Surf Forecasts:
Sandy Beach surf forecast from 20 Jul 2026:
- Most powerful swell: Sunday 26 Jul, 5AM (local time) - 5ft (1.6m), 17s period, E swell with 1,383 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 1.6m 17s and forecast to arrive on Sunday (Jul 26) at 5AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 18s period and expected on Monday (Jul 20) at 2PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 5AM (Sun 26th Jul) | 5ft (1.6m) 17s |
Table - best surf conditions forecast for Sandy Beach over the next 16 days.
The Lowdown
Alright, Rusty here, let's talk about what's on offer this week and beyond.
Right off the bat, I gotta be straight with you—this 16-day window is looking pretty grim for Sandy Beach. The forecast is loaded with nothing but poor surf conditions, and that's not just a one-off. We're staring at a long, dry patch from the start all the way through to the end of July. The first real glimmer of anything that might be worth a paddle doesn't show up until Wednesday, July 29th, and even then it's still a bit of a question mark.
The water temp is sitting around 80°F, which is pretty much standard for this time of year, so at least you won't be freezing your toes off while you're sitting there wondering where the waves went.
Now, let's look at the one spot that might just save the whole run. Wednesday, July 29th, the morning is your best bet. The swell is coming from the ENE at 6 ft, with a period of 11 seconds. That's a solid, long-period groundswell bringing some proper energy (combined energy of 1045). The wind is a gentle cross-shore from the NE at 9 mph, which is the lightest we see across the whole forecast. That'll keep the surface pretty clean. Sandy Beach is a beach and reef setup, and with a long-period swell like this, it'll be breaking a bit straighter in the beachy sections, but the reef could offer up some better lines. The water temp is still normal, so no surprises there. Crowds are "often" an issue here, so expect company.
Honestly, that Wednesday morning is the standout. After that, we're back into the marginal or poor stuff. The following days see the wind pick up again, the swell gets a bit jumbled, and the period drops. There's a decent-sized swell around Sunday, August 2nd, but it's coming with a short, choppy period of 7-8 seconds and strong cross-shore winds, which will just make a mess of it. That's more of a kite-surfing setup than a proper paddle session.
So, to wrap it up: if you're desperate, point your car towards Sandy Beach on the morning of Wednesday, July 29th. It's not a classic, but it's the only thing on the menu that's worth a look. The rest of the time, you might be better off checking the cams and waiting for a better forecast.
Rusty.
Short Range ForecastModerate rain (total 11mm), heaviest on Tue morning. Warm (max 26°C on Mon morning, min 24°C on Wed night). Mainly fresh winds. | Days 4-6 Weather SummaryLight rain (total 2mm), mostly falling on Thu morning. Warm (max 25°C on Thu morning, min 24°C on Fri night). Mainly strong winds. | ||||||||||||||||||||
Monday 20 | Tuesday 21 | Wednesday 22 | Thursday 23 | Friday 24 | Saturday 25 | Sunday 26 | |||||||||||||||
