Surf Forecasts:
Sandy Beach surf forecast from 29 Aug 2026:
- Most powerful swell: Tuesday 1 Sep, 5PM (local time) - 7ft (2.1m), 8s period, ENE swell with 569 kJ wave energy.
Best Forecast Surf Conditions for Sandy Beach this week:
The most powerful waves expected at Sandy Beach in the next 16 days are 2.1m 8s and forecast to arrive on Tuesday (Sep 01) at 5PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 17s period and expected on Saturday (Aug 29) at 11PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 5PM (Tue 1st Sep) | 7ft (2.1m) 8s |
Table - best surf conditions forecast for Sandy Beach over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s break down the next couple of weeks at Sandy Beach.
Honestly, it’s a tough stretch ahead. The overall pattern is dominated by persistent cross-shore winds and messy conditions, with very few windows of opportunity. For the first nine days, from Friday 28 August all the way through to Saturday 5 September, it’s a write-off. The wind is a constant problem—stiff ENE breezes at 18-25 mph, creating lumpy, cross-chop conditions. Surf heights bob around between 3 ft and 7 ft, but the quality is just poor for surfing. The combined wave energy sits in the moderate range, but it’s all windswell with short periods under 8 seconds. There’s a solid gap with no real recommendations until we hit the second week.
The only glimmer comes on Monday 7 September. The morning sees a jump in swell to 8 ft from the ENE, with a period stretching to 11 seconds—that’s groundswell energy starting to show. But here’s the catch: the wind is still a fresh cross-shore from the NE at 18 mph. It’s labelled as marginal, and that’s about right. The swell is getting there, but the wind will keep it lumpy. Not a standout, just a maybe.
The real standout moment is on Wednesday afternoon, 9 September. We get a 10 ft swell from the ENE—that’s a solid pulse of power. But—and this is a big but—it’s likely too big for Sandy Beach, which is a beach and reef setup. The wind is still a fresh cross-shore, so it will be raw and heavy. This is experts-only territory, and even then, it’s a battle. The size is the limiting factor. It’s not a clean, user-friendly day.
After that, the surf settles back into the 4 ft to 7 ft range through to Saturday 12 September, but the wind finally eases. On Friday morning, 11 September, we get a light breeze from the SW at 6 mph and a 6 ft ENE swell. The conditions finally clean up a bit. The Saturday morning on 12 September has an onshore wind from the SE, so that’s no good either.
So, to wrap it up: there is no true standout in this 16-day window. If I had to pick the best on offer, it’s the morning of Monday 7 September for the groundswell, if you can deal with the lumpy wind. The water temp is 81°F with a slight warm anomaly, so it’s about average for this time of year—warm and tropical as usual.
Stay patient, keep an eye on the long-range, and remember the wind is the enemy here.
Rusty.
