Surf Forecasts:
Sandy Beach surf forecast from 18 Jul 2026:
- Most powerful swell: Saturday 25 Jul, 8AM (local time) - 3ft (0.9m), 19s period, SSW swell with 627 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 0.9m 19s and forecast to arrive on Saturday (Jul 25) at 8AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 13s period and expected on Saturday (Jul 18) at 8AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 8AM (Sat 25th Jul) | 3ft (0.9m) 19s |
Table - best surf conditions forecast for Sandy Beach over the next 16 days.
The Lowdown
Alright, this is Rusty. Let’s take a look at what’s cooking at Sandy Beach.
Right now, we’ve got a long dry spell coming. From Saturday, July 18th right through to Friday, July 24th, there’s no decent surf to speak of. The wind is pinned from the ENE, blowing a steady 15 to 25 mph cross-shore, and it’s chopping everything up. The swell is small and weak, with the combined energy mostly in the high hundreds (459 to 1024), so just moderate juice. The water is 80°, which is about average for this time of year.
The best shot in this window looks to be Saturday, July 25th and Sunday, July 26th. A long-period groundswell from the south-southwest to east starts pumping in, 5ft to 6ft, with energy jumping into the strong range (1133 to 2008). However, the wind is still cross-shore from the ENE at 15 to 18 mph, so the surface will be lumpy and messy. The break likes swell from the ESE, so the east swell on Sunday is a good match, but the wind will foul it up. The long period (16-17 seconds) means good shape, but for a beach and reef spot, those long-period waves can break a bit too straight.
Then on Monday, July 27th and Tuesday, July 28th, the swell hits 7ft to 7ft from the east, with energy over 2000 - that’s very strong. This is getting into big-wave territory for most, and it’s gonna be a handful with the cross-shore wind (15-18 mph). Crowds are often around here, and with that size, it’ll be a zoo for the crew who can handle it. The period drops to 14-15 seconds, still good quality, but the wind is the buzzkill. After that, the energy fades into the 29th to August 2nd, with the wind staying cross-shore the whole time.
If I had to pick one moment, Monday the 27th at Sandy Beach is the biggest and most powerful day, with a 7ft east swell (close to the optimum ESE direction), very strong energy (2336), and consistent sets. But that cross-shore wind is gonna keep the surface bumpy. It won’t be glassy, but there will be some heavy lumps.
For clean, tidy waves? This forecast just doesn’t have a true standout. The kitesurfers might be having a better time out there with that cross-shore breeze and the punchy swell later on.
Keep an eye on it – forecasts can switch up fast.
Rusty.
Short Range ForecastMostly dry. Warm (max 25°C on Sat morning, min 24°C on Sat night). Winds decreasing (strong winds from the ENE on Sat afternoon, light winds from the ENE by Mon night). | Days 4-6 Weather SummaryMostly dry. Warm (max 26°C on Tue morning, min 24°C on Tue night). Mainly fresh winds. | ||||||||||||||||||||