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 8 | S 16 | S 15 | S 14 | S 14 | S 13 | SSW 24 | SSW 23 | SSW 22 | E 7 | SSW 20 | SSW 18 | ENE 7 | ENE 7 | ENE 7 | ENE 8 | E 18 | E 17 | E 16 | E 16 | E 15 |
Wave Graph  | |||||||||||||||||||||
 kJ | 161 | 321 | 339 | 329 | 311 | 277 | 317 | 426 | 363 | 412 | 395 | 464 | 358 | 482 | 558 | 414 | 607 | 1275 | 1301 | 1253 | 1275 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross-on | cross-on | cross | cross-on | cross | cross | cross-on | cross | cross | cross-on | cross | cross | cross-on | cross | cross | cross | cross | cross | cross |
High Tide | 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 | 1:20PM0.64m | 00:50AM0.19m | 1:55PM0.66m | 1:32AM0.20m | |||||||
Low Tide | 2:57PM0.28m | 2:33AM0.04m | 5:25PM0.28m | 3:12AM0.05m | 7:38PM0.23m | 3:57AM0.05m | 8:24PM0.18m | 8:50PM0.15m | 5:38AM0.03m | 9:14PM0.12m | 6:24AM0.02m | 9:38PM0.11m | |||||||||
 | |  |  | | |  | | | | |  | | |  | | | | | | | |
 | 5:58 | — | — | 5:58 | — | — | 6:00 | — | — | 6:00 | — | — | 6:00 | — | — | 6:01 | — | — | 6:01 | — | — |
 | — | 7:14 | — | — | 7:14 | — | — | 7:13 | — | — | 7:13 | — | — | 7:13 | — | — | 7:12 | — | — | 7:12 | — |
mm | — | — | 1 | 3 | 2 | 4 | — | — | 1 | 1 | — | — | — | — | — | 1 | — | — | — | — | — |
Temp °C | 26 | 26 | 25 | 26 | 26 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 |
Feels °C | 25 | 25 | 23 | 26 | 24 | 23 | 22 | 22 | 22 | 21 | 21 | 21 | 22 | 21 | 21 | 23 | 22 | 22 | 23 | 22 | 23 |
Swell 1 Height (m) Direction Period (s) | S 14 | S 16 | S 15 | ENE 7 | S 14 | S 13 | S 13 | E 11 | E 12 | SSW 20 | SSW 20 | SSW 18 | SSW 18 | SSW 17 | SSW 16 | SSW 19 | E 18 | E 17 | E 16 | E 16 | E 15 |
| kJ | 142 | 321 | 339 | 153 | 311 | 277 | 215 | 123 | 139 | 412 | 395 | 464 | 329 | 340 | 232 | 391 | 607 | 1275 | 1301 | 1253 | 1275 |
Swell 2 Height (m) Direction Period (s) | S 16 | SW 18 | SW 16 | S 14 | SW 16 | E 13 | E 12 | S 10 | S 13 | S 12 | S 11 | S 13 | S 12 | S 12 | S 20 | SSW 16 | SSW 18 | SSW 18 | SSW 16 | S 16 | SSW 16 |
| kJ | 135 | 81 | 69 | 329 | 67 | 121 | 138 | 78 | 157 | 97 | 90 | 85 | 105 | 102 | 299 | 223 | 572 | 547 | 469 | 522 | 416 |
Swell 3 Height (m) Direction Period (s) | SW 18 | W 12 | E 12 | SW 17 | E 11 | SW 15 | SSW 24 | SSW 23 | SSW 22 | SSW 16 | SW 16 | S 11 | SSW 15 | S 21 | E 16 | E 14 | S 11 | S 11 | S 11 | SE 12 | SE 11 |
| kJ | 83 | 11 | 12 | 72 | 39 | 60 | 317 | 426 | 363 | 99 | 127 | 56 | 93 | 231 | 181 | 148 | 39 | 37 | 35 | 5 | 5 |
Wind waves Height (m) Direction Period (s) | ENE 8 | ENE 7 | ENE 7 | — | ENE 7 | ENE 7 | ENE 7 | ENE 6 | ENE 7 | E 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 8 | ENE 8 | ENE 8 | NE 8 | NE 8 | NE 8 |
| kJ | 161 | 169 | 197 | — | 132 | 176 | 171 | 145 | 240 | 377 | 268 | 461 | 358 | 482 | 558 | 414 | 477 | 452 | 353 | 335 | 276 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 16 | 47 | 16 | 47 | 47 | 47 | 48 | 50 | 47 | 55 | 61 | 48 | 48 | 57 | 47 | 45 | 55 | 16 | 47 | 110 | 16 |
Best forecast wave conditions in Oahu | |||||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
FREE! Surf-Forecast.com widget for your website
The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Sandy Beach surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.
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.
Nearest