expected on Wednesday (Jul 29) at 8AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2AM (Wed 29th Jul) | 5.5ft (1.7m) 13s |
| Best Surf | 2AM (Wed 29th Jul) | 5.5ft (1.7m) 13s |
| Most Powerful | 11PM (Tue 28th Jul) | 7ft (2.2m) 13s |
Table - best surf conditions forecast for Duds Reef over the next 16 days.
The Lowdown
Alright, Rusty here. Let’s have a look at what we’ve got.
Honestly, it’s a tough stretch on the cards for Duds Reef. We’re looking at a long, frustrating run of poor to marginal surf that stretches for a couple of weeks. The wind is almost constantly a cross-shore, mostly from the ENE, and it’s often blowing hard enough to chop things up, making it hard to get excited.
The first day that’s even worth mentioning isn’t until the 24th of July, and even then it’s just barely scraping into the marginal zone. On Friday morning the 24th, there’s a 7ft swell, but it’s coming from the east with a short period of only 7 seconds – that’s windswell, not groundswell. The wind is a fresh cross-shore, so the whole setup looks more interesting for kite surfing than paddle surfing. The combined energy is moderate (1013), but the quality just isn’t there for a decent surf.
We get a similar story day after day through until the end of July. Swell sizes hover around 3ft to 4ft, but the persistent ENE wind, often a fresh or moderate breeze, keeps that cross-chop messy. The best call in that first week might be the afternoon of the 29th of July. The swell drops to a modest 5ft from the ENE, and the wind actually swings to a cross-offshore from the NE for the first time at 12 mph. That’s the cleanest the forecast gets, but it’s still a very marginal call.
Water temperature is sitting at 80°F on the 22nd, which is only 0.5°F above normal for the time of year, so nothing out of the ordinary for a warm dip.
Looking further out to August, the first week there is more of the same: small windswell, lumpy conditions, and nothing to get the heart racing. The only day that catches the eye is the 5th of August. Wednesday morning sees a 5ft swell from the east, but more importantly, by Wednesday afternoon the swell bumps up to 6ft from the ENE with a period of 13 seconds. The combined energy jumps to a strong 1442, suggesting there’s genuine power in the water. But that fresh cross-shore wind is still there, so while the size is there for strong intermediate to expert surfers, the wind will keep it bumpy and raw.
So, if you’re looking for the pick of a pretty average period, I’d say the afternoon of the 5th of August has the most size and energy, but don’t expect perfection. The cross-offshore moment on the 29th of July might offer the cleanest wave, but it’s small. Otherwise, this is a long gap of frustrating conditions. It’s a quiet run, but forecasts can change, and a place like Duds Reef can turn on quickly.
Rusty.
Short Range ForecastMostly dry. Warm (max 27°C on Fri afternoon, min 24°C on Wed night). Mainly fresh winds. | Days 5-7 Weather SummaryMostly dry. Warm (max 27°C on Sat afternoon, min 24°C on Sat night). Mainly fresh winds. | |||||||||||||||||||
Wed 22 | Thursday 23 | Friday 24 | Saturday 25 | Sunday 26 | Monday 27 | Tuesday 28 | ||||||||||||||
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) | SSW 23 | SSW 22 | SSW 20 | SSW 20 | SSW 18 | E 7 | SSW 17 | SSW 16 | SSW 19 | SSW 18 | SSW 18 | SSW 16 | SSW 16 | E 14 | E 14 | E 13 | ENE 13 | E 13 | ENE 13 | E 13 |
Wave Graph | ||||||||||||||||||||
426 | 480 | 561 | 395 | 616 | 423 | 428 | 298 | 502 | 692 | 662 | 568 | 452 | 492 | 546 | 499 | 1467 | 759 | 1086 | 972 | |
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-off | cross | cross | cross-off |
High Tide | 12:45PM0.63m | 10:43PM0.26m | 1:30PM0.66m | 00:28AM0.25m | 2:09PM0.70m | 1:28AM0.26m | 2:45PM0.72m | 2:12AM0.27m | 3:17PM0.74m | 2:51AM0.29m | 3:48PM0.75m | 3:28AM0.31m | ||||||||
Low Tide | 4:16AM0.12m | 9:32PM0.26m | 5:13AM0.11m | 9:33PM0.22m | 6:08AM0.10m | 9:50PM0.20m | 6:58AM0.08m | 10:10PM0.18m | 7:41AM0.05m | 10:32PM0.17m | 8:21AM0.04m | 10:55PM0.16m | ||||||||
— | — | 6:01 | — | — | 6:01 | — | — | 6:01 | — | — | 6:03 | — | — | 6:03 | — | — | 6:03 | — | — | |
7:15 | — | — | 7:14 | — | — | 7:14 | — | — | 7:14 | — | — | 7:13 | — | — | 7:13 | — | — | 7:12 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 26 | 24 | 26 | 26 | 25 | 26 | 27 | 25 | 26 | 27 | 25 | 26 | 27 | 25 | 26 | 27 | 25 | 26 | 28 | 25 |
Feels °C | 22 | 22 | 22 | 22 | 23 | 23 | 24 | 23 | 23 | 24 | 24 | 24 | 25 | 23 | 24 | 24 | 24 | 25 | 26 | 25 |
Swell 1 Height (m) Direction Period (s) | S 13 | S 13 | SSW 20 | SSW 20 | SSW 18 | SSW 18 | SSW 17 | SSW 16 | SSW 19 | SSW 18 | SSW 18 | SSW 16 | SSW 16 | E 14 | E 14 | E 13 | E 13 | SSW 14 | S 14 | E 13 |
268 | 206 | 561 | 395 | 616 | 329 | 428 | 298 | 502 | 692 | 662 | 568 | 452 | 492 | 546 | 499 | 875 | 189 | 232 | 972 | |
Swell 2 Height (m) Direction Period (s) | SSW 23 | SSW 22 | S 12 | S 11 | S 11 | S 12 | S 12 | S 20 | SSW 16 | S 11 | E 16 | E 15 | E 15 | SSW 16 | SSW 15 | SSW 15 | SSW 14 | SSE 10 | — | SSW 14 |
426 | 480 | 132 | 90 | 81 | 143 | 102 | 296 | 288 | 61 | 78 | 267 | 357 | 416 | 288 | 284 | 213 | 19 | — | 192 | |
Swell 3 Height (m) Direction Period (s) | E 11 | E 12 | SW 16 | E 11 | S 13 | SW 16 | S 21 | S 12 | S 11 | E 13 | S 11 | S 11 | S 10 | S 10 | S 11 | SSE 10 | NNE 10 | NNE 9 | S 9 | SW 21 |
90 | 139 | 124 | 88 | 85 | 118 | 329 | 103 | 63 | 55 | 37 | 37 | 19 | 7 | 20 | 21 | 9 | 8 | 2 | 18 | |
Wind waves Height (m) Direction Period (s) | ENE 7 | E 6 | E 6 | E 7 | E 7 | E 7 | E 7 | E 7 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 13 | E 13 | ENE 13 | ENE 13 |
157 | 109 | 297 | 214 | 271 | 423 | 278 | 272 | 202 | 264 | 253 | 226 | 237 | 160 | 140 | 139 | 1467 | 759 | 1086 | 953 | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 21 | 12 | 24 | 24 | 15 | 21 | 27 | 12 | 21 | 144 | 12 | 12 | 24 | 12 | 12 | 22 | 12 | 10 | 12 | 0 |
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.










