
Surf Forecasts:
Sandy Beach surf forecast from 21 Jul 2026:
- Most powerful swell: Tuesday 28 Jul, 2AM (local time) - 6.5ft (2.0m), 14s period, E swell with 1,620 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 2.0m 14s and forecast to arrive on Tuesday (Jul 28) at 2AM. 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 16s period and expected on Tuesday (Jul 21) at 5PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 2AM (Tue 28th Jul) | 6.5ft (2.0m) 14s |
Table - best surf conditions forecast for Sandy Beach over the next 16 days.
The Lowdown
Alright, let's get into it. This is a rough stretch ahead, but there are a couple of moments worth paddling out for.
Sandy Beach is a beach and reef set-up, exposed to the swell. For the time of year, the water temp is about average, nothing unusual there. The issue is, for the next several days and into the first week, the wind is a real problem. It’s blowing cross or cross-onshore from the ENE most of the time, with moderate to strong breezes, which is chopping everything up. The combined swell energy is moderate to strong at times, but the quality is just poor. You’ve got a mix of short period windswell and some longer period groundswell from the SSE and SSW, but the wind ruins it. There’s a run of days from Tuesday the 21st right through to Sunday the 26th where the surf is either poor or marginal. It’s a long gap of flat, messy conditions.
Now, things start to look a little more interesting around Monday the 27th and into the 28th. We get a pulse of easterly swell, with the combined energy climbing into the strong range. The swell height is getting up there, around 6ft to 7ft from the east, with a decent period of 14 seconds. This is proper groundswell, which at a beach and reef can sometimes close out, but it’ll bring power. The crowd factor is 'often' here, so expect company. Unfortunately, the wind is still cross-shore from the NE, so it won’t be glassy, but it’s manageable. The best bet of the whole outlook is probably the morning of Tuesday the 28th of July. The swell is 7ft from the east, and the wind is a moderate cross-shore breeze. That’s the biggest, most energetic swell of the period, but at that size (over 8ft), it’s really only for experienced surfers. It’s not perfect due to the wind, but it’s the closest we get to something with real punch.
After that, the swell drops off rapidly. By the 30th of July, it’s down to 4ft and the energy is fading. The end of the outlook, into early August, is back to poor conditions with weak, short-period windswell and onshore winds. There’s a brief flicker of cleaner conditions on the 4th of August afternoon with a cross-offshore breeze, but the swell is only 3ft. It’s not a standout.
Honestly, the long-range stuff for the first week of August looks pretty grim. If you’re looking for the best wave, it’s that Tuesday morning, the 28th of July, when the east swell is pumping. For the rest, you’re mostly battling the wind.
Rusty.
Short Range ForecastLight rain (total 6mm), mostly falling on Mon night. Warm (max 26°C on Tue afternoon, min 24°C on Wed morning). Mainly fresh winds. | Days 5-7 Weather SummaryMostly dry. Warm (max 25°C on Thu night, min 24°C on Thu night). Mainly strong winds. | ||||||||||||||||||
Tuesday 21 | Wednesday 22 | Thursday 23 | Friday 24 | Saturday 25 | Sunday 26 | ||||||||||||||
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 15 | S 14 | S 14 | S 13 | SSW 24 | SSW 23 | SSW 22 | SSW 20 | SSW 20 | SSW 18 | ENE 7 | ENE 7 | ENE 7 | ENE 8 | SSW 18 | E 17 | E 16 | E 16 | E 15 |
Wave Graph | |||||||||||||||||||
339 | 329 | 311 | 277 | 317 | 426 | 363 | 412 | 395 | 464 | 358 | 408 | 469 | 400 | 572 | 594 | 984 | 1087 | 1344 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross | cross-on | cross-on | cross | cross | cross-on | cross | cross | cross-on | cross-on | cross | cross-on | cross | cross | cross | cross | cross | cross-on |
High Tide | 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 | 2:33AM0.04m | 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 | — | — | 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 | 2 | 1 | — | 3 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 25 | 25 | 26 | 25 | 24 | 25 | 25 | 25 | 25 | 25 | 24 | 25 | 25 | 24 | 25 | 24 | 24 | 25 | 25 |
Feels °C | 23 | 25 | 25 | 25 | 21 | 22 | 22 | 22 | 21 | 22 | 21 | 22 | 23 | 22 | 21 | 20 | 21 | 22 | 22 |
Swell 1 Height (m) Direction Period (s) | ENE 7 | ENE 7 | S 14 | S 13 | S 13 | E 11 | S 13 | SSW 20 | SSW 20 | SSW 18 | SSW 18 | SSW 17 | SSW 16 | SSW 19 | SSW 18 | E 17 | E 16 | E 16 | E 15 |
162 | 136 | 311 | 277 | 215 | 123 | 157 | 412 | 395 | 464 | 329 | 340 | 232 | 391 | 572 | 594 | 984 | 1087 | 1344 | |
Swell 2 Height (m) Direction Period (s) | S 15 | S 14 | SW 16 | E 13 | E 12 | S 10 | SSW 22 | S 12 | S 11 | S 11 | S 12 | S 12 | S 20 | SSW 16 | E 14 | SSW 18 | SSW 16 | SSW 16 | SSW 16 |
339 | 329 | 67 | 121 | 138 | 78 | 363 | 97 | 93 | 56 | 143 | 102 | 299 | 223 | 146 | 547 | 469 | 452 | 416 | |
Swell 3 Height (m) Direction Period (s) | SW 16 | SW 17 | E 11 | SW 15 | SSW 24 | SSW 23 | SW 18 | SSW 16 | SW 16 | S 13 | SSW 16 | S 21 | S 12 | E 14 | S 11 | S 11 | S 11 | S 11 | S 10 |
69 | 72 | 39 | 60 | 317 | 426 | 150 | 99 | 127 | 85 | 94 | 231 | 100 | 103 | 60 | 37 | 36 | 35 | 19 | |
Wind waves Height (m) Direction Period (s) | — | — | ENE 7 | ENE 7 | ENE 7 | ENE 6 | ENE 6 | ENE 6 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | NE 8 |
— | — | 136 | 153 | 187 | 145 | 246 | 280 | 326 | 435 | 358 | 408 | 469 | 400 | 436 | 453 | 356 | 356 | 236 | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 16 | 16 | 42 | 16 | 48 | 50 | 55 | 55 | 57 | 47 | 55 | 110 | 48 | 47 | 57 | 47 | 47 | 110 | 47 |
Best forecast wave conditions in Oahu | |||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||
Header Global | |||||||||||||||||||
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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.