Short Range ForecastMostly dry. Warm (max 26°C on Sun afternoon, min 25°C on Fri afternoon). Mainly strong winds. | Days 5-7 Weather SummarySome drizzle, heaviest during Wed morning. Warm (max 26°C on Wed afternoon, min 25°C on Mon afternoon). Mainly fresh winds. | |||||||||||||||||||
Fri 28 | Saturday 29 | Sunday 30 | Monday 31 | Tuesday 1 | Wednesday 2 | Thursday 3 | ||||||||||||||
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) | S 14 | S 13 | ENE 6 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | S 16 | NE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 |
Wave Graph | ||||||||||||||||||||
329 | 229 | 172 | 189 | 371 | 336 | 348 | 303 | 400 | 430 | 481 | 520 | 569 | 499 | 422 | 378 | 441 | 361 | 322 | 310 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-on | cross | cross | cross-on | cross | cross | cross-on | cross-on | cross | cross | cross | cross | cross | cross | cross | cross-on | cross | cross | cross |
High Tide | 3:21PM0.62m | 3:47AM0.44m | 3:48PM0.58m | 4:31AM0.49m | 4:17PM0.51m | 5:19AM0.53m | 4:46PM0.43m | 6:14AM0.56m | 5:18PM0.36m | 7:19AM0.59m | 5:54PM0.28m | 8:36AM0.61m | 7:01PM0.22m | |||||||
Low Tide | 10:10PM0.06m | 9:43AM0.10m | 10:32PM0.05m | 10:34AM0.14m | 10:56PM0.04m | 11:35AM0.19m | 11:23PM0.04m | 12:53PM0.23m | 11:56PM0.04m | 2:47PM0.24m | 00:39AM0.05m | 5:18PM0.21m | 1:39AM0.06m | |||||||
— | — | 6:13 | — | — | 6:13 | — | — | 6:13 | — | — | 6:13 | — | — | 6:13 | — | — | 6:13 | — | — | |
6:50 | — | — | 6:49 | — | — | 6:47 | — | — | 6:46 | — | — | 6:46 | — | — | 6:45 | — | — | 6:45 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | — | — | — | — | — |
Temp °C | 25 | 25 | 25 | 25 | 25 | 25 | 26 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 26 | 25 | 25 | 25 | 25 |
Feels °C | 22 | 22 | 21 | 22 | 22 | 21 | 22 | 22 | 22 | 22 | 22 | 23 | 22 | 22 | 23 | 24 | 23 | 23 | 23 | 23 |
Swell 1 Height (m) Direction Period (s) | S 14 | S 13 | E 13 | E 12 | 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 |
329 | 229 | 126 | 110 | 102 | 171 | 100 | 199 | 144 | 138 | 192 | 329 | 314 | 364 | 422 | 322 | 275 | 268 | 192 | 225 | |
Swell 2 Height (m) Direction Period (s) | E 15 | E 14 | S 13 | S 13 | E 12 | SSW 12 | SSW 16 | S 11 | S 11 | S 11 | S 10 | SSW 14 | S 12 | S 10 | SSE 10 | S 11 | E 13 | E 13 | E 12 | E 12 |
109 | 146 | 85 | 89 | 106 | 46 | 162 | 59 | 82 | 55 | 51 | 80 | 77 | 35 | 19 | 37 | 87 | 121 | 107 | 102 | |
Swell 3 Height (m) Direction Period (s) | SSW 19 | SW 19 | S 13 | S 12 | SSW 17 | SSE 12 | W 11 | ENE 10 | S 21 | SSW 19 | SW 14 | S 10 | SW 14 | SW 14 | SW 14 | E 12 | S 11 | SSE 10 | SSE 10 | SW 18 |
36 | 56 | 89 | 75 | 186 | 48 | 9 | 37 | 34 | 122 | 54 | 30 | 51 | 51 | 30 | 26 | 58 | 33 | 34 | 12 | |
Wind waves Height (m) Direction Period (s) | ENE 6 | ENE 6 | ENE 6 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | NE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 |
156 | 194 | 172 | 189 | 371 | 336 | 348 | 303 | 400 | 430 | 481 | 520 | 569 | 499 | 363 | 378 | 441 | 361 | 322 | 310 | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 59 | 47 | 48 | 57 | 55 | 55 | 110 | 47 | 55 | 55 | 47 | 47 | 110 | 47 | 47 | 55 | 47 | 47 | 47 | 16 |
Best forecast wave conditions in Oahu | ||||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||||
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Information about the Sandy Beach Surf forecast
The above surf forecast table for Sandy Beach provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Sandy Beach can be found by selecting the local surf guide option on the grey menu. Our Sandy Beach 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 (Sandy Beach) 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 Sandy Beach 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.
Sandy's Beach is 15 km (9 miles) from the city of Kailua. If you plan a vacation in Oahu, look for hotels and other accommodation in Kailua. Kailua has rooms for a wide range of budgets as well as car hire and transport links.