Saturday 18 | Sunday 19 | Monday 20 | Tuesday 21 | Wednesday 22 | Thursday 23 | Friday 24 | |||||||||||||||
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 7 | ENE 8 | ENE 8 | E 8 | ENE 8 | ENE 8 | ENE 8 | S 16 | S 15 | S 14 | S 14 | S 13 | ENE 7 | SSW 23 | ENE 12 | SSW 20 | SSW 20 | SSW 18 | SSW 18 | SSW 17 | ENE 7 |
Wave Graph  | |||||||||||||||||||||
 kJ | 360 | 385 | 353 | 333 | 238 | 257 | 191 | 321 | 339 | 329 | 307 | 273 | 149 | 426 | 609 | 412 | 395 | 464 | 329 | 428 | 369 |
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-on | cross | cross | cross-on | cross | cross | cross-on | cross | cross | cross-on |
High Tide | 6:10PM0.55m | 7:46AM0.40m | 6:42PM0.45m | 8:59AM0.45m | 7:13PM0.37m | 10:08AM0.51m | 7:46PM0.29m | 11:08AM0.55m | 8:50PM0.23m | 11:59AM0.59m | 10:38PM0.19m | 12:42PM0.62m | 11:56PM0.19m | ||||||||
Low Tide | 11:55AM0.16m | 1:26AM0.03m | 1:10PM0.23m | 1:58AM0.03m | 2:57PM0.28m | 2:33AM0.04m | 5:25PM0.28m | 3:12AM0.05m | 7:38PM0.23m | 3:57AM0.05m | 8:24PM0.18m | 8:50PM0.15m | |||||||||
 | |  | | | | |  | | | |  | | | | | | | | | | |
 | 5:58 | — | — | 5:58 | — | — | 5:58 | — | — | 5:58 | — | — | 6:00 | — | — | 6:00 | — | — | 6:00 | — | — |
 | — | 7:15 | — | — | 7:14 | — | — | 7:14 | — | — | 7:14 | — | — | 7:13 | — | — | 7:13 | — | — | 7:13 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 25 | 25 | 24 | 25 | 25 | 25 | 25 | 25 | 25 | 26 | 26 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 |
Feels °C | 22 | 21 | 21 | 22 | 22 | 23 | 24 | 23 | 23 | 25 | 24 | 23 | 22 | 22 | 23 | 21 | 21 | 22 | 22 | 22 | 22 |
Swell 1 Height (m) Direction Period (s) | SSW 13 | SSW 14 | S 12 | SSW 13 | SSW 13 | SSW 12 | S 14 | S 16 | S 15 | S 14 | S 14 | S 13 | E 12 | E 11 | S 13 | SSW 20 | SSW 20 | SSW 18 | SSW 18 | SSW 17 | SSW 16 |
| kJ | 141 | 158 | 112 | 93 | 95 | 45 | 142 | 321 | 339 | 329 | 307 | 273 | 136 | 87 | 157 | 412 | 395 | 464 | 329 | 428 | 298 |
Swell 2 Height (m) Direction Period (s) | WNW 13 | WNW 13 | W 12 | S 19 | S 18 | S 18 | S 16 | SW 18 | SW 16 | SW 17 | SW 16 | E 13 | S 13 | SSW 23 | SSW 22 | S 12 | S 11 | S 11 | S 12 | S 12 | S 20 |
| kJ | 57 | 56 | 28 | 66 | 106 | 97 | 135 | 81 | 69 | 72 | 67 | 119 | 128 | 426 | 363 | 97 | 89 | 55 | 143 | 102 | 305 |
Swell 3 Height (m) Direction Period (s) | SW 15 | SSE 9 | SSE 9 | NNE 8 | W 12 | NNE 8 | SW 18 | W 12 | E 12 | E 12 | E 11 | SW 15 | S 11 | S 13 | SW 18 | SSW 16 | SW 16 | S 13 | SSW 15 | S 21 | S 12 |
| kJ | 55 | 16 | 8 | 11 | 25 | 23 | 83 | 11 | 12 | 25 | 39 | 60 | 57 | 125 | 150 | 100 | 127 | 85 | 91 | 231 | 100 |
Wind waves Height (m) Direction Period (s) | ENE 7 | ENE 8 | ENE 8 | E 8 | ENE 8 | ENE 8 | ENE 8 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 12 | ENE 7 | ENE 6 | ENE 7 | ENE 7 | ENE 7 | ENE 7 |
| kJ | 360 | 385 | 353 | 333 | 238 | 257 | 191 | 214 | 144 | 105 | 108 | 132 | 149 | 129 | 609 | 298 | 256 | 385 | 200 | 263 | 369 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 55 | 55 | 47 | 47 | 59 | 18 | 47 | 47 | 16 | 47 | 47 | 47 | 48 | 57 | 47 | 55 | 59 | 47 | 55 | 55 | 47 |
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.
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